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- /* getugroups.c -- return a list of the groups a user is in
- Copyright (C) 1990, 1991 Free Software Foundation.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Written by David MacKenzie. */
-
- #ifdef HAVE_CONFIG_H
- #if defined (CONFIG_BROKETS)
- /* We use <config.h> instead of "config.h" so that a compilation
- using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
- (which it would do because it found this file in $srcdir). */
- #include <config.h>
- #else
- #include "config.h"
- #endif
- #endif
-
- #include <sys/types.h>
- #include <grp.h>
-
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- /* setgrent, getgrent, and endgrent are not specified by POSIX.1,
- so header files might not declare them.
- If you don't have them at all, we can't implement this function.
- You lose! */
- struct group *getgrent ();
-
- #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
- #include <string.h>
- #else
- #include <strings.h>
- #endif
-
- /* Like `getgroups', but for user USERNAME instead of for
- the current process. */
-
- int
- getugroups (maxcount, grouplist, username)
- int maxcount;
- GETGROUPS_T *grouplist;
- char *username;
- {
- struct group *grp;
- register char **cp;
- register int count = 0;
-
- setgrent ();
- while ((grp = getgrent ()) != 0)
- for (cp = grp->gr_mem; *cp; ++cp)
- if (!strcmp (username, *cp))
- {
- if (maxcount != 0)
- {
- if (count >= maxcount)
- {
- endgrent ();
- return count;
- }
- grouplist[count] = grp->gr_gid;
- }
- count++;
- }
- endgrent ();
- return count;
- }
-