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>.
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).
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.
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.
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.
27 * See the COPYING file for license information.
40 /* We are making a lame pseudo-random string generator here. in
41 * convert(), each pass through the while loop will add more and more
42 * stuff into value, which is _supposed_ to wrap. We don't care about
43 * it being accurate. We care about it being messy, since we use it
44 * to pick a random letter to add to out temporary file. */
45 typedef unsigned long int bb_uint64_t;
47 /* if fn is NULL then input is stdin and output is stdout */
48 static int convert(char *fn, int ConvType)
52 RESERVE_CONFIG_BUFFER(tempFn, BUFSIZ);
53 static bb_uint64_t value=0;
57 in = bb_xfopen(fn, "rw");
58 safe_strncpy(tempFn, fn, sizeof(tempFn));
62 /* tempFn is BUFSIZ so the last addressable spot it BUFSIZ-1.
63 * The loop increments by 2. So this must check for BUFSIZ-3. */
65 bb_error_msg_and_die("unique name not found");
66 /* Get some semi random stuff to try and make a
67 * random filename based (and in the same dir as)
68 * the input file... */
69 gettimeofday (&tv, NULL);
70 value += ((bb_uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
71 tempFn[++c] = ((value%62) < 26)?(value%62)+97:
72 ((value%62) < 52)?(value%62)+39:
77 if ((fd = open(tempFn, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0 ) {
80 out = fdopen(fd, "w+");
93 while ((c = fgetc(in)) != EOF) {
95 if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
96 /* file is already in DOS format so it is
97 * not necessary to touch it. */
99 if (fclose(in) < 0 || fclose(out) < 0) {
108 if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
109 /* file is already in DOS format so it is
110 * not necessary to touch it. */
112 if ((fclose(in) < 0) || (fclose(out) < 0)) {
118 if (ConvType == CT_UNIX2DOS) {
124 while (c != EOF && (c = fgetc(in)) != EOF) {
128 if (ConvType == CT_UNIX2DOS)
137 if (fclose(in) < 0 || fclose(out) < 0) {
143 /* Assume they are both on the same filesystem (which
144 * should be true since we put them into the same directory
145 * so we _should_ be ok, but you never know... */
146 if (rename(tempFn, fn) < 0) {
147 bb_perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
155 int dos2unix_main(int argc, char *argv[])
160 /* See if we are supposed to be doing dos2unix or unix2dos */
161 if (argv[0][0]=='d') {
162 ConvType = CT_DOS2UNIX;
164 ConvType = CT_UNIX2DOS;
167 /* process parameters */
168 o = bb_getopt_ulflags(argc, argv, "ud");
170 /* Do the conversion requested by an argument else do the default
171 * conversion depending on our name. */
177 if ((o = convert(argv[optind++], ConvType)) < 0)
181 o = convert(NULL, ConvType);