Canonicalize dirname(3) behavior.

1 files changed, 4 insertions, 2 deletions

diff --git a/archival/tar.c b/archival/tar.c
index cf65798ff..389d7f02e 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -342,9 +342,11 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
         if (extractFlag==TRUE && tostdoutFlag==FALSE) {
                 /* Create the path to the file, just in case it isn't there...
                  * This should not screw up path permissions or anything. */
-                char *dir = dirname (header->name);
+                char *buf, *dir;
+                buf = xstrdup (header->name);
+                dir = dirname (buf);
                 make_directory (dir, -1, FILEUTILS_RECUR);
-                free (dir);
+                free (buf);
                 if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY, 
                                                 header->mode & ~S_IFMT)) < 0) {
                         error_msg(io_error, header->name, strerror(errno));