10509 zpool_003_pos can't find core file

Reviewed by: Toomas Soome <tsome@me.com>
Reviewed by: Marco van Wieringen <marco.van.wieringen@planets.elm.net>
Reviewed by: Andy Fiddaman <illumos@fiddaman.net>
Approved by: Dan McDonald <danmcd@mnx.io>

usr/src/test/zfs-tests/tests/functional/cli_root/zpool/zpool_003_pos.ksh

@@ -27,6 +27,7 @@
 
 #
 # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
+# Copyright 2024 Jason King
 #
 
 . $STF_SUITE/include/libtest.shlib
@@ -57,15 +58,18 @@ fi
 
 log_mustnot zpool freeze fakepool
 
+coreadm -p $TESTDIR/core.%f
+corefile=$TESTDIR/core.zpool
+
 # Remove corefile possibly left by previous failing run of this test.
-[[ -f core ]] && log_must rm -f core
+[[ -f $corefile ]] && log_must rm -f $corefile
 
 ZFS_ABORT=1; export ZFS_ABORT
 ulimit -c unlimited
 zpool > /dev/null 2>&1
 unset ZFS_ABORT
 
-[[ -f core ]] || log_fail "zpool did not dump core by request."
-[[ -f core ]] && log_must rm -f core
+[[ -f $corefile ]] || log_fail "zpool did not dump core by request."
+[[ -f $corefile ]] && log_must rm -f $corefile
 
 log_pass "Debugging features of zpool succeed."