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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
commit70e9163c9c18e995515598085cb824e554eb7ae7 (patch)
treea42dc8b2a6c031354bf31472de888bfc8a060132 /gnulib-tests/test-getgroups.c
parentcbf5993c43f49281173f185863577d86bfac6eae (diff)
downloadcoreutils-tarball-master.tar.gz
Diffstat (limited to 'gnulib-tests/test-getgroups.c')
-rw-r--r--gnulib-tests/test-getgroups.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/gnulib-tests/test-getgroups.c b/gnulib-tests/test-getgroups.c
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+/* Tests of getgroups.
+ Copyright (C) 2009-2016 Free Software Foundation, Inc.
+
+ 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 3 of the License, or
+ (at your option) any later version.
+
+ 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, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009. */
+
+#include <config.h>
+
+#include <unistd.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (getgroups, int, (int, gid_t[]));
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "macros.h"
+
+int
+main (int argc, char **argv _GL_UNUSED)
+{
+ int result;
+ gid_t *groups;
+
+ errno = 0;
+ result = getgroups (0, NULL);
+ if (result == -1 && errno == ENOSYS)
+ {
+ fputs ("skipping test: no support for groups\n", stderr);
+ return 77;
+ }
+ ASSERT (0 <= result);
+ ASSERT (result + 1 < SIZE_MAX / sizeof *groups);
+ groups = malloc ((result + 1) * sizeof *groups);
+ ASSERT (groups);
+ groups[result] = -1;
+ /* Check for EINVAL handling. Not all processes have supplemental
+ groups, and getgroups does not have to return the effective gid,
+ so a result of 0 is reasonable. Also, we can't test for EINVAL
+ if result is 1, because of how getgroups treats 0. */
+ if (1 < result)
+ {
+ errno = 0;
+ ASSERT (getgroups (result - 1, groups) == -1);
+ ASSERT (errno == EINVAL);
+ }
+ ASSERT (getgroups (result, groups) == result);
+ ASSERT (getgroups (result + 1, groups) == result);
+ ASSERT (groups[result] == -1);
+ errno = 0;
+ ASSERT (getgroups (-1, NULL) == -1);
+ ASSERT (errno == EINVAL);
+
+ /* The automated unit test, with no arguments, ends here. However,
+ for debugging purposes, you can pass a command-line argument to
+ list the returned groups. */
+ if (1 < argc)
+ {
+ int i;
+ for (i = 0; i < result; i++)
+ printf ("%d\n", (int) groups[i]);
+ }
+ return 0;
+}