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5b2abdfb A	1	.\" $NetBSD: getusershell.3,v 1.6 1999/03/22 19:44:42 garbled Exp $
	2	.\" $FreeBSD: src/lib/libc/gen/getusershell.3,v 1.10 2001/10/01 16:08:51 ru Exp $
	3	.\"
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5b2abdfb	35	.\" @(#)getusershell.3 8.1 (Berkeley) 6/4/93
e9ce8d39	36	.\"
5b2abdfb A	37	.Dd January 16, 1999
5b2abdfb A	38	.Dt GETUSERSHELL 3
e9ce8d39 A	39	.Os
e9ce8d39 A	40	.Sh NAME
5b2abdfb A	41	.Nm getusershell ,
	42	.Nm setusershell ,
	43	.Nm endusershell
	44	.Nd get valid user shells
e9ce8d39 A	45	.Sh LIBRARY
	46	.Lb libc
	47	.Sh SYNOPSIS
5b2abdfb A	48	.In unistd.h
	49	.Ft char *
	50	.Fn getusershell void
	51	.Ft void
	52	.Fn setusershell void
	53	.Ft void
	54	.Fn endusershell void
e9ce8d39 A	55	.Sh DESCRIPTION
e9ce8d39 A	56	The
5b2abdfb A	57	.Fn getusershell
	58	function
	59	returns a pointer to a valid user shell as defined by the
	60	system manager in the shells database as described in
	61	.Xr shells 5 .
	62	If the shells database is not available,
	63	.Fn getusershell
	64	behaves as if
	65	.Pa /bin/sh
e9ce8d39	66	and
5b2abdfb A	67	.Pa /bin/csh
	68	were listed.
	69	.Pp
e9ce8d39	70	The
5b2abdfb A	71	.Fn getusershell
	72	function
	73	reads the next
	74	line (opening the file if necessary);
	75	.Fn setusershell
	76	rewinds the file;
	77	.Fn endusershell
	78	closes it.
	79	.Sh FILES
	80	.Bl -tag -width /etc/shells -compact
	81	.It Pa /etc/shells
	82	.El
	83	.Sh DIAGNOSTICS
	84	The routine
	85	.Fn getusershell
	86	returns a null pointer (0) on
	87	.Dv EOF .
e9ce8d39	88	.Sh SEE ALSO
5b2abdfb	89	.Xr shells 5
e9ce8d39 A	90	.Sh HISTORY
e9ce8d39 A	91	The
5b2abdfb A	92	.Fn getusershell
	93	function appeared in
	94	.Bx 4.3 .
	95	.Sh BUGS
	96	The
	97	.Fn getusershell
	98	function leaves its result in an internal static object and returns
	99	a pointer to that object.
	100	Subsequent calls to
	101	.Fn getusershell
	102	will modify the same object.