mcs/class/Mono.Posix/Mono.Unix.Native/Stdlib.cs

   1 //
   2 // Mono.Unix/Stdlib.cs
   3 //
   4 // Authors:
   5 //   Jonathan Pryor (jonpryor@vt.edu)
   6 //
   7 // (C) 2004-2006 Jonathan Pryor
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.IO;
  32 using System.Runtime.InteropServices;
  33 using System.Text;
  34 using Mono.Unix.Native;
  35
  36 namespace Mono.Unix.Native {
  37
  38         #region Enumerations
  39
  40         [Map]
  41         public enum Errno : int {
  42                 // errors & their values liberally copied from
  43                 // FC2 /usr/include/asm/errno.h
  44
  45                 EPERM           =   1, // Operation not permitted
  46                 ENOENT          =   2, // No such file or directory
  47                 ESRCH           =   3, // No such process
  48                 EINTR           =   4, // Interrupted system call
  49                 EIO             =   5, // I/O error
  50                 ENXIO           =   6, // No such device or address
  51                 E2BIG           =   7, // Arg list too long
  52                 ENOEXEC         =   8, // Exec format error
  53                 EBADF           =   9, // Bad file number
  54                 ECHILD          =  10, // No child processes
  55                 EAGAIN          =  11, // Try again
  56                 ENOMEM          =  12, // Out of memory
  57                 EACCES          =  13, // Permission denied
  58                 EFAULT          =  14, // Bad address
  59                 ENOTBLK         =  15, // Block device required
  60                 EBUSY           =  16, // Device or resource busy
  61                 EEXIST          =  17, // File exists
  62                 EXDEV           =  18, // Cross-device link
  63                 ENODEV          =  19, // No such device
  64                 ENOTDIR         =  20, // Not a directory
  65                 EISDIR          =  21, // Is a directory
  66                 EINVAL          =  22, // Invalid argument
  67                 ENFILE          =  23, // File table overflow
  68                 EMFILE          =  24, // Too many open files
  69                 ENOTTY          =  25, // Not a typewriter
  70                 ETXTBSY         =  26, // Text file busy
  71                 EFBIG           =  27, // File too large
  72                 ENOSPC          =  28, // No space left on device
  73                 ESPIPE          =  29, // Illegal seek
  74                 EROFS           =  30, // Read-only file system
  75                 EMLINK          =  31, // Too many links
  76                 EPIPE           =  32, // Broken pipe
  77                 EDOM            =  33, // Math argument out of domain of func
  78                 ERANGE          =  34, // Math result not representable
  79                 EDEADLK         =  35, // Resource deadlock would occur
  80                 ENAMETOOLONG    =  36, // File name too long
  81                 ENOLCK          =  37, // No record locks available
  82                 ENOSYS          =  38, // Function not implemented
  83                 ENOTEMPTY       =  39, // Directory not empty
  84                 ELOOP           =  40, // Too many symbolic links encountered
  85                 EWOULDBLOCK     =  EAGAIN, // Operation would block
  86                 ENOMSG          =  42, // No message of desired type
  87                 EIDRM           =  43, // Identifier removed
  88                 ECHRNG          =  44, // Channel number out of range
  89                 EL2NSYNC        =  45, // Level 2 not synchronized
  90                 EL3HLT          =  46, // Level 3 halted
  91                 EL3RST          =  47, // Level 3 reset
  92                 ELNRNG          =  48, // Link number out of range
  93                 EUNATCH         =  49, // Protocol driver not attached
  94                 ENOCSI          =  50, // No CSI structure available
  95                 EL2HLT          =  51, // Level 2 halted
  96                 EBADE           =  52, // Invalid exchange
  97                 EBADR           =  53, // Invalid request descriptor
  98                 EXFULL          =  54, // Exchange full
  99                 ENOANO          =  55, // No anode
 100                 EBADRQC         =  56, // Invalid request code
 101                 EBADSLT         =  57, // Invalid slot
 102
 103                 EDEADLOCK             =  EDEADLK,
 104
 105                 EBFONT          =  59, // Bad font file format
 106                 ENOSTR          =  60, // Device not a stream
 107                 ENODATA         =  61, // No data available
 108                 ETIME           =  62, // Timer expired
 109                 ENOSR           =  63, // Out of streams resources
 110                 ENONET          =  64, // Machine is not on the network
 111                 ENOPKG          =  65, // Package not installed
 112                 EREMOTE         =  66, // Object is remote
 113                 ENOLINK         =  67, // Link has been severed
 114                 EADV            =  68, // Advertise error
 115                 ESRMNT          =  69, // Srmount error
 116                 ECOMM           =  70, // Communication error on send
 117                 EPROTO          =  71, // Protocol error
 118                 EMULTIHOP       =  72, // Multihop attempted
 119                 EDOTDOT         =  73, // RFS specific error
 120                 EBADMSG         =  74, // Not a data message
 121                 EOVERFLOW       =  75, // Value too large for defined data type
 122                 ENOTUNIQ        =  76, // Name not unique on network
 123                 EBADFD          =  77, // File descriptor in bad state
 124                 EREMCHG         =  78, // Remote address changed
 125                 ELIBACC         =  79, // Can not access a needed shared library
 126                 ELIBBAD         =  80, // Accessing a corrupted shared library
 127                 ELIBSCN         =  81, // .lib section in a.out corrupted
 128                 ELIBMAX         =  82, // Attempting to link in too many shared libraries
 129                 ELIBEXEC        =  83, // Cannot exec a shared library directly
