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
|
/*
* Mini sed 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 sed_usage[] =
"sed [-n] [-e script] [file...]\n"
"Allowed scripts come in the following form:\n\n"
"'s/regexp/replacement/[gp]'\n"
"\tattempt to match regexp against the pattern space\n"
"\tand if successful replaces the matched portion with replacement.\n\n"
"Options:\n"
"-e\tadd the script to the commands to be executed\n"
"-n\tsuppress automatic printing of pattern space\n\n"
#if defined BB_REGEXP
"This version of sed matches full regexps.\n";
#else
"This version of sed matches strings (not full regexps).\n";
#endif
extern int sed_main (int argc, char **argv)
{
FILE *fp;
char *needle=NULL, *newNeedle=NULL;
char *name;
char *cp;
int ignoreCase=FALSE;
int foundOne=FALSE;
int noprintFlag=FALSE;
int stopNow;
char *haystack;
argc--;
argv++;
if (argc < 1) {
usage(sed_usage);
}
if (**argv == '-') {
argc--;
cp = *argv++;
stopNow=FALSE;
while (*++cp && stopNow==FALSE)
switch (*cp) {
case 'n':
noprintFlag = TRUE;
break;
case 'e':
if (*(cp+1)==0 && --argc < 0) {
fprintf(stderr, "A\n");
usage( sed_usage);
}
cp = *argv++;
while( *cp ) {
if (*cp == 's' && strlen(cp) > 3 && *(cp+1) == '/') {
char* pos=needle=cp+2;
for(;;) {
pos = strchr(pos, '/');
if (pos==NULL) {
fprintf(stderr, "B\n");
usage( sed_usage);
}
if (*(pos-1) == '\\') {
pos++;
continue;
}
break;
}
*pos=0;
newNeedle=++pos;
for(;;) {
pos = strchr(pos, '/');
if (pos==NULL) {
fprintf(stderr, "C\n");
usage( sed_usage);
}
if (*(pos-1) == '\\') {
pos++;
continue;
}
break;
}
*pos=0;
}
cp++;
}
fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle);
stopNow=TRUE;
break;
default:
fprintf(stderr, "D\n");
usage(sed_usage);
}
}
fprintf(stderr, "argc=%d\n", argc);
while (argc-- > 0) {
name = *argv++;
fp = fopen (name, "r");
if (fp == NULL) {
perror (name);
continue;
}
fprintf(stderr, "filename is '%s'\n", name);
haystack = (char*)malloc( 80);
while (fgets (haystack, sizeof (haystack), fp)) {
foundOne = replace_match(haystack, needle, newNeedle, ignoreCase);
if (noprintFlag==TRUE && foundOne==TRUE)
fputs (haystack, stdout);
else
fputs (haystack, stdout);
/* Avoid any mem leaks */
free(haystack);
haystack = (char*)malloc( BUF_SIZE);
}
if (ferror (fp))
perror (name);
fclose (fp);
}
exit( TRUE);
}
/* END CODE */
|
