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63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/*
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* Print out the gids of all groups for the current user. This is like
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* `id -G` on Linux, but it's too hard to find a portable equivalent.
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*
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* Copyright (C) 2002 Martin Pool
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* Copyright (C) 2003-2014 Wayne Davison
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, visit the http://fsf.org website.
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*/
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#include "rsync.h"
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int
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main(UNUSED(int argc), UNUSED(char *argv[]))
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{
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int n, i;
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gid_t *list;
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gid_t gid = MY_GID();
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int gid_in_list = 0;
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#ifdef HAVE_GETGROUPS
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if ((n = getgroups(0, NULL)) < 0) {
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perror("getgroups");
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return 1;
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}
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#else
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n = 0;
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#endif
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list = (gid_t*)malloc(sizeof (gid_t) * (n + 1));
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if (!list) {
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fprintf(stderr, "out of memory!\n");
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exit(1);
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}
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#ifdef HAVE_GETGROUPS
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if (n > 0)
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n = getgroups(n, list);
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#endif
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for (i = 0; i < n; i++) {
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printf("%lu ", (unsigned long)list[i]);
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if (list[i] == gid)
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gid_in_list = 1;
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}
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/* The default gid might not be in the list on some systems. */
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if (!gid_in_list)
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printf("%lu", (unsigned long)gid);
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printf("\n");
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return 0;
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}
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