 130                 EILSEQ          =  84, // Illegal byte sequence
 131                 ERESTART        =  85, // Interrupted system call should be restarted
 132                 ESTRPIPE        =  86, // Streams pipe error
 133                 EUSERS          =  87, // Too many users
 134                 ENOTSOCK        =  88, // Socket operation on non-socket
 135                 EDESTADDRREQ    =  89, // Destination address required
 136                 EMSGSIZE        =  90, // Message too long
 137                 EPROTOTYPE      =  91, // Protocol wrong type for socket
 138                 ENOPROTOOPT     =  92, // Protocol not available
 139                 EPROTONOSUPPORT =  93, // Protocol not supported
 140                 ESOCKTNOSUPPORT =  94, // Socket type not supported
 141                 EOPNOTSUPP      =  95, // Operation not supported on transport endpoint
 142                 EPFNOSUPPORT    =  96, // Protocol family not supported
 143                 EAFNOSUPPORT    =  97, // Address family not supported by protocol
 144                 EADDRINUSE      =  98, // Address already in use
 145                 EADDRNOTAVAIL   =  99, // Cannot assign requested address
 146                 ENETDOWN        = 100, // Network is down
 147                 ENETUNREACH     = 101, // Network is unreachable
 148                 ENETRESET       = 102, // Network dropped connection because of reset
 149                 ECONNABORTED    = 103, // Software caused connection abort
 150                 ECONNRESET      = 104, // Connection reset by peer
 151                 ENOBUFS         = 105, // No buffer space available
 152                 EISCONN         = 106, // Transport endpoint is already connected
 153                 ENOTCONN        = 107, // Transport endpoint is not connected
 154                 ESHUTDOWN       = 108, // Cannot send after transport endpoint shutdown
 155                 ETOOMANYREFS    = 109, // Too many references: cannot splice
 156                 ETIMEDOUT       = 110, // Connection timed out
 157                 ECONNREFUSED    = 111, // Connection refused
 158                 EHOSTDOWN       = 112, // Host is down
 159                 EHOSTUNREACH    = 113, // No route to host
 160                 EALREADY        = 114, // Operation already in progress
 161                 EINPROGRESS     = 115, // Operation now in progress
 162                 ESTALE          = 116, // Stale NFS file handle
 163                 EUCLEAN         = 117, // Structure needs cleaning
 164                 ENOTNAM         = 118, // Not a XENIX named type file
 165                 ENAVAIL         = 119, // No XENIX semaphores available
 166                 EISNAM          = 120, // Is a named type file
 167                 EREMOTEIO       = 121, // Remote I/O error
 168                 EDQUOT          = 122, // Quota exceeded
 169
 170                 ENOMEDIUM       = 123, // No medium found
 171                 EMEDIUMTYPE     = 124, // Wrong medium type
 172
 173                 ECANCELED       = 125,
 174                 ENOKEY          = 126,
 175                 EKEYEXPIRED     = 127,
 176                 EKEYREVOKED     = 128,
 177                 EKEYREJECTED    = 129,
 178
 179                 EOWNERDEAD      = 130,
 180                 ENOTRECOVERABLE = 131,
 181
 182                 // OS X-specific values: OS X value + 1000
 183                 EPROCLIM        = 1067, // Too many processes
 184                 EBADRPC         = 1072, // RPC struct is bad
 185                 ERPCMISMATCH    = 1073, // RPC version wrong
 186                 EPROGUNAVAIL    = 1074, // RPC prog. not avail
 187                 EPROGMISMATCH   = 1075, // Program version wrong
 188                 EPROCUNAVAIL    = 1076, // Bad procedure for program
 189                 EFTYPE          = 1079, // Inappropriate file type or format
 190                 EAUTH           = 1080, // Authentication error
 191                 ENEEDAUTH       = 1081, // Need authenticator
 192                 EPWROFF         = 1082, // Device power is off
 193                 EDEVERR         = 1083, // Device error, e.g. paper out
 194                 EBADEXEC        = 1085, // Bad executable
 195                 EBADARCH        = 1086, // Bad CPU type in executable
 196                 ESHLIBVERS      = 1087, // Shared library version mismatch
 197                 EBADMACHO       = 1088, // Malformed Macho file
 198                 ENOATTR         = 1093, // Attribute not found
 199                 ENOPOLICY       = 1103, // No such policy registered
 200         }
 201
 202         #endregion
 203
 204         #region Classes
 205
 206         public sealed class FilePosition : MarshalByRefObject, IDisposable
 207 #if NET_2_0
 208                 , IEquatable <FilePosition>
 209 #endif
 210         {
 211
 212                 private static readonly int FilePositionDumpSize =
 213                         Stdlib.DumpFilePosition (null, new HandleRef (null, IntPtr.Zero), 0);
 214
 215                 private HandleRef pos;
 216
 217                 public FilePosition ()
 218                 {
 219                         IntPtr p = Stdlib.CreateFilePosition ();
 220                         if (p == IntPtr.Zero)
 221                                 throw new OutOfMemoryException ("Unable to malloc fpos_t!");
 222                         pos = new HandleRef (this, p);
 223                 }
 224
 225                 internal HandleRef Handle {
 226                         get {return pos;}
 227                 }
 228
 229                 public void Dispose ()
 230                 {
 231                         Cleanup ();
 232                         GC.SuppressFinalize (this);
 233                 }
 234
 235                 private void Cleanup ()
 236                 {
 237                         if (pos.Handle != IntPtr.Zero) {
 238                                 Stdlib.free (pos.Handle);
 239                                 pos = new HandleRef (this, IntPtr.Zero);
 240                         }
 241                 }
 242
 243                 public override string ToString ()
 244                 {
 245                         return "(" + base.ToString () + " " + GetDump () + ")";
