The following is a proposed start for a command library that can be
used by all bourne shell scripts for executing bourne shell based
scripts / testcases, as there is a large degree of duplication in
testcases/network/{ipv6,tcp_cmds}/*, and there's no doubt a large
degree elsewhere.
The other driving motivator for this is that it would force folks to
adhere to a set standard for shell scripts, and would provide a common
set of simple routines for tracking whether or not prerequisites
exist, as well as whether or not to cleanup, report failure, find
commands, etc.
I will employ this logic in the testcases/network/{ipv6,tcp_cmds}/*
scripts, but I would really like some feedback as to whether or not
what I have is a good idea, or if I could stand more, or less
information, or whether or not this could be done in a better way...
Thanks.
(No sign-off included here because it's not in final form, yet -- will
sign off in my CVS branch space though)
#!/bin/sh
#
# Command library that provides a boilerplate set of functions and variables
# required for all bourne shell based scripts.
#
# Copyright (C) 2009, Cisco Systems Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Garrett Cooper, August 2009
#
set -u
export SHELL_DEBUG=${SHELL_DEBUG:=0}
if [ "$SHELL_DEBUG" = 1 ] ; then
set -x
fi
#=============================================================================
# FUNCTION NAME: cleanup
#
# FUNCTION DESCRIPTION: Clean up after a testcase.
#
# PARAMETERS: None.
#
# RETURNS: None.
#=============================================================================
cleanup()
{
# To ensure set -u passes...
TCtmp=${TCtmp:=}
tst_resm TINFO "Cleaning up."
# Nuke the testcase temporary directory if it exists.
[ -d "$TCtmp" ] && rm -rf "$TCtmp"
}
#=============================================================================
# FUNCTION NAME: end_testcase
#
# FUNCTION DESCRIPTION: Print out whether or not a test failed. Do not use
# this when TBROK messages should be applied.
#
# PARAMETERS: Failure message, or "" / unset if passed.
#
# RETURNS: None.
#=============================================================================
end_testcase()
{
cleanup
if [ $# -eq 0 ]; then
tst_resm TPASS "Test successful"
else
tst_resm TBROK "Test broken: $*"
exit 1
fi
}
#-----------------------------------------------------------------------
#
# FUNCTION: exists
# PURPOSE: Check if command(s) used by this test script exist.
#
#-----------------------------------------------------------------------
exists()
{
for cmd in $@; do
if ! which $cmd 2>&1 1>/dev/null; then
end_testcase "$cmd: command not found"
exit 1
fi
done
}
#-----------------------------------------------------------------------
#
# FUNCTION: setup
# PURPOSE: Setup the test environment.
#
#-----------------------------------------------------------------------
setup() {
#
# $0 is maintained by the caller script; tested on FreeBSD (ash) and
# Gentoo GNU/Linux (bash) --
#
# foo.sh:
# echo ${0##*/}
# . ${$0%%*}/bar.sh
# bar.sh:
# echo ${0##*/}
# echo $SHELL
#
# Gentoo:
# gcoo...@orangebox ~/Desktop $ ./foo.sh
# foo.sh
# foo.sh
# /bin/bash
# gcoo...@orangebox ~/Desktop $ uname -sr
# Linux 2.6.29-gentoo-r5
#
# $ ./foo.sh
# foo.sh
# foo.sh
# /bin/sh
# $ uname -sr
# FreeBSD 8.0-BETA2
#
TCID=${TCID:=}
[ -z "$TCID" ] && TCID=${0##*/}
export TCID
for varname in TST_COUNT TST_TOTAL; do
if ! eval "test -z \"\$${varname}\""; then
end_testcase "You must set ${varname} before calling setup()."
fi
done
LTPROOT=${LTPROOT:="../../../../"}
TEMPDIR=${TEMPDIR:=/tmp}
TCtmp=${TCtmp:=$TEMPDIR/$TC$$}
# User wants a temporary sandbox to play with.
if [ -n "$TCtmp" ] ; then
test -d "$TCtmp" || mkdir -p "$TCtmp"
# Clean up on exit.
trap cleanup EXIT
fi
fi
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