1 /* vi: set sw=4 ts=4: */
3 * Mini grep implementation for busybox
6 * Copyright (C) 1999,2000 by Lineo, inc.
7 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 18-Dec-1999 Konstantin Boldyshev <konst@voshod.com>
28 + -q option (be quiet)
29 + exit code depending on grep result (TRUE or FALSE)
42 #define BB_DECLARE_EXTERN
43 #define bb_need_too_few_args
46 static const char grep_usage[] =
47 "grep [OPTIONS]... PATTERN [FILE]...\n"
48 #ifndef BB_FEATURE_TRIVIAL_HELP
49 "\nSearch for PATTERN in each FILE or standard input.\n\n"
51 "\t-h\tsuppress the prefixing filename on output\n"
52 "\t-i\tignore case distinctions\n"
53 "\t-n\tprint line number with output lines\n"
54 "\t-q\tbe quiet. Returns 0 if result was found, 1 otherwise\n"
55 "\t-v\tselect non-matching lines\n\n"
57 "This version of grep matches full regular expresions.\n";
59 "This version of grep matches strings (not regular expresions).\n"
64 static int match = FALSE, beQuiet = FALSE;
66 static void do_grep(FILE * fp, char *needle, char *fileName, int tellName,
67 int ignoreCase, int tellLine, int invertSearch)
71 int truth = !invertSearch;
73 while ((haystack = cstring_lineFromFile(fp))) {
75 if (find_match(haystack, needle, ignoreCase) == truth) {
77 printf("%s:", fileName);
83 fputs(haystack, stdout);
92 extern int grep_main(int argc, char **argv)
98 int ignoreCase = FALSE;
100 int invertSearch = FALSE;
107 while (--argc >= 0 && *argv && (**argv == '-')) {
137 if (argc == 0 || *argv == NULL) {
138 fatalError(too_few_args, "grep");
145 do_grep(stdin, needle, "stdin", FALSE, ignoreCase, tellLine, invertSearch);
147 /* Never print the filename for just one file */
153 fp = fopen(fileName, "r");
159 do_grep(fp, needle, fileName, tellName, ignoreCase, tellLine, invertSearch);