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* [newlib-cygwin] Cygwin: normalize_posix_path: fix error handling when .. is encountered
@ 2021-01-22 15:44 Ken Brown
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From: Ken Brown @ 2021-01-22 15:44 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4aefad2bb827afa273fcd768bd06dd618d41ae75
commit 4aefad2bb827afa273fcd768bd06dd618d41ae75
Author: Ken Brown <kbrown@cornell.edu>
Date: Wed Jan 20 10:12:58 2021 -0500
Cygwin: normalize_posix_path: fix error handling when .. is encountered
When .. is in the source path and the path prefix exists but is not a
directory, return ENOTDIR instead of ENOENT. This fixes a POSIX
compliance issue for realpath(3):
https://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
Addresses: https://lists.gnu.org/archive/html/bug-gnulib/2021-01/msg00214.html
Diff:
---
winsup/cygwin/path.cc | 4 +++-
winsup/cygwin/release/3.2.0 | 4 ++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index abd3687df..6dc162806 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -323,8 +323,10 @@ normalize_posix_path (const char *src, char *dst, char *&tail)
if (!tp.check_usage (4, 3))
return ELOOP;
path_conv head (dst, PC_SYM_FOLLOW | PC_POSIX);
- if (!head.isdir())
+ if (!head.exists ())
return ENOENT;
+ if (!head.isdir ())
+ return ENOTDIR;
/* At this point, dst is a normalized path. If the
normalized path created by path_conv does not
match the normalized path we're just testing, then
diff --git a/winsup/cygwin/release/3.2.0 b/winsup/cygwin/release/3.2.0
index c18a848de..43725cec2 100644
--- a/winsup/cygwin/release/3.2.0
+++ b/winsup/cygwin/release/3.2.0
@@ -48,3 +48,7 @@ Bug Fixes
- Fix a bug in fstatat(2) on 32 bit that could cause it to return garbage.
Addresses: https://cygwin.com/pipermail/cygwin/2021-January/247399.html
+
+- Fix the errno when a path contains .. and the prefix exists but is
+ not a directory.
+ Addresses: https://lists.gnu.org/archive/html/bug-gnulib/2021-01/msg00214.html
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