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Taken from:
https://sourceware.org/git/?p=glibc.git;a=patch;h=39183b953c68a489cc0b9aefb8974711c834fb38
From 39183b953c68a489cc0b9aefb8974711c834fb38 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Mon, 21 Apr 2025 22:21:17 +0200
Subject: [PATCH] hurd: Make symlink return EEXIST on existing target directory
8ef17919509e ("hurd: Fix EINVAL error on linking to a slash-trailing path
[BZ #32569]) made symlink return ENOTDIR, but the gnulib testsuite does
not recognize it for such a situation, and EEXIST is indeed more
comprehensible to users.
---
sysdeps/mach/hurd/symlinkat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sysdeps/mach/hurd/symlinkat.c b/sysdeps/mach/hurd/symlinkat.c
index e7dfb673df..cb6250e6f0 100644
--- a/sysdeps/mach/hurd/symlinkat.c
+++ b/sysdeps/mach/hurd/symlinkat.c
@@ -47,7 +47,7 @@ __symlinkat (const char *from, int fd, const char *to)
if (! *name)
/* Can't link to the existing directory itself. */
- err = ENOTDIR;
+ err = EEXIST;
else
/* Create a new, unlinked node in the target directory. */
err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node);
--
2.49.0
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