freebsd-skq/lib/libc/gen/strtofflags.3
joe f1a9497df5 Historically file flags (schg, uschg, etc) have been converted from
string to u_long and back using two functions, flags_to_string and
string_to_flags, which co-existed with 'ls'.  As time has progressed
more and more other tools have used these private functions to
manipulate the file flags.

Recently I moved these functions from /usr/src/bin/ls to libutil,
but after some discussion with bde it's been decided that they
really ought to go in libc.

There are two already existing libc functions for manipulating file
modes:  setmode and getmode.  In keeping with these flags_to_string
has been renamed getflags and string_to_flags to setflags.

The manual page could probably be improved upon ;)
2000-01-27 21:17:01 +00:00

79 lines
2.8 KiB
Groff

.\" Copyright (c) 1989, 1991, 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.
.\"
.\" @(#)setmode.3 8.2 (Berkeley) 4/28/95
.\" $FreeBSD$
.\"
.Dd January 1, 2000
.Dt SETFLAGS 3
.Os
.Sh NAME
.Nm getflags ,
.Nm setflags
.Nd modify file flag bits
.Sh SYNOPSIS
.Fd #include <unistd.h>
.Ft char *
.Fn getflags "u_long flags" "char *def"
.Ft int
.Fn setflags "char **stringp" "u_long *setp" "u_long *clrp"
.Sh DESCRIPTION
The
.Fn getflags
function returns a comma separated string of the file flags represented by
.Fa flags .
If no flags are set the string
.Fa def
is returned instead.
.Pp
The
.Fn setflags
function takes a string of file flags, as described in
.Xr chflags 1 ,
parses it, and returns the 'set' flags and 'clear' flags
such as would be given as arguments to
.Xr chflags 2 .
On success
.Fn setflags
returns 0, otherwise it returns non-zero and
.Fa stringp
is left pointing to the offending token.
.Sh SEE ALSO
.Xr chflags 1 ,
.Xr chflags 2 ,
.Sh HISTORY
The
.Fn getflags
and
.Fn setflags
functions first appeared in
.Fx 4.0 .