ZTS: Remove procfs use from zpool_import_status

procfs might be not mounted on FreeBSD.  Plus checking for specific
PID might be not exactly reliable.  Check for empty list of jobs
instead.

Premature loop exit can result in failed test and failed cleanup,
failing also some following tests.

Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Tony Hutter <[email protected]>
Reviewed-by: Tino Reichardt <[email protected]>
Signed-off-by:Alexander Motin <[email protected]>
Sponsored by: iXsystems, Inc.
Closes #11141

Author: amotin

tests/zfs-tests/tests/functional/cli_root/zpool_import/zpool_import_status.ksh

@@ -103,21 +103,16 @@ log_must zpool export $TESTPOOL1
 log_must set_tunable64 METASLAB_DEBUG_LOAD 1
 log_note "Starting zpool import in background at" $(date +'%H:%M:%S')
 zpool import -d $DEVICE_DIR -f $guid &
-pid=$!
 
 #
 # capture progress until import is finished
 #
-log_note waiting for pid $pid to exit
 kstat import_progress
-while [[ -d /proc/"$pid" ]]; do
+while [[ -n $(jobs) ]]; do
 	line=$(kstat import_progress | grep -v pool_guid)
 	if [[ -n $line ]]; then
 		echo $line
 	fi
-	if [[ -f /$TESTPOOL1/fs/00 ]]; then
-		break;
-	fi
 	sleep 0.0001
 done
 log_note "zpool import completed at" $(date +'%H:%M:%S')