xv6/echo.c

#include "types.h"
#include "stat.h"
#include "user.h"

int main(int argc, char *argv[]) {
    int i;

    for (i = 1; i < argc; i++) {
        printf(1, "%s%s", argv[i], i + 1 < argc ? " " : "\n");
    }
    exit();
}