[LTP] [PATCH] syscalls/fork01:Convert into new api
Liao Huangjie
liaohj.jy@fujitsu.com
Thu Sep 15 03:21:42 CEST 2022
From: Huangjie Liao <liaohj.jy@fujitsu.com>
Signed-off-by: Huangjie Liao <liaohj.jy@fujitsu.com>
---
testcases/kernel/syscalls/fork/fork01.c | 253 ++++++------------------
1 file changed, 55 insertions(+), 198 deletions(-)
diff --git a/testcases/kernel/syscalls/fork/fork01.c b/testcases/kernel/syscalls/fork/fork01.c
index 00d7c45c4..8ba712805 100644
--- a/testcases/kernel/syscalls/fork/fork01.c
+++ b/testcases/kernel/syscalls/fork/fork01.c
@@ -1,91 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
+ * Author: Kathy Olmsted
+ * Co-Pilot: Steve Shaw
+ */
+
+/*\
+ *[Description]
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
- *
- *
- * OS Test - Silicon Graphics, Inc.
- * TEST IDENTIFIER : fork01
- * EXECUTED BY : anyone
- * TEST TITLE : Basic test for fork(2)
- * PARENT DOCUMENT : frktds02
- * TEST CASE TOTAL : 2
- * WALL CLOCK TIME : 1
- * CPU TYPES : ALL
- * AUTHOR : Kathy Olmsted
- * CO-PILOT : Steve Shaw
- * DATE STARTED : 06/17/92
- * INITIAL RELEASE : UNICOS 7.0
- * TEST CASES
- * 1.) fork returns without error
- * 2.) fork returns the pid of the child
- * INPUT SPECIFICATIONS
- * The standard options for system call tests are accepted.
- * (See the parse_opts(3) man page).
- * OUTPUT SPECIFICATIONS
- * DURATION
- * Terminates - with frequency and infinite modes.
- * SIGNALS
- * Uses SIGUSR1 to pause before test if option set.
- * (See the parse_opts(3) man page).
- * RESOURCES
- * None
- * ENVIRONMENTAL NEEDS
- * No run-time environmental needs.
- * SPECIAL PROCEDURAL REQUIREMENTS
- * None
- * INTERCASE DEPENDENCIES
- * None
- * DETAILED DESCRIPTION
- * Setup:
- * Setup signal handling.
- * Pause for SIGUSR1 if option specified.
- * Test:
- * Loop if the proper options are given.
- * fork()
- * Check return code, if system call failed (return=-1)
- * Log the errno and Issue a FAIL message.
- * Otherwise, Issue a PASS message.
- * CHILD:
- * determine PID
- * write to PID to a file and close the file
- * exit
- * PARENT:
- * wait for child to exit
- * read child PID from file
- * compare child PID to fork() return code and report
- * results
- *
- * Cleanup:
- * Print errno log and/or timing stats if options given
+ * This case tests fork()'s basic function.
