From 874616addcc7eafe407fb57fe4354721e5901d4b Mon Sep 17 00:00:00 2001
From: Bryan Drewery <bryan@shatow.net>
Date: Wed, 9 Nov 2022 11:31:09 -0800
Subject: mapfile sh compat: Fix handling of escapes

---
 src/share/poudriere/include/util.sh |  2 +-
 test/mapfile.sh                     | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/share/poudriere/include/util.sh b/src/share/poudriere/include/util.sh
index 657c5a65..a4fc4d34 100644
--- a/src/share/poudriere/include/util.sh
+++ b/src/share/poudriere/include/util.sh
@@ -699,7 +699,7 @@ mapfile_read() {
 	fi
 
 	hash_get mapfile_fd "${handle}" fd || fd=8
-	read_blocking "$@" <&${fd}
+	read_blocking -r "$@" <&${fd}
 }
 
 mapfile_write() {
diff --git a/test/mapfile.sh b/test/mapfile.sh
index 81054f1a..0d96c6ce 100644
--- a/test/mapfile.sh
+++ b/test/mapfile.sh
@@ -208,6 +208,20 @@ if mapfile_builtin; then
 }
 fi
 
+# Test \ handling
+{
+	TMP=$(mktemp -t mapfile)
+
+	expected='\blah\\b\\\\lah'
+	echo "${expected}" >> "${TMP}"
+	assert_ret 0 mapfile handle "${TMP}" "re"
+	unset line
+	assert_ret 0 mapfile_read "${handle}" line
+	assert_ret 0 mapfile_close "${handle}"
+	assert "${expected}" "${line}" "line with backslashes should match"
+	rm -f "${TMP}"
+}
+
 # Should only return full lines as read(1) does
 {
 	rm -f "${TMP}"
-- 
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