mcs/class/Mono.Posix/Mono.Unix/Syscall.cs

   1 //
   2 // Mono.Unix/Syscall.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@novell.com)
   6 //   Jonathan Pryor (jonpryor@vt.edu)
   7 //
   8 // (C) 2003 Novell, Inc.
   9 // (C) 2004-2005 Jonathan Pryor
  10 //
  11 // This file implements the low-level syscall interface to the POSIX
  12 // subsystem.
  13 //
  14 // This file tries to stay close to the low-level API as much as possible
  15 // using enumerations, structures and in a few cases, using existing .NET
  16 // data types.
  17 //
  18 // Implementation notes:
  19 //
  20 //    Since the values for the various constants on the API changes
  21 //    from system to system (even Linux on different architectures will
  22 //    have different values), we define our own set of values, and we
  23 //    use a set of C helper routines to map from the constants we define
  24 //    to the values of the native OS.
  25 //
  26 //    Bitfields are flagged with the [Map] attribute, and a helper program
  27 //    generates a set of routines that we can call to convert from our value
  28 //    definitions to the value definitions expected by the OS; see
  29 //    UnixConvert for the conversion routines.
  30 //
  31 //    Methods that require tuning are bound as `private sys_NAME' methods
  32 //    and then a `NAME' method is exposed.
  33 //
  34
  35 //
  36 // Permission is hereby granted, free of charge, to any person obtaining
  37 // a copy of this software and associated documentation files (the
  38 // "Software"), to deal in the Software without restriction, including
  39 // without limitation the rights to use, copy, modify, merge, publish,
  40 // distribute, sublicense, and/or sell copies of the Software, and to
  41 // permit persons to whom the Software is furnished to do so, subject to
  42 // the following conditions:
  43 //
  44 // The above copyright notice and this permission notice shall be
  45 // included in all copies or substantial portions of the Software.
  46 //
  47 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  48 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  49 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  50 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  51 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  52 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  53 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  54 //
  55
  56 using System;
  57 using System.Collections;
  58 using System.Runtime.InteropServices;
  59 using System.Text;
  60 using Mono.Unix;
  61
  62 [assembly:Mono.Unix.IncludeAttribute (
  63         new string [] {"sys/types.h", "sys/stat.h", "sys/poll.h", "sys/wait.h",
  64                 "unistd.h", "fcntl.h", "signal.h", "poll.h", "grp.h", "errno.h"},
  65         new string [] {"_GNU_SOURCE", "_XOPEN_SOURCE"})]
  66
  67 namespace Mono.Unix {
  68
  69         #region Enumerations
  70
  71         [Flags][Map]
  72         public enum SyslogOptions {
  73                 LOG_PID    = 0x01,  // log the pid with each message
  74                 LOG_CONS   = 0x02,  // log on the console if errors in sending
  75                 LOG_ODELAY = 0x04,  // delay open until first syslog (default)
  76                 LOG_NDELAY = 0x08,  // don't delay open
  77                 LOG_NOWAIT = 0x10,  // don't wait for console forks; DEPRECATED
  78                 LOG_PERROR = 0x20   // log to stderr as well
  79         }
  80
  81         [Flags][Map]
  82         public enum SyslogFacility {
  83                 LOG_KERN      = 0 << 3,
  84                 LOG_USRE      = 1 << 3,
  85                 LOG_MAIL      = 2 << 3,
  86                 LOG_DAEMON    = 3 << 3,
  87                 LOG_AUTH      = 4 << 3,
  88                 LOG_SYSLOG    = 5 << 3,
  89                 LOG_LPR       = 6 << 3,
  90                 LOG_NEWS      = 7 << 3,
  91                 LOG_UUCP      = 8 << 3,
  92                 LOG_CRON      = 8 << 3,
  93                 LOG_AUTHPRIV  = 10 << 3,
  94                 LOG_FTP       = 11 << 3,
  95                 LOG_LOCAL0    = 16 << 3,
  96                 LOG_LOCAL1    = 17 << 3,
  97                 LOG_LOCAL2    = 18 << 3,
  98                 LOG_LOCAL3    = 19 << 3,
  99                 LOG_LOCAL4    = 20 << 3,
 100                 LOG_LOCAL5    = 21 << 3,
 101                 LOG_LOCAL6    = 22 << 3,
 102                 LOG_LOCAL7    = 23 << 3,
 103         }
 104
 105         [Flags][Map]
 106         public enum SyslogLevel {
 107                 LOG_EMERG   = 0,  // system is unusable
 108                 LOG_ALERT   = 1,  // action must be taken immediately
 109                 LOG_CRIT    = 2,  // critical conditions
 110                 LOG_ERR     = 3,  // warning conditions
 111                 LOG_WARNING = 4,  // warning conditions
 112                 LOG_NOTICE  = 5,  // normal but significant condition
 113                 LOG_INFO    = 6,  // informational
 114                 LOG_DEBUG   = 7   // debug-level messages
 115         }
 116
 117         [Map][Flags]
 118         public enum OpenFlags : int {
 119                 //
 120                 // One of these
 121                 //
 122                 O_RDONLY    = 0x00000000,
 123                 O_WRONLY    = 0x00000001,
 124                 O_RDWR      = 0x00000002,
 125
 126                 //
 127                 // Or-ed with zero or more of these
 128                 //
 129                 O_CREAT     = 0x00000040,
 130                 O_EXCL      = 0x00000080,
 131                 O_NOCTTY    = 0x00000100,
 132                 O_TRUNC     = 0x00000200,
 133                 O_APPEND    = 0x00000400,
 134                 O_NONBLOCK  = 0x00000800,
 135                 O_SYNC      = 0x00001000,
 136
 137                 //
 138                 // These are non-Posix.  Using them will result in errors/exceptions on
 139                 // non-supported platforms.
 140                 //
 141                 // (For example, "C-wrapped" system calls -- calls with implementation in
 142                 // MonoPosixHelper -- will return -1 with errno=EINVAL.  C#-wrapped system
 143                 // calls will generate an exception in UnixConvert, as the value can't be
 144                 // converted on the target platform.)
 145                 //
 146
 147                 O_NOFOLLOW  = 0x00020000,
 148                 O_DIRECTORY = 0x00010000,
 149                 O_DIRECT    = 0x00004000,
 150                 O_ASYNC     = 0x00002000,
 151                 O_LARGEFILE = 0x00008000
 152         }
 153
 154         // mode_t
 155         [Flags][Map]
 156         public enum FilePermissions : uint {
 157                 S_ISUID     = 0x0800, // Set user ID on execution
 158                 S_ISGID     = 0x0400, // Set gorup ID on execution
 159                 S_ISVTX     = 0x0200, // Save swapped text after use (sticky).
 160                 S_IRUSR     = 0x0100, // Read by owner
 161                 S_IWUSR     = 0x0080, // Write by owner
 162                 S_IXUSR     = 0x0040, // Execute by owner
 163                 S_IRGRP     = 0x0020, // Read by group
 164                 S_IWGRP     = 0x0010, // Write by group
 165                 S_IXGRP     = 0x0008, // Execute by group
 166                 S_IROTH     = 0x0004, // Read by other
 167                 S_IWOTH     = 0x0002, // Write by other
 168                 S_IXOTH     = 0x0001, // Execute by other
 169
 170                 S_IRWXG     = (S_IRGRP | S_IWGRP | S_IXGRP),
 171                 S_IRWXU     = (S_IRUSR | S_IWUSR | S_IXUSR),
 172                 S_IRWXO     = (S_IROTH | S_IWOTH | S_IXOTH),
 173                 ACCESSPERMS = (S_IRWXU | S_IRWXG | S_IRWXO), // 0777
 174                 ALLPERMS    = (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO), // 07777
 175                 DEFFILEMODE = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH), // 0666
 176
 177                 // Device types
 178                 // Why these are held in "mode_t" is beyond me...
 179                 S_IFMT      = 0xF000, // Bits which determine file type
 180                 S_IFDIR     = 0x4000, // Directory
 181                 S_IFCHR     = 0x2000, // Character device
 182                 S_IFBLK     = 0x6000, // Block device
 183                 S_IFREG     = 0x8000, // Regular file
 184                 S_IFIFO     = 0x1000, // FIFO
 185                 S_IFLNK     = 0xA000, // Symbolic link
 186                 S_IFSOCK    = 0xC000, // Socket
 187         }
 188
 189         [Map]
 190         public enum FcntlCommand : int {
 191                 // Form /usr/include/bits/fcntl.h
 192                 F_DUPFD    =    0, // Duplicate file descriptor.
 193                 F_GETFD    =    1, // Get file descriptor flags.
 194                 F_SETFD    =    2, // Set file descriptor flags.
 195                 F_GETFL    =    3, // Get file status flags.
 196                 F_SETFL    =    4, // Set file status flags.
 197                 F_GETLK    =   12, // Get record locking info. [64]
 198                 F_SETLK    =   13, // Set record locking info (non-blocking). [64]
 199                 F_SETLKW   =   14, // Set record locking info (blocking). [64]
 200                 F_SETOWN   =    8, // Set owner of socket (receiver of SIGIO).
 201                 F_GETOWN   =    9, // Get owner of socket (receiver of SIGIO).
 202                 F_SETSIG   =   10, // Set number of signal to be sent.
 203                 F_GETSIG   =   11, // Get number of signal to be sent.
 204                 F_SETLEASE = 1024, // Set a lease.
 205                 F_GETLEASE = 1025, // Enquire what lease is active.
 206                 F_NOTIFY   = 1026, // Required notifications on a directory
 207         }
 208
 209         [Map]
 210         public enum LockType : short {
 211                 F_RDLCK = 0, // Read lock.
 212                 F_WRLCK = 1, // Write lock.
 213                 F_UNLCK = 2, // Remove lock.
 214         }
 215
 216         [Map]
 217         public enum SeekFlags : short {
 218                 // values liberally copied from /usr/include/unistd.h
 219                 SEEK_SET = 0, // Seek from beginning of file.
 220                 SEEK_CUR = 1, // Seek from current position.
 221                 SEEK_END = 2, // Seek from end of file.
 222
 223                 L_SET    = SEEK_SET, // BSD alias for SEEK_SET
 224                 L_INCR   = SEEK_CUR, // BSD alias for SEEK_CUR
 225                 L_XTND   = SEEK_END, // BSD alias for SEEK_END
 226         }
 227
 228         [Map, Flags]
 229         public enum DirectoryNotifyFlags : int {
 230                 // from /usr/include/bits/fcntl.h
 231                 DN_ACCESS    = 0x00000001, // File accessed.
 232                 DN_MODIFY    = 0x00000002, // File modified.
 233                 DN_CREATE    = 0x00000004, // File created.
 234                 DN_DELETE    = 0x00000008, // File removed.
 235                 DN_RENAME    = 0x00000010, // File renamed.
 236                 DN_ATTRIB    = 0x00000020, // File changed attributes.
 237                 DN_MULTISHOT = unchecked ((int)0x80000000), // Don't remove notifier
 238         }
 239
 240         [Map]
 241         public enum PosixFadviseAdvice : int {
 242                 POSIX_FADV_NORMAL     = 0,  // No further special treatment.
 243                 POSIX_FADV_RANDOM     = 1,  // Expect random page references.
 244                 POSIX_FADV_SEQUENTIAL = 2,  // Expect sequential page references.
 245                 POSIX_FADV_WILLNEED   = 3,  // Will need these pages.
 246                 POSIX_FADV_DONTNEED   = 4,  // Don't need these pages.
 247                 POSIX_FADV_NOREUSE    = 5,  // Data will be accessed once.
 248         }
 249
 250         [Map]
 251         public enum PosixMadviseAdvice : int {
 252                 POSIX_MADV_NORMAL     = 0,  // No further special treatment.
 253                 POSIX_MADV_RANDOM     = 1,  // Expect random page references.
 254                 POSIX_MADV_SEQUENTIAL = 2,  // Expect sequential page references.
 255                 POSIX_MADV_WILLNEED   = 3,  // Will need these pages.
 256                 POSIX_MADV_DONTNEED   = 4,  // Don't need these pages.
 257         }
 258
 259         [Map]