 246                 }
 247
 248                 private string GetDump ()
 249                 {
 250                         if (FilePositionDumpSize <= 0)
 251                                 return "internal error";
 252
 253                         StringBuilder buf = new StringBuilder (FilePositionDumpSize+1);
 254
 255                         if (Stdlib.DumpFilePosition (buf, Handle, FilePositionDumpSize+1) <= 0)
 256                                 return "internal error dumping fpos_t";
 257
 258                         return buf.ToString ();
 259                 }
 260
 261                 public override bool Equals (object obj)
 262                 {
 263                         FilePosition fp = obj as FilePosition;
 264                         if (obj == null || fp == null)
 265                                 return false;
 266                         return ToString().Equals (obj.ToString());
 267                 }
 268
 269                 public bool Equals (FilePosition value)
 270                 {
 271                         if (object.ReferenceEquals (this, value))
 272                                 return true;
 273                         return ToString().Equals (value.ToString());
 274                 }
 275
 276                 public override int GetHashCode ()
 277                 {
 278                         return ToString ().GetHashCode ();
 279                 }
 280
 281                 ~FilePosition ()
 282                 {
 283                         Cleanup ();
 284                 }
 285
 286                 public static bool operator== (FilePosition lhs, FilePosition rhs)
 287                 {
 288                         return Object.Equals (lhs, rhs);
 289                 }
 290
 291                 public static bool operator!= (FilePosition lhs, FilePosition rhs)
 292                 {
 293                         return !Object.Equals (lhs, rhs);
 294                 }
 295         }
 296
 297
 298         public enum SignalAction {
 299                 Default,
 300                 Ignore,
 301                 Error
 302         }
 303
 304         //
 305         // Right now using this attribute gives an assert because it
 306         // isn't implemented.
 307         //
 308 #if NET_2_0 && UNMANAGED_FN_PTR_SUPPORT_FIXED
 309         [UnmanagedFunctionPointer (CallingConvention.Cdecl)]
 310 #endif
 311         public delegate void SignalHandler (int signal);
 312
 313 #if !NET_2_0
 314         internal sealed class SignalWrapper {
 315                 private IntPtr handler;
 316
 317                 internal SignalWrapper (IntPtr handler)
 318                 {
 319                         this.handler = handler;
 320                 }
 321
 322                 public void InvokeSignalHandler (int signum)
 323                 {
 324                         Stdlib.InvokeSignalHandler (signum, handler);
 325                 }
 326         }
 327 #endif
 328
 329         internal class XPrintfFunctions
 330         {
 331                 internal delegate object XPrintf (object[] parameters);
 332
 333                 internal static XPrintf printf;
 334                 internal static XPrintf fprintf;
 335                 internal static XPrintf snprintf;
 336                 internal static XPrintf syslog;
 337
 338                 static XPrintfFunctions ()
 339                 {
 340                         CdeclFunction _printf = new CdeclFunction (Stdlib.LIBC, "printf", typeof(int));
 341                         printf = new XPrintf (_printf.Invoke);
 342
 343                         CdeclFunction _fprintf = new CdeclFunction (Stdlib.LIBC, "fprintf", typeof(int));
 344                         fprintf = new XPrintf (_fprintf.Invoke);
 345
 346                         CdeclFunction _snprintf = new CdeclFunction (Stdlib.MPH,
 347                                         "Mono_Posix_Stdlib_snprintf", typeof(int));
 348                         snprintf = new XPrintf (_snprintf.Invoke);
 349
 350                         CdeclFunction _syslog = new CdeclFunction (Syscall.MPH,
 351                                         "Mono_Posix_Stdlib_syslog2", typeof(int));
 352                         syslog = new XPrintf (_syslog.Invoke);
 353                 }
 354         }
 355
 356         //
 357         // Convention: Functions that are part of the C standard library go here.
 358         //
 359         // For example, the man page should say something similar to:
 360         //
 361         //    CONFORMING TO
 362         //           ISO 9899 (''ANSI C'')
 363         //
 364         // The intent is that members of this class should be portable to any system
 365         // supporting the C runtime (read: non-Unix, including Windows).  Using
 366         // anything from Syscall is non-portable, but restricting yourself to just
 367         // Stdlib is intended to be portable.
 368         //
 369         // The only methods in here should be:
 370         //  (1) low-level functions (as defined above).
 371         //  (2) "Trivial" function overloads.  For example, if the parameters to a
 372         //      function are related (e.g. fwrite(3))
 373         //  (3) The return type SHOULD NOT be changed.  If you want to provide a
 374         //      convenience function with a nicer return type, place it into one of
 375         //      the Mono.Unix.Std* wrapper classes, and give it a .NET-styled name.
 376         //      - EXCEPTION: No public functions should have a `void' return type.
 377         //        `void' return types should be replaced with `int'.
 378         //        Rationality: `void'-return functions typically require a
 379         //        complicated call sequence, such as clear errno, then call, then
 380         //        check errno to see if any errors occurred.  This sequence can't
 381         //        be done safely in managed code, as errno may change as part of
 382         //        the P/Invoke mechanism.
 383         //        Instead, add a MonoPosixHelper export which does:
 384         //          errno = 0;
 385         //          INVOKE SYSCALL;
 386         //          return errno == 0 ? 0 : -1;
 387         //        This lets managed code check the return value in the usual manner.
