From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 4 Jul 2024 17:48:53 +0000 (+0000)
Subject: make.sh: Create a new, minimal /dev in the build environment
X-Git-Tag: v2.29-core188~10^2~376
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e940d23cf87eef88d40bb1e8ed360685d21049e0;p=ipfire-2.x.git

make.sh: Create a new, minimal /dev in the build environment

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/make.sh b/make.sh
index b684cc973c..490d3578bf 100755
--- a/make.sh
+++ b/make.sh
@@ -402,6 +402,8 @@ prepareenv() {
 	# Set LFS Directory
 	LFS=$BASEDIR/build
 
+	BUILD_DIR="${BASEDIR}/build"
+
 	# Setup environment
 	set +h
 	LC_ALL=POSIX
@@ -424,13 +426,53 @@ prepareenv() {
 
 	mkdir -p $BASEDIR/build/usr/src/{cache,config,doc,html,langs,lfs,log,src,ccache}
 
-	mknod -m 600 $BASEDIR/build/dev/console c 5 1 2>/dev/null
-	mknod -m 666 $BASEDIR/build/dev/null c 1 3 2>/dev/null
+	# Create a new, minimal /dev
+	mount build_dev "${BUILD_DIR}/dev" \
+		-t tmpfs -o "nosuid,noexec,mode=0755,size=4m,nr_inodes=64k"
+
+	# Create device nodes
+	mknod -m 600 "${BUILD_DIR}/dev/console"			c   5   1
+	mknod -m 666 "${BUILD_DIR}/dev/null"			c   1   3
+	mknod -m 666 "${BUILD_DIR}/dev/zero"			c   1   5
+	mknod -m 666 "${BUILD_DIR}/dev/full"			c   1   7
+	mknod -m 444 "${BUILD_DIR}/dev/random"			c   1   8
+	mknod -m 444 "${BUILD_DIR}/dev/urandom"			c   1   9
+	mknod -m 444 "${BUILD_DIR}/dev/kmsg"			c   1  11
+	mknod -m 666 "${BUILD_DIR}/dev/tty"				c   5   0
+	mknod -m 666 "${BUILD_DIR}/dev/rtc0"			c 252   0
+
+	# Create loop devices
+	mknod -m 666 "${BUILD_DIR}/dev/loop-control"	c  10 237
+	mknod -m 666 "${BUILD_DIR}/dev/loop0"			c   7   0
+	mknod -m 666 "${BUILD_DIR}/dev/loop1"			c   7   1
+	mknod -m 666 "${BUILD_DIR}/dev/loop2"			c   7   2
+	mknod -m 666 "${BUILD_DIR}/dev/loop3"			c   7   3
+	mknod -m 666 "${BUILD_DIR}/dev/loop4"			c   7   4
+	mknod -m 666 "${BUILD_DIR}/dev/loop5"			c   7   5
+	mknod -m 666 "${BUILD_DIR}/dev/loop6"			c   7   6
+	mknod -m 666 "${BUILD_DIR}/dev/loop7"			c   7   7
+
+	# Create directories
+	mkdir -p "${BUILD_DIR}/dev/pts"
+	mkdir -p "${BUILD_DIR}/dev/shm"
+
+	# Create symlinks
+	ln -s  "pts/ptmx"				"${BUILD_DIR}/dev/ptmx"
+	ln -s "../proc/self/fd"			"${BUILD_DIR}/dev/fd"
+	ln -s "../proc/self/fd/0"		"${BUILD_DIR}/dev/stdin"
+	ln -s "../proc/self/fd/1"		"${BUILD_DIR}/dev/stdout"
+	ln -s "../proc/self/fd/2"		"${BUILD_DIR}/dev/stderr"
+	ln -s "../proc/kcore"			"${BUILD_DIR}/dev/core"
+
+	# Mount a new /dev/pts
+	mount build_dev_pts "${BUILD_DIR}/dev/pts" \
+		-t devpts -o "nosuid,noexec,newinstance,ptmxmode=0666,mode=620"
+
+	# Mount a new /dev/shm
+	mount build_dev_shm "${BUILD_DIR}/dev/shm" \
+		-t tmpfs -o "nosuid,nodev,strictatime,mode=1777,size=1024m"
 
 	# Make all sources and proc available under lfs build
-	mount --bind /dev            $BASEDIR/build/dev
-	mount --bind /dev/pts        $BASEDIR/build/dev/pts
-	mount --bind /dev/shm        $BASEDIR/build/dev/shm
 	mount --bind /sys            $BASEDIR/build/sys
 	mount --bind $BASEDIR/cache  $BASEDIR/build/usr/src/cache
 	mount --bind $BASEDIR/ccache/${BUILD_ARCH}/${TOOLCHAINVER} $BASEDIR/build/usr/src/ccache