 260         public enum Signum : int {
 261                 SIGHUP    =  1, // Hangup (POSIX).
 262                 SIGINT    =  2, // Interrupt (ANSI).
 263                 SIGQUIT   =  3, // Quit (POSIX).
 264                 SIGILL    =  4, // Illegal instruction (ANSI).
 265                 SIGTRAP   =  5, // Trace trap (POSIX).
 266                 SIGABRT   =  6, // Abort (ANSI).
 267                 SIGIOT    =  6, // IOT trap (4.2 BSD).
 268                 SIGBUS    =  7, // BUS error (4.2 BSD).
 269                 SIGFPE    =  8, // Floating-point exception (ANSI).
 270                 SIGKILL   =  9, // Kill, unblockable (POSIX).
 271                 SIGUSR1   = 10, // User-defined signal 1 (POSIX).
 272                 SIGSEGV   = 11, // Segmentation violation (ANSI).
 273                 SIGUSR2   = 12, // User-defined signal 2 (POSIX).
 274                 SIGPIPE   = 13, // Broken pipe (POSIX).
 275                 SIGALRM   = 14, // Alarm clock (POSIX).
 276                 SIGTERM   = 15, // Termination (ANSI).
 277                 SIGSTKFLT = 16, // Stack fault.
 278                 SIGCLD    = SIGCHLD, // Same as SIGCHLD (System V).
 279                 SIGCHLD   = 17, // Child status has changed (POSIX).
 280                 SIGCONT   = 18, // Continue (POSIX).
 281                 SIGSTOP   = 19, // Stop, unblockable (POSIX).
 282                 SIGTSTP   = 20, // Keyboard stop (POSIX).
 283                 SIGTTIN   = 21, // Background read from tty (POSIX).
 284                 SIGTTOU   = 22, // Background write to tty (POSIX).
 285                 SIGURG    = 23, // Urgent condition on socket (4.2 BSD).
 286                 SIGXCPU   = 24, // CPU limit exceeded (4.2 BSD).
 287                 SIGXFSZ   = 25, // File size limit exceeded (4.2 BSD).
 288                 SIGVTALRM = 26, // Virtual alarm clock (4.2 BSD).
 289                 SIGPROF   = 27, // Profiling alarm clock (4.2 BSD).
 290                 SIGWINCH  = 28, // Window size change (4.3 BSD, Sun).
 291                 SIGPOLL   = SIGIO, // Pollable event occurred (System V).
 292                 SIGIO     = 29, // I/O now possible (4.2 BSD).
 293                 SIGPWR    = 30, // Power failure restart (System V).
 294                 SIGSYS    = 31, // Bad system call.
 295                 SIGUNUSED = 31
 296         }
 297
 298         [Flags][Map]
 299         public enum WaitOptions : int {
 300                 WNOHANG   = 1,  // Don't block waiting
 301                 WUNTRACED = 2,  // Report status of stopped children
 302         }
 303
 304   [Flags][Map]
 305         public enum AccessMode : int {
 306                 R_OK = 1,
 307                 W_OK = 2,
 308                 X_OK = 4,
 309                 F_OK = 8,
 310         }
 311
 312         [Map]
 313         public enum PathConf : int {
 314                 _PC_LINK_MAX,
 315                 _PC_MAX_CANON,
 316                 _PC_MAX_INPUT,
 317                 _PC_NAME_MAX,
 318                 _PC_PATH_MAX,
 319                 _PC_PIPE_BUF,
 320                 _PC_CHOWN_RESTRICTED,
 321                 _PC_NO_TRUNC,
 322                 _PC_VDISABLE,
 323                 _PC_SYNC_IO,
 324                 _PC_ASYNC_IO,
 325                 _PC_PRIO_IO,
 326                 _PC_SOCK_MAXBUF,
 327                 _PC_FILESIZEBITS,
 328                 _PC_REC_INCR_XFER_SIZE,
 329                 _PC_REC_MAX_XFER_SIZE,
 330                 _PC_REC_MIN_XFER_SIZE,
 331                 _PC_REC_XFER_ALIGN,
 332                 _PC_ALLOC_SIZE_MIN,
 333                 _PC_SYMLINK_MAX,
 334                 _PC_2_SYMLINKS
 335         }
 336
 337         [Map]
 338         public enum SysConf : int {
 339                 _SC_ARG_MAX,
 340                 _SC_CHILD_MAX,
 341                 _SC_CLK_TCK,
 342                 _SC_NGROUPS_MAX,
 343                 _SC_OPEN_MAX,
 344                 _SC_STREAM_MAX,
 345                 _SC_TZNAME_MAX,
 346                 _SC_JOB_CONTROL,
 347                 _SC_SAVED_IDS,
 348                 _SC_REALTIME_SIGNALS,
 349                 _SC_PRIORITY_SCHEDULING,
 350                 _SC_TIMERS,
 351                 _SC_ASYNCHRONOUS_IO,
 352                 _SC_PRIORITIZED_IO,
 353                 _SC_SYNCHRONIZED_IO,
 354                 _SC_FSYNC,
 355                 _SC_MAPPED_FILES,
 356                 _SC_MEMLOCK,
 357                 _SC_MEMLOCK_RANGE,
 358                 _SC_MEMORY_PROTECTION,
 359                 _SC_MESSAGE_PASSING,
 360                 _SC_SEMAPHORES,
 361                 _SC_SHARED_MEMORY_OBJECTS,
 362                 _SC_AIO_LISTIO_MAX,
 363                 _SC_AIO_MAX,
 364                 _SC_AIO_PRIO_DELTA_MAX,
 365                 _SC_DELAYTIMER_MAX,
 366                 _SC_MQ_OPEN_MAX,
 367                 _SC_MQ_PRIO_MAX,
 368                 _SC_VERSION,
 369                 _SC_PAGESIZE,
 370                 _SC_RTSIG_MAX,
 371                 _SC_SEM_NSEMS_MAX,
 372                 _SC_SEM_VALUE_MAX,
 373                 _SC_SIGQUEUE_MAX,
 374                 _SC_TIMER_MAX,
 375                 /* Values for the argument to `sysconf'
 376                          corresponding to _POSIX2_* symbols.  */
 377                 _SC_BC_BASE_MAX,
 378                 _SC_BC_DIM_MAX,
 379                 _SC_BC_SCALE_MAX,
 380                 _SC_BC_STRING_MAX,
 381                 _SC_COLL_WEIGHTS_MAX,
 382                 _SC_EQUIV_CLASS_MAX,
 383                 _SC_EXPR_NEST_MAX,
 384                 _SC_LINE_MAX,
 385                 _SC_RE_DUP_MAX,
 386                 _SC_CHARCLASS_NAME_MAX,
 387                 _SC_2_VERSION,
 388                 _SC_2_C_BIND,
 389                 _SC_2_C_DEV,
 390                 _SC_2_FORT_DEV,
 391                 _SC_2_FORT_RUN,
 392                 _SC_2_SW_DEV,
 393                 _SC_2_LOCALEDEF,
 394                 _SC_PII,
 395                 _SC_PII_XTI,
 396                 _SC_PII_SOCKET,
 397                 _SC_PII_INTERNET,
 398                 _SC_PII_OSI,
 399                 _SC_POLL,
 400                 _SC_SELECT,
 401                 _SC_UIO_MAXIOV,
 402                 _SC_IOV_MAX = _SC_UIO_MAXIOV,
 403                 _SC_PII_INTERNET_STREAM,
 404                 _SC_PII_INTERNET_DGRAM,
 405                 _SC_PII_OSI_COTS,
 406                 _SC_PII_OSI_CLTS,
 407                 _SC_PII_OSI_M,
 408                 _SC_T_IOV_MAX,
 409                 /* Values according to POSIX 1003.1c (POSIX threads).  */
 410                 _SC_THREADS,
 411                 _SC_THREAD_SAFE_FUNCTIONS,
 412                 _SC_GETGR_R_SIZE_MAX,
 413                 _SC_GETPW_R_SIZE_MAX,
 414                 _SC_LOGIN_NAME_MAX,
 415                 _SC_TTY_NAME_MAX,
 416                 _SC_THREAD_DESTRUCTOR_ITERATIONS,
 417                 _SC_THREAD_KEYS_MAX,
 418                 _SC_THREAD_STACK_MIN,
 419                 _SC_THREAD_THREADS_MAX,
 420                 _SC_THREAD_ATTR_STACKADDR,
 421                 _SC_THREAD_ATTR_STACKSIZE,
 422                 _SC_THREAD_PRIORITY_SCHEDULING,
 423                 _SC_THREAD_PRIO_INHERIT,
 424                 _SC_THREAD_PRIO_PROTECT,
 425                 _SC_THREAD_PROCESS_SHARED,
 426                 _SC_NPROCESSORS_CONF,
 427                 _SC_NPROCESSORS_ONLN,
 428                 _SC_PHYS_PAGES,
 429                 _SC_AVPHYS_PAGES,
 430                 _SC_ATEXIT_MAX,
 431                 _SC_PASS_MAX,
 432                 _SC_XOPEN_VERSION,
 433                 _SC_XOPEN_XCU_VERSION,
 434                 _SC_XOPEN_UNIX,
 435                 _SC_XOPEN_CRYPT,
 436                 _SC_XOPEN_ENH_I18N,
 437                 _SC_XOPEN_SHM,
 438                 _SC_2_CHAR_TERM,
 439                 _SC_2_C_VERSION,
 440                 _SC_2_UPE,
 441                 _SC_XOPEN_XPG2,
 442                 _SC_XOPEN_XPG3,
 443                 _SC_XOPEN_XPG4,
 444                 _SC_CHAR_BIT,
 445                 _SC_CHAR_MAX,
 446                 _SC_CHAR_MIN,
 447                 _SC_INT_MAX,
 448                 _SC_INT_MIN,
 449                 _SC_LONG_BIT,
 450                 _SC_WORD_BIT,
 451                 _SC_MB_LEN_MAX,
 452                 _SC_NZERO,
 453                 _SC_SSIZE_MAX,
 454                 _SC_SCHAR_MAX,
 455                 _SC_SCHAR_MIN,
 456                 _SC_SHRT_MAX,
 457                 _SC_SHRT_MIN,
 458                 _SC_UCHAR_MAX,
 459                 _SC_UINT_MAX,
 460                 _SC_ULONG_MAX,
 461                 _SC_USHRT_MAX,
 462                 _SC_NL_ARGMAX,
 463                 _SC_NL_LANGMAX,
 464                 _SC_NL_MSGMAX,
 465                 _SC_NL_NMAX,
 466                 _SC_NL_SETMAX,
 467                 _SC_NL_TEXTMAX,
 468                 _SC_XBS5_ILP32_OFF32,
 469                 _SC_XBS5_ILP32_OFFBIG,
 470                 _SC_XBS5_LP64_OFF64,
 471                 _SC_XBS5_LPBIG_OFFBIG,
 472                 _SC_XOPEN_LEGACY,
 473                 _SC_XOPEN_REALTIME,
 474                 _SC_XOPEN_REALTIME_THREADS,
 475                 _SC_ADVISORY_INFO,
 476                 _SC_BARRIERS,
 477                 _SC_BASE,
 478                 _SC_C_LANG_SUPPORT,
 479                 _SC_C_LANG_SUPPORT_R,
 480                 _SC_CLOCK_SELECTION,
 481                 _SC_CPUTIME,
 482                 _SC_THREAD_CPUTIME,
 483                 _SC_DEVICE_IO,
 484                 _SC_DEVICE_SPECIFIC,
 485                 _SC_DEVICE_SPECIFIC_R,
 486                 _SC_FD_MGMT,
 487                 _SC_FIFO,
 488                 _SC_PIPE,
 489                 _SC_FILE_ATTRIBUTES,
 490                 _SC_FILE_LOCKING,
 491                 _SC_FILE_SYSTEM,
 492                 _SC_MONOTONIC_CLOCK,
 493                 _SC_MULTI_PROCESS,
 494                 _SC_SINGLE_PROCESS,
 495                 _SC_NETWORKING,
 496                 _SC_READER_WRITER_LOCKS,
 497                 _SC_SPIN_LOCKS,
 498                 _SC_REGEXP,
 499                 _SC_REGEX_VERSION,
 500                 _SC_SHELL,
 501                 _SC_SIGNALS,
 502                 _SC_SPAWN,
 503                 _SC_SPORADIC_SERVER,
 504                 _SC_THREAD_SPORADIC_SERVER,
 505                 _SC_SYSTEM_DATABASE,
 506                 _SC_SYSTEM_DATABASE_R,
 507                 _SC_TIMEOUTS,
 508                 _SC_TYPED_MEMORY_OBJECTS,
 509                 _SC_USER_GROUPS,
 510                 _SC_USER_GROUPS_R,
 511                 _SC_2_PBS,
 512                 _SC_2_PBS_ACCOUNTING,
 513                 _SC_2_PBS_LOCATE,
 514                 _SC_2_PBS_MESSAGE,
 515                 _SC_2_PBS_TRACK,
 516                 _SC_SYMLOOP_MAX,
 517                 _SC_STREAMS,
 518                 _SC_2_PBS_CHECKPOINT,
 519                 _SC_V6_ILP32_OFF32,
 520                 _SC_V6_ILP32_OFFBIG,
 521                 _SC_V6_LP64_OFF64,
 522                 _SC_V6_LPBIG_OFFBIG,
 523                 _SC_HOST_NAME_MAX,
 524                 _SC_TRACE,
 525                 _SC_TRACE_EVENT_FILTER,
 526                 _SC_TRACE_INHERIT,
 527                 _SC_TRACE_LOG,
 528                 _SC_LEVEL1_ICACHE_SIZE,
 529                 _SC_LEVEL1_ICACHE_ASSOC,
 530                 _SC_LEVEL1_ICACHE_LINESIZE,
 531                 _SC_LEVEL1_DCACHE_SIZE,
 532                 _SC_LEVEL1_DCACHE_ASSOC,
 533                 _SC_LEVEL1_DCACHE_LINESIZE,
 534                 _SC_LEVEL2_CACHE_SIZE,
 535                 _SC_LEVEL2_CACHE_ASSOC,
 536                 _SC_LEVEL2_CACHE_LINESIZE,
 537                 _SC_LEVEL3_CACHE_SIZE,
 538                 _SC_LEVEL3_CACHE_ASSOC,
 539                 _SC_LEVEL3_CACHE_LINESIZE,
 540                 _SC_LEVEL4_CACHE_SIZE,
 541                 _SC_LEVEL4_CACHE_ASSOC,
 542                 _SC_LEVEL4_CACHE_LINESIZE
 543         }
 544
 545         [Map]
 546         public enum ConfStr : int {
 547                 _CS_PATH,                       /* The default search path.  */
 548                 _CS_V6_WIDTH_RESTRICTED_ENVS,
 549                 _CS_GNU_LIBC_VERSION,
 550                 _CS_GNU_LIBPTHREAD_VERSION,
 551                 _CS_LFS_CFLAGS = 1000,
 552                 _CS_LFS_LDFLAGS,
 553                 _CS_LFS_LIBS,
 554                 _CS_LFS_LINTFLAGS,
 555                 _CS_LFS64_CFLAGS,
 556                 _CS_LFS64_LDFLAGS,
 557                 _CS_LFS64_LIBS,
 558                 _CS_LFS64_LINTFLAGS,
 559                 _CS_XBS5_ILP32_OFF32_CFLAGS = 1100,
 560                 _CS_XBS5_ILP32_OFF32_LDFLAGS,
 561                 _CS_XBS5_ILP32_OFF32_LIBS,
 562                 _CS_XBS5_ILP32_OFF32_LINTFLAGS,
 563                 _CS_XBS5_ILP32_OFFBIG_CFLAGS,
 564                 _CS_XBS5_ILP32_OFFBIG_LDFLAGS,
 565                 _CS_XBS5_ILP32_OFFBIG_LIBS,
 566                 _CS_XBS5_ILP32_OFFBIG_LINTFLAGS,
 567                 _CS_XBS5_LP64_OFF64_CFLAGS,
 568                 _CS_XBS5_LP64_OFF64_LDFLAGS,
 569                 _CS_XBS5_LP64_OFF64_LIBS,
 570                 _CS_XBS5_LP64_OFF64_LINTFLAGS,
 571                 _CS_XBS5_LPBIG_OFFBIG_CFLAGS,
 572                 _CS_XBS5_LPBIG_OFFBIG_LDFLAGS,
 573                 _CS_XBS5_LPBIG_OFFBIG_LIBS,
 574                 _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS,
 575                 _CS_POSIX_V6_ILP32_OFF32_CFLAGS,
 576                 _CS_POSIX_V6_ILP32_OFF32_LDFLAGS,
 577                 _CS_POSIX_V6_ILP32_OFF32_LIBS,
 578                 _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS,
 579                 _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS,
 580                 _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS,
 581                 _CS_POSIX_V6_ILP32_OFFBIG_LIBS,
 582                 _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS,
 583                 _CS_POSIX_V6_LP64_OFF64_CFLAGS,
 584                 _CS_POSIX_V6_LP64_OFF64_LDFLAGS,
 585                 _CS_POSIX_V6_LP64_OFF64_LIBS,
 586                 _CS_POSIX_V6_LP64_OFF64_LINTFLAGS,
 587                 _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS,
 588                 _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS,
 589                 _CS_POSIX_V6_LPBIG_OFFBIG_LIBS,
 590                 _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS
 591         }
 592
 593         [Map]
