135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
/*
|
|
* Mini grep implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 1999 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
|
|
* 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 "internal.h"
|
|
#include "regexp.h"
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <ctype.h>
|
|
|
|
static 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"
|
|
#if defined BB_REGEXP
|
|
"This version of grep matches full regexps.\n";
|
|
#else
|
|
"This version of grep matches strings (not full regexps).\n";
|
|
#endif
|
|
|
|
|
|
extern int grep_main (int argc, char **argv)
|
|
{
|
|
FILE *fp;
|
|
char *needle;
|
|
char *name;
|
|
char *cp;
|
|
int tellName=TRUE;
|
|
int ignoreCase=FALSE;
|
|
int tellLine=FALSE;
|
|
long line;
|
|
char haystack[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:
|
|
usage(grep_usage);
|
|
}
|
|
}
|
|
|
|
needle = *argv++;
|
|
argc--;
|
|
|
|
while (argc-- > 0) {
|
|
name = *argv++;
|
|
|
|
fp = fopen (name, "r");
|
|
if (fp == NULL) {
|
|
perror (name);
|
|
continue;
|
|
}
|
|
|
|
line = 0;
|
|
|
|
while (fgets (haystack, sizeof (haystack), fp)) {
|
|
line++;
|
|
cp = &haystack[strlen (haystack) - 1];
|
|
|
|
if (*cp != '\n')
|
|
fprintf (stderr, "%s: Line too long\n", name);
|
|
|
|
if (find_match(haystack, needle, ignoreCase) == TRUE) {
|
|
if (tellName==TRUE)
|
|
printf ("%s: ", name);
|
|
|
|
if (tellLine==TRUE)
|
|
printf ("%ld: ", line);
|
|
|
|
fputs (haystack, stdout);
|
|
}
|
|
}
|
|
|
|
if (ferror (fp))
|
|
perror (name);
|
|
|
|
fclose (fp);
|
|
}
|
|
exit( TRUE);
|
|
}
|
|
|
|
|
|
/* END CODE */
|
|
|
|
|