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/* SPDX-License-Identifier: GPL-2.0 */
/** \file exec.c Helper functions for spawning new processes. */
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include "gcc-compat.h"
#include "log.h"
#include "err.h"
#include "str.h"
#include "exec.h"
/**
* Spawn a new process using execvp().
*
* \param pid Will hold the pid of the created process upon return.
* \param file Path of the executable to execute.
* \param args The argument array for the command.
*
* \return Standard.
*
* \sa fork(2), exec(3).
*/
void dss_exec(pid_t *pid, const char *file, char *const *const args)
{
if ((*pid = fork()) < 0) {
DSS_EMERG_LOG(("fork error: %s\n", strerror(errno)));
exit(EXIT_FAILURE);
}
if (*pid) /* parent */
return;
signal(SIGINT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
execvp(file, args);
DSS_EMERG_LOG(("execvp error: %s\n", strerror(errno)));
_exit(EXIT_FAILURE);
}
/**
* Exec the command given as a command line.
*
* \param pid Will hold the pid of the created process upon return.
* \param cmdline Holds the command and its arguments, separated by spaces.
*
* This function uses fork/exec to create a new process.
*
* \return Standard.
*/
void dss_exec_cmdline_pid(pid_t *pid, const char *cmdline)
{
char **argv, *tmp = dss_strdup(cmdline);
split_args(tmp, &argv);
dss_exec(pid, argv[0], argv);
free(argv);
free(tmp);
}
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