 594         public enum LockFlags : int {
 595                 F_ULOCK = 0, // Unlock a previously locked region.
 596                 F_LOCK  = 1, // Lock a region for exclusive use.
 597                 F_TLOCK = 2, // Test and lock a region for exclusive use.
 598                 F_TEST  = 3, // Test a region for other process locks.
 599         }
 600
 601         [Map][Flags]
 602         public enum PollEvents : short {
 603                 POLLIN      = 0x0001, // There is data to read
 604                 POLLPRI     = 0x0002, // There is urgent data to read
 605                 POLLOUT     = 0x0004, // Writing now will not block
 606                 POLLERR     = 0x0008, // Error condition
 607                 POLLHUP     = 0x0010, // Hung up
 608                 POLLNVAL    = 0x0020, // Invalid request; fd not open
 609                 // XPG4.2 definitions (via _XOPEN_SOURCE)
 610                 POLLRDNORM  = 0x0040, // Normal data bay be read
 611                 POLLRDBAND  = 0x0080, // Priority data may be read
 612                 POLLWRNORM  = 0x0100, // Writing now will not block
 613                 POLLWRBAND  = 0x0200, // Priority data may be written
 614         }
 615
 616         #endregion
 617
 618         #region Structures
 619
 620         public struct Flock {
 621                 public LockType         l_type;    // Type of lock: F_RDLCK, F_WRLCK, F_UNLCK
 622                 public SeekFlags        l_whence;  // How to interpret l_start
 623                 public /* off_t */ long l_start;   // Starting offset for lock
 624                 public /* off_t */ long l_len;     // Number of bytes to lock
 625                 public /* pid_t */ int  l_pid;     // PID of process blocking our lock (F_GETLK only)
 626         }
 627
 628         [StructLayout(LayoutKind.Sequential)]
 629         public struct Pollfd {
 630                 public int fd;
 631                 public PollEvents events;
 632                 public PollEvents revents;
 633         }
 634
 635         public struct Stat {
 636                 public  /* dev_t */     ulong   st_dev;     // device
 637                 public  /* ino_t */     ulong   st_ino;     // inode
 638                 public  FilePermissions         st_mode;    // protection
 639                 private uint                    _padding_;  // padding for structure alignment
 640                 public  /* nlink_t */   ulong   st_nlink;   // number of hard links
 641                 public  /* uid_t */     uint    st_uid;     // user ID of owner
 642                 public  /* gid_t */     uint    st_gid;     // group ID of owner
 643                 public  /* dev_t */     ulong   st_rdev;    // device type (if inode device)
 644                 public  /* off_t */     long    st_size;    // total size, in bytes
 645                 public  /* blksize_t */ long    st_blksize; // blocksize for filesystem I/O
 646                 public  /* blkcnt_t */  long    st_blocks;  // number of blocks allocated
 647                 public  /* time_t */    long    st_atime;   // time of last access
 648                 public  /* time_t */    long    st_mtime;   // time of last modification
 649                 public  /* time_t */    long    st_ctime;   // time of last status change
 650         }
 651
 652         public struct Statvfs {
 653                 public                  ulong f_bsize;    // file system block size
 654                 public                  ulong f_frsize;   // fragment size
 655                 public /* fsblkcnt_t */ ulong f_blocks;   // size of fs in f_frsize units
 656                 public /* fsblkcnt_t */ ulong f_bfree;    // # free blocks
 657                 public /* fsblkcnt_t */ ulong f_bavail;   // # free blocks for non-root
 658                 public /* fsfilcnt_t */ ulong f_files;    // # inodes
 659                 public /* fsfilcnt_t */ ulong f_ffree;    // # free inodes
 660                 public /* fsfilcnt_t */ ulong f_favail;   // # free inodes for non-root
 661                 public                  ulong f_fsid;     // file system id
 662                 public                  ulong f_flag;     // mount flags
 663                 public                  ulong f_namemax;  // maximum filename length
 664         }
 665
 666         public struct Timeval {
 667                 public  /* time_t */      long    tv_sec;   // seconds
 668                 public  /* suseconds_t */ long    tv_usec;  // microseconds
 669         }
 670
 671         public struct Timezone {
 672                 public  int tz_minuteswest; // minutes W of Greenwich
 673                 private int tz_dsttime;     // type of dst correction (OBSOLETE)
 674         }
 675
 676         public struct Utimbuf {
 677                 public  /* time_t */      long    actime;   // access time
 678                 public  /* time_t */      long    modtime;  // modification time
 679         }
 680
 681         #endregion
 682
 683         #region Classes
 684
 685         public sealed class Dirent
 686         {
 687                 public /* ino_t */ ulong  d_ino;
 688                 public /* off_t */ long   d_off;
 689                 public ushort             d_reclen;
 690                 public byte               d_type;
 691                 public string             d_name;
 692
 693                 public override int GetHashCode ()
 694                 {
 695                         return d_ino.GetHashCode () ^ d_off.GetHashCode () ^
 696                                 d_reclen.GetHashCode () ^ d_type.GetHashCode () ^
 697                                 d_name.GetHashCode ();
 698                 }
 699
 700                 public override bool Equals (object obj)
 701                 {
 702                         if (obj == null || GetType() != obj.GetType())
 703                                 return false;
 704                         Dirent d = (Dirent) obj;
 705                         return d.d_ino == d_ino && d.d_off == d_off &&
 706                                 d.d_reclen == d_reclen && d.d_type == d_type &&
 707                                 d.d_name == d_name;
 708                 }
 709
 710                 public override string ToString ()
 711                 {
 712                         return d_name;
 713                 }
 714
 715                 public static bool operator== (Dirent lhs, Dirent rhs)
 716                 {
 717                         return Object.Equals (lhs, rhs);
 718                 }
 719
 720                 public static bool operator!= (Dirent lhs, Dirent rhs)
 721                 {
 722                         return !Object.Equals (lhs, rhs);
 723                 }
 724         }
 725
 726         public sealed class Fstab
 727         {
 728                 public string fs_spec;
 729                 public string fs_file;
 730                 public string fs_vfstype;
 731                 public string fs_mntops;
 732                 public string fs_type;
 733                 public int    fs_freq;
 734                 public int    fs_passno;
 735
 736                 public override int GetHashCode ()
 737                 {
 738                         return fs_spec.GetHashCode () ^ fs_file.GetHashCode () ^
 739                                 fs_vfstype.GetHashCode () ^ fs_mntops.GetHashCode () ^
 740                                 fs_type.GetHashCode () ^ fs_freq ^ fs_passno;
 741                 }
 742
 743                 public override bool Equals (object obj)
 744                 {
 745                         if (obj == null || GetType() != obj.GetType())
 746                                 return false;
 747                         Fstab  f = (Fstab) obj;
 748                         return f.fs_spec == fs_spec && f.fs_file == fs_file &&
 749                                 f.fs_vfstype == fs_vfstype && f.fs_mntops == fs_mntops &&
 750                                 f.fs_type == fs_type && f.fs_freq == fs_freq &&
 751                                 f.fs_passno == fs_passno;
 752                 }
 753
 754                 public override string ToString ()
 755                 {
 756                         return fs_spec;
 757                 }
 758
 759                 public static bool operator== (Fstab lhs, Fstab rhs)
 760                 {
 761                         return Object.Equals (lhs, rhs);
 762                 }
 763
 764                 public static bool operator!= (Fstab lhs, Fstab rhs)
 765                 {
 766                         return !Object.Equals (lhs, rhs);
 767                 }
 768         }
 769
 770         public sealed class Group
 771         {
 772                 public string           gr_name;
 773                 public string           gr_passwd;
 774                 public /* gid_t */ uint gr_gid;
 775                 public string[]         gr_mem;
 776
 777                 public override int GetHashCode ()
 778                 {
 779                         int memhc = 0;
 780                         for (int i = 0; i < gr_mem.Length; ++i)
 781                                 memhc ^= gr_mem[i].GetHashCode ();
 782
 783                         return gr_name.GetHashCode () ^ gr_passwd.GetHashCode () ^
 784                                 gr_gid.GetHashCode () ^ memhc;
 785                 }
 786
 787                 public override bool Equals (object obj)
 788                 {
 789                         if (obj == null || GetType() != obj.GetType())
 790                                 return false;
 791                         Group g = (Group) obj;
 792                         if (g.gr_gid != gr_gid)
 793                                 return false;
 794                         if (g.gr_gid == gr_gid && g.gr_name == gr_name &&
 795                                 g.gr_passwd == gr_passwd) {
 796                                 if (g.gr_mem == gr_mem)
 797                                         return true;
 798                                 if (g.gr_mem == null || gr_mem == null)
 799                                         return false;
 800                                 if (g.gr_mem.Length != gr_mem.Length)
 801                                         return false;
 802                                 for (int i = 0; i < gr_mem.Length; ++i)
 803                                         if (gr_mem[i] != g.gr_mem[i])
 804                                                 return false;
 805                                 return true;
 806                         }
 807                         return false;
 808                 }
 809
 810                 // Generate string in /etc/group format
 811                 public override string ToString ()
 812                 {
 813                         StringBuilder sb = new StringBuilder ();
 814                         sb.AppendFormat ("{0}:{1}:{2}:", gr_name, gr_passwd, gr_gid);
 815                         GetMembers (sb, gr_mem);
 816                         return sb.ToString ();
 817                 }
 818
 819                 private static void GetMembers (StringBuilder sb, string[] members)
 820                 {
 821                         if (members.Length > 0)
 822                                 sb.Append (members[0]);
 823                         for (int i = 1; i < members.Length; ++i) {
 824                                 sb.Append (",");
 825                                 sb.Append (members[i]);
 826                         }
 827                 }
 828
 829                 public static bool operator== (Group lhs, Group rhs)
 830                 {
 831                         return Object.Equals (lhs, rhs);
 832                 }
 833
 834                 public static bool operator!= (Group lhs, Group rhs)
 835                 {
 836                         return !Object.Equals (lhs, rhs);
 837                 }
 838         }
 839
 840         public sealed class Passwd
 841         {
 842                 public string           pw_name;
 843                 public string           pw_passwd;
 844                 public /* uid_t */ uint pw_uid;
 845                 public /* gid_t */ uint pw_gid;
 846                 public string           pw_gecos;
 847                 public string           pw_dir;
 848                 public string           pw_shell;
 849
 850                 public override int GetHashCode ()
 851                 {
 852                         return pw_name.GetHashCode () ^ pw_passwd.GetHashCode () ^
 853                                 pw_uid.GetHashCode () ^ pw_gid.GetHashCode () ^
 854                                 pw_gecos.GetHashCode () ^ pw_dir.GetHashCode () ^
 855                                 pw_dir.GetHashCode () ^ pw_shell.GetHashCode ();
 856                 }
 857
 858                 public override bool Equals (object obj)
 859                 {
 860                         if (obj == null || GetType() != obj.GetType())
 861                                 return false;
 862                         Passwd p = (Passwd) obj;
 863                         return p.pw_uid == pw_uid && p.pw_gid == pw_gid && p.pw_name == pw_name &&
 864                                 p.pw_passwd == pw_passwd && p.pw_gecos == pw_gecos &&
 865                                 p.pw_dir == pw_dir && p.pw_shell == pw_shell;
 866                 }
 867
 868                 // Generate string in /etc/passwd format
 869                 public override string ToString ()
 870                 {
 871                         return string.Format ("{0}:{1}:{2}:{3}:{4}:{5}:{6}",
 872                                 pw_name, pw_passwd, pw_uid, pw_gid, pw_gecos, pw_dir, pw_shell);
 873                 }
 874
 875                 public static bool operator== (Passwd lhs, Passwd rhs)
 876                 {
 877                         return Object.Equals (lhs, rhs);
 878                 }
 879
 880                 public static bool operator!= (Passwd lhs, Passwd rhs)
 881                 {
 882                         return !Object.Equals (lhs, rhs);
 883                 }
 884         }
 885
 886         //
 887         // Convention: Functions *not* part of the standard C library AND part of
 888         // a POSIX and/or Unix standard (X/Open, SUS, XPG, etc.) go here.
