[is] Add is_debug: Check whether system is running in debug mode

See $SLX_DEBUG in docs.

1 files changed, 26 insertions, 0 deletions

diff --git a/modules/is.inc b/modules/is.inc
index 17e8a0d..3d623b8 100644
--- a/modules/is.inc
+++ b/modules/is.inc
@@ -1,6 +1,32 @@
 #!/bin/ash
 
+# Check whether a value should be considered true/on. Checks for
+# 'on', 'yes', 'true', or 1, in either upper- or lowercase, but not
+# mixed case.
 is_on() {
 	[ "$1" = "ON" ] || [ "$1" = "on" ] || [ "$1" = "YES" ] || [ "$1" = "yes" ] || [ "$1" = "true" ] || [ "$1" = "TRUE" ] || [ "$1" -ne 0 ] 2>/dev/null || return 1
 	return 0
 }
+
+# Checks whether we're running bwLehrpool/OpenSLX in debug mode.
+# Either $SLX_DEBUG is_on, or 'debug' is passed on KCL.
+is_debug() {
+	if [ -z "$SLX_PXE_SERVER_IP" ]; then
+		if [ -s /opt/openslx/config ]; then
+			. /opt/openslx/config
+		elif [ -s /etc/openslx ]; then
+			. /etc/openslx
+		fi
+	fi
+	# Replace function for future calls as this is const
+	if is_on "$SLX_DEBUG" || grep -qE '\bdebug\b' "/proc/cmdline"; then
+		is_debug() {
+			return 0
+		}
+	else
+		is_debug() {
+			return 1
+		}
+	fi
+	is_debug
+}