1993-03-21 12:45:37 +03:00
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.\" Copyright (c) 1985, 1991 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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1993-07-30 12:34:38 +04:00
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.\" from: @(#)getusershell.3 6.5 (Berkeley) 4/19/91
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.\" $Id: getusershell.3,v 1.2 1993/07/30 08:36:52 mycroft Exp $
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1993-03-21 12:45:37 +03:00
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.\"
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.Dd April 19, 1991
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.Dt GETUSERSHELL 3
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.Os BSD 4.3
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.Sh NAME
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.Nm getusershell ,
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.Nm setusershell ,
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.Nm endusershell
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.Nd get legal user shells
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.Sh SYNOPSIS
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.Ft char *
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.Fn getusershell void
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.Ft void
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.Fn setusershell void
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.Ft void
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.Fn endusershell void
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.Sh DESCRIPTION
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The
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.Fn getusershell
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function
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returns a pointer to a legal user shell as defined by the
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system manager in the file
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.Pa /etc/shells .
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If
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.Pa /etc/shells
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is unreadable or does not exist,
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.Fn getusershell
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behaves as if
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.Pa /bin/sh
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and
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.Pa /bin/csh
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were listed in the file.
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.Pp
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The
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.Fn getusershell
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function
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reads the next
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line (opening the file if necessary);
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.Fn setusershell
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rewinds the file;
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.Fn endusershell
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closes it.
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.Sh FILES
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.Bl -tag -width /etc/shells -compact
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.It Pa /etc/shells
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.El
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.Sh DIAGNOSTICS
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The routine
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.Fn getusershell
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returns a null pointer (0) on
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.Dv EOF .
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.Sh SEE ALSO
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.Xr shells 5
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.Sh HISTORY
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The
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.Fn getusershell
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function appeared in
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.Bx 4.3 .
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.Sh BUGS
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The
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.Fn getusershell
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function leaves its result in an internal static object and returns
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a pointer to that object. Subsequent calls to
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.Fn getusershell
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will modify the same object.
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