4.3BSD - /usr/src/lib/libc/gen/initgroups.c

   1: /*
   2:  * Copyright (c) 1983 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #if defined(LIBC_SCCS) && !defined(lint)
   8: static char sccsid[] = "@(#)initgroups.c	5.3 (Berkeley) 4/27/86";
   9: #endif LIBC_SCCS and not lint
  10: 
  11: /*
  12:  * initgroups
  13:  */
  14: #include <stdio.h>
  15: #include <sys/param.h>
  16: #include <grp.h>
  17: 
  18: struct group *getgrent();
  19: 
  20: initgroups(uname, agroup)
  21:     char *uname;
  22:     int agroup;
  23: {
  24:     int groups[NGROUPS], ngroups = 0;
  25:     register struct group *grp;
  26:     register int i;
  27: 
  28:     if (agroup >= 0)
  29:         groups[ngroups++] = agroup;
  30:     setgrent();
  31:     while (grp = getgrent()) {
  32:         if (grp->gr_gid == agroup)
  33:             continue;
  34:         for (i = 0; grp->gr_mem[i]; i++)
  35:             if (!strcmp(grp->gr_mem[i], uname)) {
  36:                 if (ngroups == NGROUPS) {
  37: fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
  38:                     goto toomany;
  39:                 }
  40:                 groups[ngroups++] = grp->gr_gid;
  41:             }
  42:     }
  43: toomany:
  44:     endgrent();
  45:     if (setgroups(ngroups, groups) < 0) {
  46:         perror("setgroups");
  47:         return (-1);
  48:     }
  49:     return (0);
  50: }

Defined functions

Defined variables