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/*
* Copyright 2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <assert.h>
#include <err.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "magic_syscalls.h"
int
main(int argc, char *argv[])
{
static char msg[] = "in_child_created_using_vfork";
if (strcmp(argv[0], msg) == 0) {
puts(msg);
return EXIT_SUCCESS;
}
if (argc < 2)
return EXIT_FAILURE;
char *log_path = argv[1];
magic_syscall_start_log(log_path, "1");
pid_t r = vfork();
if (r < 0)
err(EXIT_FAILURE, "vfork");
if (r == 0) {
/* In vfork child process */
_exit(EXIT_SUCCESS);
}
const char *line =
"In original process, after first vfork\n";
assert(write(1, line, strlen(line)) == (ssize_t)strlen(line));
r = vfork();
if (r < 0)
err(EXIT_FAILURE, "vfork");
if (r == 0) {
/* In vfork child process again */
execve(argv[0], (char *[]) {msg, NULL}, (char *[]) {NULL});
err(EXIT_FAILURE, "execve returned");
}
line = "In original process, after second vfork\n";
assert(write(1, line, strlen(line)) == (ssize_t)strlen(line));
magic_syscall_stop_log();
return EXIT_SUCCESS;
}