 388         //  (4) Exceptions SHOULD NOT be thrown.  EXCEPTIONS:
 389         //      - If you're wrapping *broken* methods which make assumptions about
 390         //        input data, such as that an argument refers to N bytes of data.
 391         //        This is currently limited to cuserid(3) and encrypt(3).
 392         //      - If you call functions which themselves generate exceptions.
 393         //        This is the case for using NativeConvert, which will throw an
 394         //        exception if an invalid/unsupported value is used.
 395         //
 396         public class Stdlib
 397         {
 398                 internal const string LIBC = "msvcrt";
 399                 internal const string MPH  = "MonoPosixHelper";
 400
 401                 internal Stdlib () {}
 402
 403                 #region <errno.h> Declarations
 404                 //
 405                 // <errno.h>  -- COMPLETE
 406                 //
 407
 408                 public static Errno GetLastError ()
 409                 {
 410                         int errno = Marshal.GetLastWin32Error ();
 411                         return NativeConvert.ToErrno (errno);
 412                 }
 413
 414                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 415                                 EntryPoint="Mono_Posix_Stdlib_SetLastError")]
 416                 private static extern void SetLastError (int error);
 417
 418                 protected static void SetLastError (Errno error)
 419                 {
 420                         int _error = NativeConvert.FromErrno (error);
 421                         SetLastError (_error);
 422                 }
 423
 424                 #endregion
 425
 426                 //
 427                 // <signal.h>
 428                 //
 429                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 430                                 EntryPoint="Mono_Posix_Stdlib_InvokeSignalHandler")]
 431                 internal static extern void InvokeSignalHandler (int signum, IntPtr handler);
 432
 433                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 434                                 EntryPoint="Mono_Posix_Stdlib_SIG_DFL")]
 435                 private static extern IntPtr GetDefaultSignal ();
 436
 437                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 438                                 EntryPoint="Mono_Posix_Stdlib_SIG_ERR")]
 439                 private static extern IntPtr GetErrorSignal ();
 440
 441                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 442                                 EntryPoint="Mono_Posix_Stdlib_SIG_IGN")]
 443                 private static extern IntPtr GetIgnoreSignal ();
 444
 445                 private static readonly IntPtr _SIG_DFL = GetDefaultSignal ();
 446                 private static readonly IntPtr _SIG_ERR = GetErrorSignal ();
 447                 private static readonly IntPtr _SIG_IGN = GetIgnoreSignal ();
 448
 449                 private static void _ErrorHandler (int signum)
 450                 {
 451                         Console.Error.WriteLine ("Error handler invoked for signum " +
 452                                         signum + ".  Don't do that.");
 453                 }
 454
 455                 private static void _DefaultHandler (int signum)
 456                 {
 457                         Console.Error.WriteLine ("Default handler invoked for signum " +
 458                                         signum + ".  Don't do that.");
 459                 }
 460
 461                 private static void _IgnoreHandler (int signum)
 462                 {
 463                         Console.Error.WriteLine ("Ignore handler invoked for signum " +
 464                                         signum + ".  Don't do that.");
 465                 }
 466
 467                 [CLSCompliant (false)]
 468                 public static readonly SignalHandler SIG_DFL = new SignalHandler (_DefaultHandler);
 469                 [CLSCompliant (false)]
 470                 public static readonly SignalHandler SIG_ERR = new SignalHandler (_ErrorHandler);
 471                 [CLSCompliant (false)]
 472                 public static readonly SignalHandler SIG_IGN = new SignalHandler (_IgnoreHandler);
 473
 474                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 475                                 SetLastError=true, EntryPoint="signal")]
 476                 private static extern IntPtr sys_signal (int signum, SignalHandler handler);
 477
 478                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 479                                 SetLastError=true, EntryPoint="signal")]
 480                 private static extern IntPtr sys_signal (int signum, IntPtr handler);
 481
 482                 [CLSCompliant (false)]
 483                 [Obsolete ("This is not safe; " +
 484                                 "use Mono.Unix.UnixSignal for signal delivery or SetSignalAction()")]
 485                 public static SignalHandler signal (Signum signum, SignalHandler handler)
 486                 {
 487                         int _sig = NativeConvert.FromSignum (signum);
 488
 489                         Delegate[] handlers = handler.GetInvocationList ();
 490                         for (int i = 0; i < handlers.Length; ++i) {
 491                                 Marshal.Prelink (handlers [i].Method);
 492                         }
 493
 494                         IntPtr r;
 495                         if (handler == SIG_DFL)
 496                                 r = sys_signal (_sig, _SIG_DFL);
 497                         else if (handler == SIG_ERR)
 498                                 r = sys_signal (_sig, _SIG_ERR);
 499                         else if (handler == SIG_IGN)
 500                                 r = sys_signal (_sig, _SIG_IGN);
 501                         else
 502                                 r = sys_signal (_sig, handler);
 503                         return TranslateHandler (r);
 504                 }
 505
 506                 private static SignalHandler TranslateHandler (IntPtr handler)
 507                 {
 508                         if (handler == _SIG_DFL)
 509                                 return SIG_DFL;
 510                         if (handler == _SIG_ERR)
 511                                 return SIG_ERR;
 512                         if (handler == _SIG_IGN)
 513                                 return SIG_IGN;
 514 #if NET_2_0
 515                         return (SignalHandler) Marshal.GetDelegateForFunctionPointer (handler, typeof(SignalHandler));
 516 #else
 517                         return new SignalHandler (new SignalWrapper (handler).InvokeSignalHandler);
 518 #endif
 519                 }
 520
 521                 public static int SetSignalAction (Signum signal, SignalAction action)
 522                 {
 523                         return SetSignalAction (NativeConvert.FromSignum (signal), action);
 524                 }
 525
 526                 public static int SetSignalAction (RealTimeSignum rts, SignalAction action)
 527                 {
 528                         return SetSignalAction (NativeConvert.FromRealTimeSignum (rts), action);
 529                 }
 530
 531                 private static int SetSignalAction (int signum, SignalAction action)
 532                 {
 533                         IntPtr handler = IntPtr.Zero;
 534                         switch (action) {
 535                                 case SignalAction.Default:
 536                                         handler = _SIG_DFL;
