Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1 | /* |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 2 | * Mini grep implementation for busybox using libc regex. |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 3 | * |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 4 | * Copyright (C) 1999,2000 by Lineo, inc. |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 5 | * Written by Mark Whitley <markw@lineo.com>, <markw@enol.com> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 6 | * |
Eric Andersen | 3e0fbae | 1999-10-19 06:02:44 +0000 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 21 | */ |
| 22 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 23 | #include <stdio.h> |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 24 | #include <stdlib.h> |
Eric Andersen | e9b527a | 2000-07-09 05:56:14 +0000 | [diff] [blame] | 25 | #include <getopt.h> |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 26 | #include <regex.h> |
| 27 | #include <string.h> /* for strerror() */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 28 | #include <errno.h> |
Eric Andersen | 3570a34 | 2000-09-25 21:45:58 +0000 | [diff] [blame] | 29 | #include "busybox.h" |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 30 | |
| 31 | extern int optind; /* in unistd.h */ |
| 32 | extern int errno; /* for use with strerror() */ |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 33 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 34 | /* options */ |
| 35 | static int ignore_case = 0; |
| 36 | static int print_filename = 0; |
| 37 | static int print_line_num = 0; |
Mark Whitley | 8f12243 | 2000-07-18 18:37:01 +0000 | [diff] [blame] | 38 | static int print_count_only = 0; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 39 | static int be_quiet = 0; |
| 40 | static int invert_search = 0; |
| 41 | static int suppress_err_msgs = 0; |
| 42 | |
| 43 | /* globals */ |
| 44 | static regex_t regex; /* storage space for compiled regular expression */ |
Matt Kraai | deb95f6 | 2000-08-06 15:25:53 +0000 | [diff] [blame] | 45 | static int matched; /* keeps track of whether we ever matched */ |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 46 | static char *cur_file = NULL; /* the current file we are reading */ |
| 47 | |
| 48 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 49 | static void print_matched_line(char *line, int linenum) |
| 50 | { |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 51 | if (print_count_only) |
| 52 | return; |
| 53 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 54 | if (print_filename) |
| 55 | printf("%s:", cur_file); |
| 56 | if (print_line_num) |
| 57 | printf("%i:", linenum); |
| 58 | |
Matt Kraai | 567cdd1 | 2000-10-13 18:55:06 +0000 | [diff] [blame] | 59 | puts(line); |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | static void grep_file(FILE *file) |
| 63 | { |
| 64 | char *line = NULL; |
| 65 | int ret; |
| 66 | int linenum = 0; |
Matt Kraai | deb95f6 | 2000-08-06 15:25:53 +0000 | [diff] [blame] | 67 | int nmatches = 0; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 68 | |
| 69 | while ((line = get_line_from_file(file)) != NULL) { |
Matt Kraai | 567cdd1 | 2000-10-13 18:55:06 +0000 | [diff] [blame] | 70 | if (line[strlen(line)-1] == '\n') |
| 71 | line[strlen(line)-1] = '\0'; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 72 | linenum++; |
| 73 | ret = regexec(®ex, line, 0, NULL, 0); |
| 74 | if (ret == 0 && !invert_search) { /* match */ |
| 75 | |
| 76 | /* if we found a match but were told to be quiet, stop here and |
| 77 | * return success */ |
| 78 | if (be_quiet) { |
| 79 | regfree(®ex); |
| 80 | exit(0); |
| 81 | } |
| 82 | |
| 83 | nmatches++; |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 84 | print_matched_line(line, linenum); |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 85 | |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 86 | } |
| 87 | else if (ret == REG_NOMATCH && invert_search) { |
Mark Whitley | 8f12243 | 2000-07-18 18:37:01 +0000 | [diff] [blame] | 88 | nmatches++; |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 89 | print_matched_line(line, linenum); |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | free(line); |
| 93 | } |
Mark Whitley | 8f12243 | 2000-07-18 18:37:01 +0000 | [diff] [blame] | 94 | |
| 95 | /* special-case post processing */ |
| 96 | if (print_count_only) { |
| 97 | if (print_filename) |
| 98 | printf("%s:", cur_file); |
| 99 | printf("%i\n", nmatches); |
| 100 | } |
| 101 | |
Matt Kraai | deb95f6 | 2000-08-06 15:25:53 +0000 | [diff] [blame] | 102 | /* record if we matched */ |
| 103 | if (nmatches != 0) |
| 104 | matched = 1; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 105 | } |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 106 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 107 | extern int grep_main(int argc, char **argv) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 108 | { |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 109 | int opt; |
