fake real information in display demo from running system

1 files changed, 60 insertions, 14 deletions

diff --git a/issues/display b/issues/display
index 6c16166..70f9dca 100755
--- a/issues/display
+++ b/issues/display
@@ -1,4 +1,13 @@
 #!/usr/bin/env bash
+
+MYTDIR="$(mktemp -d --tmpdir osissue.XXXXXX)" || exit 1
+MYPWD="$(cd "$(dirname "$0")" && pwd)" || exit 2
+function ctrl_c {
+	if [ ! -z "$MYTDIR" ]; then
+		rm -rf "$MYTDIR"
+	fi
+	exit 130
+}
 if [ -n "$1" ];then
 	FARR="$1"
 	if [ ! -e "$FARR" ];then FARR="$FARR.issue";fi
@@ -7,18 +16,55 @@ else
 	FARR=( $(ls *.issue) "issue.blank.1" "issue.blank.2" )
 	unset IFS
 fi
-for i in "${FARR[@]}";do
-	IFS=$'\n'
-	FLARR=( $(cat "$i") )
-	unset IFS
-	if [ -z "$COLUMNS" ];then
-		COLUMNS="$(tput cols)"
-		[ -z "$COLUMNS" ] && COLUMNS=20
+if [ -r "/etc/os-release" ]; then
+	source "/etc/os-release"
+fi
+if [ -n "$VARIABLE" ]; then
+	OSSTR_S="$VARIABLE"
+elif [ -n "$PRETTY_NAME" ]; then
+	OSSTR_S="$PRETTY_NAME"
+else
+	OSSTR_S="$(uname -o)"
+fi
+OSSTR_M="$(uname -m)"
+OSSTR_R="$(uname -r)"
+OSSTR_N="$(uname -n)"
+OSSTR_L="$(tty | sed 's#^/dev/##')"
+# see man:agetty(8), ... kinda: we don't have e.g. 4{IFACENAME} anywhere, so we only do the
+# argumentless variants
+OSSTR_4="$(ip -4 -o address show nomaster primary scope global up | head -n 1 | awk '{print $4}' | awk -F/ '{print $1}')"
+if [ -z "$OSSTR_4" ]; then
+	OSSTR_4="$(getent ahostsv4 "$(hostname -s)" | head -n1 | awk '{print $1}')"
+	if [ -z "$OSSTR_4" ]; then OSSTR_4="127.0.0.1"; fi
+fi
+OSSTR_6="$(ip -6 -o address show nomaster primary scope global up | head -n 1 | awk '{print $4}' | awk -F/ '{print $1}')"
+if [ -z "$OSSTR_6" ]; then
+	OSSTR_6="$(getent ahostsv6 "$(hostname -s)" | head -n1 | awk '{print $1}')"
+	if [ -z "$OSSTR_6" ]; then
+	# this could now be a number of reasons, we act as if IPv6 had been deactivated
+		OSSTR_6="::ffff:127.0.1.1"
 	fi
-	printf "\\033[;1m"
-	for ((j=0;j<$COLUMNS;++j)); do printf -- "-"; done
-	printf "\\n  %b\\n" "$i"
-	for ((j=0;j<$COLUMNS;++j)); do printf -- "-"; done
-	printf "\\033[0m\\n"
-	printf "%b\\n" "${FLARR[@]}"
-done
+fi
+(
+	cd "$MYPWD" || exit 10
+	for issuefile in "${FARR[@]}";do
+		cp -p "$issuefile" "${MYTDIR}/" || break
+		sed -i "s#\\\\S#$OSSTR_S#;s#\\\\m#$OSSTR_M#;s#\\\\l#$OSSTR_L#" "${MYTDIR}/${issuefile}" &&\
+		sed -i "s#\\\\4#$OSSTR_4#;s#\\\\6#$OSSTR_6#" "${MYTDIR}/${issuefile}" &&\
+		sed -i "s#\\\\r#$OSSTR_R#;s#\\\\n#$OSSTR_N#" "${MYTDIR}/${issuefile}" || break
+		IFS=$'\n'
+		FLARR=( $(cat "${MYTDIR}/${issuefile}") )
+		unset IFS
+		if [ -z "$COLUMNS" ];then
+			COLUMNS="$(tput cols)"
+			[ -z "$COLUMNS" ] && COLUMNS=20
+		fi
+		printf "\\033[;1m"
+		for ((j=0;j<$COLUMNS;++j)); do printf -- "-"; done
+		printf "\\n  %b\\n" "$issuefile"
+		for ((j=0;j<$COLUMNS;++j)); do printf -- "-"; done
+		printf "\\033[0m\\n"
+		printf "%b\\n" "${FLARR[@]}"
+	done
+)
+rm -rf "$MYTDIR"