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# Simple test harness infrastructurei for BusyBox
#
# Copyright 2005 by Rob Landley
#
# License is GPLv2, see LICENSE in the busybox tarball for full license text.
# This file defines two functions, "testing" and "optional"
# and a couple more...
# The following environment variables may be set to enable optional behavior
# in "testing":
# VERBOSE - Print the diff -u of each failed test case.
# DEBUG - Enable command tracing.
# SKIP - do not perform this test (this is set by "optional")
#
# The "testing" function takes five arguments:
# $1) Test description
# $2) Command(s) to run. May have pipes, redirects, etc
# $3) Expected result on stdout
# $4) Data to be written to file "input"
# $5) Data to be written to stdin
#
# The exit value of testing is the exit value of $2 it ran.
#
# The environment variable "FAILCOUNT" contains a cumulative total of the
# number of failed tests.
# The "optional" function is used to skip certain tests, ala:
# optional FEATURE_THINGY
#
# The "optional" function checks the environment variable "OPTIONFLAGS",
# which is either empty (in which case it always clears SKIP) or
# else contains a colon-separated list of features (in which case the function
# clears SKIP if the flag was found, or sets it to 1 if the flag was not found).
export FAILCOUNT=0
export SKIP=
# Helper for helpers. Oh my...
test x"$ECHO" != x"" || {
ECHO="echo"
test x"`echo -ne`" = x"" || {
# Compile and use a replacement 'echo' which understands -e -n
ECHO="$PWD/echo-ne"
test -x "$ECHO" || {
gcc -Os -o "$ECHO" ../scripts/echo.c || exit 1
}
}
export ECHO
}
# Helper functions
optional()
{
SKIP=
while test "$1"; do
if test x"${OPTIONFLAGS/*:$1:*/y}" != x"y"; then
SKIP=1
return
fi
shift
done
}
# The testing function
testing()
{
NAME="$1"
[ -n "$1" ] || NAME="$2"
if [ $# -ne 5 ]
then
echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
exit 1
fi
[ -z "$DEBUG" ] || set -x
if [ -n "$SKIP" ]
then
echo "SKIPPED: $NAME"
return 0
fi
$ECHO -ne "$3" > expected
$ECHO -ne "$4" > input
[ -z "$VERBOSE" ] || echo "echo -ne '$5' | $2"
$ECHO -ne "$5" | eval "$2" > actual
RETVAL=$?
if cmp expected actual >/dev/null 2>/dev/null
then
echo "PASS: $NAME"
else
FAILCOUNT=$(($FAILCOUNT + 1))
echo "FAIL: $NAME"
[ -z "$VERBOSE" ] || diff -u expected actual
fi
rm -f input expected actual
[ -z "$DEBUG" ] || set +x
return $RETVAL
}
# Recursively grab an executable and all the libraries needed to run it.
# Source paths beginning with / will be copied into destpath, otherwise
# the file is assumed to already be there and only its library dependencies
# are copied.
mkchroot()
{
[ $# -lt 2 ] && return
$ECHO -n .
dest=$1
shift
for i in "$@"
do
#bashism: [ "${i:0:1}" == "/" ] || i=$(which $i)
i=$(which $i) # no-op for /bin/prog
[ -f "$dest/$i" ] && continue
if [ -e "$i" ]
then
d=`echo "$i" | grep -o '.*/'` &&
mkdir -p "$dest/$d" &&
cat "$i" > "$dest/$i" &&
chmod +x "$dest/$i"
else
echo "Not found: $i"
fi
mkchroot "$dest" $(ldd "$i" | egrep -o '/.* ')
done
}
# Set up a chroot environment and run commands within it.
# Needed commands listed on command line
# Script fed to stdin.
dochroot()
{
mkdir tmpdir4chroot
mount -t ramfs tmpdir4chroot tmpdir4chroot
mkdir -p tmpdir4chroot/{etc,sys,proc,tmp,dev}
cp -L testing.sh tmpdir4chroot
# Copy utilities from command line arguments
$ECHO -n "Setup chroot"
mkchroot tmpdir4chroot $*
echo
mknod tmpdir4chroot/dev/tty c 5 0
mknod tmpdir4chroot/dev/null c 1 3
mknod tmpdir4chroot/dev/zero c 1 5
# Copy script from stdin
cat > tmpdir4chroot/test.sh
chmod +x tmpdir4chroot/test.sh
chroot tmpdir4chroot /test.sh
umount -l tmpdir4chroot
rmdir tmpdir4chroot
}
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