tests: pam: use absolute path to module .so

This is a valid configuration and both (a) skips the tests if it's
unbuilt/not installed and (b) makes it work even if installed outside
the system directory (like in /u/l/l/s instead of /l/s)

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13259

tests/zfs-tests/tests/functional/pam/.gitignore

@@ -0,0 +1 @@
+/utilities.kshlib

tests/zfs-tests/tests/functional/pam/Makefile.am

@@ -6,3 +6,6 @@ dist_pkgdata_SCRIPTS = \
 	pam_nounmount.ksh \
 	pam_short_password.ksh \
 	utilities.kshlib
+
+% : %.in
+	sed 's|@pammoduledir[@]|@pammoduledir@|g' $< > $@

tests/zfs-tests/tests/functional/pam/cleanup.ksh

@@ -26,8 +26,4 @@ rmconfig
 destroy_pool $TESTPOOL
 del_user ${username}
 del_group pamtestgroup
-
-rm -rf "$runstatedir"
-for dir in $TESTDIRS; do
-	rm -rf $dir
-done
+log_must rm -rf "$runstatedir" $TESTDIRS

tests/zfs-tests/tests/functional/pam/setup.ksh

@@ -23,6 +23,7 @@
 . $STF_SUITE/tests/functional/pam/utilities.kshlib
 
 command -v pamtester > /dev/null || log_unsupported "pam tests require the pamtester utility to be installed"
+[ -f "$pammodule" ] || log_unsupported "$pammodule missing"
 
 DISK=${DISKS%% *}
 create_pool $TESTPOOL "$DISK"

tests/zfs-tests/tests/functional/pam/utilities.kshlib.in

@@ -24,24 +24,25 @@
 
 username="pamtestuser"
 runstatedir="${TESTDIR}_run"
+pammodule="@pammoduledir@/pam_zfs_key.so"
 pamservice="pam_zfs_key_test"
 pamconfig="/etc/pam.d/${pamservice}"
 
 function keystatus {
-    log_must [ "$(zfs list -Ho keystatus "$TESTPOOL/pam/${username}")" = "$1" ]
+    log_must [ "$(get_prop keystatus "$TESTPOOL/pam/${username}")" = "$1" ]
 }
 
 function genconfig {
-    for i in password auth session; do
-	printf "%s\trequired\tpam_permit.so\n%s\toptional\tpam_zfs_key.so\t%s\n" "$i" "$i" "$1"
-    done > "${pamconfig}"
+    printf '%s\trequired\tpam_permit.so\n%s\toptional\t%s\t%s\n' \
+        password password "$pammodule" "$1" \
+        auth     auth     "$pammodule" "$1" \
+        session  session  "$pammodule" "$1" > "${pamconfig}"
 }
 
 function rmconfig {
-    log_must rm "${pamconfig}"
+    log_must rm -f "${pamconfig}"
 }
 
 function references {
     log_must [ "$(<"${runstatedir}/$(id -u ${username})")" = "$1" ]
 }
-