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Annotation of 42BSD/lib/libc/gen/initgroups.c, revision 1.1

1.1     ! root        1: /*     initgroups.c    4.4     83/06/17        */
        !             2: 
        !             3: /*
        !             4:  * initgroups
        !             5:  */
        !             6: #include <stdio.h>
        !             7: #include <sys/param.h>
        !             8: #include <grp.h>
        !             9: 
        !            10: struct group *getgrent();
        !            11: 
        !            12: initgroups(uname, agroup)
        !            13:        char *uname;
        !            14:        int agroup;
        !            15: {
        !            16:        int groups[NGROUPS], ngroups = 0;
        !            17:        register struct group *grp;
        !            18:        register int i;
        !            19: 
        !            20:        if (agroup >= 0)
        !            21:                groups[ngroups++] = agroup;
        !            22:        setgrent();
        !            23:        while (grp = getgrent()) {
        !            24:                if (grp->gr_gid == agroup)
        !            25:                        continue;
        !            26:                for (i = 0; grp->gr_mem[i]; i++)
        !            27:                        if (!strcmp(grp->gr_mem[i], uname)) {
        !            28:                                if (ngroups == NGROUPS) {
        !            29: fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
        !            30:                                        goto toomany;
        !            31:                                }
        !            32:                                groups[ngroups++] = grp->gr_gid;
        !            33:                        }
        !            34:        }
        !            35: toomany:
        !            36:        endgrent();
        !            37:        if (setgroups(ngroups, groups) < 0) {
        !            38:                perror("setgroups");
        !            39:                return (1);
        !            40:        }
        !            41:        return (0);
        !            42: }

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