| 110 | int reflags; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 111 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 112 | /* do normal option parsing */ |
Mark Whitley | 8f12243 | 2000-07-18 18:37:01 +0000 | [diff] [blame] | 113 | while ((opt = getopt(argc, argv, "iHhnqvsc")) > 0) { |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 114 | switch (opt) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 115 | case 'i': |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 116 | ignore_case++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 117 | break; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 118 | case 'H': |
| 119 | print_filename++; |
| 120 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 121 | case 'h': |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 122 | print_filename--; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 123 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 124 | case 'n': |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 125 | print_line_num++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 126 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 127 | case 'q': |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 128 | be_quiet++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 129 | break; |
John Beppu | f93a95d | 2000-04-24 18:07:30 +0000 | [diff] [blame] | 130 | case 'v': |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 131 | invert_search++; |
John Beppu | f93a95d | 2000-04-24 18:07:30 +0000 | [diff] [blame] | 132 | break; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 133 | case 's': |
| 134 | suppress_err_msgs++; |
| 135 | break; |
Mark Whitley | 8f12243 | 2000-07-18 18:37:01 +0000 | [diff] [blame] | 136 | case 'c': |
| 137 | print_count_only++; |
| 138 | break; |
Eric Andersen | 053b146 | 2000-06-13 06:24:53 +0000 | [diff] [blame] | 139 | } |
Eric Andersen | 053b146 | 2000-06-13 06:24:53 +0000 | [diff] [blame] | 140 | } |
| 141 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 142 | /* argv[optind] should be the regex pattern; no pattern, no worky */ |
| 143 | if (argv[optind] == NULL) |
| 144 | usage(grep_usage); |
| 145 | |
Mark Whitley | 44735f8 | 2000-07-10 15:50:26 +0000 | [diff] [blame] | 146 | /* compile the regular expression |
| 147 | * we're not going to mess with sub-expressions, and we need to |
| 148 | * treat newlines right. */ |
Matt Kraai | 567cdd1 | 2000-10-13 18:55:06 +0000 | [diff] [blame] | 149 | reflags = REG_NOSUB; |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 150 | if (ignore_case) |
| 151 | reflags |= REG_ICASE; |
Mark Whitley | c41e8c8 | 2000-07-12 23:35:21 +0000 | [diff] [blame] | 152 | xregcomp(®ex, argv[optind], reflags); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 153 | |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 154 | /* argv[(optind+1)..(argc-1)] should be names of file to grep through. If |
| 155 | * there is more than one file to grep, we will print the filenames */ |
| 156 | if ((argc-1) - (optind+1) > 0) |
| 157 | print_filename++; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 158 | |
Mark Whitley | 2e1148b | 2000-06-28 22:59:30 +0000 | [diff] [blame] | 159 | /* If no files were specified, or '-' was specified, take input from |
| 160 | * stdin. Otherwise, we grep through all the files specified. */ |
Mark Whitley | 8bd891c | 2000-06-28 22:55:59 +0000 | [diff] [blame] | 161 | if (argv[optind+1] == NULL || (strcmp(argv[optind+1], "-") == 0)) { |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 162 | grep_file(stdin); |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 163 | } |
| 164 | else { |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 165 | int i; |
| 166 | FILE *file; |
| 167 | for (i = optind + 1; i < argc; i++) { |
| 168 | cur_file = argv[i]; |
| 169 | file = fopen(cur_file, "r"); |
| 170 | if (file == NULL) { |
| 171 | if (!suppress_err_msgs) |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 172 | perror_msg("%s", cur_file); |
Mark Whitley | 2ef880b | 2000-07-18 21:02:06 +0000 | [diff] [blame] | 173 | } |
| 174 | else { |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 175 | grep_file(file); |
| 176 | fclose(file); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 177 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 178 | } |
| 179 | } |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 180 | |
| 181 | regfree(®ex); |
| 182 | |
Matt Kraai | deb95f6 | 2000-08-06 15:25:53 +0000 | [diff] [blame] | 183 | if (!matched) |
Mark Whitley | d372189 | 2000-06-28 22:00:26 +0000 | [diff] [blame] | 184 | return 1; |
| 185 | |
| 186 | return 0; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 187 | } |