fts: fts_open: do not let an empty string cause immediate failure

This is required in support of GNU rm, for which the command
"rm A '' B" must process and remove both A and B, in spite of
the empty string argument.
* lib/fts.c (fts_open): Do not let the presence of an empty string
cause fts_open to fail immediately.  Most fts-using tools must be
able to process all arguments, in order, and can be expected to
diagnose such arguments themselves.
Also, move declaration of local, "len", "down" to initialization.

diff --git a/ChangeLog b/ChangeLog
index 07918de..6eec830 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2009-12-01  Jim Meyering  <meyering@redhat.com>
+
+       fts: fts_open: do not let an empty string cause immediate failure
+       This is required in support of GNU rm, for which the command
+       "rm A '' B" must process and remove both A and B, in spite of
+       the empty string argument.
+       * lib/fts.c (fts_open): Do not let the presence of an empty string
+       cause fts_open to fail immediately.  Most fts-using tools must be
+       able to process all arguments, in order, and can be expected to
+       diagnose such arguments themselves.
+
 2009-11-30  Eric Blake  <ebb9@byu.net>
 
        utimens: fix compilation error

diff --git a/lib/fts.c b/lib/fts.c
index 21c6658..39922b6 100644 (file)
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -375,7 +375,6 @@ fts_open (char * const *argv,
        register size_t nitems;
        FTSENT *parent = NULL;
        FTSENT *tmp = NULL;     /* pacify gcc */
-       size_t len;
        bool defer_stat;
 
        /* Options check. */
@@ -474,12 +473,8 @@ fts_open (char * const *argv,
 
        /* Allocate/initialize root(s). */
        for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
-               /* Don't allow zero-length file names. */
-               if ((len = strlen(*argv)) == 0) {
-                       __set_errno (ENOENT);
-                       goto mem3;
-               }
-
+               /* *Do* allow zero-length file names. */
+               size_t len = strlen(*argv);
                if ((p = fts_alloc(sp, *argv, len)) == NULL)
                        goto mem3;
                p->fts_level = FTS_ROOTLEVEL;