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GNU C Library master sources branch, master, updated. glibc-2.12-28-g2a50c07
- From: roland at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 2 Jun 2010 17:26:19 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.12-28-g2a50c07
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=2a50c07836d2750baf70442f8f760bf6cd43b3af
commit 2a50c07836d2750baf70442f8f760bf6cd43b3af
Author: Emilio Pozuelo Monfort <pochu27@gmail.com>
Date: Wed Jun 2 10:24:59 2010 -0700
Hurd: Fix linkat symlink handling.
diff --git a/ChangeLog b/ChangeLog
index 918f675..d5f9d30 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2010-06-02 Emilio Pozuelo Monfort <pochu27@gmail.com>
+
+ * hurd/lookup-at.c (__file_name_lookup_at): Accept
+ AT_SYMLINK_FOLLOW in AT_FLAGS. Fail with EINVAL if both
+ AT_SYMLINK_FOLLOW and AT_SYMLINK_NOFOLLOW are present
+ in AT_FLAGS.
+ * hurd/hurd/fd.h (__file_name_lookup_at): Update comment.
+ * sysdeps/mach/hurd/linkat.c (linkat): Pass O_NOLINK in FLAGS.
+
2010-05-28 Luis Machado <luisgpm@br.ibm.com>
* sysdeps/powerpc/powerpc32/power7/memcpy.S: Exchange srdi for srwi.
diff --git a/hurd/hurd/fd.h b/hurd/hurd/fd.h
index d1aa867..2473476 100644
--- a/hurd/hurd/fd.h
+++ b/hurd/hurd/fd.h
@@ -254,8 +254,9 @@ extern int _hurd_select (int nfds, struct pollfd *pollfds,
const sigset_t *sigmask);
/* Variant of file_name_lookup used in *at function implementations.
- AT_FLAGS should contain only AT_SYMLINK_NOFOLLOW; other bits
- cause EINVAL. */
+ AT_FLAGS may only contain AT_SYMLINK_FOLLOW or AT_SYMLINK_NOFOLLOW,
+ which will remove and add O_NOLINK from FLAGS respectively.
+ Other bits cause EINVAL. */
extern file_t __file_name_lookup_at (int fd, int at_flags,
const char *file_name,
int flags, mode_t mode);
diff --git a/hurd/lookup-at.c b/hurd/lookup-at.c
index 7f55527..728a970 100644
--- a/hurd/lookup-at.c
+++ b/hurd/lookup-at.c
@@ -30,8 +30,14 @@ __file_name_lookup_at (int fd, int at_flags,
error_t err;
file_t result;
+ if ((at_flags & AT_SYMLINK_FOLLOW) && (at_flags & AT_SYMLINK_NOFOLLOW))
+ return (__hurd_fail (EINVAL), MACH_PORT_NULL);
+
flags |= (at_flags & AT_SYMLINK_NOFOLLOW) ? O_NOLINK : 0;
at_flags &= ~AT_SYMLINK_NOFOLLOW;
+ if (at_flags & AT_SYMLINK_FOLLOW)
+ flags &= ~O_NOLINK;
+ at_flags &= ~AT_SYMLINK_FOLLOW;
if (at_flags != 0)
return (__hurd_fail (EINVAL), MACH_PORT_NULL);
diff --git a/sysdeps/mach/hurd/linkat.c b/sysdeps/mach/hurd/linkat.c
index 1942144..062d913 100644
--- a/sysdeps/mach/hurd/linkat.c
+++ b/sysdeps/mach/hurd/linkat.c
@@ -1,5 +1,5 @@
/* Make a link between file names relative to open directories. Hurd version.
- Copyright (C) 2006 Free Software Foundation, Inc.
+ Copyright (C) 2006,2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -38,7 +38,9 @@ linkat (fromfd, from, tofd, to, flags)
file_t oldfile, linknode, todir;
char *toname;
- oldfile = __file_name_lookup_at (fromfd, flags, from, 0, 0);
+ /* POSIX says linkat doesn't follow symlinks by default, so pass
+ O_NOLINK. That can be overridden by AT_SYMLINK_FOLLOW in FLAGS. */
+ oldfile = __file_name_lookup_at (fromfd, flags, from, O_NOLINK, 0);
if (oldfile == MACH_PORT_NULL)
return -1;
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 9 +++++++++
hurd/hurd/fd.h | 5 +++--
hurd/lookup-at.c | 6 ++++++
sysdeps/mach/hurd/linkat.c | 6 ++++--
4 files changed, 22 insertions(+), 4 deletions(-)
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