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[PATCH] fts: reduce two or more trailing spaces to just one, usually
From: |
Jim Meyering |
Subject: |
[PATCH] fts: reduce two or more trailing spaces to just one, usually |
Date: |
Tue, 04 Sep 2012 12:24:05 +0200 |
FYI, this is part of the solution to a minor problem with rm:
it would print a bogus ELOOP diagnostic when failing to remove
the slash-decorated name of a symlink-to-directory:
$ mkdir d && ln -s d s && env rm -r s/
rm: cannot remove 's': Too many levels of symbolic links
With the change below and a trivial don't-trim-trailing-slashes
adjustment to remove.c, it does this:
$ env rm -r s/
rm: cannot remove 's/': Not a directory
>From 99376a06eed07ded17919384cf1d633e43ad1bd0 Mon Sep 17 00:00:00 2001
From: Jim Meyering <address@hidden>
Date: Tue, 4 Sep 2012 11:36:38 +0200
Subject: [PATCH] fts: reduce two or more trailing spaces to just one, usually
* lib/fts.c (fts_open): Upon initialization, if a name ends in two
or more slashes, trim all but the final one. But if a name consists
solely of two or more slashes, reduce it to "//", not to "/".
This is part of the solution to a minor problem with rm:
it would print a bogus ELOOP diagnostic when failing to remove
the slash-decorated name of a symlink-to-directory:
$ mkdir d && ln -s d s && env rm -r s/
rm: cannot remove 's': Too many levels of symbolic links
With the change below and a trivial don't-trim-trailing-slashes
adjustment to remove.c, it does this:
$ env rm -r s/
rm: cannot remove 's/': Not a directory
---
ChangeLog | 18 ++++++++++++++++++
lib/fts.c | 8 ++++++++
2 files changed, 26 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index d4d2cb1..c7c2ad3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,23 @@
2012-09-04 Jim Meyering <address@hidden>
+ fts: reduce two or more trailing spaces to just one, usually
+ * lib/fts.c (fts_open): Upon initialization, if a name ends in two
+ or more slashes, trim all but the final one. But if a name consists
+ solely of two or more slashes, reduce it to "//", not to "/".
+
+ This is part of the solution to a minor problem with rm:
+ it would print a bogus ELOOP diagnostic when failing to remove
+ the slash-decorated name of a symlink-to-directory:
+
+ $ mkdir d && ln -s d s && env rm -r s/
+ rm: cannot remove 's': Too many levels of symbolic links
+
+ With the change below and a trivial don't-trim-trailing-slashes
+ adjustment to remove.c, it does this:
+
+ $ env rm -r s/
+ rm: cannot remove 's/': Not a directory
+
fts: when there is no risk of overlap, use memcpy, not memmove
* lib/fts.c (fts_alloc): Fix unjustified memcopy: s/memmove/memcpy/
diff --git a/lib/fts.c b/lib/fts.c
index ce14a80..a9db89a 100644
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -487,6 +487,14 @@ fts_open (char * const *argv,
for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
/* *Do* allow zero-length file names. */
size_t len = strlen(*argv);
+
+ /* If there are two or more trailing slashes, trim all but one,
+ but don't change "//" to "/". */
+ char const *v = *argv;
+ if (2 < len && v[len - 1] == '/')
+ while (2 < len && v[len - 2] == '/')
+ --len;
+
if ((p = fts_alloc(sp, *argv, len)) == NULL)
goto mem3;
p->fts_level = FTS_ROOTLEVEL;
--
1.7.12.176.g3fc0e4c
- [PATCH] fts: reduce two or more trailing spaces to just one, usually,
Jim Meyering <=