 889         //
 890         // For example, the man page should be similar to:
 891         //
 892         //    CONFORMING TO (or CONFORMS TO)
 893         //           XPG2, SUSv2, POSIX, etc.
 894         //
 895         // BSD- and GNU-specific exports can also be placed here.
 896         //
 897         // The only methods in here should be:
 898         //  (1) low-level functions
 899         //  (2) "Trivial" function overloads.  For example, if the parameters to a
 900         //      function are related (e.g. getgroups(2))
 901         //  (3) The return type SHOULD NOT be changed.  If you want to provide a
 902         //      convenience function with a nicer return type, place it into one of
 903         //      the Unix* wrapper classes, and give it a .NET-styled name.
 904         //  (4) Exceptions SHOULD NOT be thrown.  EXCEPTIONS:
 905         //      - If you're wrapping *broken* methods which make assumptions about
 906         //        input data, such as that an argument refers to N bytes of data.
 907         //        This is currently limited to cuserid(3) and encrypt(3).
 908         //      - If you call functions which themselves generate exceptions.
 909         //        This is the case for using UnixConvert, which will throw an
 910         //        exception if an invalid/unsupported value is used.
 911         //
 912         public sealed class Syscall : Stdlib
 913         {
 914                 new internal const string LIBC  = "libc";
 915                     private  const string CRYPT = "crypt";
 916
 917                 private Syscall () {}
 918
 919                 //
 920                 // <aio.h>
 921                 //
 922
 923                 // TODO: aio_cancel(3), aio_error(3), aio_fsync(3), aio_read(3),
 924                 // aio_return(3), aio_suspend(3), aio_write(3)
 925                 //
 926                 // Then update UnixStream.BeginRead to use the aio* functions.
 927
 928                 #region <dirent.h> Declarations
 929                 //
 930                 // <dirent.h>
 931                 //
 932                 // TODO: scandir(3), alphasort(3), versionsort(3), getdirentries(3)
 933
 934                 [DllImport (LIBC, SetLastError=true)]
 935                 public static extern IntPtr opendir (string name);
 936
 937                 [DllImport (LIBC, SetLastError=true)]
 938                 public static extern int closedir (IntPtr dir);
 939
 940                 // seekdir(3):
 941                 //    void seekdir (DIR *dir, off_t offset);
 942                 //    Slight modification.  Returns -1 on error, 0 on success.
 943                 [DllImport (MPH, SetLastError=true,
 944                                 EntryPoint="Mono_Posix_Syscall_seekdir")]
 945                 public static extern int seekdir (IntPtr dir, long offset);
 946
 947                 // telldir(3)
 948                 //    off_t telldir(DIR *dir);
 949                 [DllImport (MPH, SetLastError=true,
 950                                 EntryPoint="Mono_Posix_Syscall_telldir")]
 951                 public static extern long telldir (IntPtr dir);
 952
 953                 [DllImport (LIBC, SetLastError=true)]
 954                 public static extern void rewinddir (IntPtr dir);
 955
 956                 private struct _Dirent {
 957                         public /* ino_t */ ulong  d_ino;
 958                         public /* off_t */ long   d_off;
 959                         public ushort             d_reclen;
 960                         public byte               d_type;
 961                         public IntPtr             d_name;
 962                 }
 963
 964                 private static void CopyDirent (Dirent to, ref _Dirent from)
 965                 {
 966                         try {
 967                                 to.d_ino    = from.d_ino;
 968                                 to.d_off    = from.d_off;
 969                                 to.d_reclen = from.d_reclen;
 970                                 to.d_type   = from.d_type;
 971                                 to.d_name   = UnixMarshal.PtrToString (from.d_name);
 972                         }
 973                         finally {
 974                                 Stdlib.free (from.d_name);
 975                                 from.d_name = IntPtr.Zero;
 976                         }
 977                 }
 978
 979                 [DllImport (MPH, SetLastError=true,
 980                                 EntryPoint="Mono_Posix_Syscall_readdir")]
 981                 private static extern int sys_readdir (IntPtr dir, out _Dirent dentry);
 982
 983                 public static Dirent readdir (IntPtr dir)
 984                 {
 985                         _Dirent dentry;
 986                         int r = sys_readdir (dir, out dentry);
 987                         if (r != 0)
 988                                 return null;
 989                         Dirent d = new Dirent ();
 990                         CopyDirent (d, ref dentry);
 991                         return d;
 992                 }
 993
 994                 [DllImport (MPH, SetLastError=true,
 995                                 EntryPoint="Mono_Posix_Syscall_readdir_r")]
 996                 private static extern int sys_readdir_r (IntPtr dirp, out _Dirent entry, out IntPtr result);
 997
 998                 public static int readdir_r (IntPtr dirp, Dirent entry, out IntPtr result)
 999                 {
1000                         entry.d_ino    = 0;
1001                         entry.d_off    = 0;
1002                         entry.d_reclen = 0;
1003                         entry.d_type   = 0;
1004                         entry.d_name   = null;
1005
1006                         _Dirent _d;
1007                         int r = sys_readdir_r (dirp, out _d, out result);
1008
1009                         if (r == 0 && result != IntPtr.Zero) {
1010                                 CopyDirent (entry, ref _d);
1011                         }
1012
1013                         return r;
1014                 }
1015
1016                 [DllImport (LIBC, SetLastError=true)]
1017                 public static extern int dirfd (IntPtr dir);
1018                 #endregion
1019
1020                 #region <fcntl.h> Declarations
1021                 //
1022                 // <fcntl.h> -- COMPLETE
1023                 //
1024
1025                 [DllImport (MPH, SetLastError=true,
1026                                 EntryPoint="Mono_Posix_Syscall_fcntl")]
1027                 public static extern int fcntl (int fd, FcntlCommand cmd);
1028
1029                 [DllImport (MPH, SetLastError=true,
1030                                 EntryPoint="Mono_Posix_Syscall_fcntl_arg")]
1031                 public static extern int fcntl (int fd, FcntlCommand cmd, long arg);
1032
1033                 [DllImport (MPH, SetLastError=true,
1034                                 EntryPoint="Mono_Posix_Syscall_fcntl_lock")]
1035                 public static extern int fcntl (int fd, FcntlCommand cmd, ref Flock @lock);
1036
1037                 [DllImport (MPH, SetLastError=true,
1038                                 EntryPoint="Mono_Posix_Syscall_open")]
1039                 public static extern int open (string pathname, OpenFlags flags);
1040
1041                 // open(2)
1042                 //    int open(const char *pathname, int flags, mode_t mode);
1043                 [DllImport (MPH, SetLastError=true,
1044                                 EntryPoint="Mono_Posix_Syscall_open_mode")]
1045                 public static extern int open (string pathname, OpenFlags flags, FilePermissions mode);
1046
1047                 // creat(2)
1048                 //    int creat(const char *pathname, mode_t mode);
1049                 [DllImport (MPH, SetLastError=true,
1050                                 EntryPoint="Mono_Posix_Syscall_creat")]
1051                 public static extern int creat (string pathname, FilePermissions mode);
1052
1053                 // posix_fadvise(2)
1054                 //    int posix_fadvise(int fd, off_t offset, off_t len, int advice);
1055                 [DllImport (MPH, SetLastError=true,
1056                                 EntryPoint="Mono_Posix_Syscall_posix_fadvise")]
1057                 public static extern int posix_fadvise (int fd, long offset,
1058                         long len, PosixFadviseAdvice advice);
1059
1060                 // posix_fallocate(P)
1061                 //    int posix_fallocate(int fd, off_t offset, size_t len);
1062                 [DllImport (MPH, SetLastError=true,
1063                                 EntryPoint="Mono_Posix_Syscall_posix_fallocate")]
1064                 public static extern int posix_fallocate (int fd, long offset, long len);
1065                 #endregion
1066
1067                 #region <fstab.h> Declarations
1068                 //
1069                 // <fstab.h>  -- COMPLETE
1070                 //
1071                 private struct _Fstab {
1072                         public IntPtr fs_spec;
1073                         public IntPtr fs_file;
1074                         public IntPtr fs_vfstype;
1075                         public IntPtr fs_mntops;
1076                         public IntPtr fs_type;
1077                         public int    fs_freq;
1078                         public int    fs_passno;
1079                         public IntPtr _fs_buf_;
1080                 }
1081
1082                 private static void CopyFstab (Fstab to, ref _Fstab from)
1083                 {
1084                         try {
1085                                 to.fs_spec     = UnixMarshal.PtrToString (from.fs_spec);
1086                                 to.fs_file     = UnixMarshal.PtrToString (from.fs_file);
1087                                 to.fs_vfstype  = UnixMarshal.PtrToString (from.fs_vfstype);
1088                                 to.fs_mntops   = UnixMarshal.PtrToString (from.fs_mntops);
1089                                 to.fs_type     = UnixMarshal.PtrToString (from.fs_type);
1090                                 to.fs_freq     = from.fs_freq;
1091                                 to.fs_passno   = from.fs_passno;
1092                         }
1093                         finally {
1094                                 Stdlib.free (from._fs_buf_);
1095                                 from._fs_buf_ = IntPtr.Zero;
1096                         }
1097                 }
1098
1099                 [DllImport (MPH, SetLastError=true,
1100                                 EntryPoint="Mono_Posix_Syscall_endfsent")]
1101                 public static extern void endfsent ();
1102
1103                 [DllImport (MPH, SetLastError=true,
1104                                 EntryPoint="Mono_Posix_Syscall_getfsent")]
1105                 private static extern int sys_getfsent (out _Fstab fs);
1106
1107                 public static Fstab getfsent ()
1108                 {
1109                         _Fstab fsbuf;
1110                         int r = sys_getfsent (out fsbuf);
1111                         if (r != 0)
1112                                 return null;
1113                         Fstab fs = new Fstab ();
1114                         CopyFstab (fs, ref fsbuf);
1115                         return fs;
1116                 }
1117
1118                 [DllImport (MPH, SetLastError=true,
1119                                 EntryPoint="Mono_Posix_Syscall_getfsfile")]
1120                 private static extern int sys_getfsfile (string mount_point, out _Fstab fs);
1121
1122                 public static Fstab getfsfile (string mount_point)
1123                 {
1124                         _Fstab fsbuf;
1125                         int r = sys_getfsfile (mount_point, out fsbuf);
1126                         if (r != 0)
1127                                 return null;
1128                         Fstab fs = new Fstab ();
1129                         CopyFstab (fs, ref fsbuf);
1130                         return fs;
1131                 }
1132
1133                 [DllImport (MPH, SetLastError=true,
1134                                 EntryPoint="Mono_Posix_Syscall_getfsspec")]
1135                 private static extern int sys_getfsspec (string special_file, out _Fstab fs);
1136
1137                 public static Fstab getfsspec (string special_file)
1138                 {
1139                         _Fstab fsbuf;
1140                         int r = sys_getfsspec (special_file, out fsbuf);
1141                         if (r != 0)
1142                                 return null;
1143                         Fstab fs = new Fstab ();
1144                         CopyFstab (fs, ref fsbuf);
1145                         return fs;
1146                 }
1147
1148                 [DllImport (MPH, SetLastError=true,
1149                                 EntryPoint="Mono_Posix_Syscall_setfsent")]
1150                 public static extern int setfsent ();
1151
1152                 #endregion
1153
1154                 #region <grp.h> Declarations
1155                 //
1156                 // <grp.h>
1157                 //
1158                 // TODO: putgrent(3), fgetgrent_r(), getgrouplist(2), initgroups(3)
1159
1160                 // setgroups(2)
1161                 //    int setgroups (size_t size, const gid_t *list);
1162                 [DllImport (MPH, SetLastError=true,
1163                                 EntryPoint="Mono_Posix_Syscall_setgroups")]
1164                 public static extern int setgroups (ulong size, uint[] list);
1165
1166                 public static int setgroups (uint [] list)
1167                 {
1168                         return setgroups ((ulong) list.Length, list);
1169                 }
1170
1171                 private struct _Group
1172                 {
1173                         public IntPtr           gr_name;
1174                         public IntPtr           gr_passwd;
1175                         public /* gid_t */ uint gr_gid;
1176                         public int              _gr_nmem_;
1177                         public IntPtr           gr_mem;
1178                         public IntPtr           _gr_buf_;
1179                 }
1180
1181                 private static void CopyGroup (Group to, ref _Group from)
1182                 {
1183                         try {
1184                                 to.gr_gid    = from.gr_gid;
1185                                 to.gr_name   = UnixMarshal.PtrToString (from.gr_name);
1186                                 to.gr_passwd = UnixMarshal.PtrToString (from.gr_passwd);
1187                                 to.gr_mem    = UnixMarshal.PtrToStringArray (from._gr_nmem_, from.gr_mem);
1188                         }
1189                         finally {
1190                                 Stdlib.free (from.gr_mem);
1191                                 Stdlib.free (from._gr_buf_);
