/*
- * Copyright (C) 2002 by Martin Pool
- *
+ * 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 as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
+ * 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, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/**
- * @file getgroups.c
*
- * 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.
- **/
+ * 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"
-#ifndef NGROUPS
-/* It ought to be defined, but just in case. */
-# define NGROUPS 32
-#endif
-
-int
-main(UNUSED(int argc), UNUSED(char *argv[]))
+ int main(UNUSED(int argc), UNUSED(char *argv[]))
{
int n, i;
- gid_t list[NGROUPS];
+ gid_t *list;
+ gid_t gid = MY_GID();
+ int gid_in_list = 0;
- if ((n = getgroups(NGROUPS, list)) == -1) {
+#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);
+ }
- for (i = 0; i < n; i++)
- printf("%u ", list[i]);
+#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;
}