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
|
/*
* 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 [OPTIONS]... PATTERN [FILE]...\n\n"
"Search 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\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
static void do_grep(FILE *fp, char* needle, char *fileName, int tellName, int ignoreCase, int tellLine)
{
char *cp;
long line = 0;
char haystack[BUF_SIZE];
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) == TRUE) {
if (tellName==TRUE)
printf ("%s:", fileName);
if (tellLine==TRUE)
printf ("%ld:", line);
fputs (haystack, stdout);
}
}
}
extern int grep_main (int argc, char **argv)
{
FILE *fp;
char *cp;
char *needle;
char *fileName;
int tellName=FALSE;
int ignoreCase=FALSE;
int tellLine=FALSE;
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 = TRUE;
break;
case 'n':
tellLine = TRUE;
break;
default:
usage(grep_usage);
}
}
needle = *argv++;
argc--;
if (argc==0) {
do_grep( stdin, needle, "stdin", FALSE, ignoreCase, tellLine);
} else {
while (argc-- > 0) {
fileName = *argv++;
fp = fopen (fileName, "r");
if (fp == NULL) {
perror (fileName);
continue;
}
do_grep( fp, needle, fileName, tellName, ignoreCase, tellLine);
if (ferror (fp))
perror (fileName);
fclose (fp);
}
}
exit( TRUE);
}
/* END CODE */
|
