#include <errno.h> /* errno */
#include <stdio.h> /* fprintf(3), stderr, "psops.c" */
#include <string.h> /* strerror(3) */
#include <sysexits.h> /* EX_OSERR, "psops.c" */
#include <unistd.h> /* execvp(3) */
#include <sys/types.h> /* <sys/wait.h> */
#include <sys/wait.h> /* wait(2) */

#include "libpsargs.h" /* corresponding_arg(3), "psops.c" */

static char *program_name = "pscat";

int
f(char **argv){
	int child;
	char **corr;

	*(corr = corresponding_arg(argv)) = NULL;
	switch(fork()){
	case -1:
		fprintf(stderr, "%s: %s\n", program_name, strerror(errno));
		return EX_OSERR;
	case 0: execvp(argv[1], argv+1);
	default:
		wait(&child);
		argv = corr;
		return *++argv == NULL
			? WIFEXITED(child) * WEXITSTATUS(child)
			: f(argv);
	}
}

#include "psops.c"