#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

char *cmdline_fname = "/proc/self/cmdline";

#define BUFSIZE 32

int main(void) {
        int cmdline_fd;
        char cmdline[BUFSIZE];
        int bytes;

        cmdline_fd = open(cmdline_fname, O_RDONLY);
        if (cmdline_fd != -1) {
                bytes = read(cmdline_fd, cmdline, BUFSIZE);
                if (bytes != -1) {
                        write(STDOUT_FILENO, cmdline, bytes);
                }
                close(cmdline_fd);
        }
        return 0;
}