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.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
.\" 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.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 September 27, 2014
.Dt ATF-SH 1
.Os
.Sh NAME
.Nm atf-sh
.Op Fl s Ar shell
.Nd interpreter for shell-based test programs
.Sh SYNOPSIS
.Nm
.Ar script
.Sh DESCRIPTION
.Nm
is an interpreter that runs the test program given in
.Ar script
after loading the
.Xr atf-sh 3
library.
.Pp
.Nm
is not a real interpreter though: it is just a wrapper around
the system-wide shell defined by
.Va ATF_SHELL .
.Nm
executes the interpreter, loads the
.Xr atf-sh 3
library and then runs the script.
You must consider
.Nm atf-sh
to be a POSIX shell by default and thus should not use any non-standard
extensions.
.Pp
The following options are available:
.Bl -tag -width XsXshellXXX
.It Fl s Ar shell
Specifies the shell to use instead of the value provided by
.Va ATF_SHELL .
.El
.Sh ENVIRONMENT
.Bl -tag -width ATFXLIBEXECDIRXX -compact
.It Va ATF_LIBEXECDIR
Overrides the builtin directory where
.Nm
is located.
Should not be overridden other than for testing purposes.
.It Va ATF_PKGDATADIR
Overrides the builtin directory where
.Pa libatf-sh.subr
is located.
Should not be overridden other than for testing purposes.
.It Va ATF_SHELL
Path to the system shell to be used in the generated scripts.
Scripts must not rely on this variable being set to select a specific
interpreter.
.El
.Sh EXAMPLES
Scripts using
.Xr atf-sh 3
should start with:
.Bd -literal -offset indent
#! /usr/bin/env atf-sh
.Ed
.Pp
Alternatively, if you want to explicitly choose a shell interpreter, you cannot
rely on
.Xr env 1
to find
.Nm .
Instead, you have to hardcode the path to
.Nm
in the script and then use the
.Fl s
option afterwards as a
.Em single parameter :
.Bd -literal -offset indent
#! /path/to/bin/atf-sh -s/bin/bash
.Ed
.Sh SEE ALSO
.Xr atf-sh 3
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