1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3#
4# Runs a set of tests in a given subdirectory.
5export skip_rc=4
6export timeout_rc=124
7export logfile=/dev/stdout
8export per_test_logging=
9
10# Defaults for "settings" file fields:
11# "timeout" how many seconds to let each test run before running
12# over our soft timeout limit.
13export kselftest_default_timeout=45
14
15# There isn't a shell-agnostic way to find the path of a sourced file,
16# so we must rely on BASE_DIR being set to find other tools.
17if [ -z "$BASE_DIR" ]; then
18	echo "Error: BASE_DIR must be set before sourcing." >&2
19	exit 1
20fi
21
22TR_CMD=$(command -v tr)
23
24# If Perl is unavailable, we must fall back to line-at-a-time prefixing
25# with sed instead of unbuffered output.
26tap_prefix()
27{
28	if [ ! -x /usr/bin/perl ]; then
29		sed -e 's/^/# /'
30	else
31		"$BASE_DIR"/kselftest/prefix.pl
32	fi
33}
34
35tap_timeout()
36{
37	# Make sure tests will time out if utility is available.
38	if [ -x /usr/bin/timeout ] ; then
39		/usr/bin/timeout --foreground "$kselftest_timeout" $1
40	else
41		$1
42	fi
43}
44
45run_one()
46{
47	DIR="$1"
48	TEST="$2"
49	NUM="$3"
50
51	BASENAME_TEST=$(basename $TEST)
52
53	# Reset any "settings"-file variables.
54	export kselftest_timeout="$kselftest_default_timeout"
55
56	# Safe default if tr not available
57	kselftest_cmd_args_ref="KSELFTEST_ARGS"
58
59	# Optional arguments for this command, possibly defined as an
60	# environment variable built using the test executable in all
61	# uppercase and sanitized substituting non acceptable shell
62	# variable name characters with "_" as in:
63	#
64	# 	KSELFTEST_<UPPERCASE_SANITIZED_TESTNAME>_ARGS="<options>"
65	#
66	# e.g.
67	#
68	# 	rtctest --> KSELFTEST_RTCTEST_ARGS="/dev/rtc1"
69	#
70	# 	cpu-on-off-test.sh --> KSELFTEST_CPU_ON_OFF_TEST_SH_ARGS="-a -p 10"
71	#
72	if [ -n "$TR_CMD" ]; then
73		BASENAME_SANITIZED=$(echo "$BASENAME_TEST" | \
74					$TR_CMD -d "[:blank:][:cntrl:]" | \
75					$TR_CMD -c "[:alnum:]_" "_" | \
76					$TR_CMD [:lower:] [:upper:])
77		kselftest_cmd_args_ref="KSELFTEST_${BASENAME_SANITIZED}_ARGS"
78	fi
79
80	# Load per-test-directory kselftest "settings" file.
81	settings="$BASE_DIR/$DIR/settings"
82	if [ -r "$settings" ] ; then
83		while read line ; do
84			# Skip comments.
85			if echo "$line" | grep -q '^#'; then
86				continue
87			fi
88			field=$(echo "$line" | cut -d= -f1)
89			value=$(echo "$line" | cut -d= -f2-)
90			eval "kselftest_$field"="$value"
91		done < "$settings"
92	fi
93
94	# Command line timeout overrides the settings file
95	if [ -n "$kselftest_override_timeout" ]; then
96		kselftest_timeout="$kselftest_override_timeout"
97		echo "# overriding timeout to $kselftest_timeout" >> "$logfile"
98	else
99		echo "# timeout set to $kselftest_timeout" >> "$logfile"
100	fi
101
102	TEST_HDR_MSG="selftests: $DIR: $BASENAME_TEST"
103	echo "# $TEST_HDR_MSG"
104	if [ ! -e "$TEST" ]; then
105		echo "# Warning: file $TEST is missing!"
106		echo "not ok $test_num $TEST_HDR_MSG"
107	else
108		if [ -x /usr/bin/stdbuf ]; then
109			stdbuf="/usr/bin/stdbuf --output=L "
110		fi
111		eval kselftest_cmd_args="\$${kselftest_cmd_args_ref:-}"
112		cmd="$stdbuf ./$BASENAME_TEST $kselftest_cmd_args"
113		if [ ! -x "$TEST" ]; then
114			echo "# Warning: file $TEST is not executable"
115
116			if [ $(head -n 1 "$TEST" | cut -c -2) = "#!" ]
117			then
118				interpreter=$(head -n 1 "$TEST" | cut -c 3-)
119				cmd="$stdbuf $interpreter ./$BASENAME_TEST"
120			else
121				echo "not ok $test_num $TEST_HDR_MSG"
122				return
123			fi
124		fi
125		cd `dirname $TEST` > /dev/null
126		((((( tap_timeout "$cmd" 2>&1; echo $? >&3) |
127			tap_prefix >&4) 3>&1) |
128			(read xs; exit $xs)) 4>>"$logfile" &&
129		echo "ok $test_num $TEST_HDR_MSG") ||
130		(rc=$?;	\
131		if [ $rc -eq $skip_rc ]; then	\
132			echo "ok $test_num $TEST_HDR_MSG # SKIP"
133		elif [ $rc -eq $timeout_rc ]; then \
134			echo "#"
135			echo "not ok $test_num $TEST_HDR_MSG # TIMEOUT $kselftest_timeout seconds"
136		else
137			echo "not ok $test_num $TEST_HDR_MSG # exit=$rc"
138		fi)
139		cd - >/dev/null
140	fi
141}
142
143run_many()
144{
145	echo "TAP version 13"
146	DIR="${PWD#${BASE_DIR}/}"
147	test_num=0
148	total=$(echo "$@" | wc -w)
149	echo "1..$total"
150	for TEST in "$@"; do
151		BASENAME_TEST=$(basename $TEST)
152		test_num=$(( test_num + 1 ))
153		if [ -n "$per_test_logging" ]; then
154			logfile="/tmp/$BASENAME_TEST"
155			cat /dev/null > "$logfile"
156		fi
157		run_one "$DIR" "$TEST" "$test_num"
158	done
159}
160