 537                                         break;
 538                                 case SignalAction.Ignore:
 539                                         handler = _SIG_IGN;
 540                                         break;
 541                                 case SignalAction.Error:
 542                                         handler = _SIG_ERR;
 543                                         break;
 544                                 default:
 545                                         throw new ArgumentException ("Invalid action value.", "action");
 546                         }
 547                         IntPtr r = sys_signal (signum, handler);
 548                         if (r == _SIG_ERR)
 549                                 return -1;
 550                         return 0;
 551                 }
 552
 553                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, EntryPoint="raise")]
 554                 private static extern int sys_raise (int sig);
 555
 556                 [CLSCompliant (false)]
 557                 public static int raise (Signum sig)
 558                 {
 559                         return sys_raise (NativeConvert.FromSignum (sig));
 560                 }
 561
 562                 public static int raise (RealTimeSignum rts)
 563                 {
 564                         return sys_raise (NativeConvert.FromRealTimeSignum (rts));
 565                 }
 566
 567                 //
 568                 // <stdio.h> -- COMPLETE except for :
 569                 //    - the scanf(3) family .
 570                 //    - vararg functions.
 571                 //    - Horribly unsafe functions (gets(3)).
 572                 //
 573                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 574                                 EntryPoint="Mono_Posix_Stdlib__IOFBF")]
 575                 private static extern int GetFullyBuffered ();
 576
 577                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 578                                 EntryPoint="Mono_Posix_Stdlib__IOLBF")]
 579                 private static extern int GetLineBuffered ();
 580
 581                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 582                                 EntryPoint="Mono_Posix_Stdlib__IONBF")]
 583                 private static extern int GetNonBuffered ();
 584
 585                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 586                                 EntryPoint="Mono_Posix_Stdlib_BUFSIZ")]
 587                 private static extern int GetBufferSize ();
 588
 589                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 590                                 EntryPoint="Mono_Posix_Stdlib_CreateFilePosition")]
 591                 internal static extern IntPtr CreateFilePosition ();
 592
 593                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 594                                 EntryPoint="Mono_Posix_Stdlib_DumpFilePosition")]
 595                 internal static extern int DumpFilePosition (StringBuilder buf, HandleRef handle, int len);
 596
 597                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 598                                 EntryPoint="Mono_Posix_Stdlib_EOF")]
 599                 private static extern int GetEOF ();
 600
 601                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 602                                 EntryPoint="Mono_Posix_Stdlib_FILENAME_MAX")]
 603                 private static extern int GetFilenameMax ();
 604
 605                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 606                                 EntryPoint="Mono_Posix_Stdlib_FOPEN_MAX")]
 607                 private static extern int GetFopenMax ();
 608
 609                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 610                                 EntryPoint="Mono_Posix_Stdlib_L_tmpnam")]
 611                 private static extern int GetTmpnamLength ();
 612
 613                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 614                                 EntryPoint="Mono_Posix_Stdlib_stdin")]
 615                 private static extern IntPtr GetStandardInput ();
 616
 617                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 618                                 EntryPoint="Mono_Posix_Stdlib_stdout")]
 619                 private static extern IntPtr GetStandardOutput ();
 620
 621                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 622                                 EntryPoint="Mono_Posix_Stdlib_stderr")]
 623                 private static extern IntPtr GetStandardError ();
 624
 625                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 626                                 EntryPoint="Mono_Posix_Stdlib_TMP_MAX")]
 627                 private static extern int GetTmpMax ();
 628
 629                 [CLSCompliant (false)]
 630                 public static readonly int    _IOFBF       = GetFullyBuffered ();
 631                 [CLSCompliant (false)]
 632                 public static readonly int    _IOLBF       = GetLineBuffered ();
 633                 [CLSCompliant (false)]
 634                 public static readonly int    _IONBF       = GetNonBuffered ();
 635                 [CLSCompliant (false)]
 636                 public static readonly int    BUFSIZ       = GetBufferSize ();
 637                 [CLSCompliant (false)]
 638                 public static readonly int    EOF          = GetEOF ();
 639                 [CLSCompliant (false)]
 640                 public static readonly int    FOPEN_MAX    = GetFopenMax ();
 641                 [CLSCompliant (false)]
 642                 public static readonly int    FILENAME_MAX = GetFilenameMax ();
 643                 [CLSCompliant (false)]
 644                 public static readonly int    L_tmpnam     = GetTmpnamLength ();
 645                 public static readonly IntPtr stderr       = GetStandardError ();
 646                 public static readonly IntPtr stdin        = GetStandardInput ();
 647                 public static readonly IntPtr stdout       = GetStandardOutput ();
 648                 [CLSCompliant (false)]
 649                 public static readonly int    TMP_MAX      = GetTmpMax ();
 650
 651                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 652                 public static extern int remove (
 653                                 [MarshalAs (UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(FileNameMarshaler))]
 654                                 string filename);
 655
 656                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 657                 public static extern int rename (
 658                                 [MarshalAs (UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(FileNameMarshaler))]
 659                                 string oldpath,
 660                                 [MarshalAs (UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(FileNameMarshaler))]
 661                                 string newpath);
 662
 663                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 664                 public static extern IntPtr tmpfile ();
 665
 666                 private static object tmpnam_lock = new object ();
 667
 668                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 669                                 SetLastError=true, EntryPoint="tmpnam")]
 670                 private static extern IntPtr sys_tmpnam (StringBuilder s);
 671
 672                 [Obsolete ("Syscall.mkstemp() should be preferred.")]
