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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 "optionflag"
+
+# 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 "optionflag")
+#
+# The "testing" function takes five arguments:
+# $1) Description to display when running command
+# $2) Command line arguments to command
+# $3) Expected result (on stdout)
+# $4) Data written to file "input"
+# $5) Data written to stdin
+#
+# The exit value of testing is the exit value of the command it ran.
+#
+# The environment variable "FAILCOUNT" contains a cumulative total of the
+# number of failed tests.
+
+# The "optional" function is used to skip certain tests, ala:
+# optionflag CONFIG_FEATURE_THINGY
+#
+# The "optional" function checks the environment variable "OPTIONFLAGS",
+# which is either empty (in which case it always clears SKIP) or
+# else contains a colon-separated list of features (in which case the function
+# clears SKIP if the flag was found, or sets it to 1 if the flag was not found).
+
+export FAILCOUNT=0
+export SKIP=
+
+# Helper functions
+
+optional()
+{
+ option=`echo "$OPTIONFLAGS" | egrep "(^|:)$1(:|\$)"`
+ # Not set?
+ if [ -z "$1" ] || [ -z "$OPTIONFLAGS" ] || [ ${#option} -ne 0 ]
+ then
+ SKIP=""
+ return
+ fi
+ SKIP=1
+}
+
+# The testing function
+
+testing ()
+{
+ NAME="$1"
+ [ -z "$1" ] && NAME=$2
+
+ if [ $# -ne 5 ]
+ then
+ echo "Test $NAME has the wrong number of arguments ($# $*)" >&2
+ exit
+ fi
+
+ [ -n "$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 '$5' | $2"
+ echo -ne "$5" | eval "$2" > actual
+ RETVAL=$?
+
+ cmp expected actual > /dev/null
+ if [ $? -ne 0 ]
+ then
+ FAILCOUNT=$[$FAILCOUNT+1]
+ echo "FAIL: $NAME"
+ [ -n "$VERBOSE" ] && diff -u expected actual
+ else
+ echo "PASS: $NAME"
+ fi
+ rm -f input expected actual
+
+ [ -n "$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.
+
+function mkchroot
+{
+ [ $# -lt 2 ] && return
+
+ echo -n .
+
+ dest=$1
+ shift
+ for i in "$@"
+ do
+ [ "${i:0:1}" == "/" ] || i=$(which $i)
+ [ -f "$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.
+
+function 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
+}
+