50dab48a5b
These changes add the ability to specify that a UFS file/directory cannot be unlinked. This is basically a scaled back version of the IMMUTABLE flag. The reason is to allow an administrator to create a directory hierarchy that a group of users can arbitrarily add/delete files from, but that the hierarchy itself is safe from removal by them. If the NOUNLINK definition is set to 0 then this results in no change to what happens normally. (and results in identical binary (in the kernel)). It can be proven that if this bit is never set by the admin, no new behaviour is introduced.. Several "good idea" comments from reviewers plus one grumble about creeping featurism. This code is in production in 2.2 based systems
134 lines
4.1 KiB
Groff
134 lines
4.1 KiB
Groff
.\" Copyright (c) 1989, 1990, 1993, 1994
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" 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.1 8.2 (Berkeley) 3/31/94
|
|
.\"
|
|
.Dd March 31, 1994
|
|
.Dt CHFLAGS 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm chflags
|
|
.Nd change file flags
|
|
.Sh SYNOPSIS
|
|
.Nm chflags
|
|
.Oo
|
|
.Fl R
|
|
.Op Fl H | Fl L | Fl P
|
|
.Oc
|
|
.Ar flags
|
|
.Ar file ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm chflags
|
|
utility modifies the file flags of the listed files
|
|
as specified by the
|
|
.Ar flags
|
|
operand.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width Ds
|
|
.It Fl H
|
|
If the
|
|
.Fl R
|
|
option is specified, symbolic links on the command line are followed.
|
|
(Symbolic links encountered in the tree traversal are not followed.)
|
|
.It Fl L
|
|
If the
|
|
.Fl R
|
|
option is specified, all symbolic links are followed.
|
|
.It Fl P
|
|
If the
|
|
.Fl R
|
|
option is specified, no symbolic links are followed.
|
|
.It Fl R
|
|
Change the file flags for the file hierarchies rooted
|
|
in the files instead of just the files themselves.
|
|
.El
|
|
.Pp
|
|
Flags are a comma separated list of keywords.
|
|
The following keywords are currently defined:
|
|
.Bd -literal -offset indent compact
|
|
arch set the archived flag (super-user only)
|
|
dump set the dump flag
|
|
sappnd set the system append-only flag (super-user only)
|
|
schg set the system immutable flag (super-user only)
|
|
sunlnk set the system undeletable flag (super-user only)
|
|
uappnd set the user append-only flag (owner or super-user only)
|
|
uchg set the user immutable flag (owner or super-user only)
|
|
uunlnk set the user undeletable flag (owner or super-user only)
|
|
archived, sappend, schange, simmutable, uappend, uchange, uimmutable,
|
|
sunlink, uunlink
|
|
aliases for the above
|
|
.Ed
|
|
.Pp
|
|
Putting the letters
|
|
.Dq no
|
|
before an option causes the flag to be turned off.
|
|
For example:
|
|
.Bd -literal -offset indent compact
|
|
nodump the file should never be dumped
|
|
.Ed
|
|
.Pp
|
|
Symbolic links do not have flags, so unless the
|
|
.Fl H
|
|
or
|
|
.Fl L
|
|
option is set,
|
|
.Nm chflags
|
|
on a symbolic link always succeeds and has no effect.
|
|
The
|
|
.Fl H ,
|
|
.Fl L
|
|
and
|
|
.Fl P
|
|
options are ignored unless the
|
|
.Fl R
|
|
option is specified.
|
|
In addition, these options override each other and the
|
|
command's actions are determined by the last one specified.
|
|
.Pp
|
|
The
|
|
.Nm chflags
|
|
utility exits 0 on success, and >0 if an error occurs.
|
|
.Sh SEE ALSO
|
|
.Xr chflags 2 ,
|
|
.Xr stat 2 ,
|
|
.Xr fts 3 ,
|
|
.Xr symlink 7
|
|
.Sh HISTORY
|
|
The
|
|
.Nm chflags
|
|
command first appeared in
|
|
.Bx 4.4 .
|