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/*
* libpulp - User-space Livepatching Library
*
* Copyright (C) 2020-2021 SUSE Software Solutions GmbH
*
* This file is part of libpulp.
*
* libpulp is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libpulp 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with libpulp. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
int
main(int argc, char **argv, char **envp)
{
int pid;
int status;
if (argc < 2) {
printf("Usage: %s <subprogram>.\n", argv[0]);
return 1;
}
/* Signal readiness. */
printf("Parent ready\n");
fflush(stdout);
/* Mimic a terminal by forking a new process and waiting for it. */
if ((pid = fork())) {
if (waitpid(pid, &status, WUNTRACED | WCONTINUED) == -1)
perror("terminal");
if (WIFSTOPPED(status))
printf("Child stopped with %d.\n", WSTOPSIG(status));
if (WIFCONTINUED(status))
printf("Child continued.\n");
return 7;
}
else
execve(argv[1], argv, envp);
return 0;
}
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