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Annotation of 43BSDReno/lib/libc/gen/initgroups.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(LIBC_SCCS) && !defined(lint)
                     21: static char sccsid[] = "@(#)initgroups.c       5.6 (Berkeley) 6/1/90";
                     22: #endif /* LIBC_SCCS and not lint */
                     23: 
                     24: /*
                     25:  * initgroups
                     26:  */
                     27: #include <stdio.h>
                     28: #include <sys/param.h>
                     29: #include <grp.h>
                     30: 
                     31: struct group *getgrent();
                     32: 
                     33: initgroups(uname, agroup)
                     34:        char *uname;
                     35:        int agroup;
                     36: {
                     37:        int groups[NGROUPS], ngroups = 0;
                     38:        register struct group *grp;
                     39:        register int i;
                     40: 
                     41:        /*
                     42:         * If installing primary group, duplicate it;
                     43:         * the first element of groups is the effective gid
                     44:         * and will be overwritten when a setgid file is executed.
                     45:         */
                     46:        if (agroup >= 0) {
                     47:                groups[ngroups++] = agroup;
                     48:                groups[ngroups++] = agroup;
                     49:        }
                     50:        setgrent();
                     51:        while (grp = getgrent()) {
                     52:                if (grp->gr_gid == agroup)
                     53:                        continue;
                     54:                for (i = 0; grp->gr_mem[i]; i++)
                     55:                        if (!strcmp(grp->gr_mem[i], uname)) {
                     56:                                if (ngroups == NGROUPS) {
                     57: fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
                     58:                                        goto toomany;
                     59:                                }
                     60:                                groups[ngroups++] = grp->gr_gid;
                     61:                        }
                     62:        }
                     63: toomany:
                     64:        endgrent();
                     65:        if (setgroups(ngroups, groups) < 0) {
                     66:                perror("setgroups");
                     67:                return (-1);
                     68:        }
                     69:        return (0);
                     70: }

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