From a64b09d741a61771bd08a944ac60419f0fb9d058 Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Wed, 20 May 2020 13:01:16 +0300
Subject: init: primitive parsing of the command line

---
 rc.lib | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'rc.lib')

diff --git a/rc.lib b/rc.lib
index e0ee61f..7d5068d 100644
--- a/rc.lib
+++ b/rc.lib
@@ -39,3 +39,25 @@ random() {
     esac
 }
 
+parse_cmdline() {
+    # This is a primitive way of parsing kernel command line
+    # options. Before now, carbs-init ignored these options
+    # set by the user. More will be added as needed. Init scripts
+    # don't need to handle most of the command line options
+    # as the kernel deals with most of them, but not things
+    # such as mount options.
+    [ -r /proc/cmdline ] || {
+        err "Kernel command line options cannot be parsed"
+        shell
+    }
+
+    # We want to read words instead of lines here.
+    # shellcheck disable=2013
+    for arg in $(cat /proc/cmdline); do
+        case "$arg" in
+            ro) RO=1 ;;
+            forcefsck) FORCEFSCK="-f" ;;
+            fastboot)  FASTBOOT=1 ;;
+        esac
+    done
+}
-- 
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