@@ -1,119 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- *
- * Copyright (c) International Business Machines Corp., 2001
- *
- * 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.
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Copyright (c) International Business Machines Corp., 2001
+ * 07/2001 Ported by Wayne Boyer
+ * Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
*/
-/*
- * NAME
- * pipe06.c
- *
- * DESCRIPTION
- * Check what happens when the system runs out of pipes.
+/*\
+ * [Description]
*
- * ALGORITHM
- * Issue enough pipe calls to run the system out of pipes.
- * Check that we get EMFILE.
- *
- * USAGE: <for command-line>
- * pipe06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
- * where, -c n : Run n copies concurrently.
- * -e : Turn on errno logging.
- * -i n : Execute test n times.
- * -I x : Execute test for x seconds.
- * -P x : Pause for x seconds between iterations.
- * -t : Turn on syscall timing.
- *
- * HISTORY
- * 07/2001 Ported by Wayne Boyer
- *
- * RESTRICTIONS
- * None
+ * Verify that, pipe(2) syscall fails with errno EMFILE when
+ * limit on the number of open file descriptors has been reached.
*/
-#include <fcntl.h>
-#include <errno.h>
-#include "test.h"
-char *TCID = "pipe06";
-int TST_TOTAL = 1;
+#include "tst_test.h"
-int pipe_ret, pipes[2];
-void setup(void);
-void cleanup(void);
+static int fds[2];
+static int *opened_fds, num_opened_fds;
-int main(int ac, char **av)
+static void setup(void)
{
- int lc;
-
- tst_parse_opts(ac, av, NULL, NULL);
-
- setup();
-
- for (lc = 0; TEST_LOOPING(lc); lc++) {
+ int max_fds;
- /* reset tst_count in case we are looping */
- tst_count = 0;
+ max_fds = getdtablesize();
+ tst_res(TINFO, "getdtablesize() = %d", max_fds);
+ opened_fds = SAFE_MALLOC(max_fds * sizeof(int));
- TEST(pipe(pipes));
-
- if (TEST_RETURN != -1) {
- tst_resm(TFAIL, "call succeeded unexpectedly");
- }
-
- if (TEST_ERRNO != EMFILE) {
- tst_resm(TFAIL | TTERRNO, "pipe failed unexpectedly");
- } else {
- tst_resm(TPASS, "failed with EMFILE");
- }
-
- }
- cleanup();
- tst_exit();
+ do {
+ SAFE_PIPE(fds);
+ opened_fds[num_opened_fds++] = fds[0];
+ opened_fds[num_opened_fds++] = fds[1];
+ } while (fds[1] < max_fds - 2);
+ tst_res(TINFO, "Number of fds opened by pipe calls: %d", num_opened_fds);
}
-/*
- * setup() - performs all ONE TIME setup for this test.
- */
-void setup(void)
+static void run(void)
{
- int i, numb_fds;
-
- tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
- TEST_PAUSE;
-
- numb_fds = getdtablesize();
-
- for (i = 0; i < numb_fds; i++) {
- pipe_ret = pipe(pipes);
- if (pipe_ret < 0) {
- if (errno != EMFILE) {
- tst_brkm(TBROK | TTERRNO, cleanup,
- "didn't get EMFILE");
- }
- break;
- }
- }
+ TST_EXP_FAIL(pipe(fds), EMFILE);
}
-/*
- * cleanup() - performs all ONE TIME cleanup for this test at
- * completion or premature exit.
- */
-void cleanup(void)
+static void cleanup(void)
{
+ for (int i = 0; i < num_opened_fds; i++)
+ SAFE_CLOSE(opened_fds[i]);
}
+
+static struct tst_test test = {
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = run
+};
Signed-off-by: Avinesh Kumar <akumar@suse.de> --- testcases/kernel/syscalls/pipe/pipe06.c | 133 ++++++------------------ 1 file changed, 33 insertions(+), 100 deletions(-)