@@ -1,41 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Copyright (c) International Business Machines Corp., 2002
- * ported from SPIE, section2/iosuite/dup1.c, by Airong Zhang
- * Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
- *
- * 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., 2002
+ * Ported from SPIE, section2/iosuite/dup1.c, by Airong Zhang
+ * Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
+ * Copyright (c) Linux Test Project, 2003-2024
*/
-/*
- WHAT: Does dup return -1 on the 21st file?
- HOW: Create up to _NFILE (20) files and check for -1 return on the
- next attempt
- Should check NOFILE as well as _NFILE. 19-Jun-84 Dale.
-*/
+/*\
+ * [Description]
+ *
+ * Test for dup(2) syscall with max open file descriptors.
+ */
-#include <stdio.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include "test.h"
+#include <stdlib.h>
+#include "tst_test.h"
-char *TCID = "dup06";
-int TST_TOTAL = 1;
+static int *pfildes;
+static int minfd, maxfd, freefds;
+static char pfilname[40];
static int cnt_free_fds(int maxfd)
{
@@ -45,70 +27,53 @@ static int cnt_free_fds(int maxfd)
if (fcntl(maxfd, F_GETFD) == -1 && errno == EBADF)
freefds++;
- return (freefds);
+ return freefds;
}
-static void setup(void);
-static void cleanup(void);
-
-int main(int ac, char **av)
+static void setup(void)
{
- int *fildes, i;
- int min;
- int freefds;
- int lc;
- const char *pfilname = "dup06";
-
- tst_parse_opts(ac, av, NULL, NULL);
-
- setup();
-
- min = getdtablesize();
- freefds = cnt_free_fds(min);
- fildes = malloc((min + 5) * sizeof(int));
-
- for (i = 0; i < min + 5; i++)
- fildes[i] = 0;
-
- for (lc = 0; TEST_LOOPING(lc); lc++) {
- unlink(pfilname);
-
- if ((fildes[0] = creat(pfilname, 0666)) == -1) {
- tst_resm(TFAIL, "Cannot open first file");
- } else {
- for (i = 1; i < min + 5; i++) {
- if ((fildes[i] = dup(fildes[i - 1])) == -1)
- break;
- }
- if (i < freefds) {
- tst_resm(TFAIL, "Not enough files duped");
- } else if (i > freefds) {
- tst_resm(TFAIL, "Too many files duped");
- } else {
- tst_resm(TPASS, "Test passed.");
- }
- }
-
- unlink(pfilname);
-
- for (i = 0; i < min + 5; i++) {
- if (fildes[i] != 0 && fildes[i] != -1)
- close(fildes[i]);
-
- fildes[i] = 0;
- }
- }
-
- cleanup();
- tst_exit();
+ minfd = getdtablesize(); /* get number of files allowed open */
+ maxfd = minfd + 5;
+ freefds = cnt_free_fds(minfd);
+ pfildes = SAFE_MALLOC(maxfd * sizeof(int));
+ memset(pfildes, -1, maxfd * sizeof(int));
+ sprintf(pfilname, "./dup06.%d\n", getpid());
}
-static void setup(void)
+static void cleanup(void)
{
- tst_tmpdir();
+ if (pfildes != NULL)
+ free(pfildes);
}
-static void cleanup(void)
+static void run(void)
{
- tst_rmdir();
+ int i;
+
+ pfildes[0] = SAFE_CREAT(pfilname, 0666);
+ for (i = 1; i < maxfd; i++) {
+ pfildes[i] = dup(pfildes[i - 1]);
+ if (pfildes[i] == -1)
+ break;
+ }
+ if (i < freefds)
+ tst_res(TFAIL, "Not enough files duped");
+ else if (i > freefds)
+ tst_res(TFAIL, "Too many files duped");
+ else
+ tst_res(TPASS, "Test passed.");
+
+ SAFE_UNLINK(pfilname);
+
+ for (i = 0; i < maxfd; i++) {
+ if (pfildes[i] != 0 && pfildes[i] != -1)
+ SAFE_CLOSE(pfildes[i]);
+ }
}
+
+static struct tst_test test = {
+ .needs_tmpdir = 1,
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+};
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com> --- testcases/kernel/syscalls/dup/dup06.c | 145 ++++++++++---------------- 1 file changed, 55 insertions(+), 90 deletions(-)