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-.\" 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. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. 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 fchflags
-.Nd set file flags
-.Sh SYNOPSIS
-.Fd #include <sys/stat.h>
-.Fd #include <unistd.h>
-.Ft int
-.Fn chflags "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 .
-.Pp
-The flags specified are formed by
-.Em or Ns 'ing
-the following values
-.Pp
-.Bl -tag -width "SF_IMMUTABLE" -compact -offset indent
-.It UF_NODUMP
-Do not dump the file.
-.It UF_IMMUTABLE
-The file may not be changed.
-.It UF_APPEND
-The file may only be appended to.
-.It UF_NOUNLINK
-The file may not be renamed or deleted.
-.It UF_OPAQUE
-The directory is opaque when viewed through a union stack.
-.\".It ARCHIVED
-.\"File is archived.
-.It SF_IMMUTABLE
-The file may not be changed.
-.It SF_APPEND
-The file may only be appended to.
-.It SF_NOUNLINK
-The file may not be renamed or deleted.
-.El
-.Pp
-The
-.Dq UF_IMMUTABLE
-,
-.Dq UF_APPEND
-and
-.Dq UF_NOUNLINK
-flags may be set or unset by either the owner of a file or the super-user.
-.Pp
-The
-.Dq SF_IMMUTABLE
-,
-.Dq SF_APPEND
-and
-.Dq SF_NOUNLINK
-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 255 characters,
-or an entire path name exceeded 1023 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.
-.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.
-.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 init 8 ,
-.Xr mount_union 8
-.Sh HISTORY
-The
-.Nm chflags
-and
-.Nm fchflags
-functions first appeared in
-.Bx 4.4 .
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