man2/removexattr.2

   1 .\" Copyright (C) Andreas Gruenbacher, February 2001
   2 .\" Copyright (C) Silicon Graphics Inc, September 2001
   3 .\"
   4 .\" SPDX-License-Identifier: GPL-2.0-or-later
   5 .\"
   6 .TH REMOVEXATTR 2 2021-03-22 "Linux man-pages (unreleased)" "Linux Programmer's Manual"
   7 .SH NAME
   8 removexattr, lremovexattr, fremovexattr \- remove an extended attribute
   9 .SH LIBRARY
  10 Standard C library
  11 .RI ( libc ", " \-lc )
  12 .SH SYNOPSIS
  13 .nf
  14 .B #include <sys/xattr.h>
  15 .PP
  16 .BI "int removexattr(const char\ *" path ", const char\ *" name );
  17 .BI "int lremovexattr(const char\ *" path ", const char\ *" name );
  18 .BI "int fremovexattr(int " fd ", const char\ *" name );
  19 .fi
  20 .SH DESCRIPTION
  21 Extended attributes are
  22 .IR name : value
  23 pairs associated with inodes (files, directories, symbolic links, etc.).
  24 They are extensions to the normal attributes which are associated
  25 with all inodes in the system (i.e., the
  26 .BR stat (2)
  27 data).
  28 A complete overview of extended attributes concepts can be found in
  29 .BR xattr (7).
  30 .PP
  31 .BR removexattr ()
  32 removes the extended attribute identified by
  33 .I name
  34 and associated with the given
  35 .I path
  36 in the filesystem.
  37 .PP
  38 .BR lremovexattr ()
  39 is identical to
  40 .BR removexattr (),
  41 except in the case of a symbolic link, where the extended attribute is
  42 removed from the link itself, not the file that it refers to.
  43 .PP
  44 .BR fremovexattr ()
  45 is identical to
  46 .BR removexattr (),
  47 only the extended attribute is removed from the open file referred to by
  48 .I fd
  49 (as returned by
  50 .BR open (2))
  51 in place of
  52 .IR path .
  53 .PP
  54 An extended attribute name is a null-terminated string.
  55 The
  56 .I name
  57 includes a namespace prefix; there may be several, disjoint
  58 namespaces associated with an individual inode.
  59 .SH RETURN VALUE
  60 On success, zero is returned.
  61 On failure, \-1 is returned and
  62 .I errno
  63 is set to indicate the error.
  64 .SH ERRORS
  65 .TP
  66 .B ENODATA
  67 The named attribute does not exist.
  68 .\" .RB ( ENOATTR
  69 .\" is defined to be a synonym for
  70 .\" .BR ENODATA
  71 .\" in
  72 .\" .IR <attr/attributes.h> .)
  73 .TP
  74 .B ENOTSUP
  75 Extended attributes are not supported by the filesystem, or are disabled.
  76 .PP
  77 In addition, the errors documented in
  78 .BR stat (2)
  79 can also occur.
  80 .SH VERSIONS
  81 These system calls have been available on Linux since kernel 2.4;
  82 glibc support is provided since version 2.3.
  83 .SH STANDARDS
  84 These system calls are Linux-specific.
  85 .\" .SH AUTHORS
  86 .\" Andreas Gruenbacher,
  87 .\" .RI < a.gruenbacher@computer.org >
  88 .\" and the SGI XFS development team,
  89 .\" .RI < linux-xfs@oss.sgi.com >.
  90 .\" Please send any bug reports or comments to these addresses.
  91 .SH SEE ALSO
  92 .BR getfattr (1),
  93 .BR setfattr (1),
  94 .BR getxattr (2),
  95 .BR listxattr (2),
  96 .BR open (2),
  97 .BR setxattr (2),
  98 .BR stat (2),
  99 .BR symlink (7),
 100 .BR xattr (7)