---

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
    if (argc != 3)
        return 1;

    int in = open(argv[1], O_RDONLY);
    if (in == -1)
        return 1;

    if (access(argv[2], F_OK) == 0) {
        char answer;
        printf("Replace? (y/n): ");
        fflush(stdout);
        read(0, &answer, 1);

        if (answer != 'y') {
            close(in);
            return 0;
        }
    }

    int out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0666);
    if (out == -1) {
        close(in);
        return 1;
    }

    int16_t x;
    int i = 1;
    char oct[12], hex[12], line[64];

    while (read(in, &x, sizeof(x)) == sizeof(x)) {
        unsigned int a;

        if (x < 0)
            a = -(int)x;
        else
            a = x;

        if (x < 0) {
            snprintf(oct, sizeof(oct), "-0%o", a);
            snprintf(hex, sizeof(hex), "-0x%x", a);
        } else {
            snprintf(oct, sizeof(oct), "0%o", a);
            snprintf(hex, sizeof(hex), "0x%x", a);
        }

        snprintf(line, sizeof(line),
                 "%10d|%10d|%10s|%10s\n",
                 i, x, oct, hex);

        write(out, line, strlen(line));
        i++;
    }

    close(in);
    close(out);
    return 0;
}