+/* 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <getopt.h>
-#include "busybox.h"
-
-#define CT_AUTO 0
-#define CT_UNIX2DOS 1
-#define CT_DOS2UNIX 2
-
-int convert(char *fn, int ConvType);
-
-int dos2unix_main(int argc, char *argv[]) {
- int ConvType = CT_AUTO;
- int o;
-
- // 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();
- }
- }
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+*/
- if (optind < argc) {
- while(optind < argc)
- if ((o = convert(argv[optind++], ConvType)) < 0)
- break;
- }
- else
- o = convert(NULL, ConvType);
+//usage:#define dos2unix_trivial_usage
+//usage: "[-ud] [FILE]"
+//usage:#define dos2unix_full_usage "\n\n"
+//usage: "Convert FILE in-place from DOS to Unix format.\n"
+//usage: "When no file is given, use stdin/stdout.\n"
+//usage: "\n -u dos2unix"
+//usage: "\n -d unix2dos"
+//usage:
+//usage:#define unix2dos_trivial_usage
+//usage: "[-ud] [FILE]"
+//usage:#define unix2dos_full_usage "\n\n"
+//usage: "Convert FILE in-place from Unix to DOS format.\n"
+//usage: "When no file is given, use stdin/stdout.\n"
+//usage: "\n -u dos2unix"
+//usage: "\n -d unix2dos"
- return o;
-}
+#include "libbb.h"
-// if fn is NULL then input is stdin and output is stdout
-int convert(char *fn, int ConvType) {
- char c;
- char *tempFn = NULL;
- FILE *in = stdin, *out = stdout;
+/* This is a NOEXEC applet. Be very careful! */
+enum {
+ CT_UNIX2DOS = 1,
+ CT_DOS2UNIX
+};
+
+/* if fn is NULL then input is stdin and output is stdout */
+static void convert(char *fn, int conv_type)
+{
+ FILE *in, *out;
+ int i;
+ char *temp_fn = temp_fn; /* for compiler */
+ char *resolved_fn = resolved_fn;
+
+ in = stdin;
+ out = stdout;
if (fn != NULL) {
- if ((in = fopen(fn, "r")) == NULL) {
- perror_msg(fn);
- return -1;
- }
- tempFn = tmpnam(NULL);
- if (tempFn == NULL || (out = fopen(tempFn, "w")) == NULL) {
- perror_msg(NULL);
- return -2;
- }
+ 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 = xmkstemp(temp_fn);
+ if (fchmod(i, st.st_mode) == -1)
+ bb_simple_perror_msg_and_die(temp_fn);
+
+ out = xfdopen_for_write(i);
}
- 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
- if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 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
- if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 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 (conv_type == CT_UNIX2DOS)
fputc('\r', out);
- fputc('\n', out);
- break;
- }
- 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 ||
- (in = fopen(tempFn, "r")) == NULL || (out = fopen(fn, "w")) == NULL) {
- perror_msg(NULL);
- return -2;
- }
-
- while ((c = fgetc(in)) != EOF)
- fputc(c, out);
-
- if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
- perror_msg(NULL);
- return -2;
- }
+ 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);
+ }
+}
+
+int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc UNUSED_PARAM, char **argv)
+{
+ int o, conv_type;
+
+ /* See if we are supposed to be doing dos2unix or unix2dos */
+ conv_type = CT_UNIX2DOS;
+ if (applet_name[0] == 'd') {
+ conv_type = CT_DOS2UNIX;
}
+ /* -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)
+ conv_type = o;
+
+ argv += optind;
+ do {
+ /* might be convert(NULL) if there is no filename given */
+ convert(*argv, conv_type);
+ } while (*argv && *++argv);
+
return 0;
}
projects / platform / upstream / busybox.git / blobdiff