+/* vi: set sw=4 ts=4: */
/*
* dos2unix for BusyBox
*
* dos2unix '\n' convertor 0.5.0
- * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
+ * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
* Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
* All rights reserved.
*
* dos2unix filters reading input from stdin and writing output to stdout.
- * Without arguments it reverts the format (e.i. if source is in UNIX format,
- * output is in DOS format and vice versa).
*
- * 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.
- *
- * See the COPYING file for license information.
- */
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+*/
-#include <string.h>
-#include <getopt.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <fcntl.h>
-#include <sys/time.h>
#include "busybox.h"
-/* We are making a lame pseudo-random string generator here. in
- * convert(), each pass through the while loop will add more and more
- * stuff into value, which is _supposed_ to wrap. We don't care about
- * it being accurate. We care about it being messy, since we then mod
- * it by the sizeof(letters) and then use that as an index into letters
- * to pick a random letter to add to out temporary file. */
-typedef unsigned long int bb_uint64_t;
+enum ConvType {
+ CT_UNIX2DOS = 1,
+ CT_DOS2UNIX
+} ConvType;
-static const char letters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-
-// if fn is NULL then input is stdin and output is stdout
-static int convert(char *fn, int ConvType)
+/* if fn is NULL then input is stdin and output is stdout */
+static int convert(char *fn)
{
- int c, fd;
- struct timeval tv;
- char tempFn[BUFSIZ];
- static bb_uint64_t value=0;
- FILE *in = stdin, *out = stdout;
+ FILE *in, *out;
+ int i;
if (fn != NULL) {
- if ((in = wfopen(fn, "rw")) == NULL) {
- return -1;
+ in = xfopen(fn, "rw");
+ /*
+ The file is then created with mode read/write and
+ permissions 0666 for glibc 2.0.6 and earlier or
+ 0600 for glibc 2.0.7 and later.
+ */
+ snprintf(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), "%sXXXXXX", fn);
+ /*
+ sizeof bb_common_bufsiz1 is 4096, so it should be big enough to
+ hold the full path. However if the output is truncated the
+ subsequent call to mkstemp would fail.
+ */
+ if ((i = mkstemp(&bb_common_bufsiz1[0])) == -1
+ || chmod(bb_common_bufsiz1, 0600) == -1) {
+ bb_perror_nomsg_and_die();
}
- safe_strncpy(tempFn, fn, sizeof(tempFn));
- c = strlen(tempFn);
- tempFn[c] = '.';
- while(1) {
- if (c >=BUFSIZ)
- error_msg_and_die("unique name not found");
- /* Get some semi random stuff to try and make a
- * random filename based (and in the same dir as)
- * the input file... */
- gettimeofday (&tv, NULL);
- value += ((bb_uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
- tempFn[++c] = letters[value % 62];
- tempFn[c+1] = '\0';
- value /= 62;
-
- if ((fd = open(tempFn, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0 ) {
- continue;
- }
- out = fdopen(fd, "w+");
- if (!out) {
- close(fd);
- remove(tempFn);
- continue;
- }
- break;
+ out = fdopen(i, "w+");
+ if (!out) {
+ close(i);
+ remove(bb_common_bufsiz1);
}
+ } else {
+ in = stdin;
+ out = stdout;
}
- while ((c = fgetc(in)) != EOF) {
- if (c == '\r') {
- if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
- // file is alredy in DOS format so it is not necessery to touch it
- remove(tempFn);
- if (fclose(in) < 0 || fclose(out) < 0) {
- perror_msg(NULL);
- return -2;
- }
- return 0;
- }
- if (!ConvType)
- ConvType = CT_DOS2UNIX;
- break;
- }
- if (c == '\n') {
- if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
- // file is alredy in UNIX format so it is not necessery to touch it
- remove(tempFn);
- if ((fclose(in) < 0) || (fclose(out) < 0)) {
- perror_msg(NULL);
- return -2;
- }
- return 0;
- }
- if (!ConvType) {
- ConvType = CT_UNIX2DOS;
- }
- if (ConvType == CT_UNIX2DOS) {
+ while ((i = fgetc(in)) != EOF) {
+ if (i == '\r')
+ continue;
+ if (i == '\n') {
+ if (ConvType == CT_UNIX2DOS)
fputc('\r', out);
- }
fputc('\n', out);
- break;
+ continue;
}
- fputc(c, out);
- }
- if (c != EOF)
- while ((c = fgetc(in)) != EOF) {
- if (c == '\r')
- continue;
- if (c == '\n') {
- if (ConvType == CT_UNIX2DOS)
- fputc('\r', out);
- fputc('\n', out);
- continue;
- }
- fputc(c, out);
+ fputc(i, out);
}
if (fn != NULL) {
- if (fclose(in) < 0 || fclose(out) < 0) {
- perror_msg(NULL);
- remove(tempFn);
- return -2;
- }
-
- /* Assume they are both on the same filesystem (which
- * should be true since we put them into the same directory
- * so we _should_ be ok, but you never know... */
- if (rename(tempFn, fn) < 0) {
- perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
- return -1;
- }
+ if (fclose(in) < 0 || fclose(out) < 0) {
+ bb_perror_nomsg();
+ remove(bb_common_bufsiz1);
+ return -2;
+ }
+ /* Assume they are both on the same filesystem (which
+ * should be true since we put them into the same directory
+ * so we _should_ be ok, but you never know... */
+ if (rename(bb_common_bufsiz1, fn) < 0) {
+ bb_perror_msg("cannot rename '%s' as '%s'", bb_common_bufsiz1, fn);
+ return -1;
+ }
}
return 0;
}
-int dos2unix_main(int argc, char *argv[])
+int dos2unix_main(int argc, char *argv[])
{
- int ConvType = CT_AUTO;
int o;
- //See if we are supposed to be doing dos2unix or unix2dos
- if (argv[0][0]=='d') {
- ConvType = CT_DOS2UNIX;
- }
- if (argv[0][0]=='u') {
- ConvType = CT_UNIX2DOS;
- }
-
- // process parameters
- while ((o = getopt(argc, argv, "du")) != EOF) {
- switch (o) {
- case 'd':
- ConvType = CT_UNIX2DOS;
- break;
- case 'u':
- ConvType = CT_DOS2UNIX;
- break;
- default:
- show_usage();
- }
+ /* See if we are supposed to be doing dos2unix or unix2dos */
+ if (applet_name[0] == 'd') {
+ ConvType = CT_DOS2UNIX; /*2 */
+ } else {
+ ConvType = CT_UNIX2DOS; /*1 */
}
+ /* -u and -d are mutally exclusive */
+ opt_complementary = "?:u--d:d--u";
+ /* process parameters */
+ /* -u convert to unix */
+ /* -d convert to dos */
+ o = getopt32(argc, argv, "du");
+
+ /* Do the conversion requested by an argument else do the default
+ * conversion depending on our name. */
+ if (o)
+ ConvType = o;
if (optind < argc) {
- while(optind < argc)
- if ((o = convert(argv[optind++], ConvType)) < 0)
+ while (optind < argc)
+ if ((o = convert(argv[optind++])) < 0)
break;
- }
- else
- o = convert(NULL, ConvType);
+ } else
+ o = convert(NULL);
return o;
}
-
projects / oweals / busybox.git / blobdiff