Differences

This shows you the differences between two versions of the page.

--- docs:tips_n_tricks:screen.html [25.06.2010 17:05 CEST] – peter
+++ docs:tips_n_tricks:screen.html [16.03.2024 00:38 CET] (current) – [Logging and reading logs] peter
@@ Line 2: / Line 2: @@
 ===== show current directory or command in window name when using zsh =====
+==== Linux ====
 put this in your ''.zshrc''
@@ Line 11: / Line 11: @@
       precmd () {
               let "len = 54 - ${#DISPLAY}"
-              screen -X -S "$PPID" title "$DISPLAY - `pwd|sed -e 's:^.*\(.\{'$len'\}\)$:..\1:g'`"
+              screen -X -S "$PPID" title "$DISPLAY - `pwd|sed -e 's:^.*\(.\{'$len'\}\)$:..\1:g'` ($_my_last_cmd)"
       }
       preexec () {
               screen -X -S "$PPID" title "$DISPLAY - running: $1"
+              _my_last_cmd="$1"
               # # Maybe $2 or $3 is a better choice - I didn't get the difference yet. You may
               # # analyse this with the statement:
@@ Line 21: / Line 22: @@
       ;;
   esac
+==== Mac OS X ====
+On Mac OS X (maybe on BSD systems in general), screen launches a ''login'' process which then executes the shell. Therefore, the id of the screen session (''$STY'') does not start with the parent processes pid (''$PPID''), but with the parent pid of the parent process. Therefor, you have to
+use the following lines in your ''.zshrc''
+  case "`ps -o 'command=' -p $PPID`" in
+  "login"*"zsh") pppid="`ps -o 'ppid=' -p $PPID|sed -e 's/^ *//g'`" ;;
+  *)        pppid="XXX" ;;
+  esac
+  case "$STY" in
+    "")
+      ;;
+    "$pppid"*)
+      eval "
+      precmd () {
+              let \"len = 54 - \$#DISPLAY\"
+            screen -X -S "$STY" title \"\$DISPLAY - \`pwd|sed -e 's:^.*\(.\{'\$len'\}\)\$:..\1:g'\`\"
+      }
+      preexec () {
+              screen -X -S \"$STY\" title \"\$DISPLAY - running: \$1\"
+      }
+  "
+      ;;
+  esac
 ===== show current directory or command in window name when using bash =====
@@ Line 44: / Line 70: @@
         PROMPT_COMMAND='precmd'
         screentitle() { preexec "$BASH_COMMAND"; }
-        trap screentitle DEBUG
+        # # nice try :-/
+        # trap screentitle DEBUG
+        on_debug()
+        {
+          case "$BASH_COMMAND" in
+          "$PROMPT_COMMAND") ;;
+          *) preexec "$BASH_COMMAND" >> /dev/tty < /dev/null 2>&1 & disown ;;
+          esac
+        }
+        trap on_debug DEBUG
       fi
+      # as we show user and cwd in screen title,
+      # clear hardstatus in screen:
+      echo -en "\033]0;\007"
       ;;
   esac
+This seems to break some Pipe chains. There might be a better approach at [[http://www.twistedmatrix.com/users/glyph/preexec.bash.txt|at twistedmatrix]] where the idea to use "''trap'' ... ''DEBUG''" was stolen from ;-)
+Actually, I consider this trick dirty and hence both solutions.
+===== Have a separate history for each screen window =====
+Put this in your ''.profile'', ''.bashrc'', ''.zshenv'' or whatever shell your're using:
+  [ -n "$WINDOW" ] && HISTFILE="${HISTFILE:-~/.screen_history}.${WINDOW}"
 ===== sample .screenrc file =====
-  #remove some stupid / dangerous key bindings
+<code screen .screenrc>
-  bind ^k
+#remove some stupid / dangerous key bindings
-  bind ^\
+bind ^k
-  bind k
+bind ^\
-  startup_message off
+bind k
-  vbell on
+# # don't lock screen accidently - use if you don't know the accounts
-  vbell_msg " Klingeling! "
+# # password (e.g. when access is managed by ssh keys)
-  bindkey -k kb stuff ^?
+# bind x
-  defscrollback 500
+# bind ^x
+startup_message off
-  caption always
+vbell on
-  caption string "%?%F%{.c.}%?%3n %t%? [%h]%?"
+vbell_msg " Klingeling! "
-  # caption string "%?%F%{.c.}%?%3n %?[%h]%:%t%?"
+bindkey -k kb stuff ^?
-  windowlist string  "%3n %t %?[%h]%?"
+# Enable cycling backward throug regions in Putty by C-a,Shift+TAB
-  hardstatus on
+bindkey -t "^A^[[Z" focus prev
-  hardstatus alwayslastline
+# Make C-a C-a work smooth again
-  msgminwait 0
+bindkey -t "^A^A" other
+defscrollback 500
+# make $HOME the base for all relative paths
+chdir
+caption always
+# # show window title and optional
+# # hardware status line text
+# caption string "%?%F%{.c.}%?%3n %t%? [%h]%?"
+# # show window title if set, else hardware status line text
+# windowlist string "%3n %?[%h]%:%t%?"
+# windowlist title "Num Name|HW Status"
+# # show window title and hardware status line text if set
+# windowlist string "%3n %t %?[%h]%?"
+# windowlist title "Num Name [HW Status]"
+# # Use approximately original windowlist string appended by hardware statusline if set
+windowlist string "%3n %t%=%?[%h]    %:%?%f "
+windowlist title "Num Name%=[HW Status] Flags"
+# # show clock in caption line
+# caption    string "%?%F%{.b.}%H: %?%3n%? [%h]%: %t%?%=| %c:%s "
+# Higlight active window, show hold and escape-key state
+caption    string "%?%F%{.bw}%?%H: %3n%?%E %{.rw}~a~%{-}%?%?%P %{.wb}~HOLD~%{-}%?%? [%h]%: %t%?%-11=| %c:%s "
+hardstatus on
+hardstatus alwayslastline
+msgminwait 0
+logfile .screenlog/screen.%S.%n.%Y-%m-%d.%0c.log
+zombie xr onerror
+# If you're using bash (won't hurt otherwise)
+setenv PROMPT_COMMAND 'screen -p "$WINDOW" -X title "$PWD"'
+</code>
+===== Logging and reading logs =====
+<code screenrc .screenrc>
+:
+chdir
+logfile screenlog/screen.%S.%n.%Y-%m-%d.%0c.log
+:
+</code>
+  col < ~/screenlog/screen.pts-0.www.14.2021-09-06.09:28.log | less
+__References__:
+  * [[https://superuser.com/questions/236930/how-to-clean-up-output-of-linux-script-command|How to clean up output of linux 'script' command]]
+===== Starting root shell in new screen with non-default shell =====
+  screen -t root sudo ZDOTDIR=$HOME -i /bin/zsh -
+  screen -t root sudo su - -c "ZDOTDIR=$HOME exec zsh"