tabby/bin/capture.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdarg.h>
#include <unistd.h>
#include <errno.h>

#include <tabby/link.h>
#include <tabby/printer.h>

static void usage(int argc, char **argv, char *message, ...) {
    if (message) {
        va_list args;

        va_start(args, message);
        vfprintf(stderr, message, args);
         fprintf(stderr, "\n");
        va_end(args);
    }

    fprintf(stderr, "usage: %s capture device\n", argv[0]);

    exit(1);
}

int tabby_command_capture(int argc, char **argv) {
    tabby_printer *printer;
    tabby_printer_packet header;

    uint8_t body[TABBY_PRINTER_PACKET_MAX_SIZE];

    if (argc != 3) {
        usage(argc, argv, "No device specified");
    }

    if ((printer = tabby_printer_open(argv[2])) == NULL) {
        fprintf(stderr, "%s: %s: %s: %s\n", argv[0], "tabby_printer_open()",
            argv[2], strerror(errno));

        goto error_printer_open;
    }

    while (1) {
        if (tabby_printer_packet_recv(printer, &header, &body) < 0) {
            fprintf(stderr, "%s: %s: %s\n",
                argv[0], "tabby_printer_packet_recv()", strerror(errno));

            continue;
        }

        if (header.type == 0x04) {
            write(1, &body, header.size);
        }
    }

    tabby_printer_close(printer);

    return 0;

error_printer_open:
    return 1;
}