pjdfstest: better handle filesystems mounted with -o noexec

[ngie]

Summary

Better handle filesystems mounted with -o noexec

ftruncate/11, open/20, and truncate/11 all copy sleep(1) to a temporary file on
the target filesystem, execute the binary, then expect a result. This doesn't
work with scenarios where the target binary cannot be executed, e.g. the filesystem
was mounted with -o noexec.

Ensure the filesystem hasn't been mounted with -o noexec for the testcases before
executing them.

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

Test Plan

As root, execute the following commands:

set -e
mdmfs -s 20m md /mnt/reg
for mount_option in noatime noexec nosuid; do
mkdir -p /mnt/$mount_option
mdmfs -s 20m md /mnt/$mount_option
done
for i in /mnt/reg /mnt/noatime /mnt/noexec /mnt/nosuid; do
env PJDFSTEST_TEST_PATH=$i kyua test
done

[ngie]

Moved the logic from tests/sys/pjdfstest/conf to contrib/pjdfstest/tests/misc.sh

[markj]

Thanks!

contrib/pjdfstest/tests/misc.sh

251

I find something like "filesystem mounted with -o noexec" easier to parse.

[markj]

contrib/pjdfstest/tests/misc.sh

239

Hm, where is mountpoint defined?

[ngie]

contrib/pjdfstest/tests/misc.sh

239

It's defined in tests/sys/pjdfstest/tests/conf:

 1 #!/bin/sh
 2 #
 3 # $FreeBSD: head/tests/sys/pjdfstest/tests/conf 274016 2014-11-03 07:18:42Z ngie $
 4 
 5 : ${PJDFSTEST_TEST_PATH=.}
 6 if ! cd ${PJDFSTEST_TEST_PATH}/; then
 7         echo 'Please set PJDFSTEST_TEST_PATH to a valid filesystem path'
 8         echo 'Bail out!'
 9         exit 1
10 fi
11 
12 GREP=grep
13 mountpoint=$(df . | tail -1 | awk '{print $6}')
14 fs=$(mount -p | awk '$2 == "'$mountpoint'" { print toupper($3) }')
15 os=FreeBSD

I should probably rename it as MOUNTPOINT so the fact that it's a global's clearer.

[ngie]

contrib/pjdfstest/tests/misc.sh

239

I added an XXX comment to note where the variable is defined for clarity.

[ngie]

Committed as rS296766.