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Annotation of 43BSD/lib/libc/gen/initgroups.c, revision 1.1

1.1     ! root        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: }

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