From f3f9062ecfb6893ca55094861c0a5e9f5ddba607 Mon Sep 17 00:00:00 2001
From: Eric Andersen
Date: Tue, 18 Dec 2001 00:57:55 +0000
Subject: Things like 'tar -c /tmp/*' and 'tar -cO /tmp/*' where the output
 filename was not explicitly specified were segfaulting.  -Erik

---
 archival/tar.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'archival')

diff --git a/archival/tar.c b/archival/tar.c
index 5f3f567..9792f6b 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -459,7 +459,7 @@ static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
 		error_msg_and_die("Cowardly refusing to create an empty archive");
 
 	/* Open the tar file for writing.  */
-	if (!strcmp(tarName, "-"))
+	if (tarName == NULL || !strcmp(tarName, "-"))
 		tbInfo.tarFd = fileno(stdout);
 	else
 		tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
@@ -694,6 +694,10 @@ int tar_main(int argc, char **argv)
 		optind++;
 	}
 
+	if (src_filename == NULL) {
+		extract_function |= extract_to_stdout;
+	}
+
 	if (extract_function & (extract_list | extract_all_to_fs)) {
 		if (dst_prefix == NULL) {
 			dst_prefix = xstrdup("./");
-- 
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