[import] fix stdin/stdout pipe behavior in import/export tar/raw

The code existed in machinectl to use stdin/stdout if the path for
import/export tar/raw was empty or dash (-) but a check to
`fd_verify_regular` in importd prevented it from working.

Update the check instead to explicitly check for regular file or
pipe/fifo.

Fixes #14346

1 files changed, 12 insertions, 0 deletions

diff --git a/test/TEST-25-IMPORT/testsuite.sh b/test/TEST-25-IMPORT/testsuite.sh
index 380ba3d82d..d4efd71e06 100755
--- a/test/TEST-25-IMPORT/testsuite.sh
+++ b/test/TEST-25-IMPORT/testsuite.sh
@@ -119,6 +119,18 @@ machinectl remove scratch4
 ! test -f /var/lib/machines/scratch4
 ! machinectl image-status scratch4
 
+# Test import-tar hypen/stdin pipe behavior
+cat /var/tmp/scratch.tar.gz | machinectl import-tar - scratch5
+test -d /var/lib/machines/scratch5
+machinectl image-status scratch5
+diff -r /var/tmp/scratch/ /var/lib/machines/scratch5
+
+# Test export-tar hypen/stdout pipe behavior
+mkdir -p /var/tmp/extract
+machinectl export-tar scratch5 - | tar xvf - -C /var/tmp/extract/
+diff -r /var/tmp/scratch/ /var/tmp/extract/
+rm -rf /var/tmp/extract
+
 rm -rf /var/tmp/scratch
 
 echo OK > /testok