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/*
* Check status=successful filtering when a non-leader thread invokes execve.
*
* Copyright (c) 2019 Paul Chaignon <paul.chaignon@gmail.com>
* Copyright (c) 2022 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/uio.h>
static pid_t leader;
static void *
thread_exec(void *arg)
{
pid_t tid = syscall(__NR_gettid);
printf("%-5d +++ superseded by execve in pid %u +++\n",
leader, tid);
char *argv[] = {((char **) arg)[0], (char *) "0", NULL};
execve(argv[0], argv, NULL);
perror_msg_and_fail("execve");
}
int
main(int ac, char **av)
{
if (ac > 1)
return 0;
int fds[2];
if (pipe(fds))
perror_msg_and_fail("pipe");
pid_t child = fork();
if (child < 0)
perror_msg_and_fail("fork");
leader = getpid();
setvbuf(stdout, NULL, _IONBF, 0);
if (!child) {
close(fds[0]);
pthread_t thre;
errno = pthread_create(&thre, NULL, thread_exec, av);
if (errno)
perror_msg_and_fail("pthread_create");
for (;;) { /* wait for execve */ }
return 1;
}
close(fds[1]);
unsigned int len = sizeof(fds[1]);
struct iovec rio = { .iov_base = &fds[1], .iov_len = len };
if (readv(fds[0], &rio, 1))
perror_msg_and_fail("readv");
printf("%-5d readv(%d, [{iov_base=\"\", iov_len=%u}], 1) = 0\n"
"%-5d +++ exited with 0 +++\n",
leader, fds[0], len, leader);
return 0;
}
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