coreutils/coreutils-dddoubleclose.patch

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diff -urNp coreutils-6.10-orig/src/dd.c coreutils-6.10/src/dd.c
--- coreutils-6.10-orig/src/dd.c 2007-12-06 14:22:42.000000000 +0100
+++ coreutils-6.10/src/dd.c 2008-03-11 12:48:12.000000000 +0100
@@ -391,6 +391,25 @@ static char const ebcdic_to_ascii[] =
'\070', '\071', '\372', '\373', '\374', '\375', '\376', '\377'
};
+/* True if we need to close the standard output *stream*. */
+static bool close_stdout_required = true;
+
+/* The only reason to close the standard output *stream* is if
+ parse_long_options fails (as it does for --help or --version).
+ In any other case, dd uses only the STDOUT_FILENO file descriptor,
+ and the "cleanup" function calls "close (STDOUT_FILENO)".
+ Closing the file descriptor and then letting the usual atexit-run
+ close_stdout function call "fclose (stdout)" would result in a
+ harmless failure of the close syscall (with errno EBADF).
+ This function serves solely to avoid the unnecessary close_stdout
+ call, once parse_long_options has succeeded. */
+static void
+maybe_close_stdout (void)
+{
+ if (close_stdout_required)
+ close_stdout ();
+}
+
void
usage (int status)
{
@@ -1639,12 +1658,14 @@ main (int argc, char **argv)
textdomain (PACKAGE);
/* Arrange to close stdout if parse_long_options exits. */
- atexit (close_stdout);
+ atexit (maybe_close_stdout);
page_size = getpagesize ();
parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE, VERSION,
usage, AUTHORS, (char const *) NULL);
+ close_stdout_required = false;
+
if (getopt_long (argc, argv, "", NULL, NULL) != -1)
usage (EXIT_FAILURE);