1#
2# CDDL HEADER START
3#
4# The contents of this file are subject to the terms of the
5# Common Development and Distribution License (the "License").
6# You may not use this file except in compliance with the License.
7#
8# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9# or http://www.opensolaris.org/os/licensing.
10# See the License for the specific language governing permissions
11# and limitations under the License.
12#
13# When distributing Covered Code, include this CDDL HEADER in each
14# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15# If applicable, add the following below this CDDL HEADER, with the
16# fields enclosed by brackets "[]" replaced with your own identifying
17# information: Portions Copyright [yyyy] [name of copyright owner]
18#
19# CDDL HEADER END
20#
21
22#
23# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24# Use is subject to license terms.
25#
26#pragma ident	"@(#)tst.execfail.ksh	1.1	06/08/28 SMI"
27
28#
29# This script tests that -- if a exec(2) fails -- the proc:::exec probe fires,
30# followed by the proc:::exec-success probe (in a successful exec(2)).  To
31# circumvent any potential shell cleverness, this script generates exec
32# failure by generating a file with a bogus interpreter.  (It seems unlikely
33# that a shell -- regardless of how clever it claims to be -- would bother to
34# validate the interpreter before exec'ing.)
35#
36# If this fails, the script will run indefinitely; it relies on the harness
37# to time it out.
38#
39script()
40{
41	$dtrace -s /dev/stdin <<EOF
42	proc:::exec
43	/curpsinfo->pr_ppid == $child && args[0] == "$badexec"/
44	{
45		self->exec = 1;
46	}
47
48	proc:::exec-failure
49	/self->exec/
50	{
51		exit(0);
52	}
53EOF
54}
55
56sleeper()
57{
58	while true; do
59		if [ -f /usr/lib/dtrace/darwin.d ]; then
60			/bin/sleep 1
61		else
62			/usr/bin/sleep 1
63		fi
64		$badexec
65	done
66}
67
68badexec=/tmp/execfail.ksh.$$
69dtrace=/usr/sbin/dtrace
70
71cat > $badexec <<EOF
72#!/this_is_a_bogus_interpreter
73EOF
74
75chmod +x $badexec
76
77sleeper &
78child=$!
79script
80status=$?
81
82kill $child
83rm $badexec
84
85exit $status
86