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/*
* Print out the gids of all groups for the current user. This is like
* `id -G` on Linux, but it's too hard to find a portable equivalent.
*
* Copyright (C) 2002 Martin Pool
* Copyright (C) 2003-2020 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
int main(UNUSED(int argc), UNUSED(char *argv[]))
{
int n, i;
gid_t *list;
gid_t gid = MY_GID();
int gid_in_list = 0;
#ifdef HAVE_GETGROUPS
if ((n = getgroups(0, NULL)) < 0) {
perror("getgroups");
return 1;
}
#else
n = 0;
#endif
list = (gid_t*)malloc(sizeof (gid_t) * (n + 1));
if (!list) {
fprintf(stderr, "out of memory!\n");
exit(1);
}
#ifdef HAVE_GETGROUPS
if (n > 0)
n = getgroups(n, list);
#endif
for (i = 0; i < n; i++) {
printf("%lu ", (unsigned long)list[i]);
if (list[i] == gid)
gid_in_list = 1;
}
/* The default gid might not be in the list on some systems. */
if (!gid_in_list)
printf("%lu", (unsigned long)gid);
printf("\n");
return 0;
}
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