61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int
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main(int argc, char *argv[])
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{
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bool lflag = false;
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bool sflag = false;
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bool same = true;
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char c;
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int b[2], i;
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long line = 1, n = 1;
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FILE *fp[2];
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if((c = getopt(argc, argv, "ls")) != -1)
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switch(c) {
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case 'l':
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lflag = true;
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break;
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case 's':
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sflag = true;
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break;
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default:
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exit(2);
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}
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if(optind != argc-2) {
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fprintf(stderr, "usage: %s [-ls] file1 file2\n", argv[0]);
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exit(2);
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}
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for(i = 0; i < 2; i++)
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if(!(fp[i] = fopen(argv[optind+i], "r"))) {
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fprintf(stderr, "fopen %s:", argv[optind+i]);
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exit(2);
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}
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for(n = 1; ((b[0] = getc(fp[0])) != EOF) | ((b[1] = getc(fp[1])) != EOF); n++) {
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if(b[0] == '\n')
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line++;
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if(b[0] == b[1])
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continue;
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for(i = 0; i < 2; i++)
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if(b[i] == EOF) {
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fprintf(stderr, "cmp: EOF on %s\n", argv[optind+i]);
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return 1;
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}
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if(!lflag) {
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if(!sflag)
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printf("%s %s differ: char %ld, line %ld\n",
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argv[optind], argv[optind+1], n, line);
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return 1;
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}
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else {
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printf("%4ld %3o %3o\n", n, b[0], b[1]);
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same = false;
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}
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}
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return same ? 0 : 1;
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}
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