     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/main.c	Wed Apr 01 22:11:05 2009 +0100
     1.3 @@ -0,0 +1,47 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include "hexdump.h"
     1.7 +
     1.8 +#define ESC 0x1b
     1.9 +
    1.10 +int main(int argc, char **argv)
    1.11 +{
    1.12 +	FILE *prn;
    1.13 +
    1.14 +	// check command line args
    1.15 +	if (argc < 2) {
    1.16 +		printf("ERROR: must specify device name\n");
    1.17 +		return -1;
    1.18 +	}
    1.19 +
    1.20 +	// open printer device
    1.21 +	if ((prn = fopen(argv[1], "r+b")) == NULL) {
    1.22 +		printf("ERROR: couldn't open printer device '%s'\n", argv[1]);
    1.23 +		return -1;
    1.24 +	}
    1.25 +
    1.26 +	// INITIALISE
    1.27 +	fprintf(prn, "%c%c", ESC, '@');
    1.28 +
    1.29 +	// REQUEST STATUS
    1.30 +	fprintf(prn, "%c%c%c", ESC, 'i', 'S');
    1.31 +
    1.32 +	// Read status buffer from printer
    1.33 +	unsigned char buf[32];
    1.34 +	int timeout = 128;
    1.35 +	do {
    1.36 +		fread(buf, 1, 32, prn);
    1.37 +	} while ((buf[0] != 0x80) && (timeout-- > 0));
    1.38 +
    1.39 +	if (timeout > 0) {
    1.40 +		printf("Printer status:\n");
    1.41 +		hex_dump(buf, 32);
    1.42 +	} else {
    1.43 +		printf("TIMEOUT\n");
    1.44 +		return -1;
    1.45 +	}
    1.46 +
    1.47 +	// Close the printer stream
    1.48 +	fclose(prn);
    1.49 +	return 0;
    1.50 +}