BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.bin / groups / groups.c

/*
* Copyright (c) 1980 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.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)groups.c    5.4 (Berkeley) 6/1/90";
#endif /* not lint */

/*
* groups
*/

#include <sys/param.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>

int     groups[NGROUPS];

main(argc, argv)
       int argc;
       char *argv[];
{
       int ngroups, i;
       char *sep = "";
       struct group *gr;

       if (argc > 1)
               showgroups(argv[1]);
       ngroups = getgroups(NGROUPS, groups);
       for (i = 0; i < ngroups; i++) {
               gr = getgrgid(groups[i]);
               if (gr == NULL)
                       printf("%s%d", sep, groups[i]);
               else
                       printf("%s%s", sep, gr->gr_name);
               sep = " ";
       }
       printf("\n");
       exit(0);
}

showgroups(user)
       register char *user;
{
       register struct group *gr;
       register struct passwd *pw;
       register char **cp;
       char *sep = "";

       if ((pw = getpwnam(user)) == NULL) {
               fprintf(stderr, "groups: no such user.\n");
               exit(1);
       }
       while (gr = getgrent()) {
               if (pw->pw_gid == gr->gr_gid) {
                       printf("%s%s", sep, gr->gr_name);
                       sep = " ";
                       continue;
               }
               for (cp = gr->gr_mem; cp && *cp; cp++)
                       if (strcmp(*cp, user) == 0) {
                               printf("%s%s", sep, gr->gr_name);
                               sep = " ";
                               break;
                       }
       }
       printf("\n");
       exit(0);
}