initrd/etc/functions.sh, DEBUG_LOG_COPY_INSTRUCTIONS: skip EFI configs and add ISO signing instructions

initrd/etc/functions.sh:
- Skip *EFI*, *efi*, *x86_64-efi* config files in scan_boot_options() to
  avoid parsing EFI-only bootloader configs that reference non-existent
  paths on BIOS-booted systems
- Remove stale 'plain text - no ANSI codes' comments from logging functions
  (ANSI codes are preserved in debug.log)

initrd/etc/DEBUG_LOG_COPY_INSTRUCTIONS:
- Add ISO signing instructions to recovery shell wall message, telling
  the user how to mount USB read-write and sign an ISO with
  gpg --detach-sign

Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: tlaurion

initrd/etc/DEBUG_LOG_COPY_INSTRUCTIONS

@@ -11,3 +11,8 @@ Welcome to the Recovery Shell!
 	  - 'cp /tmp/debug.log /tmp/measuring_trace.log /media/' # copy both logs
 	  - 'umount /media' # flush writes and safely unmount
 - Share both log files with developers.
+- To sign an ISO with your GPG key for future USB boot (from recovery shell):
+	- 'mount-usb.sh --mode rw' # mount USB read-write at /media
+	- 'gpg --detach-sign --armor /media/ISOs/<iso-file>' # create .asc
+	- 'umount /media' # flush writes and safely unmount
+	- Reboot and select the ISO again — signature will be verified

initrd/etc/functions.sh

@@ -23,7 +23,6 @@ esac
 # Red is the universal "error/danger" signal; the "!!! ERROR:" text prefix
 # carries the same meaning for users who cannot distinguish red from other
 # colors, so color is an enhancement rather than the sole signal.
-# debug.log and /dev/kmsg receive plain text (no ANSI).
 # Always visible in all output modes.
 DIE() {
 	TRACE_FUNC
@@ -201,8 +200,7 @@ NOTE() {
 	echo >/dev/console 2>/dev/null
 	echo -e "\033[3;37mNOTE:\033[0m $*" >/dev/console 2>/dev/null
 	echo >/dev/console 2>/dev/null
-	# Log file: plain text - no ANSI codes in debug.log; echo -e so \n in the
-	# message produces real newlines in the log (multi-line NOTE support).
+	# Log file: echo -e so \n in the message produces real newlines
 	echo -e "NOTE: $*" >>/tmp/debug.log
 
 	# Sleep to bring the message to the user's awareness: NOTE is infrequent
@@ -249,7 +247,6 @@ NOTE() {
 STATUS() {
 	# Console: bold >> prefix to /dev/console - announces an action in progress.
 	echo -e "\033[1m >>\033[0m $*" >/dev/console 2>/dev/null
-	# Log file: plain text - no ANSI codes in debug.log
 	echo " >> $*" >>/tmp/debug.log
 }
 
@@ -263,7 +260,6 @@ STATUS_OK() {
 	#   2. Bold green color - instant visual scan for sighted users
 	# (Same convention as Linux/systemd "[  OK  ]" boot messages.)
 	echo -e "\033[1;32m OK\033[0m $*" >/dev/console 2>/dev/null
-	# Log file: plain text - no ANSI codes in debug.log
 	echo " OK $*" >>/tmp/debug.log
 }
 
@@ -308,9 +304,6 @@ INFO() {
 		echo "INFO: $*" | tee -a /tmp/debug.log /tmp/measuring_trace.log >/dev/null
 	else
 		# info mode: green text to /dev/console AND both log files.
-		# /dev/console = kernel console (follows console= kernel parameter):
-		# reaches serial, framebuffer, BMC — no process setup needed, callers
-		# never need to care about redirections.
 		echo -e "\033[0;32m$*\033[0m" >/dev/console 2>/dev/null
 		echo "INFO: $*" | tee -a /tmp/debug.log /tmp/measuring_trace.log >/dev/null
 	fi
@@ -2659,14 +2652,17 @@ scan_boot_options() {
 	option_file="$3"
 
 	if [ -r "$option_file" ]; then rm "$option_file"; fi
-	for i in $(find "$bootdir" -name "$config"); do
+	find "$bootdir" -name "$config" -print | while IFS= read -r i; do
+		case "$i" in
+		*EFI* | *efi* | *x86_64-efi*) continue ;;
+		esac
 		DO_WITH_DEBUG kexec-parse-boot.sh "$bootdir" "$i" >>"$option_file"
 	done
 	# FC29/30+ may use BLS format grub config files
 	# https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault
 	# only parse these if $option_file is still empty
 	if [ ! -s "$option_file" ] && [ -d "$bootdir/loader/entries" ]; then
-		for i in $(find "$bootdir" -name "$config"); do
+		find "$bootdir" -name "$config" -print | while IFS= read -r i; do
 			kexec-parse-bls.sh "$bootdir" "$i" "$bootdir/loader/entries" >>"$option_file"
 		done
 	fi