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/*
* This file is part of attach-p-cmd strace test.
*
* Copyright (c) 2016-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include "attach-p-cmd.h"
static void
wait_for_peer_invocation(void)
{
/* create the lock directory */
if (mkdir(lockdir, 0700))
perror_msg_and_fail("mkdir: %s", lockdir);
/* wait for the lock directory to be removed by peer */
while (mkdir(lockdir, 0700)) {
if (EEXIST != errno)
perror_msg_and_fail("mkdir: %s", lockdir);
}
/* cleanup the lock directory */
if (rmdir(lockdir))
perror_msg_and_fail("rmdir: %s", lockdir);
}
static void
wait_for_peer_termination(void)
{
FILE *fp = fopen(pidfile, "r");
if (!fp)
perror_msg_and_fail("fopen: %s", pidfile);
pid_t pid;
if (fscanf(fp, "%d", &pid) < 0)
perror_msg_and_fail("fscanf: %s", pidfile);
if (pid < 0)
error_msg_and_fail("pid = %d", pid);
if (fclose(fp))
perror_msg_and_fail("fclose: %s", pidfile);
if (unlink(pidfile))
perror_msg_and_fail("unlink: %s", pidfile);
while (kill(pid, 0) == 0)
;
}
int
main(void)
{
wait_for_peer_invocation();
wait_for_peer_termination();
static const struct timespec ts = { .tv_nsec = 123456789 };
if (nanosleep(&ts, NULL))
perror_msg_and_fail("nanosleep");
static const char dir[] = "attach-p-cmd.test -p";
pid_t pid = getpid();
int rc = chdir(dir);
printf("%-5d chdir(\"%s\") = %s\n"
"%-5d +++ exited with 0 +++\n",
pid, dir, sprintrc(rc), pid);
return 0;
}
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