.\" $OpenBSD: getusershell.3,v 1.10 2003/06/02 20:18:34 millert Exp $ .\" .\" Copyright (c) 1985, 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. 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. .\" .Dd June 4, 1993 .Dt GETUSERSHELL 3 .Os .Sh NAME .Nm getusershell , .Nm setusershell , .Nm endusershell .Nd get legal user shells .Sh SYNOPSIS .Fd #include .Ft char * .Fn getusershell void .Ft void .Fn setusershell void .Ft void .Fn endusershell void .Sh DESCRIPTION The .Fn getusershell function returns a pointer to a legal user shell as defined by the system manager in the file .Pa /etc/shells . If .Pa /etc/shells is unreadable or does not exist, .Fn getusershell behaves as if only .Pa /bin/sh and .Pa /bin/csh were listed in the file. .Pp The .Fn getusershell function reads the next line (opening the file if necessary); .Fn setusershell rewinds the file; .Fn endusershell closes it. .Sh FILES .Bl -tag -width /etc/shells -compact .It Pa /etc/shells .El .Sh DIAGNOSTICS The routine .Fn getusershell returns a null pointer .Dv EOF . .Sh SEE ALSO .Xr shells 5 .Sh HISTORY The .Fn getusershell function appeared in .Bx 4.3 . .Sh BUGS The .Fn getusershell function leaves its result in an internal static object and returns a pointer to that object. Subsequent calls to .Fn getusershell will modify the same object.