 673                 public static string tmpnam (StringBuilder s)
 674                 {
 675                         if (s != null && s.Capacity < L_tmpnam)
 676                                 throw new ArgumentOutOfRangeException ("s", "s.Capacity < L_tmpnam");
 677                         lock (tmpnam_lock) {
 678                                 IntPtr r = sys_tmpnam (s);
 679                                 return UnixMarshal.PtrToString (r);
 680                         }
 681                 }
 682
 683                 [Obsolete ("Syscall.mkstemp() should be preferred.")]
 684                 public static string tmpnam ()
 685                 {
 686                         lock (tmpnam_lock) {
 687                                 IntPtr r = sys_tmpnam (null);
 688                                 return UnixMarshal.PtrToString (r);
 689                         }
 690                 }
 691
 692                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 693                 public static extern int fclose (IntPtr stream);
 694
 695                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 696                 public static extern int fflush (IntPtr stream);
 697
 698                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 699                 public static extern IntPtr fopen (
 700                                 [MarshalAs (UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(FileNameMarshaler))]
 701                                 string path, string mode);
 702
 703                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 704                 public static extern IntPtr freopen (
 705                                 [MarshalAs (UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(FileNameMarshaler))]
 706                                 string path, string mode, IntPtr stream);
 707
 708                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 709                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_setbuf")]
 710                 public static extern int setbuf (IntPtr stream, IntPtr buf);
 711
 712                 [CLSCompliant (false)]
 713                 public static unsafe int setbuf (IntPtr stream, byte* buf)
 714                 {
 715                         return setbuf (stream, (IntPtr) buf);
 716                 }
 717
 718                 [CLSCompliant (false)]
 719                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 720                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_setvbuf")]
 721                 public static extern int setvbuf (IntPtr stream, IntPtr buf, int mode, ulong size);
 722
 723                 [CLSCompliant (false)]
 724                 public static unsafe int setvbuf (IntPtr stream, byte* buf, int mode, ulong size)
 725                 {
 726                         return setvbuf (stream, (IntPtr) buf, mode, size);
 727                 }
 728
 729                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 730                                 EntryPoint="fprintf")]
 731                 private static extern int sys_fprintf (IntPtr stream, string format, string message);
 732
 733                 public static int fprintf (IntPtr stream, string message)
 734                 {
 735                         return sys_fprintf (stream, "%s", message);
 736                 }
 737
 738                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
 739                                 "Use fprintf (IntPtr, string) instead.")]
 740                 public static int fprintf (IntPtr stream, string format, params object[] parameters)
 741                 {
 742                         object[] _parameters = new object[checked(parameters.Length+2)];
 743                         _parameters [0] = stream;
 744                         _parameters [1] = format;
 745                         Array.Copy (parameters, 0, _parameters, 2, parameters.Length);
 746                         return (int) XPrintfFunctions.fprintf (_parameters);
 747                 }
 748
 749                 /* SKIP: fscanf(3) */
 750
 751                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 752                                 EntryPoint="printf")]
 753                 private static extern int sys_printf (string format, string message);
 754
 755                 public static int printf (string message)
 756                 {
 757                         return sys_printf ("%s", message);
 758                 }
 759
 760                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
 761                                 "Use printf (string) instead.")]
 762                 public static int printf (string format, params object[] parameters)
 763                 {
 764                         object[] _parameters = new object[checked(parameters.Length+1)];
 765                         _parameters [0] = format;
 766                         Array.Copy (parameters, 0, _parameters, 1, parameters.Length);
 767                         return (int) XPrintfFunctions.printf (_parameters);
 768                 }
 769
 770                 /* SKIP: scanf(3) */
 771
 772                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 773                                 EntryPoint="Mono_Posix_Stdlib_snprintf")]
 774                 private static extern int sys_snprintf (StringBuilder s, ulong n,
 775                                 string format, string message);
 776
 777                 [CLSCompliant (false)]
 778                 public static int snprintf (StringBuilder s, ulong n, string message)
 779                 {
 780                         if (n > (ulong) s.Capacity)
 781                                 throw new ArgumentOutOfRangeException ("n", "n must be <= s.Capacity");
 782                         return sys_snprintf (s, n, "%s", message);
 783                 }
 784
 785                 public static int snprintf (StringBuilder s, string message)
 786                 {
 787                         return sys_snprintf (s, (ulong) s.Capacity, "%s", message);
 788                 }
 789
 790                 [CLSCompliant (false)]
 791                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
 792                                 "Use snprintf (StringBuilder, string) instead.")]
 793                 public static int snprintf (StringBuilder s, ulong n,
 794                                 string format, params object[] parameters)
 795                 {
 796                         if (n > (ulong) s.Capacity)
 797                                 throw new ArgumentOutOfRangeException ("n", "n must be <= s.Capacity");
 798
 799                         object[] _parameters = new object[checked(parameters.Length+3)];
 800                         _parameters [0] = s;
 801                         _parameters [1] = n;
 802                         _parameters [2] = format;
 803                         Array.Copy (parameters, 0, _parameters, 3, parameters.Length);
 804                         return (int) XPrintfFunctions.snprintf (_parameters);
 805                 }
 806
 807                 [CLSCompliant (false)]
 808                 [Obsolete ("Not necessarily portable due to cdecl restrictions.\n" +
 809                                 "Use snprintf (StringBuilder, string) instead.")]
