From 174ff59dba8c24f544e354cd43f3b68aea91d265 Mon Sep 17 00:00:00 2001
From: Jan Steffens <jan.steffens@gmail.com>
Date: Sun, 13 Mar 2011 19:06:27 +0100
Subject: Add flock-based locking to chroots

This prevents accidents when chroots are shared between multiple users.
---
 archbuild | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'archbuild')

diff --git a/archbuild b/archbuild
index 7e8c456..9dd4888 100755
--- a/archbuild
+++ b/archbuild
@@ -36,6 +36,19 @@ fi
 
 if ${clean_first} || [ ! -d "${chroots}/${repo}-${arch}" ]; then
 	echo "Creating chroot for [${repo}] (${arch})..."
+
+	for copy in ${chroots}/${repo}-${arch}/*; do
+		[[ -d $copy ]] || continue
+		echo "Deleting chroot copy '$(basename "${copy}")'..."
+
+		# Lock the copy
+		exec 9>${copy}.lock
+		flock 9
+
+		rm -rf ${copy}
+	done
+	exec 9>&-
+
 	rm -rf ${chroots}/${repo}-${arch}
 	mkdir -p ${chroots}/${repo}-${arch}
 	setarch ${arch} mkarchroot \
-- 
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