inetd: comment tweak. no code changes

[oweals/busybox.git] / coreutils / dos2unix.c

diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
index ed2088e4e298efa5379e0f7d6697aa0be9ba449f..309cbc3b819b962e388fd338d513934af9680eb0 100644 (file)
--- a/coreutils/dos2unix.c
+++ b/coreutils/dos2unix.c
@@ -1,45 +1,98 @@
+/* vi: set sw=4 ts=4: */
 /*
-    Mini dos2unix implementation for busybox
- 
-    Copyright 1994,1995  Patrick Volkerding, Moorhead, Minnesota USA
-    All rights reserved.
-
- Redistribution and use of this source code, with or without modification, is
- permitted provided that the following condition is met:
-
- 1. Redistributions of this source code must retain the above copyright
-    notice, this condition, and the following disclaimer.
-
-  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
-  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
-  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * dos2unix for BusyBox
+ *
+ * dos2unix '\n' convertor 0.5.0
+ * 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.
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */
 
-#include "busybox.h"
-#include <stdio.h>
+#include "libbb.h"
 
-int dos2unix_main( int argc, char **argv ) {
-       int c;
-       if (argc > 1) {
-               c = *argv[1];
-               if (c == '-') {
-                usage(dos2unix_usage);
-               } 
+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) {
+               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);
+               }
+       }
+
+       while ((i = fgetc(in)) != EOF) {
+               if (i == '\r')
+                       continue;
+               if (i == '\n')
+                       if (conv_type == CT_UNIX2DOS)
+                               fputc('\r', out);
+               fputc(i, out);
+       }
+
+       if (fn != NULL) {
+               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);
        }
-       c = getchar();
-       while (c != EOF) {
-               /* Eat any \r's... they shouldn't be here */
-               while (c == '\r') c = getchar();
-               if (c == EOF) break;
-                putchar(c);
-                c = getchar();
-       } 
-       return EXIT_SUCCESS;
+}
+
+int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc, 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;
+
+       do {
+               /* might be convert(NULL) if there is no filename given */
+               convert(argv[optind], conv_type);
+               optind++;
+       } while (optind < argc);
+
+       return 0;
 }