From: jvrao <jvrao@linux.vnet.ibm.com>
Subject: lsetxattr/lgetxattr on ext4.
Date: Wed, 31 Mar 2010 17:06:13 -0700
Message-ID: <4BB3E375.5010604@linux.vnet.ibm.com>
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To: linux-ext4@vger.kernel.org
Sender: linux-ext4-owner@vger.kernel.org

lsetxattr()/lgetxsttr() functions are not working on a ext4 symlink. 
But works fine on a regular file.

I tried the following program.. Not sure if I am missing something.
Any help will be appreciated.


--------- simple program -------------
[jvrao]# cat sxl.c
#include <stdio.h>
#include <sys/types.h>
#include <attr/xattr.h>

main()
{
	int ha=5;
	int ha_out=-1;
	int err;
	err = lsetxattr("./foo", "user.junk", &ha, sizeof(int),0);
	if (err == -1)
		perror("lsetxattr failed");
	lgetxattr("./foo", "user.junk", &ha_out, sizeof(int));
	if (err == -1)
		perror("lsetxattr failed");
	printf("file:./foo ha:%d  ha_out:%d\n", ha, ha_out);

	ha_out = -1;
	err = lsetxattr("./foo.sl", "user.junk", &ha, sizeof(int),0);
	if (err == -1)
		perror("lsetxattr failed");
	lgetxattr("./foo.sl", "user.junk", &ha_out, sizeof(int));
	if (err == -1)
		perror("lsetxattr failed");
	printf("file:./foo.sl  ha:%d  ha_out:%d\n", ha, ha_out);
}
------------------------

[jvrao]# ls -l foo*
-rw-r--r--. 1 root root 0 2010-03-31 16:49 foo
lrwxrwxrwx. 1 root root 3 2010-03-31 16:49 foo.sl -> foo

[jvrao]# ./sxl
file:./foo ha:5  ha_out:5
lsetxattr failed: Operation not permitted
lsetxattr failed: Operation not permitted
file:./foo.sl  ha:5  ha_out:-1