+/* vi: set sw=4 ts=4: */
/*
* Mini grep implementation for busybox
*
- * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
+ *
+ * Copyright (C) 1999,2000 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* 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
*
*/
+/*
+ 18-Dec-1999 Konstantin Boldyshev <konst@voshod.com>
+
+ + -q option (be quiet)
+ + exit code depending on grep result (TRUE or FALSE)
+ (useful for scripts)
+*/
+
#include "internal.h"
+#include "regexp.h"
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
#include <signal.h>
#include <time.h>
#include <ctype.h>
+#define BB_DECLARE_EXTERN
+#define bb_need_too_few_args
+#include "messages.c"
+
+static const char grep_usage[] =
+ "grep [OPTIONS]... PATTERN [FILE]...\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nSearch for PATTERN in each FILE or standard input.\n\n"
+ "OPTIONS:\n"
+ "\t-h\tsuppress the prefixing filename on output\n"
+ "\t-i\tignore case distinctions\n"
+ "\t-n\tprint line number with output lines\n"
+ "\t-q\tbe quiet. Returns 0 if result was found, 1 otherwise\n"
+ "\t-v\tselect non-matching lines\n\n"
+#if defined BB_REGEXP
+ "This version of grep matches full regular expressions.\n";
+#else
+ "This version of grep matches strings (not regular expressions).\n"
+#endif
+#endif
+ ;
+
+static int match = FALSE, beQuiet = FALSE;
+
+static void do_grep(FILE * fp, char *needle, char *fileName, int tellName,
+ int ignoreCase, int tellLine, int invertSearch)
+{
+ long line = 0;
+ char *haystack;
+ int truth = !invertSearch;
+ while ((haystack = cstring_lineFromFile(fp))) {
+ line++;
+ if (find_match(haystack, needle, ignoreCase) == truth) {
+ if (tellName == TRUE)
+ printf("%s:", fileName);
-const char grep_usage[] =
-"grep [-ihn]... PATTERN [FILE]...\n"
-"Search for PATTERN in each FILE or standard input.\n\n"
-"\t-h\tsuppress the prefixing filename on output\n"
-"\t-i\tignore case distinctions\n"
-"\t-n\tprint line number with output lines\n\n"
-"This version of grep matches strings (not full regexps).\n";
-
+ if (tellLine == TRUE)
+ printf("%ld:", line);
-/*
- * See if the specified needle is found in the specified haystack.
- */
-static int search (const char *haystack, const char *needle, int ignoreCase)
-{
+ if (beQuiet == FALSE)
+ fputs(haystack, stdout);
- if (ignoreCase == FALSE) {
- haystack = strstr (haystack, needle);
- if (haystack == NULL)
- return FALSE;
- return TRUE;
- } else {
- int i;
- char needle1[BUF_SIZE];
- char haystack1[BUF_SIZE];
-
- strncpy( haystack1, haystack, sizeof(haystack1));
- strncpy( needle1, needle, sizeof(needle1));
- for( i=0; i<sizeof(haystack1) && haystack1[i]; i++)
- haystack1[i]=tolower( haystack1[i]);
- for( i=0; i<sizeof(needle1) && needle1[i]; i++)
- needle1[i]=tolower( needle1[i]);
- haystack = strstr (haystack1, needle1);
- if (haystack == NULL)
- return FALSE;
- return TRUE;
- }
+ match = TRUE;
+ }
+ free(haystack);
+ }
}
-extern int grep_main (int argc, char **argv)
+extern int grep_main(int argc, char **argv)
{
- FILE *fp;
- const char *needle;
- const char *name;
- const char *cp;
- int tellName=TRUE;
- int ignoreCase=FALSE;
- int tellLine=FALSE;
- long line;
- char buf[BUF_SIZE];
-
- ignoreCase = FALSE;
- tellLine = FALSE;
-
- argc--;
- argv++;
- if (argc < 1) {
- usage(grep_usage);
- }
-
- if (**argv == '-') {
- argc--;
- cp = *argv++;
-
- while (*++cp)
- switch (*cp) {
- case 'i':
- ignoreCase = TRUE;
- break;
-
- case 'h':
- tellName = FALSE;
- break;
-
- case 'n':
- tellLine = TRUE;
- break;
-
- default:
+ FILE *fp;
+ char *needle;
+ char *fileName;
+ int tellName = TRUE;
+ int ignoreCase = FALSE;
+ int tellLine = FALSE;
+ int invertSearch = FALSE;
+
+ if (argc < 1) {
usage(grep_usage);
- }
- }
-
- needle = *argv++;
- argc--;
-
- while (argc-- > 0) {
- name = *argv++;
-
- fp = fopen (name, "r");
- if (fp == NULL) {
- perror (name);
- continue;
+ }
+ argv++;
+
+ while (--argc >= 0 && *argv && (**argv == '-')) {
+ while (*++(*argv)) {
+ switch (**argv) {
+ case 'i':
+ ignoreCase = TRUE;
+ break;
+
+ case 'h':
+ tellName = FALSE;
+ break;
+
+ case 'n':
+ tellLine = TRUE;
+ break;
+
+ case 'q':
+ beQuiet = TRUE;
+ break;
+
+ case 'v':
+ invertSearch = TRUE;
+ break;
+
+ default:
+ usage(grep_usage);
+ }
+ }
+ argv++;
}
- line = 0;
-
- while (fgets (buf, sizeof (buf), fp)) {
- line++;
- cp = &buf[strlen (buf) - 1];
-
- if (*cp != '\n')
- fprintf (stderr, "%s: Line too long\n", name);
-
- if (search (buf, needle, ignoreCase)==TRUE) {
- if (tellName==TRUE)
- printf ("%s: ", name);
-
- if (tellLine==TRUE)
- printf ("%ld: ", line);
-
- fputs (buf, stdout);
- }
+ if (argc == 0 || *argv == NULL) {
+ fatalError(too_few_args, "grep");
}
- if (ferror (fp))
- perror (name);
+ needle = *argv++;
+ argc--;
- fclose (fp);
- }
- exit( TRUE);
+ if (argc == 0) {
+ do_grep(stdin, needle, "stdin", FALSE, ignoreCase, tellLine, invertSearch);
+ } else {
+ /* Never print the filename for just one file */
+ if (argc == 1)
+ tellName = FALSE;
+ while (argc-- > 0) {
+ fileName = *argv++;
+
+ fp = fopen(fileName, "r");
+ if (fp == NULL) {
+ perror(fileName);
+ continue;
+ }
+
+ do_grep(fp, needle, fileName, tellName, ignoreCase, tellLine, invertSearch);
+
+ if (ferror(fp))
+ perror(fileName);
+ fclose(fp);
+ }
+ }
+ return(match);
}
/* END CODE */
-
-
projects / oweals / busybox.git / blobdiff