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-rw-r--r--dos2unix.c194
1 files changed, 0 insertions, 194 deletions
diff --git a/dos2unix.c b/dos2unix.c
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1/*
2 * dos2unix for BusyBox
3 *
4 * dos2unix '\n' convertor 0.5.0
5 * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
6 * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
7 * All rights reserved.
8 *
9 * dos2unix filters reading input from stdin and writing output to stdout.
10 * Without arguments it reverts the format (e.i. if source is in UNIX format,
11 * output is in DOS format and vice versa).
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 *
27 * See the COPYING file for license information.
28 */
29
30#include <string.h>
31#include <getopt.h>
32#include <unistd.h>
33#include <stdint.h>
34#include <fcntl.h>
35#include <sys/time.h>
36#include "busybox.h"
37
38/* We are making a lame pseudo-random string generator here. in
39 * convert(), each pass through the while loop will add more and more
40 * stuff into value, which is _supposed_ to wrap. We don't care about
41 * it being accurate. We care about it being messy, since we then mod
42 * it by the sizeof(letters) and then use that as an index into letters
43 * to pick a random letter to add to out temporary file. */
44typedef unsigned long int bb_uint64_t;
45
46static const char letters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
47
48// if fn is NULL then input is stdin and output is stdout
49static int convert(char *fn, int ConvType)
50{
51 int c, fd;
52 struct timeval tv;
53 char tempFn[BUFSIZ];
54 static bb_uint64_t value=0;
55 FILE *in = stdin, *out = stdout;
56
57 if (fn != NULL) {
58 if ((in = wfopen(fn, "rw")) == NULL) {
59 return -1;
60 }
61 strcpy(tempFn, fn);
62 c = strlen(tempFn);
63 tempFn[c] = '.';
64 while(1) {
65 if (c >=BUFSIZ)
66 error_msg_and_die("unique name not found");
67 /* Get some semi random stuff to try and make a
68 * random filename based (and in the same dir as)
69 * the input file... */
70 gettimeofday (&tv, NULL);
71 value += ((bb_uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
72 tempFn[++c] = letters[value % 62];
73 tempFn[c+1] = '\0';
74 value /= 62;
75
76 if ((fd = open(tempFn, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0 ) {
77 continue;
78 }
79 out = fdopen(fd, "w+");
80 if (!out) {
81 close(fd);
82 remove(tempFn);
83 continue;
84 }
85 break;
86 }
87 }
88
89 while ((c = fgetc(in)) != EOF) {
90 if (c == '\r') {
91 if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
92 // file is alredy in DOS format so it is not necessery to touch it
93 remove(tempFn);
94 if (fclose(in) < 0 || fclose(out) < 0) {
95 perror_msg(NULL);
96 return -2;
97 }
98 return 0;
99 }
100 if (!ConvType)
101 ConvType = CT_DOS2UNIX;
102 break;
103 }
104 if (c == '\n') {
105 if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
106 // file is alredy in UNIX format so it is not necessery to touch it
107 remove(tempFn);
108 if ((fclose(in) < 0) || (fclose(out) < 0)) {
109 perror_msg(NULL);
110 return -2;
111 }
112 return 0;
113 }
114 if (!ConvType) {
115 ConvType = CT_UNIX2DOS;
116 }
117 if (ConvType == CT_UNIX2DOS) {
118 fputc('\r', out);
119 }
120 fputc('\n', out);
121 break;
122 }
123 fputc(c, out);
124 }
125 if (c != EOF)
126 while ((c = fgetc(in)) != EOF) {
127 if (c == '\r')
128 continue;
129 if (c == '\n') {
130 if (ConvType == CT_UNIX2DOS)
131 fputc('\r', out);
132 fputc('\n', out);
133 continue;
134 }
135 fputc(c, out);
136 }
137
138 if (fn != NULL) {
139 if (fclose(in) < 0 || fclose(out) < 0) {
140 perror_msg(NULL);
141 remove(tempFn);
142 return -2;
143 }
144
145 /* Assume they are both on the same filesystem (which
146 * should be true since we put them into the same directory
147 * so we _should_ be ok, but you never know... */
148 if (rename(tempFn, fn) < 0) {
149 perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
150 return -1;
151 }
152 }
153
154 return 0;
155}
156
157int dos2unix_main(int argc, char *argv[])
158{
159 int ConvType = CT_AUTO;
160 int o;
161
162 //See if we are supposed to be doing dos2unix or unix2dos
163 if (argv[0][0]=='d') {
164 ConvType = CT_DOS2UNIX;
165 }
166 if (argv[0][0]=='u') {
167 ConvType = CT_UNIX2DOS;
168 }
169
170 // process parameters
171 while ((o = getopt(argc, argv, "du")) != EOF) {
172 switch (o) {
173 case 'd':
174 ConvType = CT_UNIX2DOS;
175 break;
176 case 'u':
177 ConvType = CT_DOS2UNIX;
178 break;
179 default:
180 show_usage();
181 }
182 }
183
184 if (optind < argc) {
185 while(optind < argc)
186 if ((o = convert(argv[optind++], ConvType)) < 0)
187 break;
188 }
189 else
190 o = convert(NULL, ConvType);
191
192 return o;
193}
194
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