#!/bin/sh
#
# Check strace options syntax.
#
# Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
# Copyright (c) 2016-2019 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later

. "./syntax.sh"

check_e "Invalid process id: '0'" -p 0
check_e "Invalid process id: '-42'" -p -42
check_e "Invalid process id: '$$.'" -p $$.
check_e "Invalid process id: 'a'" -p 1,a
check_e "Syscall 'chdir' for -b isn't supported" -b chdir
check_e "Syscall 'chdir' for -b isn't supported" -b execve -b chdir

check_e_using_grep 'exec: File *name too long' "$(printf '%4096s' ' ')"

ff_name="$(printf '%4084s' ' ')"
check_e_using_grep "$ff_name: File *name too long" -ff -o "$ff_name" true

check_h 'must have PROG [ARGS] or -p PID'
check_h 'PROG [ARGS] must be specified with -D' -D -p $$
check_h '-c and -C are mutually exclusive' -c -C true
check_h '-c and -C are mutually exclusive' -C -c true
check_h '(-c or -C) and -ff are mutually exclusive' -c -ff true
check_h '(-c or -C) and -ff are mutually exclusive' -C -ff true
check_h '-w must be given with (-c or -C)' -w true
check_h 'piping the output and -ff are mutually exclusive' -o '|' -ff true
check_h 'piping the output and -ff are mutually exclusive' -o '!' -ff true
check_h "invalid -a argument: '-42'" -a -42
check_h "invalid -O argument: '-42'" -O -42
check_h "invalid -s argument: '-42'" -s -42
check_h "invalid -s argument: '1073741824'" -s 1073741824
check_h "invalid -I argument: '5'" -I 5
check_h "invalid -X argument: 'test'" -Xtest
check_h "invalid -X argument: 'a'" -Xa
check_h "invalid -X argument: 'abbreviated'" -X abbreviated

check_h "incorrect personality designator '' in qualification 'getcwd@'" -e trace=getcwd@
check_h "incorrect personality designator '42' in qualification 'getcwd@42'" -e trace=getcwd@42
check_h "incorrect personality designator '42' in qualification 'getcwd@42'" -e trace=gettid,getcwd@42
check_h "incorrect personality designator '42' in qualification '23@42'" -e trace=23@42,123

check_e "invalid system call '/getcwd@ohmy'" -e trace=/getcwd@ohmy
check_e "invalid -e kvm= argument: 'chdir'" -e kvm=chdir

case "$STRACE_NATIVE_ARCH" in
x86_64)
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@64
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@x32
	;;
x32)
	check_h "incorrect personality designator '64' in qualification 'getcwd@64'" -e trace=getcwd@64
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@x32
	;;
aarch64|powerpc64|riscv64|s390x|sparc64|tile)
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@64
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@32
	check_h "incorrect personality designator 'x32' in qualification 'getcwd@x32'" -e trace=getcwd@x32
	;;
*)
	pers="$((SIZEOF_LONG * 8))"
	inv_pers="$((96 - pers))"
	check_h "must have PROG [ARGS] or -p PID" -e trace=getcwd@"$pers"
	check_h "incorrect personality designator '$inv_pers' in qualification 'getcwd@$inv_pers'" -e trace=getcwd@"$inv_pers"
	check_h "incorrect personality designator 'x32' in qualification 'getcwd@x32'" -e trace=getcwd@x32
esac

../zeroargc "$STRACE_EXE" /bin/true 2> "$LOG" &&
	dump_log_and_fail_with \
		'zeroargc strace failed to handle the error properly'
cat > "$EXP" << __EOF__
$STRACE_EXE: must have PROG [ARGS] or -p PID
Try '$STRACE_EXE -h' for more information.
__EOF__
diff -u -- "$EXP" "$LOG" > /dev/null || {
	cat > "$EXP" <<- '__EOF__'
	strace: must have PROG [ARGS] or -p PID
	Try 'strace -h' for more information.
	__EOF__
	match_diff "$LOG" "$EXP" \
		"zeroargc $STRACE $args output mismatch"
}

uid="${UID:-`id -u`}"
if [ "$uid" -ge 0 ]; then
	if [ "$uid" -eq 0 ]; then
		umsg="Cannot find user ':nosuchuser:'"
	else
		umsg='You must be root to use the -u option'
	fi

	check_e "$umsg" -u :nosuchuser: true

	for c in i r t T y; do
		check_e "-$c has no effect with -c
$STRACE_EXE: $umsg" -u :nosuchuser: -c -$c true
	done
		check_e "-i has no effect with -c
$STRACE_EXE: -r has no effect with -c
$STRACE_EXE: -t has no effect with -c
$STRACE_EXE: -T has no effect with -c
$STRACE_EXE: -y has no effect with -c
$STRACE_EXE: $umsg" -u :nosuchuser: -cirtTy true
fi

args='-p 2147483647'
$STRACE $args 2> "$LOG" &&
	dump_log_and_fail_with \
		"strace $args failed to handle the error properly"

for cmd in PTRACE_SEIZE PTRACE_ATTACH; do
	cat > "$EXP" << __EOF__
$STRACE_EXE: attach: ptrace($cmd, 2147483647): No such process
__EOF__
	diff -- "$EXP" "$LOG" ||
		continue
	args=
	break
done

[ -z "$args" ] ||
	dump_log_and_fail_with \
		"strace $args failed to print expected diagnostics"
