testing: Add IGNORE_UNPRIV_USERNS_TESTS to skip tests that use userns

Signed-off-by: Alexey Gladkov <[email protected]>

Author: legionus

features/overlayfs/tests/ts0001-guess-overlayfs/run

@@ -1,5 +1,8 @@
 #!/bin/bash -eu
 
+[ -z "${IGNORE_UNPRIV_USERNS_TESTS-}" ] ||
+	exit 127
+
 cwd="${0%/*}"
 
 export GUESS_SUFFIX=add:guess-root

features/rootfs/tests/ts0001-guess-rootfs/run

@@ -1,5 +1,8 @@
 #!/bin/bash -eu
 
+[ -z "${IGNORE_UNPRIV_USERNS_TESTS-}" ] ||
+	exit 127
+
 cwd="${0%/*}"
 
 export GUESS_SUFFIX=add:guess-root

testing/tests/run

@@ -29,7 +29,7 @@ for testsuite in "$@"; do
 			num="$(printf '%4s' "$i")"
 			i=$(( $i + 1 ))
 
-			echo "[$num/$max] ${ts##*/}"
+			echo -n "[$num/$max] ${ts##*/} "
 		fi
 
 		{
@@ -38,6 +38,15 @@ for testsuite in "$@"; do
 			echo "rc=$rc";
 		} > "$ts"/output 2>&1
 
+		if [ "$rc" = 127 ]; then
+			[ -z "${VERBOSE:-${V:-}}" ] ||
+				echo "[skipped]"
+			rm -f -- "$ts"/output
+			continue
+		fi
+		[ -z "${VERBOSE:-${V:-}}" ] ||
+			echo
+
 		[ ! -f "$ts"/expect.in ] ||
 			sed \
 			-e "s#@ts@#${ts##*/}#g" \