 810                 public static int snprintf (StringBuilder s,
 811                                 string format, params object[] parameters)
 812                 {
 813                         object[] _parameters = new object[checked(parameters.Length+3)];
 814                         _parameters [0] = s;
 815                         _parameters [1] = (ulong) s.Capacity;
 816                         _parameters [2] = format;
 817                         Array.Copy (parameters, 0, _parameters, 3, parameters.Length);
 818                         return (int) XPrintfFunctions.snprintf (_parameters);
 819                 }
 820
 821                 /*
 822                  * SKIP:
 823                  *    sprintf(3)
 824                  *    sscanf(3)
 825                  *    vfprintf(3)
 826                  *    vfscanf(3)
 827                  *    vprintf(3)
 828                  *    vscanf(3)
 829                  *    vsnprintf(3)
 830                  *    vsprint(3)
 831                  *    vsscanf(3)
 832                  */
 833
 834                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 835                 public static extern int fgetc (IntPtr stream);
 836
 837                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
 838                                 SetLastError=true, EntryPoint="fgets")]
 839                 private static extern IntPtr sys_fgets (StringBuilder sb, int size, IntPtr stream);
 840
 841                 public static StringBuilder fgets (StringBuilder sb, int size, IntPtr stream)
 842                 {
 843                         IntPtr r = sys_fgets (sb, size, stream);
 844                         if (r == IntPtr.Zero)
 845                                 return null;
 846                         return sb;
 847                 }
 848
 849                 public static StringBuilder fgets (StringBuilder sb, IntPtr stream)
 850                 {
 851                         return fgets (sb, sb.Capacity, stream);
 852                 }
 853
 854                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 855                 public static extern int fputc (int c, IntPtr stream);
 856
 857                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 858                 public static extern int fputs (string s, IntPtr stream);
 859
 860                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 861                 public static extern int getc (IntPtr stream);
 862
 863                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 864                 public static extern int getchar ();
 865
 866                 /* SKIP: gets(3) */
 867
 868                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 869                 public static extern int putc (int c, IntPtr stream);
 870
 871                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 872                 public static extern int putchar (int c);
 873
 874                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 875                 public static extern int puts (string s);
 876
 877                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
 878                 public static extern int ungetc (int c, IntPtr stream);
 879
 880                 [CLSCompliant (false)]
 881                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 882                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fread")]
 883                 public static extern ulong fread (IntPtr ptr, ulong size, ulong nmemb, IntPtr stream);
 884
 885                 [CLSCompliant (false)]
 886                 public static unsafe ulong fread (void* ptr, ulong size, ulong nmemb, IntPtr stream)
 887                 {
 888                         return fread ((IntPtr) ptr, size, nmemb, stream);
 889                 }
 890
 891                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 892                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fread")]
 893                 private static extern ulong sys_fread ([Out] byte[] ptr,
 894                                 ulong size, ulong nmemb, IntPtr stream);
 895
 896                 [CLSCompliant (false)]
 897                 public static ulong fread (byte[] ptr, ulong size, ulong nmemb, IntPtr stream)
 898                 {
 899                         if ((size * nmemb) > (ulong) ptr.Length)
 900                                 throw new ArgumentOutOfRangeException ("nmemb");
 901                         return sys_fread (ptr, size, nmemb, stream);
 902                 }
 903
 904                 [CLSCompliant (false)]
 905                 public static ulong fread (byte[] ptr, IntPtr stream)
 906                 {
 907                         return fread (ptr, 1, (ulong) ptr.Length, stream);
 908                 }
 909
 910                 [CLSCompliant (false)]
 911                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 912                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fwrite")]
 913                 public static extern ulong fwrite (IntPtr ptr, ulong size, ulong nmemb, IntPtr stream);
 914
 915                 [CLSCompliant (false)]
 916                 public static unsafe ulong fwrite (void* ptr, ulong size, ulong nmemb, IntPtr stream)
 917                 {
 918                         return fwrite ((IntPtr) ptr, size, nmemb, stream);
 919                 }
 920
 921                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 922                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fwrite")]
 923                 private static extern ulong sys_fwrite (byte[] ptr,
 924                                 ulong size, ulong nmemb, IntPtr stream);
 925
 926                 [CLSCompliant (false)]
 927                 public static ulong fwrite (byte[] ptr, ulong size, ulong nmemb, IntPtr stream)
 928                 {
 929                         if ((size * nmemb) > (ulong) ptr.Length)
 930                                 throw new ArgumentOutOfRangeException ("nmemb");
 931                         return sys_fwrite (ptr, size, nmemb, stream);
 932                 }
 933
 934                 [CLSCompliant (false)]
 935                 public static ulong fwrite (byte[] ptr, IntPtr stream)
 936                 {
 937                         return fwrite (ptr, 1, (ulong) ptr.Length, stream);
 938                 }
 939
 940                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 941                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fgetpos")]
 942                 private static extern int sys_fgetpos (IntPtr stream, HandleRef pos);
 943
 944                 public static int fgetpos (IntPtr stream, FilePosition pos)
 945                 {
 946                         return sys_fgetpos (stream, pos.Handle);
 947                 }
 948
 949                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 950                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fseek")]
 951                 private static extern int sys_fseek (IntPtr stream, long offset, int origin);
 952
 953                 [CLSCompliant (false)]
 954                 public static int fseek (IntPtr stream, long offset, SeekFlags origin)
 955                 {
 956                         int _origin = NativeConvert.FromSeekFlags (origin);
 957                         return sys_fseek (stream, offset, _origin);
 958                 }
 959
