git: 97a74bbe38eb - main - stress2: Added a regression test

The branch main has been updated by pho:

URL: https://cgit.FreeBSD.org/src/commit/?id=97a74bbe38ebdf682e583d8b92f49e137fa2b7c4

commit 97a74bbe38ebdf682e583d8b92f49e137fa2b7c4
Author:     Peter Holm <pho@FreeBSD.org>
AuthorDate: 2021-10-29 09:04:49 +0000
Commit:     Peter Holm <pho@FreeBSD.org>
CommitDate: 2021-10-29 09:04:49 +0000

    stress2: Added a regression test
---
 tools/test/stress2/misc/execpath.sh | 105 ++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)

diff --git a/tools/test/stress2/misc/execpath.sh b/tools/test/stress2/misc/execpath.sh
new file mode 100755
index 000000000000..4323e3b7d505
--- /dev/null
+++ b/tools/test/stress2/misc/execpath.sh
@@ -0,0 +1,105 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2021 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# Bug 248184 - readlink("/proc/curproc/file") returns arbitrary correct name for programs with more than one link (name)
+# Test scenario for D32611 "exec: provide right hardlink name in AT_EXECPATH"
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/execpath.c
+mycc -o execpath -Wall -Wextra -O0 -g execpath.c || exit 1
+rm -f execpath.c
+cd $odir
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+set +e
+
+cd $mntpoint
+mkdir d1 d2
+cp /bin/sleep .
+ln sleep d1/sleep
+ln sleep d2/sleep
+s=0
+for p in $mntpoint/sleep $mntpoint/d1/sleep $mntpoint/d2/sleep; do
+	(cd `dirname $p`; ./`basename $p` 10) &
+	/bin/sleep .2
+	path=`procstat binary $! | awk "/$!/ {print \\$NF}"`
+	kill $!
+	wait
+	[ "$path" != "$p" ] && { s=1; echo "fail path=$path : prog=$p"; }
+done
+mv /tmp/execpath d1
+ln d1/execpath d2/execpath
+
+r=`./d1/execpath`
+echo $r | grep -q "/d1/" || { s=1; echo "fail: $r. Expected d1 @ 1"; }
+r=`./d2/execpath`
+echo $r | grep -q "/d2/" || { s=1; echo "fail: $r. Expected d2 @ 2"; }
+r=`(cd d1; ./execpath)`
+echo $r | grep -q "/d1/" || { s=1; echo "fail: $r. Expected d1 @ 3"; }
+r=`(cd d2; ./execpath)`
+echo $r | grep -q "/d2/" || { s=1; echo "fail: $r. Expected d2 @ 4"; }
+
+cd $odir
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+	[ $i -eq 6 ] &&
+	    { echo FATAL; fstat -mf $mntpoint; exit 1; }
+done
+mdconfig -d -u $mdstart
+exit $s
+
+EOF
+/* Test scenario by Tobias Kortkamp <tobik@freebsd.org> */
+
+#include <sys/auxv.h>
+#include <limits.h>
+#include <stdio.h>
+
+int
+main(void)
+{
+	char pathname[PATH_MAX];
+
+	elf_aux_info(AT_EXECPATH, pathname, PATH_MAX);
+	puts(pathname);
+	return 0;
+}