bsd/man/man2/removexattr.2

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  23 .Dd Oct 19, 2004
  24 .Dt REMOVEXATTR 2
  25 .Os "Mac OS X"
  26 .Sh NAME
  27 .Nm removexattr,
  28 .Nm fremovexattr
  29 .Nd remove an extended attribute value
  30 .Sh SYNOPSIS
  31 .Fd #include <sys/xattr.h>
  32 .Ft int
  33 .Fn removexattr "const char *path" "const char *name" "int options"
  34 .Ft int
  35 .Fn fremovexattr "int fd" "const char *name" "int options"
  36 .Sh DESCRIPTION
  37 Extended attributes extend the basic attributes associated with files and
  38 directories in the file system.  They are stored as name:data pairs
  39 associated with file system objects (files, directories, symlinks, etc).
  40 .Pp
  41 .Fn Removexattr
  42 deletes the extended attribute
  43 .Fa name
  44 associated with
  45 .Fa path .
  46 .Pp
  47 An extended attribute's
  48 .Fa name
  49 is a simple NULL-terminated UTF-8 string.
  50 .Fa Options
  51 is a bit mask specifying various options:
  52 .Pp
  53 .Bl -tag -width XATTR_NOFOLLOW
  54 .It Dv XATTR_NOFOLLOW
  55 do not follow symbolic links.  Normally,
  56 .Fn removexattr
  57 acts on the target of
  58 .Fa path
  59 if it is a symbolic link.  With this option,
  60 .Fn removexattr
  61 will act on the link itself.
  62 .El
  63 .Pp
  64 .Fn fremovexattr
  65 is identical to
  66 .Fn removexattr ,
  67 except that it removes an extended attribute from an open file referenced
  68 by file descriptor
  69 .Fa fd .
  70 .Sh RETURN VALUES
  71 On success, 0 is returned.  On failure, -1 is returned and the global
  72 variable
  73 .Va errno
  74 is set as follows.
  75 .Sh ERRORS
  76 .Bl -tag -width Er
  77 .It Bq Er ENOATTR
  78 The specified extended attribute does not exist.
  79 .It Bq Er ENOTSUP
  80 The file system does not support extended attributes or has the feature
  81 disabled.
  82 .It Bq Er EROFS
  83 The file system is mounted read-only.
  84 .It Bq Er EPERM
  85 This type of object does not support extended attributes.
  86 .It Bq Er EINVAL
  87 .Fa name
  88 or
  89 .Fa options
  90 is invalid.
  91 .Fa name
  92 must be valid UTF-8
  93 .Fa options
  94 must make sense.
  95 .It Bq Er ENOTDIR
  96 A component of the
  97 .Fa path 's
  98 prefix is not a directory.
  99 .It Bq Er ENAMETOOLONG
 100 .Fa Name
 101 exceeded
 102 .Dv XATTR_MAXNAMELEN
 103 UTF-8 bytes, or a component of
 104 .Fa path
 105 exceeded
 106 .Dv NAME_MAX
 107 characters, or the entire
 108 .Fa path
 109 exceeded
 110 .Dv PATH_MAX
 111 characters.
 112 .It Bq Er EACCES
 113 Search permission is denied for a component
 114 .Fa path
 115 or permission to remove the attribute is denied.
 116 .It Bq Er ELOOP
 117 Too many symbolic links were encountered in
 118 .Fa path .
 119 .It Bq Er EFAULT
 120 .Fa path
 121 or
 122 .Fa name
 123 points to an invalid address.
 124 .It Bq Er EIO
 125 An I/O error occurred while reading from or writing to the file system.
 126 .El
 127 .Sh SEE ALSO
 128 .Xr getxattr 2 ,
 129 .Xr setxattr 2 ,
 130 .Xr listxattr 2
 131 .Sh HISTORY
 132 .Fn removexattr
 133 and
 134 .Fn fremovexattr
 135 first appeared in Mac OS X 10.4.