1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* vi: set sw=4 ts=4: */
/*
* Mini grep implementation for busybox
*
*
* 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
* 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
*
*/
/*
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 <fcntl.h>
#include <signal.h>
#include <time.h>
#include <ctype.h>
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 expresions.\n";
#else
"This version of grep matches strings (not regular expresions).\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)
{
char *cp;
long line = 0;
char haystack[BUF_SIZE];
int truth = !invertSearch;
while (fgets(haystack, sizeof(haystack), fp)) {
line++;
cp = &haystack[strlen(haystack) - 1];
if (*cp != '\n')
fprintf(stderr, "%s: Line too long\n", fileName);
if (find_match(haystack, needle, ignoreCase) == truth) {
if (tellName == TRUE)
printf("%s:", fileName);
if (tellLine == TRUE)
printf("%ld:", line);
if (beQuiet == FALSE)
fputs(haystack, stdout);
match = TRUE;
}
}
}
extern int grep_main(int argc, char **argv)
{
FILE *fp;
char *cp;
char *needle;
char *fileName;
int tellName = TRUE;
int ignoreCase = FALSE;
int tellLine = FALSE;
int invertSearch = 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;
case 'q':
beQuiet = TRUE;
break;
case 'v':
invertSearch = TRUE;
break;
default:
usage(grep_usage);
}
}
needle = *argv++;
argc--;
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);
}
}
exit(match);
}
/* END CODE */
|
