kernel-install: Skip execution if $KERNEL_INSTALL_BYPASS=1

diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index 5f02f888a5ed3a8f61d4b981ecca5a4a82c0c490..257874d95c080487a8587b4bff97feb3e82c8584 100644 (file)
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -441,3 +441,10 @@ SYSTEMD_HOME_DEBUG_SUFFIX=foo \
   use for LUKS home directories, overriding the built-in default mount
   options. There's one variable for each of the supported file systems for the
   LUKS home directory backend.
+
+`kernel-install`:
+
+* `$KERNEL_INSTALL_BYPASS` – If set to "1", execution of kernel-install is skipped
+  when kernel-install is invoked. This can be useful if kernel-install is invoked
+  unconditionally as a child process by another tool, such as package managers
+  running kernel-install in a postinstall script.

diff --git a/src/kernel-install/kernel-install.in b/src/kernel-install/kernel-install.in
index f6d262f5226bc40d17d502ca504b86767d3f948a..293ed044d1688ec4fcba595afeadbc78364aa835 100755 (executable)
--- a/src/kernel-install/kernel-install.in
+++ b/src/kernel-install/kernel-install.in
@@ -67,6 +67,11 @@ for i; do
     fi
 done
 
+if [ "$KERNEL_INSTALL_BYPASS" = "1" ]; then
+    echo "kernel-install: Skipping execution because KERNEL_INSTALL_BYPASS=1"
+    exit 0
+fi
+
 export KERNEL_INSTALL_VERBOSE=0
 if [ "$1" = "--verbose" ] || [ "$1" = "-v" ]; then
     shift