tmux support for Linux

**tmux Support for Linux**

The `run` script with `cos_117.cfg` spawns xterms for consoles, which works well on desktops but not on VPS/servers without X forwarding or for users preferring SSH/shell/mosh.

To resolve, this commit adds tmux support via:

+ run_tmux - Script that manages a cray simulator session.
+ cos_117_tmux.cfg - Modified config that spawns tmux windows instead of xterms.

Benefits:

- Organizes cray simulator and consoles as tmux windows in a tmux session.
- Allows attaching, detaching, and exiting without stopping the simulator.
- Console windows can be scripted to pass input / output for development.

Usage:

```
run_tmux start
run_tmux attach
or execute `run_tmux` and select from menu.
```

Full Usage:
```
Usage: run_tmux {start|stop|restart|kill|attach|status}

start - Start the Cray simulator session
stop - Stop the Cray simulator session
restart - Restart the Cray simulator session
kill - Kill the Cray simulator session (unsafe)
attach - Attach to the Cray simulator session
status - List running Cray simulator and consoles

Use keys 'Ctrl b <0 to ...>' to move to specific windows
Use keys 'Ctrl b n' to move to the next window
Use keys 'Ctrl b p' to move to the previous window
Use keys 'Ctrl b d' to detach from the simulator session.
```

Tests:

- The script was checked in shellcheck with minimal issues detected.
- Tested on Ubuntu 22.04.3 LTS (aarch64)
- Tested on Arch Linux (x86_64)

cos_117_tmux.cfg

@@ -169,7 +169,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 040
 						TOChannelIdx 041
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -179,7 +179,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 042
 						TOChannelIdx 043
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -189,7 +189,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 044
 						TOChannelIdx 045
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -199,7 +199,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 046
 						TOChannelIdx 047
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -275,7 +275,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 042
 						TOChannelIdx 043
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -297,7 +297,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 042
 						TOChannelIdx 043
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes
@@ -441,7 +441,7 @@ IopClusters {
 					Console {
 						TIChannelIdx 042
 						TOChannelIdx 043
-						NewTerminalCommand          "tmux new-window -d -t cray -n cray_{port} '{cmd}'&"
+						NewTerminalCommand          "tmux new-session -d -s cray_{port} -n cray_{port} '{cmd}'&"
 						ConsoleCommandLinux         "telnet {host} {port}"
 						ConsoleCommandWindows       "putty.exe  -load Unicos -telnet  -P {port} {host}"
 						MapBackspace                yes

run_tmux

@@ -1,7 +1,6 @@
 #!/bin/sh
 PATH=$PATH:simulator/_bin/linux_release
 
-# Usage message
 usage() {
 cat << EOF
 
@@ -53,8 +52,10 @@ cray_is_up() {
 start_cray() {
     if cray_is_up; then msg "running"; else
         mkdir -p dump disk tape
-        tmux new-session -d -s cray
+        tmux new-session -d -s cray 
-        #space for future tmux hooks here
+        # Simplify the hooks, they could be error prone 
+        tmux set-hook -t cray -g session-created 'run-shell "tmux list-sessions -F '#{session_name}' | grep '^cray_' | sort | while read -r session; do tmux move-window -s $session:0 -t cray:; done; tmux move-window -s cray:$(tmux list-windows -t cray | grep -n 'cray_sim' | cut -d: -f1) -t cray:0"'
+        tmux set-hook -t cray -g window-linked 'run-shell "tmux list-windows -t cray -F \"#{window_index}\" | awk '\''$1 != \"0\" {print \"tmux rename-window -t \" $1 \" console_\" NR-1}'\'' | bash"'
         tmux send-keys -t cray 'cray_sim cos_117_tmux.cfg' C-m
         msg "started"
         help
@@ -96,7 +97,6 @@ restart_cray() {
 # Attach to the cray simulator session
 attach_cray() { if cray_is_up; then tmux attach-session -t cray; else msg "not_up"; fi }
 
-
 # Display status of cray simulator session and consoles
 status_cray() {
     if cray_is_up; then