 960                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 961                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_fsetpos")]
 962                 private static extern int sys_fsetpos (IntPtr stream, HandleRef pos);
 963
 964                 public static int fsetpos (IntPtr stream, FilePosition pos)
 965                 {
 966                         return sys_fsetpos (stream, pos.Handle);
 967                 }
 968
 969                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 970                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_ftell")]
 971                 public static extern long ftell (IntPtr stream);
 972
 973                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 974                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_rewind")]
 975                 public static extern int rewind (IntPtr stream);
 976
 977                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 978                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_clearerr")]
 979                 public static extern int clearerr (IntPtr stream);
 980
 981                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
 982                 public static extern int feof (IntPtr stream);
 983
 984                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
 985                 public static extern int ferror (IntPtr stream);
 986
 987                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
 988                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_perror")]
 989                 private static extern int perror (string s, int err);
 990
 991                 public static int perror (string s)
 992                 {
 993                         return perror (s, Marshal.GetLastWin32Error ());
 994                 }
 995
 996                 //
 997                 // <stdlib.h>
 998                 //
 999                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1000                                 EntryPoint="Mono_Posix_Stdlib_EXIT_FAILURE")]
1001                 private static extern int GetExitFailure();
1002
1003                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1004                                 EntryPoint="Mono_Posix_Stdlib_EXIT_SUCCESS")]
1005                 private static extern int GetExitSuccess ();
1006
1007                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1008                                 EntryPoint="Mono_Posix_Stdlib_MB_CUR_MAX")]
1009                 private static extern int GetMbCurMax ();
1010
1011                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1012                                 EntryPoint="Mono_Posix_Stdlib_RAND_MAX")]
1013                 private static extern int GetRandMax ();
1014
1015                 [CLSCompliant (false)]
1016                 public static readonly int  EXIT_FAILURE = GetExitFailure ();
1017                 [CLSCompliant (false)]
1018                 public static readonly int  EXIT_SUCCESS = GetExitSuccess ();
1019                 [CLSCompliant (false)]
1020                 public static readonly int  MB_CUR_MAX   = GetMbCurMax ();
1021                 [CLSCompliant (false)]
1022                 public static readonly int  RAND_MAX     = GetRandMax ();
1023
1024                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1025                 public static extern int rand ();
1026
1027                 [CLSCompliant (false)]
1028                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1029                 public static extern void srand (uint seed);
1030
1031                 // calloc(3):
1032                 //    void *calloc (size_t nmemb, size_t size);
1033                 [CLSCompliant (false)]
1034                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1035                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_calloc")]
1036                 public static extern IntPtr calloc (ulong nmemb, ulong size);
1037
1038                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1039                 public static extern void free (IntPtr ptr);
1040
1041                 // malloc(3):
1042                 //    void *malloc(size_t size);
1043                 [CLSCompliant (false)]
1044                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1045                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_malloc")]
1046                 public static extern IntPtr malloc (ulong size);
1047
1048                 // realloc(3):
1049                 //    void *realloc(void *ptr, size_t size);
1050                 [CLSCompliant (false)]
1051                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1052                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_realloc")]
1053                 public static extern IntPtr realloc (IntPtr ptr, ulong size);
1054
1055                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1056                 public static extern void abort ();
1057
1058                 /* SKIP: atexit(3) -- the GC should have collected most references by the
1059                  * time this runs, so no delegates should exist, making it pointless. */
1060
1061                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1062                 public static extern void exit (int status);
1063
1064                 [CLSCompliant (false)]
1065                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl)]
1066                 public static extern void _Exit (int status);
1067
1068                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, EntryPoint="getenv")]
1069                 private static extern IntPtr sys_getenv (string name);
1070
1071                 public static string getenv (string name)
1072                 {
1073                         IntPtr r = sys_getenv (name);
1074                         return UnixMarshal.PtrToString (r);
1075                 }
1076
1077                 [CLSCompliant (false)]
1078                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl, SetLastError=true)]
1079                 public static extern int system (string @string);
1080
1081                 //
1082                 // <string.h>
1083                 //
1084
1085                 private static object strerror_lock = new object ();
1086
1087                 [DllImport (LIBC, CallingConvention=CallingConvention.Cdecl,
1088                                 SetLastError=true, EntryPoint="strerror")]
1089                 private static extern IntPtr sys_strerror (int errnum);
1090
1091                 [CLSCompliant (false)]
1092                 public static string strerror (Errno errnum)
1093                 {
1094                         int e = NativeConvert.FromErrno (errnum);
1095                         lock (strerror_lock) {
1096                                 IntPtr r = sys_strerror (e);
1097                                 return UnixMarshal.PtrToString (r);
1098                         }
1099                 }
1100
1101                 // strlen(3):
1102                 //    size_t strlen(const char *s);
1103                 [CLSCompliant (false)]
1104                 [DllImport (MPH, CallingConvention=CallingConvention.Cdecl,
1105                                 SetLastError=true, EntryPoint="Mono_Posix_Stdlib_strlen")]
1106                 public static extern ulong strlen (IntPtr s);
1107         }
1108
1109         #endregion // Classes
1110 }
1111
1112 // vim: noexpandtab