+/* 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"
+#include "libbb.h"
-#define CT_UNIX2DOS 1
-#define CT_DOS2UNIX 2
-
-/* 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 use it
- * to pick a random letter to add to out temporary file. */
-typedef unsigned long int bb_uint64_t;
+enum {
+ CT_UNIX2DOS = 1,
+ CT_DOS2UNIX
+};
/* if fn is NULL then input is stdin and output is stdout */
-static int convert(char *fn, int ConvType)
+static void convert(char *fn, int conv_type)
{
- int c, fd;
- struct timeval tv;
- RESERVE_CONFIG_BUFFER(tempFn, BUFSIZ);
- static bb_uint64_t value=0;
FILE *in, *out;
+ int i;
+ char *temp_fn = temp_fn; /* for compiler */
+ char *resolved_fn = resolved_fn;
+ in = stdin;
+ out = stdout;
if (fn != NULL) {
- in = bb_xfopen(fn, "rw");
- safe_strncpy(tempFn, fn, sizeof(tempFn));
- c = strlen(tempFn);
- tempFn[c] = '.';
- while(1) {
- /* tempFn is BUFSIZ so the last addressable spot it BUFSIZ-1.
- * The loop increments by 2. So this must check for BUFSIZ-3. */
- if (c >=BUFSIZ-3)
- bb_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] = ((value%62) < 26)?(value%62)+97:
- ((value%62) < 52)?(value%62)+39:
- (value%62)-4;
- 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;
+ struct stat st;
+
+ resolved_fn = xmalloc_follow_symlinks(fn);
+ if (resolved_fn == NULL)
+ bb_simple_perror_msg_and_die(fn);
+ in = xfopen_for_read(resolved_fn);
+ fstat(fileno(in), &st);
+
+ temp_fn = xasprintf("%sXXXXXX", resolved_fn);
+ i = mkstemp(temp_fn);
+ if (i == -1
+ || fchmod(i, st.st_mode) == -1
+ || !(out = fdopen(i, "w+"))
+ ) {
+ bb_simple_perror_msg_and_die(temp_fn);
}
- } else {
- in = stdin;
- out = stdout;
}
- while ((c = fgetc(in)) != EOF) {
- if (c == '\r') {
- if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
- /* file is already in DOS format so it is
- * not necessary to touch it. */
- remove(tempFn);
- if (fclose(in) < 0 || fclose(out) < 0) {
- bb_perror_nomsg();
- return -2;
- }
- return 0;
- }
- break;
- }
- if (c == '\n') {
- if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
- /* file is already in DOS format so it is
- * not necessary to touch it. */
- remove(tempFn);
- if ((fclose(in) < 0) || (fclose(out) < 0)) {
- bb_perror_nomsg();
- return -2;
- }
- return 0;
- }
- if (ConvType == CT_UNIX2DOS) {
- fputc('\r', out);
- }
- }
- fputc(c, out);
- }
- while (c != EOF && (c = fgetc(in)) != EOF) {
- if (c == '\r')
+ while ((i = fgetc(in)) != EOF) {
+ if (i == '\r')
continue;
- if (c == '\n') {
- if (ConvType == CT_UNIX2DOS)
+ if (i == '\n')
+ if (conv_type == 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) {
- bb_perror_nomsg();
- 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) {
- bb_perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
- return -1;
- }
+ if (fclose(in) < 0 || fclose(out) < 0) {
+ unlink(temp_fn);
+ bb_perror_nomsg_and_die();
+ }
+ xrename(temp_fn, resolved_fn);
+ free(temp_fn);
+ free(resolved_fn);
}
-
- return 0;
}
-int dos2unix_main(int argc, char *argv[])
+int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc, char **argv)
{
- int ConvType;
- int o;
+ int o, conv_type;
/* See if we are supposed to be doing dos2unix or unix2dos */
- if (argv[0][0]=='d') {
- ConvType = CT_DOS2UNIX;
- } else {
- ConvType = CT_UNIX2DOS;
+ conv_type = CT_UNIX2DOS;
+ if (applet_name[0] == 'd') {
+ conv_type = CT_DOS2UNIX;
}
- /* process parameters */
- o = bb_getopt_ulflags(argc, argv, "ud");
+ /* -u convert to unix, -d convert to dos */
+ opt_complementary = "u--d:d--u"; /* mutually exclusive */
+ o = getopt32(argv, "du");
/* Do the conversion requested by an argument else do the default
* conversion depending on our name. */
if (o)
- ConvType = o;
+ conv_type = o;
- if (optind < argc) {
- while(optind < argc)
- if ((o = convert(argv[optind++], ConvType)) < 0)
- break;
- }
- else
- o = convert(NULL, ConvType);
+ do {
+ /* might be convert(NULL) if there is no filename given */
+ convert(argv[optind], conv_type);
+ optind++;
+ } while (optind < argc);
- return o;
+ return 0;
}
-
projects / oweals / busybox.git / blobdiff