Provided by: libattr1-dev_2.4.39-1_i386 bug


       listxattr, llistxattr, flistxattr - list extended attribute names


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

       ssize_t listxattr (const char *path,
                            char *list, size_t size);
       ssize_t llistxattr (const char *path,
                            char *list, size_t size);
       ssize_t flistxattr (int filedes,
                            char *list, size_t size);


       Extended attributes are name:value pairs associated with inodes (files,
       directories,  symlinks,  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).

       listxattr  retrieves  the  list  of extended attribute names associated
       with the given path in the filesystem.  The list is the set  of  (NULL-
       terminated)  names,  one after the other.  Names of extended attributes
       to which the calling process does not have access may be  omitted  from
       the list.  The length of the attribute name list is returned.

       llistxattr  is identical to listxattr, except in the case of a symbolic
       link, where the list of names of extended  attributes  associated  with
       the link itself is retrieved, not the file that it refers to.

       flistxattr  is identical to listxattr, only the open file pointed to by
       filedes (as returned by open(2)) is interrogated in place of path.

       A single extended attribute name is a  simple  NULL-terminated  string.
       The  name  includes a namespace prefix - there may be several, disjoint
       namespaces associated with an individual inode.

       An empty buffer of size zero can be passed into these calls  to  return
       the  current size of the list of extended attribute names, which can be
       used to estimate the size of a buffer which is  sufficiently  large  to
       hold the list of names.


       The  list of names is returned as an unordered array of NULL-terminated
       character strings (attribute names are separated by  NULL  characters),
       like this:

       Filesystems  like  ext2,  ext3 and XFS which implement POSIX ACLs using
       extended attributes, might return a list like this:


       On success, a positive number is returned indicating the  size  of  the
       extended  attribute name list.  On failure, -1 is returned and errno is
       set appropriately.

       If the size of the list buffer is too small to hold the  result,  errno
       is set to ERANGE.

       If  extended  attributes  are  not  supported by the filesystem, or are
       disabled, errno is set to ENOTSUP.

       The errors documented for the stat(2) system call are  also  applicable


       Andreas   Gruenbacher,  <>  and  the  SGI  XFS
       development team, <>.  Please send any bug reports
       or comments to these addresses.


       getfattr(1),  setfattr(1),  open(2), stat(2), getxattr(2), setxattr(2),
       removexattr(2), and attr(5).