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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static void
usage(void)
{
enprintf(2, "usage: %s [-l | -s] file1 file2\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp[2];
size_t line = 1, n;
int ret = 0, lflag = 0, sflag = 0, same = 1, b[2];
ARGBEGIN {
case 'l':
lflag = 1;
break;
case 's':
sflag = 1;
break;
default:
usage();
} ARGEND
if (argc != 2 || (lflag && sflag))
usage();
for (n = 0; n < 2; n++) {
if (!strcmp(argv[n], "-")) {
argv[n] = "<stdin>";
fp[n] = stdin;
} else {
if (!(fp[n] = fopen(argv[n], "r"))) {
if (!sflag)
weprintf("fopen %s:", argv[n]);
return 2;
}
}
}
for (n = 1; ; n++) {
b[0] = getc(fp[0]);
b[1] = getc(fp[1]);
if (b[0] == b[1]) {
if (b[0] == EOF)
break;
else if (b[0] == '\n')
line++;
continue;
} else if (b[0] == EOF || b[1] == EOF) {
if (!sflag)
weprintf("cmp: EOF on %s\n", argv[(b[0] != EOF)]);
same = 0;
break;
} else if (!lflag) {
if (!sflag)
printf("%s %s differ: byte %zu, line %zu\n",
argv[0], argv[1], n, line);
same = 0;
break;
} else {
printf("%zu %o %o\n", n, b[0], b[1]);
same = 0;
}
}
if (!ret)
ret = !same;
if (fshut(fp[0], argv[0]) | (fp[0] != fp[1] && fshut(fp[1], argv[1])) |
fshut(stdout, "<stdout>"))
ret = 2;
return ret;
}