/* SPDX-License-Identifier: GPL-2.0 */

#include <sys/wait.h>

#include <stdio.h>

#include <errno.h>

#include <unistd.h>

#include "utils.h"

#include "namespace.h"

int cmd_exec(const char *cmd, char **argv, bool do_fork,

	     int (*setup)(void *), void *arg)

{

	fflush(stdout);

	if (do_fork) {

		int status;

		pid_t pid;

		pid = fork();

		if (pid < 0) {

			perror("fork");

			exit(1);

		}

		if (pid != 0) {

			/* Parent  */

			if (waitpid(pid, &status, 0) < 0) {

				perror("waitpid");

				exit(1);

			}

			if (WIFEXITED(status)) {

				return WEXITSTATUS(status);

			}

			exit(1);

		}

	}

	if (setup && setup(arg))

		return -1;

	if (execvp(cmd, argv)  < 0)

		fprintf(stderr, "exec of \"%s\" failed: %s\n",

				cmd, strerror(errno));

	_exit(1);

}