* lib/fts.c (fts_safe_changedir): Add a comment.

[gnulib.git] / lib / fts.c

diff --git a/lib/fts.c b/lib/fts.c
index 75bab3c..bc016d4 100644 (file)
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -1505,6 +1505,11 @@ fts_safe_changedir (FTS *sp, FTSENT *p, int fd, char const *dir)
        int ret;
 
        int newfd = fd;
+
+       /* This clause handles the unusual case in which FTS_NOCHDIR
+          is specified, along with FTS_CWDFD.  In that case, there is
+          no need to change even the virtual cwd file descriptor.
+          However, if FD is non-negative, we do close it here.  */
        if (ISSET(FTS_NOCHDIR)) {
                if (ISSET(FTS_CWDFD) && 0 <= fd)
                        close (fd);