188 lines
5.3 KiB
Groff
188 lines
5.3 KiB
Groff
|
.\" $NetBSD: chflags.2,v 1.26 2010/05/31 12:16:20 njoly Exp $
|
||
|
.\"
|
||
|
.\" Copyright (c) 1989, 1993
|
||
|
.\" The Regents of the University of California. All rights reserved.
|
||
|
.\"
|
||
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
.\" modification, are permitted provided that the following conditions
|
||
|
.\" are met:
|
||
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
.\" 3. Neither the name of the University nor the names of its contributors
|
||
|
.\" may be used to endorse or promote products derived from this software
|
||
|
.\" without specific prior written permission.
|
||
|
.\"
|
||
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
.\" SUCH DAMAGE.
|
||
|
.\"
|
||
|
.\" @(#)chflags.2 8.3 (Berkeley) 5/2/95
|
||
|
.\"
|
||
|
.Dd May 2, 1995
|
||
|
.Dt CHFLAGS 2
|
||
|
.Os
|
||
|
.Sh NAME
|
||
|
.Nm chflags ,
|
||
|
.Nm lchflags ,
|
||
|
.Nm fchflags
|
||
|
.Nd set file flags
|
||
|
.Sh LIBRARY
|
||
|
.Lb libc
|
||
|
.Sh SYNOPSIS
|
||
|
.In sys/stat.h
|
||
|
.In unistd.h
|
||
|
.Ft int
|
||
|
.Fn chflags "const char *path" "u_long flags"
|
||
|
.Ft int
|
||
|
.Fn lchflags "const char *path" "u_long flags"
|
||
|
.Ft int
|
||
|
.Fn fchflags "int fd" "u_long flags"
|
||
|
.Sh DESCRIPTION
|
||
|
The file whose name
|
||
|
is given by
|
||
|
.Fa path
|
||
|
or referenced by the descriptor
|
||
|
.Fa fd
|
||
|
has its flags changed to
|
||
|
.Fa flags .
|
||
|
For
|
||
|
.Fn lchflags ,
|
||
|
symbolic links are not traversed and thus their modes may be changed with
|
||
|
this call.
|
||
|
.Pp
|
||
|
The flags specified are formed by
|
||
|
.Em or Ns 'ing
|
||
|
the following values:
|
||
|
.Pp
|
||
|
.Bl -tag -width "SF_IMMUTABLE" -compact -offset indent
|
||
|
.It Dv UF_NODUMP
|
||
|
Do not dump the file.
|
||
|
.It Dv UF_IMMUTABLE
|
||
|
The file may not be changed.
|
||
|
.It Dv UF_APPEND
|
||
|
The file may only be appended to.
|
||
|
.It Dv UF_OPAQUE
|
||
|
The file (if a directory) is opaque for union mounts.
|
||
|
.It Dv SF_ARCHIVED
|
||
|
The file is archived.
|
||
|
.It Dv SF_IMMUTABLE
|
||
|
The file may not be changed.
|
||
|
.It Dv SF_APPEND
|
||
|
The file may only be appended to.
|
||
|
.El
|
||
|
.Pp
|
||
|
The
|
||
|
.Dv UF_NODUMP ,
|
||
|
.Dv UF_IMMUTABLE ,
|
||
|
.Dv UF_APPEND ,
|
||
|
and
|
||
|
.Dv UF_OPAQUE
|
||
|
flags may be set or unset by either the owner of a file or the super-user,
|
||
|
except on block and character devices, where only the super-user may set
|
||
|
or unset them.
|
||
|
.Pp
|
||
|
The
|
||
|
.Dv SF_ARCHIVED ,
|
||
|
.Dv SF_IMMUTABLE ,
|
||
|
and
|
||
|
.Dv SF_APPEND
|
||
|
flags may only be set or unset by the super-user.
|
||
|
Attempts by the non-super-user to set the super-user only flags
|
||
|
are silently ignored.
|
||
|
These flags may be set at any time, but normally may only be unset when
|
||
|
the system is in single-user mode.
|
||
|
(See
|
||
|
.Xr init 8
|
||
|
for details.)
|
||
|
.Sh RETURN VALUES
|
||
|
Upon successful completion, a value of 0 is returned.
|
||
|
Otherwise, \-1 is returned and the global variable
|
||
|
.Va errno
|
||
|
is set to indicate the error.
|
||
|
.Sh ERRORS
|
||
|
.Fn chflags
|
||
|
will fail if:
|
||
|
.Bl -tag -width Er
|
||
|
.It Bq Er ENOTDIR
|
||
|
A component of the path prefix is not a directory.
|
||
|
.It Bq Er ENAMETOOLONG
|
||
|
A component of a pathname exceeded
|
||
|
.Brq Dv NAME_MAX
|
||
|
characters, or an entire path name exceeded
|
||
|
.Brq Dv PATH_MAX
|
||
|
characters.
|
||
|
.It Bq Er ENOENT
|
||
|
The named file does not exist.
|
||
|
.It Bq Er EACCES
|
||
|
Search permission is denied for a component of the path prefix.
|
||
|
.It Bq Er ELOOP
|
||
|
Too many symbolic links were encountered in translating the pathname.
|
||
|
.It Bq Er EPERM
|
||
|
The effective user ID does not match the owner of the file and
|
||
|
the effective user ID is not the super-user, or
|
||
|
the effective user ID is not the super-user and one or more of the
|
||
|
super-user-only flags for the named file would be changed.
|
||
|
.It Bq Er EOPNOTSUPP
|
||
|
The named file resides on a file system that does not support file
|
||
|
flags.
|
||
|
.It Bq Er EROFS
|
||
|
The named file resides on a read-only file system.
|
||
|
.It Bq Er EFAULT
|
||
|
.Fa path
|
||
|
points outside the process's allocated address space.
|
||
|
.It Bq Er EIO
|
||
|
An
|
||
|
.Tn I/O
|
||
|
error occurred while reading from or writing to the file system.
|
||
|
.El
|
||
|
.Pp
|
||
|
.Fn fchflags
|
||
|
will fail if:
|
||
|
.Bl -tag -width Er
|
||
|
.It Bq Er EBADF
|
||
|
The descriptor is not valid.
|
||
|
.It Bq Er EINVAL
|
||
|
.Fa fd
|
||
|
refers to a socket, not to a file.
|
||
|
.It Bq Er EPERM
|
||
|
The effective user ID does not match the owner of the file and
|
||
|
the effective user ID is not the super-user, or
|
||
|
the effective user ID is not the super-user and one or more of the
|
||
|
super-user-only flags for the file would be changed.
|
||
|
.It Bq Er EOPNOTSUPP
|
||
|
The file resides on a file system that does not support file flags.
|
||
|
.It Bq Er EROFS
|
||
|
The file resides on a read-only file system.
|
||
|
.It Bq Er EIO
|
||
|
An
|
||
|
.Tn I/O
|
||
|
error occurred while reading from or writing to the file system.
|
||
|
.El
|
||
|
.Sh SEE ALSO
|
||
|
.Xr chflags 1 ,
|
||
|
.Xr stat 2 ,
|
||
|
.Xr init 8 ,
|
||
|
.Xr mount_union 8
|
||
|
.Sh HISTORY
|
||
|
The
|
||
|
.Fn chflags
|
||
|
and
|
||
|
.Fn fchflags
|
||
|
functions first appeared in
|
||
|
.Bx 4.4 .
|
||
|
The
|
||
|
.Fn lchflags
|
||
|
function first appeared in
|
||
|
.Nx 1.5 .
|