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Special Forums News, Links, Events and Announcements Software Releases - RSS News pxattr 1.0.5 (Default branch)
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Old 01-27-2009
pxattr 1.0.5 (Default branch)
Linux, FreeBSD, and Mac OS X all provide similar extended file attributes functionality, with significantly different interfaces. The pxattr package aims at providing a single extended file attributes interface on all three systems (and others in the future). It consists of a single C++ module to be included in the application source code. The C++ file can also be compiled to a command line attributes management command and test tool. License: MIT/X Consortium License Changes:
Portability to recent Linux systems: the system interface include file name has been changed from attr/xattr.h to sys/xattr.h. Image

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removexattr

REMOVEXATTR(2)						      BSD System Calls Manual						    REMOVEXATTR(2)

NAME

     removexattr, fremovexattr -- remove an extended attribute value

SYNOPSIS

     #include <sys/xattr.h>

     int
     removexattr(const char *path, const char *name, int options);

     int
     fremovexattr(int fd, const char *name, int options);

DESCRIPTION

     Extended attributes extend the basic attributes associated with files and directories in the file system.	They are stored as name:data pairs
     associated with file system objects (files, directories, symlinks, etc).

     removexattr() deletes the extended attribute name associated with path.

     An extended attribute's name is a simple NULL-terminated UTF-8 string.  Options is a bit mask specifying various options:

     XATTR_NOFOLLOW  do not follow symbolic links.  Normally, removexattr() acts on the target of path if it is a symbolic link.  With this
		     option, removexattr() will act on the link itself.

     XATTR_SHOWCOMPRESSION
		     removexattr() and fremovexattr() will remove HFS Plus Compression extended attribute name (if present) for the file referred
		     to by path or fd.

     fremovexattr() is identical to removexattr(), except that it removes an extended attribute from an open file referenced by file descriptor
     fd.

RETURN VALUES

     On success, 0 is returned.  On failure, -1 is returned and the global variable errno is set as follows.

ERRORS

     [ENOATTR]		The specified extended attribute does not exist.

     [ENOTSUP]		The file system does not support extended attributes or has the feature disabled.

     [EROFS]		The file system is mounted read-only.

     [EPERM]		This type of object does not support extended attributes.

     [EINVAL]		name or options is invalid.  name must be valid UTF-8 options must make sense.

     [ENOTDIR]		A component of the path 's prefix is not a directory.

     [ENAMETOOLONG]	Name exceeded XATTR_MAXNAMELEN UTF-8 bytes, or a component of path exceeded NAME_MAX characters, or the entire path
			exceeded PATH_MAX characters.

     [EACCES]		Search permission is denied for a component path or permission to remove the attribute is denied.

     [ELOOP]		Too many symbolic links were encountered in path.

     [EFAULT]		path or name points to an invalid address.

     [EIO]		An I/O error occurred while reading from or writing to the file system.

SEE ALSO

     getxattr(2), listxattr(2), setxattr(2)

HISTORY

     removexattr() and fremovexattr() first appeared in Mac OS X 10.4.

Mac OS X							   Oct 19, 2004 							  Mac OS X