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- /* Copyright (C) 1991 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <stddef.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <grp.h>
-
- #ifdef YP
- #include <rpcsvc/yp_prot.h>
- #include <rpcsvc/ypclnt.h>
- extern int __yp_check(char **) ;
- extern struct group * __nis_parsegroupdata(char *, void *);
- extern struct group * __nis_getgrnam(const char *, char **, void *);
- static struct group * __nis_getgrgid(gid_t, void *);
- #endif
-
- /* Search for an entry with a matching group ID. */
- struct group *
- DEFUN(getgrgid, (gid), register gid_t gid)
- {
- static PTR info = NULL;
- register FILE *stream;
- register struct group *g;
-
- if (info == NULL)
- {
- info = __grpalloc();
- if (info == NULL)
- return NULL;
- }
-
- stream = __grpopen();
- if (stream == NULL)
- return NULL;
-
- while ((g = __grpread(stream, info)) != NULL)
- {
- if (g->gr_gid == (gid_t) gid)
- break;
- #ifdef YP
- /*
- * Handle +group/-group entries.
- */
- if ('-' == g->gr_name[0] && '\0' != g->gr_name[1])
- {
- g = __nis_getgrnam(g->gr_name + 1, NULL, info);
- if (g->gr_gid == gid)
- return NULL;
- continue;
- }
- if ('+' == g->gr_name[0] && '\0' != g->gr_name[1])
- {
- struct group *grp = g;
- g = __nis_getgrnam(g->gr_name + 1, g->gr_mem, info);
- if (NULL != g && g->gr_gid == gid)
- {
- if (NULL != grp->gr_passwd && '\0' != grp->gr_passwd[0])
- g->gr_passwd = grp->gr_passwd;
- break;
- }
- continue;
- }
- if (0 == strcmp(g->gr_name, "+"))
- {
- g = __nis_getgrgid(gid, info);
- break;
- }
- #endif
- }
- (void) fclose(stream);
- return g;
- }
-
- #ifdef YP
- static struct group *
- __nis_getgrgid(gid_t gid, void *info)
- {
- static char *nisdomain = NULL;
- char *outkey;
- int status, outkeylen ;
- struct group *gptr = NULL;
-
- if (1 == __yp_check(NULL))
- {
- char gidbuf[20] ;
- if (NULL == nisdomain)
- yp_get_default_domain(&nisdomain);
- sprintf(gidbuf, "%d", gid) ;
- status = yp_match(nisdomain, "group.bygid",
- gidbuf, strlen(gidbuf),
- &outkey, &outkeylen) ;
- if (0 != status)
- return NULL;
- gptr = __nis_parsegroupdata(outkey, info) ;
- free (outkey);
- return (gptr);
- }
- return NULL;
- }
- #endif
-