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Annotation of embedaddon/rsync/getgroups.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Print out the gids of all groups for the current user.  This is like
        !             3:  * `id -G` on Linux, but it's too hard to find a portable equivalent.
        !             4:  *
        !             5:  * Copyright (C) 2002 Martin Pool
        !             6:  * Copyright (C) 2003-2008 Wayne Davison
        !             7:  *
        !             8:  * This program is free software; you can redistribute it and/or modify
        !             9:  * it under the terms of the GNU General Public License version 3 as
        !            10:  * published by the Free Software Foundation.
        !            11:  *
        !            12:  * This program is distributed in the hope that it will be useful,
        !            13:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15:  * GNU General Public License for more details.
        !            16:  *
        !            17:  * You should have received a copy of the GNU General Public License along
        !            18:  * with this program; if not, visit the http://fsf.org website.
        !            19:  */
        !            20: 
        !            21: #include "rsync.h"
        !            22: 
        !            23: int
        !            24: main(UNUSED(int argc), UNUSED(char *argv[]))
        !            25: {
        !            26:        int n, i;
        !            27:        gid_t *list;
        !            28:        gid_t gid = MY_GID();
        !            29:        int gid_in_list = 0;
        !            30: 
        !            31: #ifdef HAVE_GETGROUPS
        !            32:        if ((n = getgroups(0, NULL)) < 0) {
        !            33:                perror("getgroups");
        !            34:                return 1;
        !            35:        }
        !            36: #else
        !            37:        n = 0;
        !            38: #endif
        !            39: 
        !            40:        list = (gid_t*)malloc(sizeof (gid_t) * (n + 1));
        !            41:        if (!list) {
        !            42:                fprintf(stderr, "out of memory!\n");
        !            43:                exit(1);
        !            44:        }
        !            45: 
        !            46: #ifdef HAVE_GETGROUPS
        !            47:        if (n > 0)
        !            48:                n = getgroups(n, list);
        !            49: #endif
        !            50: 
        !            51:        for (i = 0; i < n; i++)  {
        !            52:                printf("%lu ", (unsigned long)list[i]);
        !            53:                if (list[i] == gid)
        !            54:                        gid_in_list = 1;
        !            55:        }
        !            56:        /* The default gid might not be in the list on some systems. */
        !            57:        if (!gid_in_list)
        !            58:                printf("%lu", (unsigned long)gid);
        !            59:        printf("\n");
        !            60: 
        !            61:        return 0;
        !            62: }