From ffa7aac0a1618b5040e853f9def26cfeab011a27 Mon Sep 17 00:00:00 2001
From: xdrm-brackets <doowap31@gmail.com>
Date: Sat, 27 Jan 2018 18:57:57 +0100
Subject: [PATCH] First commit: all works but problem with 'sync' have to wait
 2sec...

---
 launch  | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 read    |  16 +++++++++
 trigger |  10 ++++++
 write   |  13 ++++++++
 4 files changed, 141 insertions(+)
 create mode 100755 launch
 create mode 100755 read
 create mode 100755 trigger
 create mode 100755 write

diff --git a/launch b/launch
new file mode 100755
index 0000000..c14a0a0
--- /dev/null
+++ b/launch
@@ -0,0 +1,102 @@
+#!/bin/bash
+
+
+# (1) Primary setup
+#--------------------------------------------------------#
+# (1) Get current ABS directory
+ROOT=$(dirname `realpath $0`);
+
+# (2) Check required arguments
+test $# -lt 4 && echo -e "ERR: Missing arguments\n\nARGUMENTS:\n\tname\t\tThe name of the machine\n\ttarget_host\tThe hostname (or ip) of the target\n\tout_port\tThe port you want to use to send\n\tin_port\t\tThe port the peer uses to listen\n\ttrigger_port\tOptional param. Used to trigger the peer connection\n" && exit 1;
+
+# (3) Manage optional param #
+TRIGGER="";
+test $# -ge 5 && TRIGGER="$5";
+
+
+# (2) Secondary setup
+#--------------------------------------------------------#
+# (1) Reset configuration file
+test -f $ROOT/config && rm $ROOT/config;
+
+# (2) Create buffer paths
+BUF_IN="/tmp/buf_in_$4";
+BUF_OUT="/tmp/buf_out_$2_$3";
+
+# (3) Flush buffers
+echo -ne "" > $BUF_IN;
+echo -ne "" > $BUF_OUT;
+
+
+# (3) Launch INPUT server
+#--------------------------------------------------------#
+# (1) Start the script in background
+(
+
+	infail=0;
+
+	# kill script after 10 failures
+	while [ $infail -lt 10 ]; do
+
+		# main command
+		nc -lp $4 >> $BUF_IN && infail=0 || infail=`expr $infail + 1`;
+
+		# try to kill proccess that uses port if failed and such proccess exists
+		if [ $infail -gt 0 ]; then
+			LISTEN_PID=`lsof -n -i4TCP:$4 | grep LISTEN | awk '{print $2}'`;
+			test -z "$LISTEN_PID" && kill -9 $LISTEN_PID;
+		fi;
+
+	done;
+
+)&
+
+# (2) Store the background proccess PID #
+IN_PID=$!;
+
+
+
+
+
+################################
+# IF SET, SEND TRIGGER TO PEER #
+################################
+test ! -z "$TRIGGER" && bash -c "exec 3<>/dev/tcp/$2/$TRIGGER";
+
+##################################
+# WAIT 2s FOR THE PEER TO LISTEN #
+##################################
+sleep 2;
+
+
+
+
+
+# (4) Launch OUTPUT server
+#--------------------------------------------------------#
+# (1) Launch output server
+(
+
+	outfail=0;
+
+	# stop after 20 failed attempts
+	while [ $outfail -lt 20 ]; do
+
+		# main command
+		tail -f $BUF_OUT | nc $2 $3 && outfail=0 || outfail=`expr $outfail + 1`;
+
+		sleep 1; # can sleep because the buffer is never flushed
+
+	done&
+
+)&
+
+# (2) Store the background proccess PID #
+OUT_PID=$!;
+
+
+
+# (5) Store the config file for 'write' + 'send' to work properly
+#--------------------------------------------------------#
+# (1) Store config file in 'config_$NAME'
+echo -e "#!/bin/bash\nBUF_IN=\"$BUF_IN\"; BUF_OUT=\"$BUF_OUT\";\nIN_PID=$IN_PID; OUT_PID=$OUT_PID;\n" > $ROOT/config_$1;
diff --git a/read b/read
new file mode 100755
index 0000000..05066c8
--- /dev/null
+++ b/read
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# (0) Get current ABS directory
+ROOT=$(dirname `realpath $0`);
+
+# (1) Check arguments
+test $# -lt 1 && echo "ERR: Missing arguments (name)" && exit 1;
+
+# (2) load configuration file
+test -f $ROOT/config_$1 && source $ROOT/config_$1 || ( echo "ERR: No such name" && exit 1 ) || exit 1;
+
+# (3) Read content from file
+cat $BUF_IN;
+
+# (4) Flush buffer
+echo -ne "" > $BUF_IN;
diff --git a/trigger b/trigger
new file mode 100755
index 0000000..c4ff82b
--- /dev/null
+++ b/trigger
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# (0) Get current ABS directory
+ROOT=$(dirname `realpath $0`);
+
+# (1) Check arguments
+test $# -lt 1 && echo "ERR: Missing arguments (trigger_port)" && exit 1;
+
+# (2) Wait for triggering by peer
+nc -lp $1;
diff --git a/write b/write
new file mode 100755
index 0000000..e6c542b
--- /dev/null
+++ b/write
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# (0) Get current ABS directory
+ROOT=$(dirname `realpath $0`);
+
+# (1) Check arguments
+test $# -lt 2 && echo "ERR: Missing arguments (name, message)" && exit 1;
+
+# (2) load configuration file
+test -f $ROOT/config_$1 && source $ROOT/config_$1 || ( echo "ERR: No such name" && exit 1 ) || exit 1;
+
+# (3) Write content to file
+echo -ne "$2" >> $BUF_OUT;