*/
+#define _GNU_SOURCE
#include <errno.h>
#include <string.h>
#include <signal.h>
@@ -93,142 +19,73 @@
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
-#include "test.h"
+#include <unistd.h>
+#include <stdio.h>
+#include "tst_test.h"
#define KIDEXIT 42
-static void setup();
-static void cleanup();
-
#define LINE_SZ 20
#define FILENAME "childpid"
-char *TCID = "fork01";
-int TST_TOTAL = 2;
+static char buf[LINE_SZ];
-/*
- * child_pid - the child side of the test
- * determine the PID and write to a file
- */
-static void child_pid(void)
+static void do_child(void)
{
+ int fd;
- int fildes;
- char tmp_line[LINE_SZ];
-
- fildes = creat(FILENAME, 0700);
- sprintf(tmp_line, "%d\n", getpid());
- write(fildes, tmp_line, LINE_SZ);
- close(fildes);
-
+ fd = creat(FILENAME, 0700);
+ sprintf(buf, "%d\n", getpid());
+ SAFE_WRITE(1, fd, buf, LINE_SZ);
+ SAFE_CLOSE(fd);
}
-/*
- * parent_pid - the parent side of the test
- * read the value determined by the child
- * compare and report results
- */
-static void parent_pid(void)
+static void check_child_pid(int pid)
{
+ int fd;
+ pid_t child_pid;
- int fildes;
- char tmp_line[LINE_SZ];
- pid_t child_id;
+ fd = SAFE_OPEN(FILENAME, O_RDWR);
+ SAFE_READ(1, fd, buf, LINE_SZ);
- fildes = open(FILENAME, O_RDWR);
- if (fildes == -1) {
- tst_brkm(TBROK, cleanup,
- "parent open failed. errno: %d (%s)\n",
- errno, strerror(errno));
+ child_pid = atoi(buf);
+ if (child_pid != pid) {
+ tst_res(TFAIL, "child reported a pid of %d. parent received %d from fork()",
+ child_pid, pid);
} else {
- if (read(fildes, tmp_line, LINE_SZ) == 0) {
- tst_brkm(TBROK, cleanup,
- "fork(): parent failed to read PID from file errno: %d (%s)",
- errno, strerror(errno));
- } else {
- child_id = atoi(tmp_line);
- if (TEST_RETURN != child_id) {
- tst_resm(TFAIL,
- "child reported a pid of %d. parent received %ld from fork()",
- child_id, TEST_RETURN);
- } else {
- tst_resm(TPASS,
- "child pid and fork() return agree: %d",
- child_id);
- }
- }
- close(fildes);
- }
-}
-
-int main(int ac, char **av)
-{
- int lc;
- int fails;
- int kid_status, wait_status;
-
- tst_parse_opts(ac, av, NULL, NULL);
-
- setup();
-
- for (lc = 0; TEST_LOOPING(lc); lc++) {
- tst_count = 0;
- fails = 0;
-
- TEST(fork());
- if (TEST_RETURN == -1) {
- tst_resm(TFAIL, "fork() Failed, errno=%d : %s",
- TEST_ERRNO, strerror(TEST_ERRNO));
- tst_resm(TBROK, "unable to continue");
- }
- if (TEST_RETURN == 0) {
- /* child */
- child_pid();
- exit(KIDEXIT);
- } else {
- /* parent */
- tst_resm(TPASS, "fork() returned %ld",
- TEST_RETURN);
- /* wait for the child to complete */
- wait_status = waitpid(TEST_RETURN, &kid_status, 0);
-
- if (wait_status == TEST_RETURN) {
- if (kid_status != KIDEXIT << 8) {
- tst_resm(TBROK,
- "incorrect child status returned on wait(): %d",
- kid_status);
- fails++;
- }
- } else {
- tst_resm(TBROK,
- "wait() for child status failed with %d errno: %d : %s",
- wait_status, errno,
- strerror(errno));
- fails++;
- }
- if (fails == 0) {
- /* verification tests */
- parent_pid();
- }
- } /* TEST_RETURN */
+ tst_res(TPASS, "child pid and fork() return agree: %d", pid);
}
- cleanup();
- tst_exit();
+ SAFE_CLOSE(fd);
}
-static void setup(void)
+static void verify_fork(void)
{
+ int kid_status, term_pid, pid;
- tst_sig(FORK, DEF_HANDLER, cleanup);
-
- TEST_PAUSE;
-
- tst_tmpdir();
-}
+ pid = SAFE_FORK();
+ if (!pid) {
+ do_child();
+ exit(KIDEXIT);
+ }
-static void cleanup(void)
-{
+ term_pid = SAFE_WAITPID(pid, &kid_status, 0);
+ if (term_pid == pid) {
+ if (kid_status != KIDEXIT << 8)
+ tst_res(TFAIL, "incorrect child status returned %d", kid_status);
+ else
+ tst_res(TPASS, "correct child status returned %d", kid_status);
- tst_rmdir();
+ check_child_pid(pid);
+ } else {
+ tst_res(TFAIL, "waitpid() returns %d instead of expected pid %d", term_pid, pid);
+ }
+ tst_reap_children();
}
+
+static struct tst_test test = {
+ .needs_tmpdir = 1,
+ .needs_root = 1,
+ .forks_child = 1,
+ .test_all = verify_fork,
+};
--
2.27.0
More information about the ltp
mailing list