#include "../lib/exec/exec.h"
#include "../lib/sys/fork.h"
#include "../lib/sys/wait4.h"
#include "../lib/io/io.h"
#include "../lib/sys/types.h"
#include "../lib/cstr/cstr.h"

char line[BUFSIZ];


void replace_args(char **argv, char *rep)
{
	for (; *argv; ++argv) {
		if (cstr_compare(*argv, "%") == 0) {
			*argv = rep;
		}
	}
}


int main(int argc, char **argv)
{
	if (argc <= 1) {
		wff(STDERR_FD, "for command [args...] % [args...]")
		return -1;
	}

	i64 size;
	int pid;
	
	while ((size = get_next_line_from_fd(STDIN_FD, line)) >= 0) {

		pid = fork();
		if (pid == 0) {
			replace_args(argv + 1, line);
			exec((const char**)(argv + 1));
			wff(STDERR_FD, "command not found: %s", argv[1]);
			return -1;
		} 

		wait4(pid, 0, 0, 0);
	}

	return 0;
}