1192                                 from.gr_mem   = IntPtr.Zero;
1193                                 from._gr_buf_ = IntPtr.Zero;
1194                         }
1195                 }
1196
1197                 [DllImport (MPH, SetLastError=true,
1198                                 EntryPoint="Mono_Posix_Syscall_getgrnam")]
1199                 private static extern int sys_getgrnam (string name, out _Group group);
1200
1201                 public static Group getgrnam (string name)
1202                 {
1203                         _Group group;
1204                         int r = sys_getgrnam (name, out group);
1205                         if (r != 0)
1206                                 return null;
1207                         Group gr = new Group ();
1208                         CopyGroup (gr, ref group);
1209                         return gr;
1210                 }
1211
1212                 // getgrgid(3)
1213                 //    struct group *getgrgid(gid_t gid);
1214                 [DllImport (MPH, SetLastError=true,
1215                                 EntryPoint="Mono_Posix_Syscall_getgrgid")]
1216                 private static extern int sys_getgrgid (uint uid, out _Group group);
1217
1218                 public static Group getgrgid (uint uid)
1219                 {
1220                         _Group group;
1221                         int r = sys_getgrgid (uid, out group);
1222                         if (r != 0)
1223                                 return null;
1224                         Group gr = new Group ();
1225                         CopyGroup (gr, ref group);
1226                         return gr;
1227                 }
1228
1229                 [DllImport (MPH, SetLastError=true,
1230                                 EntryPoint="Mono_Posix_Syscall_getgrnam_r")]
1231                 private static extern int sys_getgrnam_r (string name, out _Group grbuf, out IntPtr grbufp);
1232
1233                 public static int getgrnam_r (string name, Group grbuf, out Group grbufp)
1234                 {
1235                         grbufp = null;
1236                         _Group group;
1237                         IntPtr _grbufp;
1238                         int r = sys_getgrnam_r (name, out group, out _grbufp);
1239                         if (r == 0 && _grbufp != IntPtr.Zero) {
1240                                 CopyGroup (grbuf, ref group);
1241                                 grbufp = grbuf;
1242                         }
1243                         return r;
1244                 }
1245
1246                 // getgrgid_r(3)
1247                 //    int getgrgid_r(gid_t gid, struct group *gbuf, char *buf,
1248                 //        size_t buflen, struct group **gbufp);
1249                 [DllImport (MPH, SetLastError=true,
1250                                 EntryPoint="Mono_Posix_Syscall_getgrgid_r")]
1251                 private static extern int sys_getgrgid_r (uint uid, out _Group grbuf, out IntPtr grbufp);
1252
1253                 public static int getgrgid_r (uint uid, Group grbuf, out Group grbufp)
1254                 {
1255                         grbufp = null;
1256                         _Group group;
1257                         IntPtr _grbufp;
1258                         int r = sys_getgrgid_r (uid, out group, out _grbufp);
1259                         if (r == 0 && _grbufp != IntPtr.Zero) {
1260                                 CopyGroup (grbuf, ref group);
1261                                 grbufp = grbuf;
1262                         }
1263                         return r;
1264                 }
1265
1266                 [DllImport (MPH, SetLastError=true,
1267                                 EntryPoint="Mono_Posix_Syscall_getgrent")]
1268                 private static extern int sys_getgrent (out _Group grbuf);
1269
1270                 public static Group getgrent ()
1271                 {
1272                         _Group group;
1273                         int r = sys_getgrent (out group);
1274                         if (r != 0)
1275                                 return null;
1276                         Group gr = new Group();
1277                         CopyGroup (gr, ref group);
1278                         return gr;
1279                 }
1280
1281                 [DllImport (LIBC, SetLastError=true)]
1282                 public static extern void setgrent ();
1283
1284                 [DllImport (LIBC, SetLastError=true)]
1285                 public static extern void endgrent ();
1286
1287                 [DllImport (MPH, SetLastError=true,
1288                                 EntryPoint="Mono_Posix_Syscall_fgetgrent")]
1289                 private static extern int sys_fgetgrent (IntPtr stream, out _Group grbuf);
1290
1291                 public static Group fgetgrent (IntPtr stream)
1292                 {
1293                         _Group group;
1294                         int r = sys_fgetgrent (stream, out group);
1295                         if (r != 0)
1296                                 return null;
1297                         Group gr = new Group ();
1298                         CopyGroup (gr, ref group);
1299                         return gr;
1300                 }
1301                 #endregion
1302
1303                 #region <pwd.h> Declarations
1304                 //
1305                 // <pwd.h>
1306                 //
1307                 // TODO: putpwent(3), fgetpwent_r()
1308                 //
1309                 // SKIPPING: getpw(3): it's dangerous.  Use getpwuid(3) instead.
1310
1311                 private struct _Passwd
1312                 {
1313                         public IntPtr           pw_name;
1314                         public IntPtr           pw_passwd;
1315                         public /* uid_t */ uint pw_uid;
1316                         public /* gid_t */ uint pw_gid;
1317                         public IntPtr           pw_gecos;
1318                         public IntPtr           pw_dir;
1319                         public IntPtr           pw_shell;
1320                         public IntPtr           _pw_buf_;
1321                 }
1322
1323                 private static void CopyPasswd (Passwd to, ref _Passwd from)
1324                 {
1325                         try {
1326                                 to.pw_name   = UnixMarshal.PtrToString (from.pw_name);
1327                                 to.pw_passwd = UnixMarshal.PtrToString (from.pw_passwd);
1328                                 to.pw_uid    = from.pw_uid;
1329                                 to.pw_gid    = from.pw_gid;
1330                                 to.pw_gecos  = UnixMarshal.PtrToString (from.pw_gecos);
1331                                 to.pw_dir    = UnixMarshal.PtrToString (from.pw_dir);
1332                                 to.pw_shell  = UnixMarshal.PtrToString (from.pw_shell);
1333                         }
1334                         finally {
1335                                 Stdlib.free (from._pw_buf_);
1336                                 from._pw_buf_ = IntPtr.Zero;
1337                         }
1338                 }
1339
1340                 [DllImport (MPH, SetLastError=true,
1341                                 EntryPoint="Mono_Posix_Syscall_getpwnam")]
1342                 private static extern int sys_getpwnam (string name, out _Passwd passwd);
1343
1344                 public static Passwd getpwnam (string name)
1345                 {
1346                         _Passwd passwd;
1347                         int r = sys_getpwnam (name, out passwd);
1348                         if (r != 0)
1349                                 return null;
1350                         Passwd pw = new Passwd ();
1351                         CopyPasswd (pw, ref passwd);
1352                         return pw;
1353                 }
1354
1355                 // getpwuid(3)
1356                 //    struct passwd *getpwnuid(uid_t uid);
1357                 [DllImport (MPH, SetLastError=true,
1358                                 EntryPoint="Mono_Posix_Syscall_getpwuid")]
1359                 private static extern int sys_getpwuid (uint uid, out _Passwd passwd);
1360
1361                 public static Passwd getpwuid (uint uid)
1362                 {
1363                         _Passwd passwd;
1364                         int r = sys_getpwuid (uid, out passwd);
1365                         if (r != 0)
1366                                 return null;
1367                         Passwd pw = new Passwd ();
1368                         CopyPasswd (pw, ref passwd);
1369                         return pw;
1370                 }
1371
1372                 [DllImport (MPH, SetLastError=true,
1373                                 EntryPoint="Mono_Posix_Syscall_getpwnam_r")]
1374                 private static extern int sys_getpwnam_r (string name, out _Passwd pwbuf, out IntPtr pwbufp);
1375
1376                 public static int getpwnam_r (string name, Passwd pwbuf, out Passwd pwbufp)
1377                 {
1378                         pwbufp = null;
1379                         _Passwd passwd;
1380                         IntPtr _pwbufp;
1381                         int r = sys_getpwnam_r (name, out passwd, out _pwbufp);
1382                         if (r == 0 && _pwbufp != IntPtr.Zero) {
1383                                 CopyPasswd (pwbuf, ref passwd);
1384                                 pwbufp = pwbuf;
1385                         }
1386                         return r;
1387                 }
1388
1389                 // getpwuid_r(3)
1390                 //    int getpwuid_r(uid_t uid, struct passwd *pwbuf, char *buf, size_t
1391                 //        buflen, struct passwd **pwbufp);
1392                 [DllImport (MPH, SetLastError=true,
1393                                 EntryPoint="Mono_Posix_Syscall_getpwuid_r")]
1394                 private static extern int sys_getpwuid_r (uint uid, out _Passwd pwbuf, out IntPtr pwbufp);
1395
1396                 public static int getpwuid_r (uint uid, Passwd pwbuf, out Passwd pwbufp)
1397                 {
1398                         pwbufp = null;
1399                         _Passwd passwd;
1400                         IntPtr _pwbufp;
1401                         int r = sys_getpwuid_r (uid, out passwd, out _pwbufp);
1402                         if (r == 0 && _pwbufp != IntPtr.Zero) {
1403                                 CopyPasswd (pwbuf, ref passwd);
1404                                 pwbufp = pwbuf;
1405                         }
1406                         return r;
1407                 }
1408
1409                 [DllImport (MPH, SetLastError=true,
1410                                 EntryPoint="Mono_Posix_Syscall_getpwent")]
1411                 private static extern int sys_getpwent (out _Passwd pwbuf);
1412
1413                 public static Passwd getpwent ()
1414                 {
1415                         _Passwd passwd;
1416                         int r = sys_getpwent (out passwd);
1417                         if (r != 0)
1418                                 return null;
1419                         Passwd pw = new Passwd ();
1420                         CopyPasswd (pw, ref passwd);
1421                         return pw;
1422                 }
1423
1424                 [DllImport (LIBC, SetLastError=true)]
1425                 public static extern void setpwent ();
1426
1427                 [DllImport (LIBC, SetLastError=true)]
1428                 public static extern void endpwent ();
1429
1430                 [DllImport (MPH, SetLastError=true,
1431                                 EntryPoint="Mono_Posix_Syscall_fgetpwent")]
1432                 private static extern int sys_fgetpwent (IntPtr stream, out _Passwd pwbuf);
1433
1434                 public static Passwd fgetpwent (IntPtr stream)
1435                 {
1436                         _Passwd passwd;
1437                         int r = sys_fgetpwent (stream, out passwd);
1438                         if (r != 0)
1439                                 return null;
1440                         Passwd pw = new Passwd ();
1441                         CopyPasswd (pw, ref passwd);
1442                         return pw;
1443                 }
1444                 #endregion
1445
1446                 #region <signal.h> Declarations
1447                 //
1448                 // <signal.h>
1449                 //
1450                 [DllImport (LIBC, SetLastError=true)]
1451                 private static extern void psignal (int sig, string s);
1452
1453                 public static void psignal (Signum sig, string s)
1454                 {
1455                         int signum = UnixConvert.FromSignum (sig);
1456                         psignal (signum, s);
1457                 }
1458
1459                 // kill(2)
1460                 //    int kill(pid_t pid, int sig);
1461                 [DllImport (LIBC, SetLastError=true, EntryPoint="kill")]
1462                 private static extern int sys_kill (int pid, int sig);
1463
1464                 public static int kill (int pid, Signum sig)
1465                 {
1466                         int _sig = UnixConvert.FromSignum (sig);
1467                         return sys_kill (pid, _sig);
1468                 }
1469
1470                 [DllImport (LIBC, SetLastError=true, EntryPoint="strsignal")]
1471                 private static extern IntPtr sys_strsignal (int sig);
1472
1473                 public static string strsignal (Signum sig)
1474                 {
1475                         int s = UnixConvert.FromSignum (sig);
1476                         IntPtr r = sys_strsignal (s);
1477                         return UnixMarshal.PtrToString (r);
1478                 }
1479
1480                 // TODO: sigaction(2)
1481                 // TODO: sigsuspend(2)
1482                 // TODO: sigpending(2)
1483
1484                 #endregion
1485
1486                 #region <stdio.h> Declarations
1487                 //
1488                 // <stdio.h>
1489                 //
1490                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_L_ctermid")]
1491                 private static extern int _L_ctermid ();
1492
1493                 public static readonly int L_ctermid = _L_ctermid ();
1494
1495                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_L_cuserid")]
1496                 private static extern int _L_cuserid ();
1497
1498                 public static readonly int L_cuserid = _L_cuserid ();
1499
1500                 [DllImport (LIBC, SetLastError=true, EntryPoint="cuserid")]
1501                 private static extern IntPtr sys_cuserid ([Out] StringBuilder @string);
1502
1503                 [Obsolete ("\"Nobody knows precisely what cuserid() does... " +
1504                                 "DO NOT USE cuserid().\n" +
1505                                 "`string' must hold L_cuserid characters.  Use getlogin_r instead.")]
