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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)initgroups.c 5.7 (Berkeley) 2/23/91";
- #endif /* LIBC_SCCS and not lint */
-
- /*
- * initgroups
- */
- #include <sys/param.h>
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include <grp.h>
-
- struct group *getgrent();
-
- int
- initgroups(uname, agroup)
- const char *uname;
- int agroup;
- {
- int groups[NGROUPS], ngroups = 0;
- register struct group *grp;
- register int i;
-
- /*
- * If installing primary group, duplicate it;
- * the first element of groups is the effective gid
- * and will be overwritten when a setgid file is executed.
- */
- if (agroup >= 0) {
- groups[ngroups++] = agroup;
- groups[ngroups++] = agroup;
- }
- setgrent();
- while (grp = getgrent()) {
- if (grp->gr_gid == agroup)
- continue;
- for (i = 0; grp->gr_mem[i]; i++)
- if (!strcmp(grp->gr_mem[i], uname)) {
- if (ngroups == NGROUPS) {
- fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
- goto toomany;
- }
- groups[ngroups++] = grp->gr_gid;
- }
- }
- toomany:
- endgrent();
- if (setgroups(ngroups, groups) < 0) {
- perror("setgroups");
- return (-1);
- }
- return (0);
- }
-