From 50c3bba44ffff5c4105648275f36aa64e6a96e02 Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Wed, 20 May 2020 14:57:02 +0300
Subject: add option to log boot and shutdown to a file

---
 rc.boot     |  4 ++--
 rc.conf     |  5 +++++
 rc.lib      | 19 ++++++++++++++++---
 rc.shutdown |  2 +-
 4 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/rc.boot b/rc.boot
index 24f3a4d..3a59a79 100755
--- a/rc.boot
+++ b/rc.boot
@@ -12,7 +12,7 @@ mnt() {
     done < /proc/mounts
 
     mnt="$1"; shift
-    mount "$@" "$mnt"
+    mount "$@" "$mnt" 2>&1 | log
 }
 
 # Display a pretty welcome message
@@ -61,7 +61,7 @@ out "Remounting rootfs as read-only..."; {
 
 [ "$FASTBOOT" = 1 ] || {
     out "Checking filesystems..."
-    fsck "-ATat${FORCEFSCK}" noopts=_netdev
+    fsck "-ATat${FORCEFSCK}" noopts=_netdev 2>&1 | log
     [ $? -gt 1 ] && shell
 }
 
diff --git a/rc.conf b/rc.conf
index 7a8ce97..c201f45 100644
--- a/rc.conf
+++ b/rc.conf
@@ -8,3 +8,8 @@ keymap=
 # Set dmesg level
 dmesg_level=
 
+# Enable logging
+# log=1
+
+# Set log directory (default /var/log/init)
+# log_dir=
\ No newline at end of file
diff --git a/rc.lib b/rc.lib
index 7d5068d..57f66d4 100644
--- a/rc.lib
+++ b/rc.lib
@@ -1,10 +1,22 @@
 # rc.lib -- common functions for rc.boot and rc.shutdown
-# shellcheck disable=1090
+# shellcheck disable=1090,2034
 
 export PATH=$PATH:/usr/local/bin:/usr/bin
 
-out() { printf '\033[1;36m-> \033[39m%s\033[m\n' "$@" ;}
-err() { printf '\033[1;31m!> \033[39m%s\033[m\n' "$@" ;}
+log_file="${log_dir:=/var/log/init}/$(date +%Y%m%d-%H%M)-${0##*.}"
+
+log() {
+    [ "$log" = 1 ] || {
+        cat
+        return 0
+    }
+    mkdir -p "$log_dir"
+    tee -a "$log_file"
+}
+
+
+out() { printf '\033[1;36m-> \033[39m%s\033[m\n' "$@" | log ;}
+err() { printf '\033[1;31m!> \033[39m%s\033[m\n' "$@" | log ;}
 
 shell() {
     err "Dropping to shell, type 'exit' to continue the boot process."
@@ -58,6 +70,7 @@ parse_cmdline() {
             ro) RO=1 ;;
             forcefsck) FORCEFSCK="-f" ;;
             fastboot)  FASTBOOT=1 ;;
+            log) log=1 ;;
         esac
     done
 }
diff --git a/rc.shutdown b/rc.shutdown
index 292284f..7f99c4c 100755
--- a/rc.shutdown
+++ b/rc.shutdown
@@ -36,7 +36,7 @@ out "Remounting rootfs as readonly"; {
     mount -o remount,ro /
 
     sync
-}
+} 2>&1 | log
 
 run_hook post.shutdown
 
-- 
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