xattr_supported(3) [php man page]

XATTR_SUPPORTED(3)							 1							XATTR_SUPPORTED(3)

xattr_supported - Check if filesystem supports extended attributes

SYNOPSIS

       bool xattr_supported (string  $filename, [int  $flags])

DESCRIPTION

	This functions checks if the filesystem holding the given file supports extended attributes. Read access to the file is required.

PARAMETERS

	      o $filename
		- The path of the tested file.

	      o $flags
		-

	      Supported xattr flags

	      +-----------------+---------------------------------------------------+
	      | 		|						    |
	      |XATTR_DONTFOLLOW |						    |
	      | 		|						    |
	      | 		| Do  not  follow  the symbolic link but operate on |
	      | 		| symbolic link itself. 			    |
	      | 		|						    |
	      +-----------------+---------------------------------------------------+
RETURN VALUES

	This function returns TRUE if filesystem supports extended attributes, FALSE if it doesn't and NULL if it can't be determined (for example
       wrong path or lack of permissions to file).

EXAMPLES

       Example #1

	      xattr_supported(3) example

	       The following code checks if we can use extended attributes.

	      <?php
	      $file = 'some_file';

	      if (xattr_supported($file)) {
		  /* ... make use of some xattr_* functions ... */
	      }

	      ?>

SEE ALSO

       xattr_get(3), xattr_list(3).

PHP Documentation Group 													XATTR_SUPPORTED(3)

REMOVEXATTR(2)						     Linux Programmer's Manual						    REMOVEXATTR(2)

NAME

       removexattr, lremovexattr, fremovexattr - remove an extended attribute

SYNOPSIS

       #include <sys/types.h>
       #include <sys/xattr.h>

       int removexattr(const char *path, const char *name);
       int lremovexattr(const char *path, const char *name);
       int fremovexattr(int fd, const char *name);

DESCRIPTION

       Extended  attributes  are  name:value  pairs associated with inodes (files, directories, symbolic links, etc.).	They are extensions to the
       normal attributes which are associated with all inodes in the system (i.e., the stat(2) data).  A complete overview of extended	attributes
       concepts can be found in attr(5).

       removexattr() removes the extended attribute identified by name and associated with the given path in the filesystem.

       lremovexattr()  is identical to removexattr(), except in the case of a symbolic link, where the extended attribute is removed from the link
       itself, not the file that it refers to.

       fremovexattr() is identical to removexattr(), only the extended attribute is removed from the open file referred to by fd (as  returned	by
       open(2)) in place of path.

       An  extended  attribute	name is a null-terminated string.  The name includes a namespace prefix; there may be several, disjoint namespaces
       associated with an individual inode.

RETURN VALUE

       On success, zero is returned.  On failure, -1 is returned and errno is set appropriately.

ERRORS

       ENOATTR
	      The named attribute does not exist.  (ENOATTR is defined to be a synonym for ENODATA in <attr/xattr.h>.)

       ENOTSUP
	      Extended attributes are not supported by the filesystem, or are disabled.

       In addition, the errors documented in stat(2) can also occur.

VERSIONS

       These system calls have been available on Linux since kernel 2.4; glibc support is provided since version 2.3.

CONFORMING TO

       These system calls are Linux-specific.

SEE ALSO

       getfattr(1), setfattr(1), getxattr(2), listxattr(2), open(2), setxattr(2), stat(2), attr(5), symlink(7)

Linux								    2014-02-06							    REMOVEXATTR(2)