1506                 public static string cuserid (StringBuilder @string)
1507                 {
1508                         if (@string.Capacity < L_cuserid) {
1509                                 throw new ArgumentOutOfRangeException ("string", "string.Capacity < L_cuserid");
1510                         }
1511                         IntPtr r = sys_cuserid (@string);
1512                         return UnixMarshal.PtrToString (r);
1513                 }
1514
1515                 #endregion
1516
1517                 #region <stdlib.h> Declarations
1518                 //
1519                 // <stdlib.h>
1520                 //
1521                 [DllImport (LIBC, SetLastError=true)]
1522                 public static extern int ttyslot ();
1523
1524                 [DllImport (CRYPT, SetLastError=true)]
1525                 public static extern void setkey (string key);
1526
1527                 #endregion
1528
1529                 #region <string.h> Declarations
1530                 //
1531                 // <string.h>
1532                 //
1533
1534                 // strerror_r(3)
1535                 //    int strerror_r(int errnum, char *buf, size_t n);
1536                 [DllImport (MPH, SetLastError=true,
1537                                 EntryPoint="Mono_Posix_Syscall_strerror_r")]
1538                 private static extern int sys_strerror_r (int errnum,
1539                                 [Out] StringBuilder buf, ulong n);
1540
1541                 public static int strerror_r (Error errnum, StringBuilder buf, ulong n)
1542                 {
1543                         int e = UnixConvert.FromError (errnum);
1544                         return sys_strerror_r (e, buf, n);
1545                 }
1546
1547                 public static int strerror_r (Error errnum, StringBuilder buf)
1548                 {
1549                         return strerror_r (errnum, buf, (ulong) buf.Capacity);
1550                 }
1551
1552                 #endregion
1553
1554                 #region <sys/mman.h> Declarations
1555                 //
1556                 // <sys/mman.h>
1557                 //
1558
1559                 // posix_madvise(P)
1560                 //    int posix_madvise(void *addr, size_t len, int advice);
1561                 [DllImport (MPH, SetLastError=true,
1562                                 EntryPoint="Mono_Posix_Syscall_posix_madvise")]
1563                 public static extern int posix_madvise (IntPtr addr, ulong len,
1564                         PosixMadviseAdvice advice);
1565
1566                 #endregion
1567
1568                 #region <sys/poll.h> Declarations
1569                 //
1570                 // <sys/poll.h> -- COMPLETE
1571                 //
1572
1573                 private struct _pollfd {
1574                         public int fd;
1575                         public short events;
1576                         public short revents;
1577                 }
1578
1579                 [DllImport (LIBC, SetLastError=true, EntryPoint="poll")]
1580                 private static extern int sys_poll (_pollfd[] ufds, uint nfds, int timeout);
1581
1582                 public static int poll (Pollfd [] fds, uint nfds, int timeout)
1583                 {
1584                         if (fds.Length < nfds)
1585                                 throw new ArgumentOutOfRangeException ("fds", "Must refer to at least `nfds' elements");
1586
1587                         _pollfd[] send = new _pollfd[nfds];
1588
1589                         for (int i = 0; i < send.Length; i++) {
1590                                 send [i].fd     = fds [i].fd;
1591                                 send [i].events = UnixConvert.FromPollEvents (fds [i].events);
1592                         }
1593
1594                         int r = sys_poll (send, nfds, timeout);
1595
1596                         for (int i = 0; i < send.Length; i++) {
1597                                 fds [i].revents = UnixConvert.ToPollEvents (send [i].revents);
1598                         }
1599
1600                         return r;
1601                 }
1602
1603                 public static int poll (Pollfd [] fds, int timeout)
1604                 {
1605                         return poll (fds, (uint) fds.Length, timeout);
1606                 }
1607
1608                 //
1609                 // <sys/ptrace.h>
1610                 //
1611
1612                 // TODO: ptrace(2)
1613
1614                 //
1615                 // <sys/resource.h>
1616                 //
1617
1618                 // TODO: setrlimit(2)
1619                 // TODO: getrlimit(2)
1620                 // TODO: getrusage(2)
1621
1622                 #endregion
1623
1624                 #region <sys/sendfile.h> Declarations
1625                 //
1626                 // <sys/sendfile.h> -- COMPLETE
1627                 //
1628
1629                 [DllImport (MPH, SetLastError=true,
1630                                 EntryPoint="Mono_Posix_Syscall_sendfile")]
1631                 public static extern long sendfile (int out_fd, int in_fd,
1632                                 ref long offset, ulong count);
1633
1634                 #endregion
1635
1636                 #region <sys/stat.h> Declarations
1637                 //
1638                 // <sys/stat.h>  -- COMPLETE
1639                 //
1640                 [DllImport (MPH, SetLastError=true,
1641                                 EntryPoint="Mono_Posix_Syscall_stat")]
1642                 public static extern int stat (string file_name, out Stat buf);
1643
1644                 [DllImport (MPH, SetLastError=true,
1645                                 EntryPoint="Mono_Posix_Syscall_fstat")]
1646                 public static extern int fstat (int filedes, out Stat buf);
1647
1648                 [DllImport (MPH, SetLastError=true,
1649                                 EntryPoint="Mono_Posix_Syscall_lstat")]
1650                 public static extern int lstat (string file_name, out Stat buf);
1651
1652                 // TODO:
1653                 // S_ISDIR, S_ISCHR, S_ISBLK, S_ISREG, S_ISFIFO, S_ISLNK, S_ISSOCK
1654                 // All take FilePermissions
1655
1656                 // chmod(2)
1657                 //    int chmod(const char *path, mode_t mode);
1658                 [DllImport (LIBC, SetLastError=true, EntryPoint="chmod")]
1659                 private static extern int sys_chmod (string path, uint mode);
1660
1661                 public static int chmod (string path, FilePermissions mode)
1662                 {
1663                         uint _mode = UnixConvert.FromFilePermissions (mode);
1664                         return sys_chmod (path, _mode);
1665                 }
1666
1667                 // fchmod(2)
1668                 //    int chmod(int filedes, mode_t mode);
1669                 [DllImport (LIBC, SetLastError=true, EntryPoint="fchmod")]
1670                 private static extern int sys_fchmod (int filedes, uint mode);
1671
1672                 public static int fchmod (int filedes, FilePermissions mode)
1673                 {
1674                         uint _mode = UnixConvert.FromFilePermissions (mode);
1675                         return sys_fchmod (filedes, _mode);
1676                 }
1677
1678                 // umask(2)
1679                 //    mode_t umask(mode_t mask);
1680                 [DllImport (LIBC, SetLastError=true, EntryPoint="umask")]
1681                 private static extern uint sys_umask (uint mask);
1682
1683                 public static FilePermissions umask (FilePermissions mask)
1684                 {
1685                         uint _mask = UnixConvert.FromFilePermissions (mask);
1686                         uint r = sys_umask (_mask);
1687                         return UnixConvert.ToFilePermissions (r);
1688                 }
1689
1690                 // mkdir(2)
1691                 //    int mkdir(const char *pathname, mode_t mode);
1692                 [DllImport (LIBC, SetLastError=true, EntryPoint="mkdir")]
1693                 private static extern int sys_mkdir (string oldpath, uint mode);
1694
1695                 public static int mkdir (string oldpath, FilePermissions mode)
1696                 {
1697                         uint _mode = UnixConvert.FromFilePermissions (mode);
1698                         return sys_mkdir (oldpath, _mode);
1699                 }
1700
1701                 // mknod(2)
1702                 //    int mknod (const char *pathname, mode_t mode, dev_t dev);
1703                 [DllImport (MPH, SetLastError=true,
1704                                 EntryPoint="Mono_Posix_Syscall_mknod")]
1705                 public static extern int mknod (string pathname, FilePermissions mode, ulong dev);
1706
1707                 // mkfifo(3)
1708                 //    int mkfifo(const char *pathname, mode_t mode);
1709                 [DllImport (LIBC, SetLastError=true, EntryPoint="mkfifo")]
1710                 private static extern int sys_mkfifo (string pathname, uint mode);
1711
1712                 public static int mkfifo (string pathname, FilePermissions mode)
1713                 {
1714                         uint _mode = UnixConvert.FromFilePermissions (mode);
1715                         return sys_mkfifo (pathname, _mode);
1716                 }
1717
1718                 #endregion
1719
1720                 #region <sys/stat.h> Declarations
1721                 //
1722                 // <sys/statvfs.h>
1723                 //
1724
1725                 [DllImport (MPH, SetLastError=true,
1726                                 EntryPoint="Mono_Posix_Syscall_statvfs")]
1727                 public static extern int statvfs (string path, out Statvfs buf);
1728
1729                 [DllImport (MPH, SetLastError=true,
1730                                 EntryPoint="Mono_Posix_Syscall_fstatvfs")]
1731                 public static extern int fstatvfs (int fd, out Statvfs buf);
1732
1733                 #endregion
1734
1735                 #region <sys/time.h> Declarations
1736                 //
1737                 // <sys/time.h>
1738                 //
1739                 // TODO: adjtime(), getitimer(2), setitimer(2), lutimes(), futimes()
1740
1741                 [DllImport (MPH, SetLastError=true,
1742                                 EntryPoint="Mono_Posix_Syscall_gettimeofday")]
1743                 public static extern int gettimeofday (out Timeval tv, out Timezone tz);
1744
1745                 [DllImport (MPH, SetLastError=true,
1746                                 EntryPoint="Mono_Posix_Syscall_gettimeofday")]
1747                 private static extern int gettimeofday (out Timeval tv, IntPtr ignore);
1748
1749                 public static int gettimeofday (out Timeval tv)
1750                 {
1751                         return gettimeofday (out tv, IntPtr.Zero);
1752                 }
1753
1754                 [DllImport (MPH, SetLastError=true,
1755                                 EntryPoint="Mono_Posix_Syscall_gettimeofday")]
1756                 private static extern int gettimeofday (IntPtr ignore, out Timezone tz);
1757
1758                 public static int gettimeofday (out Timezone tz)
1759                 {
1760                         return gettimeofday (IntPtr.Zero, out tz);
1761                 }
1762
1763                 [DllImport (MPH, SetLastError=true,
1764                                 EntryPoint="Mono_Posix_Syscall_gettimeofday")]
1765                 public static extern int settimeofday (ref Timeval tv, ref Timezone tz);
1766
1767                 [DllImport (MPH, SetLastError=true,
1768                                 EntryPoint="Mono_Posix_Syscall_gettimeofday")]
1769                 private static extern int settimeofday (ref Timeval tv, IntPtr ignore);
1770
1771                 public static int settimeofday (ref Timeval tv)
1772                 {
1773                         return settimeofday (ref tv, IntPtr.Zero);
1774                 }
1775
1776                 [DllImport (MPH, SetLastError=true,
1777                                 EntryPoint="Mono_Posix_Syscall_utimes")]
1778                 public static extern int utimes (string filename, ref Timeval tvp);
1779
1780                 #endregion
1781
1782                 //
1783                 // <sys/timeb.h>
1784                 //
1785
1786                 // TODO: ftime(3)
1787
1788                 //
1789                 // <sys/times.h>
1790                 //
1791
1792                 // TODO: times(2)
1793
1794                 #region <sys/wait.h> Declarations
1795                 //
1796                 // <sys/wait.h>
1797                 //
1798
1799                 // wait(2)
1800                 //    pid_t wait(int *status);
1801                 [DllImport (LIBC, SetLastError=true)]
1802                 public static extern int wait (out int status);
1803
1804                 // waitpid(2)
1805                 //    pid_t waitpid(pid_t pid, int *status, int options);
1806                 [DllImport (LIBC, SetLastError=true)]
1807                 private static extern int waitpid (int pid, out int status, int options);
1808
1809                 public static int waitpid (int pid, out int status, WaitOptions options)
1810                 {
1811                         int _options = UnixConvert.FromWaitOptions (options);
1812                         return waitpid (pid, out status, _options);
1813                 }
1814
1815                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WIFEXITED")]
1816                 private static extern int _WIFEXITED (int status);
1817
1818                 public static bool WIFEXITED (int status)
1819                 {
1820                         return _WIFEXITED (status) != 0;
1821                 }
1822
1823                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WEXITSTATUS")]
1824                 public static extern int WEXITSTATUS (int status);
1825
1826                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WIFSIGNALED")]
1827                 private static extern int _WIFSIGNALED (int status);
1828
1829                 public static bool WIFSIGNALED (int status)
1830                 {
1831                         return _WIFSIGNALED (status) != 0;
1832                 }
1833
1834                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WTERMSIG")]
1835                 private static extern int _WTERMSIG (int status);
1836
1837                 public static Signum WTERMSIG (int status)
1838                 {
1839                         int r = _WTERMSIG (status);
1840                         return UnixConvert.ToSignum (r);
1841                 }
1842
1843                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WIFSTOPPED")]
1844                 private static extern int _WIFSTOPPED (int status);
1845
1846                 public static bool WIFSTOPPED (int status)
1847                 {
1848                         return _WIFSTOPPED (status) != 0;
1849                 }
1850
1851                 [DllImport (MPH, EntryPoint="Mono_Posix_Syscall_WSTOPSIG")]
1852                 private static extern int _WSTOPSIG (int status);
1853
1854                 public static Signum WSTOPSIG (int status)
1855                 {
1856                         int r = _WSTOPSIG (status);
1857                         return UnixConvert.ToSignum (r);
1858                 }
1859
1860                 //
1861                 // <termios.h>
1862                 //
1863
1864                 #endregion
1865
1866                 #region <syslog.h> Declarations
1867                 //
1868                 // <syslog.h>
1869                 //
1870
1871                 [DllImport (LIBC, EntryPoint="openlog")]
1872                 private static extern void sys_openlog (IntPtr ident, int option, int facility);
1873
1874                 public static void openlog (IntPtr ident, SyslogOptions option,
1875                                 SyslogFacility defaultFacility)
1876                 {
1877                         int _option   = UnixConvert.FromSyslogOptions (option);
1878                         int _facility = UnixConvert.FromSyslogFacility (defaultFacility);
1879
1880                         sys_openlog (ident, _option, _facility);
1881                 }
1882
1883                 [DllImport (LIBC)]
1884                 private static extern void sys_syslog (int priority, string message);
1885
1886                 public static void syslog (SyslogFacility facility, SyslogLevel level, string message)
1887                 {
1888                         int _facility = UnixConvert.FromSyslogFacility (facility);
1889                         int _level = UnixConvert.FromSyslogLevel (level);
1890                         sys_syslog (_facility | _level, GetSyslogMessage (message));
1891                 }
1892
1893                 public static void syslog (SyslogLevel level, string message)
1894                 {
1895                         int _level = UnixConvert.FromSyslogLevel (level);
1896                         sys_syslog (_level, GetSyslogMessage (message));
1897                 }
1898
1899                 private static string GetSyslogMessage (string message)
1900                 {
1901                         return UnixMarshal.EscapeFormatString (message, new char[]{'m'});
1902                 }
1903
1904                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
1905                                 "Use syslog(SyslogFacility, SyslogLevel, string) instead.")]
