From c12753e19434bed1e4d514aacbd4f5bd79d06926 Mon Sep 17 00:00:00 2001
From: netchild <netchild@FreeBSD.org>
Date: Sun, 10 Sep 2006 13:47:56 +0000
Subject: The Linux unlink syscall uses a different errno value when trying to
 unlink a directory.

PR:		102897 [1]
Noticed by:	Knut Anders Hatlen <kahatlen@gmail.com>, testrun with LTP [1]
Submitted by:	Marcin Cieslak <saper@SYSTEM.PL>
Tested by:	netchild (LTP test run)
---
 sys/compat/linux/linux_file.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'sys/compat/linux/linux_file.c')

diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index cd50aa4..327f604 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/mount.h>
 #include <sys/mutex.h>
 #include <sys/proc.h>
+#include <sys/stat.h>
 #include <sys/syscallsubr.h>
 #include <sys/sysproto.h>
 #include <sys/tty.h>
@@ -495,6 +496,7 @@ linux_unlink(struct thread *td, struct linux_unlink_args *args)
 {
 	char *path;
 	int error;
+	struct stat st;
 
 	LCONVPATHEXIST(td, args->path, &path);
 
@@ -504,6 +506,11 @@ linux_unlink(struct thread *td, struct linux_unlink_args *args)
 #endif
 
 	error = kern_unlink(td, path, UIO_SYSSPACE);
+	if (error == EPERM)
+		/* Introduce POSIX noncompliant behaviour of Linux */
+		if (kern_stat(td, path, UIO_SYSSPACE, &st) == 0)
+			if (S_ISDIR(st.st_mode))
+				error = EISDIR;
 	LFREEPATH(path);
 	return (error);
 }
-- 
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