Bug 438550

Summary: screen doesn't work if SHELL=/bin/tcsh
Product: [Fedora] Fedora Reporter: Charles R. Anderson <cra>
Component: setupAssignee: Phil Knirsch <pknirsch>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: dcantrell, mlichvar, rvokal
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-04-07 17:35:21 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On:    
Bug Blocks: 235706    
Attachments:
Description Flags
strace tcsh none

Description Charles R. Anderson 2008-03-21 15:53:07 EDT
Description of problem:

Starting screen from a user whose shell is /bin/tcsh is unsuccessful in
launching tcsh in each screen window.  You can still open window, change
windows, detach, reattach, and exit, but no shells actually appear.

Version-Release number of selected component (if applicable):
screen-4.0.3-10.fc9.x86_64

How reproducible:
always

Steps to Reproduce:
1. useradd -s /bin/tcsh testuser
2. passwd testuser
3. login as testuser
4. screen
5. Ctrl-A n to create a new window.
6. Ctrl-A K in succession to kill each window until screen exits.

Actual results:

title bar:
[screen 0: tcsh]

empty screen window

Expected results:

a tcsh prompt

Additional info:

screen works fine if the login shell is bash
Comment 1 Charles R. Anderson 2008-03-21 15:59:32 EDT
Created attachment 298805 [details]
strace tcsh

If you start screen with bash, it works.  But then try to start tcsh inside
screen, and it hangs:

[cra@localhost ~]$ tcsh

Attached is the strace from this attempt:

[cra@localhost ~]$ strace -o tcsh-strace.txt tcsh
Comment 2 Miroslav Lichvar 2008-03-31 12:19:25 EDT
This is caused by prompt setting in /etc/csh.cshrc.
Comment 3 Jesse Keating 2008-04-03 23:55:22 EDT
(In reply to comment #2)
> This is caused by prompt setting in /etc/csh.cshrc.

Do you have a proposed fix for this?
Comment 4 Miroslav Lichvar 2008-04-04 09:00:56 EDT
--- setup-2.6.12/csh.cshrc.orig	2008-02-22 17:48:32.000000000 +0100
+++ setup-2.6.12/csh.cshrc	2008-04-04 14:57:50.000000000 +0200
@@ -40,7 +40,7 @@ if ($?TERM) then
       breaksw
     case screen:
       if ($?tcsh) then
-	set prompt='%{\033_%n@%m:%c\033%}[%n@%m %c]%# '
+	set prompt='%{\033_%n@%m:%c\033\\%}[%n@%m %c]%# '
       else
 	alias precmd 'echo -n "\033_${USER}@${HOSTNAME}:${PWD}"; echo -n "\033\\"'
       endif

Comment 5 Phil Knirsch 2008-04-04 10:05:43 EDT
Ugh, mye, my bad. I'll build a new package today that fixes this (among a few
other things).

Thanks for the fix, Miroslav.

Read ya, Phil