xref: /third_party/ltp/testcases/kernel/syscalls/rename/rename14.c

/*
 *
 *   Copyright (c) International Business Machines  Corp., 2002
 *
 *   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
 */

/* 11/12/2002   Port to LTP     robbiew@us.ibm.com */
/* 06/30/2001	Port to Linux	nsharoff@us.ibm.com */

/*
 * NAME
 *	rename14.c - create and rename files
 *
 * CALLS
 *	create, unlink, rename
 *
 * ALGORITHM
 *	Creates two processes.  One creates and unlinks a file.
 *	The other renames that file.
 *
 */

#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "test.h"

#define FAILED 0
#define PASSED 1

int local_flag = PASSED;

char *TCID = "rename14";
int TST_TOTAL = 1;

#define RUNTIME	5

int kidpid[2];
int parent_pid;

int term(void);
int al(void);
void dochild1(void);
void dochild2(void);

int main(int argc, char *argv[])
{
	int pid;
	sigset_t set;
	struct sigaction act, oact;

	tst_parse_opts(argc, argv, NULL, NULL);

	sigemptyset(&set);
	act.sa_handler = (void (*)())term;
	act.sa_mask = set;
	act.sa_flags = 0;
	if (sigaction(SIGTERM, &act, &oact)) {
		tst_brkm(TBROK, NULL, "Sigaction(SIGTERM)");
	}

	sigemptyset(&set);
	act.sa_handler = (void (*)())al;
	act.sa_mask = set;
	act.sa_flags = 0;
	if (sigaction(SIGALRM, &act, 0)) {
		tst_brkm(TBROK, NULL, "Sigaction(SIGALRM)");
	}
	parent_pid = getpid();
	tst_tmpdir();

	pid = FORK_OR_VFORK();
	if (pid < 0)
		tst_brkm(TBROK, NULL, "fork() returned %d", pid);
	if (pid == 0)
		dochild1();

	kidpid[0] = pid;
	pid = FORK_OR_VFORK();
	if (pid < 0) {
		(void)kill(kidpid[0], SIGTERM);
		(void)unlink("./rename14");
		tst_brkm(TBROK, NULL, "fork() returned %d", pid);
	}
	if (pid == 0)
		dochild2();

	kidpid[1] = pid;

	alarm(RUNTIME);

	/* Collect child processes. */
	/* Wait for timeout */
	pause();

	kill(kidpid[0], SIGTERM);
	kill(kidpid[1], SIGTERM);

	waitpid(kidpid[0], NULL, 0);
	waitpid(kidpid[1], NULL, 0);

	unlink("./rename14");
	unlink("./rename14xyz");
	(local_flag == PASSED) ? tst_resm(TPASS, "Test Passed")
	    : tst_resm(TFAIL, "Test Failed");

	tst_rmdir();
	tst_exit();
}

int term(void)
{
	if (parent_pid != getpid())
		exit(0);
	if (kidpid[0])
		return (kill(kidpid[0], SIGTERM));
	if (kidpid[1])
		return (kill(kidpid[1], SIGTERM));
	return 0;
}

int al(void)
{
	if (kidpid[0])
		return (kill(kidpid[0], SIGTERM));
	if (kidpid[1])
		return (kill(kidpid[1], SIGTERM));
	return 0;
}

void dochild1(void)
{
	int fd;

	for (;;) {
		fd = creat("./rename14", 0666);
		unlink("./rename14");
		close(fd);
	}
}

void dochild2(void)
{
	for (;;)
		rename("./rename14", "./rename14xyz");
}