From a0c2aee4b238912f8fa45af5d90d1ddda25e14a3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 24 Apr 2023 07:48:35 +0200
Subject: Support fully-quoted variables on command line

GRUB rewrites x="y" as "x=y".
---
 buildos | 24 +++++++++++++++++++++---
 init    | 24 +++++++++++++++++++++---
 2 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/buildos b/buildos
index 6b81de3..6a7bcfb 100755
--- a/buildos
+++ b/buildos
@@ -59,6 +59,11 @@ info "starting build os monitor..."
 # foo='foo fox'
 # bar="bar 'box'"
 #
+# Or (as rewritten by GRUB):
+#
+# 'foo=foo fox'
+# "bar=bar 'box'"
+#
 # First we separete quoted variables and arguments with newlines (giving
 # priority to assignments). Then we replace whitespaces with newline on
 # lines that don't contain quites. Finally, we clean up by removing blank
@@ -81,11 +86,24 @@ declare -A toolchains
 toolchains["default"]=""
 
 for v in "${cmdline[@]}"; do
-  var="$(sed -n -re 's/^buildos\.([^=]+)=.*$/\1/p' <<<"$v")" # Extract name.
+
+  # Rewrite "x=y" as x="y" (as well as the single-quote variant).
+  #
+  v1="$(sed -n -re "s/^\"([^= ]+)=(.*)\"\$/\1=\"\2\"/p" <<<"$v")"
+  if [ -n "$v1" ]; then
+    v="$v1"
+  else
+    v1="$(sed -n -re "s/^'([^= ]+)=(.*)'\$/\1='\2'/p" <<<"$v")"
+    if [ -n "$v1" ]; then
+      v="$v1"
+    fi
+  fi
+
+  var="$(sed -n -re 's/^buildos\.([^= ]+)=.*$/\1/p' <<<"$v")" # Extract name.
 
   if [ -n "$var" ]; then
-    val="$(sed -re 's/^[^=]+=(.*)$/\1/' <<<"$v")"            # Extract value.
-    val="$(sed -re "s/^('(.*)'|\"(.*)\")$/\2\3/" <<<"$val")" # Strip quoted.
+    val="$(sed -re 's/^[^= ]+=(.*)$/\1/' <<<"$v")"            # Extract value.
+    val="$(sed -re "s/^('(.*)'|\"(.*)\")\$/\2\3/" <<<"$val")" # Strip quoted.
 
     # Recognize some variables as arrays.
     #
diff --git a/init b/init
index af507c0..0eed64d 100755
--- a/init
+++ b/init
@@ -104,6 +104,11 @@ sensors-detect --auto
 # foo='foo fox'
 # bar="bar 'box'"
 #
+# Or (as rewritten by GRUB):
+#
+# 'foo=foo fox'
+# "bar=bar 'box'"
+#
 # First we separete quoted variables and arguments with newlines (giving
 # priority to assignments). Then we replace whitespaces with newline on
 # lines that don't contain quotes. Finally, clean up by removing blank
@@ -120,11 +125,24 @@ readarray -t cmdline < <(cat /proc/cmdline | \
 #
 info "command line:"
 for v in "${cmdline[@]}"; do
-  var="$(sed -n -re 's/^buildos\.([^=]+)=.*$/\1/p' <<<"$v")" # Extract name.
+
+  # Rewrite "x=y" as x="y" (as well as the single-quote variant).
+  #
+  v1="$(sed -n -re "s/^\"([^= ]+)=(.*)\"\$/\1=\"\2\"/p" <<<"$v")"
+  if [ -n "$v1" ]; then
+    v="$v1"
+  else
+    v1="$(sed -n -re "s/^'([^= ]+)=(.*)'\$/\1='\2'/p" <<<"$v")"
+    if [ -n "$v1" ]; then
+      v="$v1"
+    fi
+  fi
+
+  var="$(sed -n -re 's/^buildos\.([^= ]+)=.*$/\1/p' <<<"$v")" # Extract name.
 
   if [ -n "$var" ]; then
-    val="$(sed -re 's/^[^=]+=(.*)$/\1/' <<<"$v")"            # Extract value.
-    val="$(sed -re "s/^('(.*)'|\"(.*)\")$/\2\3/" <<<"$val")" # Strip quoted.
+    val="$(sed -re 's/^[^= ]+=(.*)$/\1/' <<<"$v")"            # Extract value.
+    val="$(sed -re "s/^('(.*)'|\"(.*)\")\$/\2\3/" <<<"$val")" # Strip quoted.
     info "  $var=$val"
 
     # If the variable contains a dot, then it is a toolchain variable and we
-- 
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