| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini cmp implementation for busybox |
| * |
| * |
| * Copyright (C) 2000 by Lineo, inc. |
| * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include "busybox.h" |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| int cmp_main(int argc, char **argv) |
| { |
| FILE *fp1 = NULL, *fp2 = stdin; |
| char *filename1 = argv[1], *filename2 = "-"; |
| int c1, c2, char_pos = 1, line_pos = 1; |
| |
| /* parse argv[] */ |
| if (argc < 2 || 3 < argc) |
| usage(cmp_usage); |
| |
| fp1 = xfopen(argv[1], "r"); |
| if (argv[2] != NULL) { |
| fp2 = xfopen(argv[2], "r"); |
| filename2 = argv[2]; |
| } |
| |
| do { |
| c1 = fgetc(fp1); |
| c2 = fgetc(fp2); |
| if (c1 != c2) { |
| if (c1 == EOF) |
| printf("EOF on %s\n", filename1); |
| else if (c2 == EOF) |
| printf("EOF on %s\n", filename2); |
| else |
| printf("%s %s differ: char %d, line %d\n", filename1, filename2, |
| char_pos, line_pos); |
| return 1; |
| } |
| char_pos++; |
| if (c1 == '\n') |
| line_pos++; |
| } while (c1 != EOF); |
| |
| return EXIT_SUCCESS; |
| } |