[git.ipfire.org] IPFire 2.x development tree branch, next, updated. faccfa70754fabaed56c9147ace4d509f7d2317c

[git.ipfire.org] IPFire 2.x development tree branch, next, updated. faccfa70754fabaed56c9147ace4d509f7d2317c

[Michael Tremer]

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- Log -----------------------------------------------------------------
commit faccfa70754fabaed56c9147ace4d509f7d2317c
Author: Michael Tremer <michael.tremer(a)ipfire.org>
Date:   Wed Aug 28 15:41:55 2024 +0000

    make.sh: Don't try to create a time NS on older kernels
    
    This is not supported on kernels < 5.6.
    
    Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>

commit 5e8730eb9aec83a76b3ae7719925ede8470069a6
Author: Michael Tremer <michael.tremer(a)ipfire.org>
Date:   Wed Aug 28 15:28:42 2024 +0000

    make.sh: Bind-mount /proc as a workaround for unshare
    
    unshare seems to want to change the mount propagation for /proc
    before it has been mounted. In order to workaround that problem,
    we bind-mount /proc to itself before.
    
    Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>

-----------------------------------------------------------------------

Summary of changes:
 make.sh | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

Difference in files:
diff --git a/make.sh b/make.sh
index 8c5e1c6e7..4d0894864 100755
--- a/make.sh
+++ b/make.sh
@@ -54,9 +54,19 @@ ARCHES=(
 )
 
 HOST_ARCH="${HOSTTYPE}"
+HOST_KERNEL="$(uname -r)"
 LC_ALL=POSIX
 PS1='\u:\w$ '
 
+HAS_TIME_NAMESPACE="true"
+
+# Disable time namespaces for older kernels
+case "${HOST_KERNEL}" in
+	4.*|5.[12345].*)
+		HAS_TIME_NAMESPACE="false"
+		;;
+esac
+
 # Are we reading from/writing to a terminal?
 is_terminal() {
 	[ -t 0 ] && [ -t 1 ] && [ -t 2 ]
@@ -461,6 +471,10 @@ prepareenv() {
 	mount build_tmp "${BUILD_DIR}/tmp" \
 		-t tmpfs -o "nosuid,nodev,strictatime,size=4G,nr_inodes=1M,mode=1777"
 
+	# Create an empty /proc directory and make it a mountpoint
+	mkdir -p "${BUILD_DIR}/proc"
+	mount --bind "${BUILD_DIR}/proc" "${BUILD_DIR}/proc"
+
 	# Make all sources and proc available under lfs build
 	mount --bind     	/sys					"${BUILD_DIR}/sys"
 	mount --bind -o ro	"${BASEDIR}/cache"		"${BUILD_DIR}/usr/src/cache"
@@ -670,9 +684,6 @@ execute() {
 			"--pid"
 			"--fork"
 
-			# Create a new time namespace
-			"--time"
-
 			# Create a new UTS namespace
 			"--uts"
 
@@ -683,6 +694,11 @@ execute() {
 			# If unshare is asked to terminate, terminate all child processes
 			"--kill-child"
 		)
+
+		# Optionally set up a new time namespace
+		if [ "${HAS_TIME_NAMESPACE}" = "true" ]; then
+			unshare+=( "--time" )
+		fi
 	fi
 
 	while [ $# -gt 0 ]; do


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