2 * <grp.h> wrapper functions.
5 * Jonathan Pryor (jonpryor@vt.edu)
7 * Copyright (C) 2004-2005 Jonathan Pryor
10 #include <sys/types.h>
11 #include <sys/param.h>
17 #include <unistd.h> /* for setgroups on Mac OS X */
25 count_members (char **gr_mem, int *count, size_t *mem)
30 // ensure that later (*mem)+1 doesn't result in integer overflow
31 if (*mem > INT_MAX - 1)
34 for (cur = *gr_mem; cur != NULL; cur = *++gr_mem) {
38 if (!(len < INT_MAX - ((*mem) + 1)))
47 copy_group (struct Mono_Posix_Syscall__Group *to, struct group *from)
49 size_t nlen, plen, buflen;
53 to->gr_gid = from->gr_gid;
60 nlen = strlen (from->gr_name);
61 plen = strlen (from->gr_passwd);
65 if (!(nlen < INT_MAX - buflen))
69 if (!(plen < INT_MAX - buflen))
74 count_members (from->gr_mem, &count, &buflen);
76 to->_gr_nmem_ = count;
77 cur = to->_gr_buf_ = (char*) malloc (buflen);
78 to_mem = to->gr_mem = malloc (sizeof(char*)*(count+1));
79 if (to->_gr_buf_ == NULL || to->gr_mem == NULL) {
85 to->gr_name = strcpy (cur, from->gr_name);
87 to->gr_passwd = strcpy (cur, from->gr_passwd);
90 for (i = 0; i != count; ++i) {
91 to_mem [i] = strcpy (cur, from->gr_mem[i]);
92 cur += (strlen (from->gr_mem[i])+1);
100 Mono_Posix_Syscall_getgrnam (const char *name, struct Mono_Posix_Syscall__Group *gbuf)
110 _gbuf = getgrnam (name);
114 if (copy_group (gbuf, _gbuf) == -1) {
122 Mono_Posix_Syscall_getgrgid (mph_gid_t gid, struct Mono_Posix_Syscall__Group *gbuf)
132 _gbuf = getgrgid (gid);
136 if (copy_group (gbuf, _gbuf) == -1) {
143 #ifdef HAVE_GETGRNAM_R
145 Mono_Posix_Syscall_getgrnam_r (const char *name,
146 struct Mono_Posix_Syscall__Group *gbuf,
163 buf2 = realloc (buf, buflen *= 2);
171 } while ((r = getgrnam_r (name, &_grbuf, buf, buflen, (struct group**) gbufp)) &&
174 /* On Solaris, this function returns 0 even if the entry was not found */
175 if (r == 0 && !(*gbufp))
178 if (r == 0 && copy_group (gbuf, &_grbuf) == -1)
184 #endif /* ndef HAVE_GETGRNAM_R */
186 #ifdef HAVE_GETGRGID_R
188 Mono_Posix_Syscall_getgrgid_r (mph_gid_t gid,
189 struct Mono_Posix_Syscall__Group *gbuf,
206 buf2 = realloc (buf, buflen *= 2);
214 } while ((r = getgrgid_r (gid, &_grbuf, buf, buflen, (struct group**) gbufp)) &&
217 /* On Solaris, this function returns 0 even if the entry was not found */
218 if (r == 0 && !(*gbufp))
221 if (r == 0 && copy_group (gbuf, &_grbuf) == -1)
227 #endif /* ndef HAVE_GETGRGID_R */
230 Mono_Posix_Syscall_getgrent (struct Mono_Posix_Syscall__Group *grbuf)
244 if (copy_group (grbuf, gr) == -1) {
251 #ifdef HAVE_FGETGRENT
253 Mono_Posix_Syscall_fgetgrent (void *stream, struct Mono_Posix_Syscall__Group *grbuf)
263 gr = fgetgrent ((FILE*) stream);
267 if (copy_group (grbuf, gr) == -1) {
273 #endif /* ndef HAVE_FGETGRENT */
276 Mono_Posix_Syscall_setgroups (mph_size_t size, mph_gid_t *list)
278 mph_return_if_size_t_overflow (size);
279 return setgroups ((size_t) size, list);
283 Mono_Posix_Syscall_setgrent (void)
288 } while (errno == EINTR);
289 mph_return_if_val_in_list5(errno, EIO, EMFILE, ENFILE, ENOMEM, ERANGE);
294 Mono_Posix_Syscall_endgrent (void)