1906                 public static void syslog (SyslogFacility facility, SyslogLevel level,
1907                                 string format, params object[] parameters)
1908                 {
1909                         int _facility = UnixConvert.FromSyslogFacility (facility);
1910                         int _level = UnixConvert.FromSyslogLevel (level);
1911
1912                         object[] _parameters = new object[checked(parameters.Length+2)];
1913                         _parameters [0] = _facility | _level;
1914                         _parameters [1] = format;
1915                         Array.Copy (parameters, 0, _parameters, 2, parameters.Length);
1916                         XPrintfFunctions.syslog (_parameters);
1917                 }
1918
1919                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
1920                                 "Use syslog(SyslogLevel, string) instead.")]
1921                 public static void syslog (SyslogLevel level, string format,
1922                                 params object[] parameters)
1923                 {
1924                         int _level = UnixConvert.FromSyslogLevel (level);
1925
1926                         object[] _parameters = new object[checked(parameters.Length+2)];
1927                         _parameters [0] = _level;
1928                         _parameters [1] = format;
1929                         Array.Copy (parameters, 0, _parameters, 2, parameters.Length);
1930                         XPrintfFunctions.syslog (_parameters);
1931                 }
1932
1933                 [DllImport (LIBC)]
1934                 public static extern void closelog ();
1935
1936                 [DllImport (LIBC, EntryPoint="setlogmask")]
1937                 private static extern int sys_setlogmask (int mask);
1938
1939                 public static int setlogmask (SyslogLevel mask)
1940                 {
1941                         int _mask = UnixConvert.FromSyslogLevel (mask);
1942                         return sys_setlogmask (_mask);
1943                 }
1944
1945                 #endregion
1946
1947                 #region <time.h> Declarations
1948
1949                 //
1950                 // <time.h>
1951                 //
1952
1953                 // stime(2)
1954                 //    int stime(time_t *t);
1955                 [DllImport (MPH, SetLastError=true,
1956                                 EntryPoint="Mono_Posix_Syscall_stime")]
1957                 public static extern int stime (ref long t);
1958
1959                 // time(2)
1960                 //    time_t time(time_t *t);
1961                 [DllImport (MPH, SetLastError=true,
1962                                 EntryPoint="Mono_Posix_Syscall_time")]
1963                 public static extern long time (out long t);
1964
1965                 //
1966                 // <ulimit.h>
1967                 //
1968
1969                 // TODO: ulimit(3)
1970
1971                 #endregion
1972
1973                 #region <unistd.h> Declarations
1974                 //
1975                 // <unistd.h>
1976                 //
1977                 // TODO: euidaccess(), usleep(3), get_current_dir_name(), group_member(),
1978                 //       other TODOs listed below.
1979
1980                 [DllImport (LIBC, SetLastError=true, EntryPoint="access")]
1981                 private static extern int sys_access (string pathname, int mode);
1982
1983                 public static int access (string pathname, AccessMode mode)
1984                 {
1985                         int _mode = UnixConvert.FromAccessMode (mode);
1986                         return sys_access (pathname, _mode);
1987                 }
1988
1989                 // lseek(2)
1990                 //    off_t lseek(int filedes, off_t offset, int whence);
1991                 [DllImport (MPH, SetLastError=true,
1992                                 EntryPoint="Mono_Posix_Syscall_lseek")]
1993                 public static extern long lseek (int fd, long offset, SeekFlags whence);
1994
1995     [DllImport (LIBC, SetLastError=true)]
1996                 public static extern int close (int fd);
1997
1998                 // read(2)
1999                 //    ssize_t read(int fd, void *buf, size_t count);
2000                 [DllImport (MPH, SetLastError=true,
2001                                 EntryPoint="Mono_Posix_Syscall_read")]
2002                 public static extern long read (int fd, IntPtr buf, ulong count);
2003
2004                 public static unsafe long read (int fd, void *buf, ulong count)
2005                 {
2006                         return read (fd, (IntPtr) buf, count);
2007                 }
2008
2009                 // write(2)
2010                 //    ssize_t write(int fd, const void *buf, size_t count);
2011                 [DllImport (MPH, SetLastError=true,
2012                                 EntryPoint="Mono_Posix_Syscall_write")]
2013                 public static extern long write (int fd, IntPtr buf, ulong count);
2014
2015                 public static unsafe long write (int fd, void *buf, ulong count)
2016                 {
2017                         return write (fd, (IntPtr) buf, count);
2018                 }
2019
2020                 // pread(2)
2021                 //    ssize_t pread(int fd, void *buf, size_t count, off_t offset);
2022                 [DllImport (MPH, SetLastError=true,
2023                                 EntryPoint="Mono_Posix_Syscall_pread")]
2024                 public static extern long pread (int fd, IntPtr buf, ulong count, long offset);
2025
2026                 public static unsafe long pread (int fd, void *buf, ulong count, long offset)
2027                 {
2028                         return pread (fd, (IntPtr) buf, count, offset);
2029                 }
2030
2031                 // pwrite(2)
2032                 //    ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset);
2033                 [DllImport (MPH, SetLastError=true,
2034                                 EntryPoint="Mono_Posix_Syscall_pwrite")]
2035                 public static extern long pwrite (int fd, IntPtr buf, ulong count, long offset);
2036
2037                 public static unsafe long pwrite (int fd, void *buf, ulong count, long offset)
2038                 {
2039                         return pwrite (fd, (IntPtr) buf, count, offset);
2040                 }
2041
2042                 [DllImport (MPH, SetLastError=true,
2043                                 EntryPoint="Mono_Posix_Syscall_pipe")]
2044                 public static extern int pipe (out int reading, out int writing);
2045
2046                 public static int pipe (int[] filedes)
2047                 {
2048                         if (filedes == null || filedes.Length != 2) {
2049                                 // TODO: set errno
2050                                 return -1;
2051                         }
2052                         int reading, writing;
2053                         int r = pipe (out reading, out writing);
2054                         filedes[0] = reading;
2055                         filedes[1] = writing;
2056                         return r;
2057                 }
2058
2059                 [DllImport (LIBC, SetLastError=true)]
2060                 public static extern uint alarm (uint seconds);
2061
2062                 [DllImport (LIBC, SetLastError=true)]
2063                 public static extern uint sleep (uint seconds);
2064
2065                 [DllImport (LIBC, SetLastError=true)]
2066                 public static extern uint ualarm (uint usecs, uint interval);
2067
2068                 [DllImport (LIBC, SetLastError=true)]
2069                 public static extern int pause ();
2070
2071                 // chown(2)
2072                 //    int chown(const char *path, uid_t owner, gid_t group);
2073                 [DllImport (LIBC, SetLastError=true)]
2074                 public static extern int chown (string path, uint owner, uint group);
2075
2076                 // fchown(2)
2077                 //    int fchown(int fd, uid_t owner, gid_t group);
2078                 [DllImport (LIBC, SetLastError=true)]
2079                 public static extern int fchown (int fd, uint owner, uint group);
2080
2081                 // lchown(2)
2082                 //    int lchown(const char *path, uid_t owner, gid_t group);
2083                 [DllImport (LIBC, SetLastError=true)]
2084                 public static extern int lchown (string path, uint owner, uint group);
2085
2086                 [DllImport (LIBC, SetLastError=true)]
2087                 public static extern int chdir (string path);
2088
2089                 [DllImport (LIBC, SetLastError=true)]
2090                 public static extern int fchdir (int fd);
2091
2092                 // getcwd(3)
2093                 //    char *getcwd(char *buf, size_t size);
2094                 [DllImport (MPH, SetLastError=true,
2095                                 EntryPoint="Mono_Posix_Syscall_getcwd")]
2096                 public static extern IntPtr getcwd ([Out] StringBuilder buf, ulong size);
2097
2098                 public static StringBuilder getcwd (StringBuilder buf)
2099                 {
2100                         getcwd (buf, (ulong) buf.Capacity);
2101                         return buf;
2102                 }
2103
2104                 // getwd(2) is deprecated; don't expose it.
2105
2106                 [DllImport (LIBC, SetLastError=true)]
2107                 public static extern int dup (int fd);
2108
2109                 [DllImport (LIBC, SetLastError=true)]
2110                 public static extern int dup2 (int fd, int fd2);
2111
2112                 // TODO: does Mono marshal arrays properly?
2113                 [DllImport (LIBC, SetLastError=true)]
2114                 public static extern int execve (string path, string[] argv, string[] envp);
2115
2116                 [DllImport (LIBC, SetLastError=true)]
2117                 public static extern int fexecve (int fd, string[] argv, string[] envp);
2118
2119                 [DllImport (LIBC, SetLastError=true)]
2120                 public static extern int execv (string path, string[] argv);
2121
2122                 // TODO: execle, execl, execlp
2123                 [DllImport (LIBC, SetLastError=true)]
2124                 public static extern int execvp (string path, string[] argv);
2125
2126                 [DllImport (LIBC, SetLastError=true)]
2127                 public static extern int nice (int inc);
2128
2129                 [DllImport (LIBC, SetLastError=true)]
2130                 public static extern int _exit (int status);
2131
2132                 [DllImport (MPH, SetLastError=true,
2133                                 EntryPoint="Mono_Posix_Syscall_fpathconf")]
2134                 public static extern long fpathconf (int filedes, PathConf name);
2135
2136                 [DllImport (MPH, SetLastError=true,
2137                                 EntryPoint="Mono_Posix_Syscall_pathconf")]
2138                 public static extern long pathconf (string path, PathConf name);
2139
2140                 [DllImport (MPH, SetLastError=true,
2141                                 EntryPoint="Mono_Posix_Syscall_sysconf")]
2142                 public static extern long sysconf (SysConf name);
2143
2144                 // confstr(3)
2145                 //    size_t confstr(int name, char *buf, size_t len);
2146                 [DllImport (MPH, SetLastError=true,
2147                                 EntryPoint="Mono_Posix_Syscall_confstr")]
2148                 public static extern ulong confstr (ConfStr name, [Out] StringBuilder buf, ulong len);
2149
2150                 // getpid(2)
2151                 //    pid_t getpid(void);
2152                 [DllImport (LIBC, SetLastError=true)]
2153                 public static extern int getpid ();
2154
2155                 // getppid(2)
2156                 //    pid_t getppid(void);
2157                 [DllImport (LIBC, SetLastError=true)]
2158                 public static extern int getppid ();
2159
2160                 // setpgid(2)
2161                 //    int setpgid(pid_t pid, pid_t pgid);
2162                 [DllImport (LIBC, SetLastError=true)]
2163                 public static extern int setpgid (int pid, int pgid);
2164
2165                 // getpgid(2)
2166                 //    pid_t getpgid(pid_t pid);
2167                 [DllImport (LIBC, SetLastError=true)]
2168                 public static extern int getpgid (int pid);
2169
2170                 [DllImport (LIBC, SetLastError=true)]
2171                 public static extern int setpgrp ();
2172
2173                 // getpgrp(2)
2174                 //    pid_t getpgrp(void);
2175                 [DllImport (LIBC, SetLastError=true)]
2176                 public static extern int getpgrp ();
2177
2178                 // setsid(2)
2179                 //    pid_t setsid(void);
2180                 [DllImport (LIBC, SetLastError=true)]
2181                 public static extern int setsid ();
2182
2183                 // getsid(2)
2184                 //    pid_t getsid(pid_t pid);
2185                 [DllImport (LIBC, SetLastError=true)]
2186                 public static extern int getsid (int pid);
2187
2188                 // getuid(2)
2189                 //    uid_t getuid(void);
2190                 [DllImport (LIBC, SetLastError=true)]
2191                 public static extern uint getuid ();
2192
2193                 // geteuid(2)
2194                 //    uid_t geteuid(void);
2195                 [DllImport (LIBC, SetLastError=true)]
2196                 public static extern uint geteuid ();
2197
2198                 // getgid(2)
2199                 //    gid_t getgid(void);
2200                 [DllImport (LIBC, SetLastError=true)]
2201                 public static extern uint getgid ();
2202
2203                 // getegid(2)
2204                 //    gid_t getgid(void);
2205                 [DllImport (LIBC, SetLastError=true)]
2206                 public static extern uint getegid ();
2207
2208                 // getgroups(2)
2209                 //    int getgroups(int size, gid_t list[]);
2210                 [DllImport (LIBC, SetLastError=true)]
2211                 public static extern int getgroups (int size, uint[] list);
2212
2213                 public static int getgroups (uint[] list)
2214                 {
2215                         return getgroups (list.Length, list);
2216                 }
2217
2218                 // setuid(2)
2219                 //    int setuid(uid_t uid);
2220                 [DllImport (LIBC, SetLastError=true)]
2221                 public static extern int setuid (uint uid);
2222
2223                 // setreuid(2)
2224                 //    int setreuid(uid_t ruid, uid_t euid);
2225                 [DllImport (LIBC, SetLastError=true)]
2226                 public static extern int setreuid (uint ruid, uint euid);
2227
2228                 // setregid(2)
2229                 //    int setregid(gid_t ruid, gid_t euid);
2230                 [DllImport (LIBC, SetLastError=true)]
2231                 public static extern int setregid (uint rgid, uint egid);
2232
2233                 // seteuid(2)
2234                 //    int seteuid(uid_t euid);
2235                 [DllImport (LIBC, SetLastError=true)]
2236                 public static extern int seteuid (uint euid);
2237
2238                 // setegid(2)
2239                 //    int setegid(gid_t euid);
2240                 [DllImport (LIBC, SetLastError=true)]
2241                 public static extern int setegid (uint uid);
2242
2243                 // setgid(2)
2244                 //    int setgid(gid_t gid);
2245                 [DllImport (LIBC, SetLastError=true)]
2246                 public static extern int setgid (uint gid);
2247
2248                 // getresuid(2)
2249                 //    int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
2250                 [DllImport (LIBC, SetLastError=true)]
2251                 public static extern int getresuid (out uint ruid, out uint euid, out uint suid);
2252
2253                 // getresgid(2)
2254                 //    int getresgid(gid_t *ruid, gid_t *euid, gid_t *suid);
2255                 [DllImport (LIBC, SetLastError=true)]
2256                 public static extern int getresgid (out uint rgid, out uint egid, out uint sgid);
2257
2258                 // setresuid(2)
2259                 //    int setresuid(uid_t ruid, uid_t euid, uid_t suid);
2260                 [DllImport (LIBC, SetLastError=true)]
2261                 public static extern int setresuid (uint ruid, uint euid, uint suid);
2262
2263                 // setresgid(2)
2264                 //    int setresgid(gid_t ruid, gid_t euid, gid_t suid);
2265                 [DllImport (LIBC, SetLastError=true)]
2266                 public static extern int setresgid (uint rgid, uint egid, uint sgid);
2267
2268                 // fork(2)
2269                 //    pid_t fork(void);
2270                 [DllImport (LIBC, SetLastError=true)]
2271                 [Obsolete ("DO NOT directly call fork(2); it bypasses essential " +
2272                                 "shutdown code.\nUse System.Diagnostics.Process instead")]
2273                 public static extern int fork ();
2274
2275                 // vfork(2)
2276                 //    pid_t vfork(void);
2277                 [DllImport (LIBC, SetLastError=true)]
2278                 [Obsolete ("DO NOT directly call vfork(2); it bypasses essential " +
2279                                 "shutdown code.\nUse System.Diagnostics.Process instead")]
2280                 public static extern int vfork ();
2281
2282                 [DllImport (LIBC, SetLastError=true, EntryPoint="ttyname")]
2283                 private static extern IntPtr sys_ttyname (int fd);
2284
2285                 [Obsolete ("Not re-entrant.  Use ttyname_r instead.")]
