Screen init script

screen_init.sh

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+#!/bin/bash
+
+# AUTHOR: Clemens Schwaighofer
+# DATE: 2015/8/4
+# DESC: inits a screen with shells (sets titles) and runs command in those shells
+#       reads all data from a config file
+#
+# open the screen config file
+# - first line is the screen name
+# - second line on are the screens + commands
+# - a line is title#command
+# - command can be empty, just creates a screen then
+# - title can be empty, but not recommended
+# - no hash is allowed in title or command
+
+# EXAMPLE:
+# ===========================
+# FooScreen
+# TitleA#cd ~/Folder
+# TitleB#vim file
+# TitleC#
+# TitleD#ping foo.bar.com
+# ===========================
+
+set -e
+
+ERROR=0;
+if [ ! -f "$1" ];
+then
+	echo "Cannot find screen init config file '$1'";
+	ERROR=1;
+else
+	# get the first line for the screen name
+	SCREEN_NAME=$(head -n 1 "$1");
+fi;
+
+# check if we are in a screen one, if yes, exit
+if [ -z "$STY" ];
+then
+	# check if the "work" screen exists
+	if [ ! -z "$SCREEN_NAME" ] && [[ ! -z $(screen -ls | grep ".$SCREEN_NAME\t") ]];
+	then
+		echo "Screen '$SCREEN_NAME' already exists";
+		ERROR=1;
+	fi;
+else
+	echo "Cannot run screen init script in a screen";
+	ERROR=1;
+fi;
+
+if [ $ERROR -eq 1 ];
+then
+	exit;
+fi;
+
+# termcap (echo $TERMCAP)
+# http://web.mit.edu/gnu/doc/html/screen_15.html#SEC89
+# in screen ^-a . to dump current termcap
+export SCREENCAP="SC|screen.xterm-256color|VT 100/ANSI X3.64 virtual terminal:\
+:DO=\E[%dB:LE=\E[%dD:RI=\E[%dC:UP=\E[%dA:bs:bt=\E[Z:\
+:cd=\E[J:ce=\E[K:cl=\E[H\E[J:cm=\E[%i%d;%dH:ct=\E[3g:\
+:do=^J:nd=\E[C:pt:rc=\E8:rs=\Ec:sc=\E7:st=\EH:up=\EM:\
+:le=^H:bl=^G:cr=^M:it#8:ho=\E[H:nw=\EE:ta=^I:is=\E)0:\
+:li#92:co#228:am:xn:xv:LP:sr=\EM:al=\E[L:AL=\E[%dL:\
+:cs=\E[%i%d;%dr:dl=\E[M:DL=\E[%dM:dc=\E[P:DC=\E[%dP:\
+:im=\E[4h:ei=\E[4l:mi:IC=\E[%d@:ks=\E[?1h\E=:\
+:ke=\E[?1l\E>:vi=\E[?25l:ve=\E[34h\E[?25h:vs=\E[34l:\
+:ti=\E[?1049h:te=\E[?1049l:us=\E[4m:ue=\E[24m:so=\E[3m:\
+:se=\E[23m:mb=\E[5m:md=\E[1m:mh=\E[2m:mr=\E[7m:me=\E[m:\
+:ms:Co#8:pa#64:AF=\E[3%dm:AB=\E[4%dm:op=\E[39;49m:AX:\
+:vb=\Eg:G0:as=\E(0:ae=\E(B:\
+:ac=\140\140aaffggjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~..--++,,hhII00:\
+:po=\E[5i:pf=\E[4i:Km=\E[M:k0=\E[10~:k1=\EOP:k2=\EOQ:\
+:k3=\EOR:k4=\EOS:k5=\E[15~:k6=\E[17~:k7=\E[18~:\
+:k8=\E[19~:k9=\E[20~:k;=\E[21~:F1=\E[23~:F2=\E[24~:\
+:kB=\E[Z:kh=\E[1~:@1=\E[1~:kH=\E[4~:@7=\E[4~:kN=\E[6~:\
+:kP=\E[5~:kI=\E[2~:kD=\E[3~:ku=\EOA:kd=\EOB:kr=\EOC:\
+:kl=\EOD:km:";
+
+# read the config file and init the screen
+pos=0;
+cat "$1" |
+while read line;
+do
+	if [ $pos -eq 0 ];
+	then
+		# should I clean the title to alphanumeric? (well yes, but not now)
+		SCREEN_NAME=$line;
+		# check that we do not create double entries
+		if screen -list | grep -q "${SCREEN_NAME}"; then
+			echo "Screen with ${SCREEN_NAME} already exists";
+			exit;
+		fi;
+	else
+		# extract screen title and command (should also be cleaned for title)
+		SCREEN_TITLE=$(echo "$line" | cut -d "#" -f 1);
+		SCREEN_CMD=$(echo "$line" | cut -d "#" -f 2);
+		# screen number is pos - 1
+		SCREEN_POS=$[ $pos-1 ];
+		# for the first screen, we need to init the screen and only set title
+		# for the rest we set a new screen with title
+		if [ $pos -eq 1 ];
+		then
+			echo "Init screen with title '$SCREEN_NAME'";
+			screen -dmS "$SCREEN_NAME";
+			# set title for the first
+			screen -r "$SCREEN_NAME" -p $SCREEN_POS -X title "$SCREEN_TITLE";
+		else
+			screen -r "$SCREEN_NAME" -X screen -t "$SCREEN_TITLE" $SCREEN_POS;
+		fi;
+		echo "[$SCREEN_POS] Set title to '$SCREEN_TITLE'";
+		# run command on it (if there is one)
+		if [ ! -z "$SCREEN_CMD" ];
+		then
+			echo "[$SCREEN_POS] Run command '$SCREEN_CMD'";
+			# if ^M is garbled: in vim do: i, ^V, ENTER, ESCAPE
+			screen -r "$SCREEN_NAME" -p $SCREEN_POS -X stuff $"$SCREEN_CMD^M";
+		fi;
+	fi;
+	pos=$[ $pos+1 ];
+done;