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- From: rjackson@gmuvax2.gmu.edu (Richard L Jackson Jr)
- Newsgroups: comp.unix.shell
- Subject: csh/ksh comparison summary. Thanks!
- Message-ID: <1992Jul24.142605.16455@gmuvax2.gmu.edu>
- Date: 24 Jul 92 14:26:05 GMT
- Sender: rjackson@gmuvax2.gmu.edu (Richard L Jackson Jr)
- Organization: George Mason University, Fairfax, Va.
- Lines: 68
-
- Thank you for your responses on my 'csh/ksh comparison questions? This
- group has been the most responsive of all other groups I have delt with.
- I am including a summary of responses to my three questions. One point
- seemed to be clear; use a more advanced interactive shell (e.g., bash, zsh,
- tcsh). The following are people kind enough to offer a response. Please
- excuse me if I accidentally left your name out.
-
- Tim Shelling (tim@mal-s1.gatech.edu)
- Colum Mylod (cmylod@nl.oracle.com)
- James Yorton (yorton@turtle11.rtsg.mot.com)
- Dave Anderson (dla@westford.ccur.com)
- Bob Halloran (rkh@d1.att.com)
- Mike O'Connor (mjo@fmsr17.srl.ford.com)
- David Wagner (dawagner@phoenix.Princeton.edu)
-
- A summary/collection of responsives follows:
-
- In article <1992Jul21.183727.20364@gmuvax2.gmu.edu>, rjackson@gmuvax2.gmu.edu (Richard L Jackson Jr) writes:
- |> I did a simple comparison of CSH and KSH. I am asking this
- |> group for solutions to csh feature that ksh appears to lack.
- |> I am using ULTRIX 4.1, VAX 8530.
- |>
- |> 1) set filec or file completion
-
- In ksh, using vi-style command line editing, try
-
- <ESC>* or <ESC>\
-
- where <ESC> is the ESCAPE key.
- There is a slight difference. I'm not a tcsh user, but users tell
- me that <ESC>\ is quite similar to tcsh's file name completion.
-
- In ksh, using emacs-style command line editing, try
-
- <ESC><ESC>
-
- |>
- |> 2) concurrent sessions inadvertently use the same history
- |> file. Appending a pid to the history file at login may help
- |> but there is no logout facility to remove the file.
- |>
-
- How about using a different history file for each tty?
- How about something like:
-
- tty=`tty`
- export HISTFILE=~/.history_${tty#/dev/}
-
- I suggest you clean up the history files periodically, or you
- may have a lot of them laying around. It's like politics,
- some people want it one way, some the other. Neither is wrong.
-
- I use the same history file name (".sh_history"), but explicitly remove
- it in my .profile just prior kicking off my .kshrc. This unlinks any
- visible versions of ".sh_history" -- however the "removed" versions are
- still available to the previous invocation(s) of ksh (as temporary files).
-
- |> 3) how does one invoke a .logout script at ksh exit?
- |>
-
- How about putting this at the top of your .profile:
-
- trap '[[ -x ~/.logout ]] && ~/.logout' 0 1 15
-
- which will execute your .logout script (if it's executable)
- on the receipt of certain signals. Do a chmod +x ~/.logout too.
- You can then put anything in .logout, including removal of
- your history files.
-