#include "process.h"
#include "err.h"
#include "log.h"
#include <errno.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>

int
spawn(char **argv)
{
	pid_t pid;
	int status;

	if (!argv[0] || *argv[0] == '\0') {
		return SF_ERR_INVALID_ARG;
	}

	if ((pid = fork()) < 0) {
		log_write(LOG_ERR, "fork error: %s", strerror(errno));
		return -errno;
	}

	if (pid == 0) {
		execvp(argv[0], argv);

		_exit(errno == ENONET ? 127 : 126);
	}

	if (waitpid(pid, &status, 0) < 0) {
		return -errno;
	}

	if (WIFEXITED(status)) {
		int exit_code = WEXITSTATUS(status);
		if (exit_code != 0) {
			log_write(LOG_ERR, "Command failed with code %d",
				  exit_code);
			return SF_ERR_EXEC_FAILED;
		}
	} else if (WIFSIGNALED(status)) {
		return SF_ERR_SIGNALED;
	}

	return SF_OK;
}