2286                 public static string ttyname (int fd)
2287                 {
2288                         IntPtr r = sys_ttyname (fd);
2289                         return UnixMarshal.PtrToString (r);
2290                 }
2291
2292                 // ttyname_r(3)
2293                 //    int ttyname_r(int fd, char *buf, size_t buflen);
2294                 [DllImport (MPH, SetLastError=true,
2295                                 EntryPoint="Mono_Posix_Syscall_ttyname_r")]
2296                 public static extern int ttyname_r (int fd, [Out] StringBuilder buf, ulong buflen);
2297
2298                 public static int ttyname_r (int fd, StringBuilder buf)
2299                 {
2300                         return ttyname_r (fd, buf, (ulong) buf.Capacity);
2301                 }
2302
2303                 [DllImport (LIBC, EntryPoint="isatty")]
2304                 private static extern int sys_isatty (int fd);
2305
2306                 public static bool isatty (int fd)
2307                 {
2308                         return sys_isatty (fd) == 1;
2309                 }
2310
2311                 [DllImport (LIBC, SetLastError=true)]
2312                 public static extern int link (string oldpath, string newpath);
2313
2314                 [DllImport (LIBC, SetLastError=true)]
2315                 public static extern int symlink (string oldpath, string newpath);
2316
2317                 // readlink(2)
2318                 //    int readlink(const char *path, char *buf, size_t bufsize);
2319                 [DllImport (MPH, SetLastError=true,
2320                                 EntryPoint="Mono_Posix_Syscall_readlink")]
2321                 public static extern int readlink (string path, [Out] StringBuilder buf, ulong bufsiz);
2322
2323                 public static int readlink (string path, [Out] StringBuilder buf)
2324                 {
2325                         return readlink (path, buf, (ulong) buf.Capacity);
2326                 }
2327
2328                 [DllImport (LIBC, SetLastError=true)]
2329                 public static extern int unlink (string pathname);
2330
2331                 [DllImport (LIBC, SetLastError=true)]
2332                 public static extern int rmdir (string pathname);
2333
2334                 // tcgetpgrp(3)
2335                 //    pid_t tcgetpgrp(int fd);
2336                 [DllImport (LIBC, SetLastError=true)]
2337                 public static extern int tcgetpgrp (int fd);
2338
2339                 // tcsetpgrp(3)
2340                 //    int tcsetpgrp(int fd, pid_t pgrp);
2341                 [DllImport (LIBC, SetLastError=true)]
2342                 public static extern int tcsetpgrp (int fd, int pgrp);
2343
2344                 [DllImport (LIBC, SetLastError=true, EntryPoint="getlogin")]
2345                 private static extern IntPtr sys_getlogin ();
2346
2347                 [Obsolete ("Not re-entrant.  Use getlogin_r instead.")]
2348                 public static string getlogin ()
2349                 {
2350                         IntPtr r = sys_getlogin ();
2351                         return UnixMarshal.PtrToString (r);
2352                 }
2353
2354                 // getlogin_r(3)
2355                 //    int getlogin_r(char *buf, size_t bufsize);
2356                 [DllImport (MPH, SetLastError=true,
2357                                 EntryPoint="Mono_Posix_Syscall_getlogin_r")]
2358                 public static extern int getlogin_r ([Out] StringBuilder name, ulong bufsize);
2359
2360                 public static int getlogin_r (StringBuilder name)
2361                 {
2362                         return getlogin_r (name, (ulong) name.Capacity);
2363                 }
2364
2365                 [DllImport (LIBC, SetLastError=true)]
2366                 public static extern int setlogin (string name);
2367
2368                 // gethostname(2)
2369                 //    int gethostname(char *name, size_t len);
2370                 [DllImport (MPH, SetLastError=true,
2371                                 EntryPoint="Mono_Posix_Syscall_gethostname")]
2372                 public static extern int gethostname ([Out] StringBuilder name, ulong len);
2373
2374                 public static int gethostname (StringBuilder name)
2375                 {
2376                         return gethostname (name, (ulong) name.Capacity);
2377                 }
2378
2379                 // sethostname(2)
2380                 //    int gethostname(const char *name, size_t len);
2381                 [DllImport (MPH, SetLastError=true,
2382                                 EntryPoint="Mono_Posix_Syscall_gethostname")]
2383                 public static extern int sethostname (string name, ulong len);
2384
2385                 public static int sethostname (string name)
2386                 {
2387                         return sethostname (name, (ulong) name.Length);
2388                 }
2389
2390                 [DllImport (MPH, SetLastError=true,
2391                                 EntryPoint="Mono_Posix_Syscall_gethostid")]
2392                 public static extern long gethostid ();
2393
2394                 [DllImport (MPH, SetLastError=true,
2395                                 EntryPoint="Mono_Posix_Syscall_sethostid")]
2396                 public static extern int sethostid (long hostid);
2397
2398                 // getdomainname(2)
2399                 //    int getdomainname(char *name, size_t len);
2400                 [DllImport (MPH, SetLastError=true,
2401                                 EntryPoint="Mono_Posix_Syscall_getdomainname")]
2402                 public static extern int getdomainname ([Out] StringBuilder name, ulong len);
2403
2404                 public static int getdomainname (StringBuilder name)
2405                 {
2406                         return getdomainname (name, (ulong) name.Capacity);
2407                 }
2408
2409                 // setdomainname(2)
2410                 //    int setdomainname(const char *name, size_t len);
2411                 [DllImport (MPH, SetLastError=true,
2412                                 EntryPoint="Mono_Posix_Syscall_setdomainname")]
2413                 public static extern int setdomainname (string name, ulong len);
2414
2415                 public static int setdomainname (string name)
2416                 {
2417                         return setdomainname (name, (ulong) name.Length);
2418                 }
2419
2420                 [DllImport (LIBC, SetLastError=true)]
2421                 public static extern int vhangup ();
2422
2423                 // Revoke doesn't appear to be POSIX.  Include it?
2424                 [DllImport (LIBC, SetLastError=true)]
2425                 public static extern int revoke (string file);
2426
2427                 // TODO: profil?  It's not POSIX.
2428
2429                 [DllImport (LIBC, SetLastError=true)]
2430                 public static extern int acct (string filename);
2431
2432                 [DllImport (LIBC, SetLastError=true, EntryPoint="getusershell")]
2433                 private static extern IntPtr sys_getusershell ();
2434
2435                 public static string getusershell ()
2436                 {
2437                         IntPtr r = sys_getusershell ();
2438                         return UnixMarshal.PtrToString (r);
2439                 }
2440
2441                 [DllImport (LIBC, SetLastError=true)]
2442                 public static extern void setusershell ();
2443
2444                 [DllImport (LIBC, SetLastError=true)]
2445                 public static extern void endusershell ();
2446
2447                 [DllImport (LIBC, SetLastError=true)]
2448                 private static extern int daemon (int nochdir, int noclose);
2449
2450                 public static int daemon (bool nochdir, bool noclose)
2451                 {
2452                         return daemon (nochdir ? 1 : 0, noclose ? 1 : 0);
2453                 }
2454
2455                 [DllImport (LIBC, SetLastError=true)]
2456                 public static extern int chroot (string path);
2457
2458                 // skipping getpass(3) as the man page states:
2459                 //   This function is obsolete.  Do not use it.
2460
2461                 [DllImport (LIBC, SetLastError=true)]
2462                 public static extern int fsync (int fd);
2463
2464                 [DllImport (LIBC, SetLastError=true)]
2465                 public static extern int fdatasync (int fd);
2466
2467                 [DllImport (LIBC, SetLastError=true)]
2468                 public static extern void sync ();
2469
2470                 [DllImport (LIBC, SetLastError=true)]
2471                 [Obsolete ("Dropped in POSIX 1003.1-2001.  " +
2472                                 "Use Unistd.sysconf (SysConf._SC_PAGESIZE).")]
2473                 public static extern int getpagesize ();
2474
2475                 // truncate(2)
2476                 //    int truncate(const char *path, off_t length);
2477                 [DllImport (MPH, SetLastError=true,
2478                                 EntryPoint="Mono_Posix_Syscall_truncate")]
2479                 public static extern int truncate (string path, long length);
2480
2481                 // ftruncate(2)
2482                 //    int ftruncate(int fd, off_t length);
2483                 [DllImport (MPH, SetLastError=true,
2484                                 EntryPoint="Mono_Posix_Syscall_ftruncate")]
2485                 public static extern int ftruncate (int fd, long length);
2486
2487                 [DllImport (LIBC, SetLastError=true)]
2488                 public static extern int getdtablesize ();
2489
2490                 [DllImport (LIBC, SetLastError=true)]
2491                 public static extern int brk (IntPtr end_data_segment);
2492
2493                 [DllImport (LIBC, SetLastError=true)]
2494                 public static extern IntPtr sbrk (IntPtr increment);
2495
2496                 // TODO: syscall(2)?
2497                 // Probably safer to skip entirely.
2498
2499                 // lockf(3)
2500                 //    int lockf(int fd, int cmd, off_t len);
2501                 [DllImport (MPH, SetLastError=true,
2502                                 EntryPoint="Mono_Posix_Syscall_lockf")]
2503                 public static extern int lockf (int fd, LockFlags cmd, long len);
2504
2505                 [DllImport (CRYPT, SetLastError=true, EntryPoint="crypt")]
2506                 private static extern IntPtr sys_crypt (string key, string salt);
2507
2508                 public static string crypt (string key, string salt)
2509                 {
2510                         IntPtr r = sys_crypt (key, salt);
2511                         return UnixMarshal.PtrToString (r);
2512                 }
2513
2514                 [DllImport (CRYPT, SetLastError=true, EntryPoint="encrypt")]
2515                 private static extern void sys_encrypt ([In, Out] byte[] block, int edflag);
2516
2517                 public static void encrypt (byte[] block, bool decode)
2518                 {
2519                         if (block.Length < 64)
2520                                 throw new ArgumentOutOfRangeException ("block", "Must refer to at least 64 bytes");
2521                         sys_encrypt (block, decode ? 1 : 0);
2522                 }
2523
2524                 // swab(3)
2525                 //    void swab(const void *from, void *to, ssize_t n);
2526                 [DllImport (MPH, SetLastError=true,
2527                                 EntryPoint="Mono_Posix_Syscall_swab")]
2528                 public static extern void swab (IntPtr from, IntPtr to, long n);
2529
2530                 public static unsafe void swab (void* from, void* to, long n)
2531                 {
2532                         swab ((IntPtr) from, (IntPtr) to, n);
2533                 }
2534
2535                 #endregion
2536
2537                 #region <utime.h> Declarations
2538                 //
2539                 // <utime.h>  -- COMPLETE
2540                 //
2541
2542                 [DllImport (MPH, SetLastError=true,
2543                                 EntryPoint="Mono_Posix_Syscall_utime")]
2544                 public static extern int utime (string filename, ref Utimbuf buf);
2545
2546                 [DllImport (MPH, SetLastError=true,
2547                                 EntryPoint="Mono_Posix_Syscall_utime")]
2548                 private static extern int utime (string filename, IntPtr buf);
2549
2550                 public static int utime (string filename)
2551                 {
2552                         return utime (filename, IntPtr.Zero);
2553                 }
2554                 #endregion
2555         }
2556
2557         #endregion
2558 }
2559
2560 // vim: noexpandtab