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Date: Wed, 9 Oct 1996 10:38:03 -0400 (EDT)
From: Christopher Masto <exidor@superior.net>
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Subject: kern/1751: system("emacs") shows signal handling problem
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>Number:         1751
>Category:       kern
>Synopsis:       system() call appears to be broken re: signal handling
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct  9 07:40:01 PDT 1996
>Last-Modified:
>Originator:     Christopher Masto
>Organization:
Superior Net
>Release:        FreeBSD 2.1.0-RELEASE i386
>Environment:

Any environment.

>Description:

Several programs which spawn an editor (trn, elm, etc.) seemed to have
a problem when using emacs as the editor.  Pressing C-g (abort) in
emacs caused the program to re-take control of the tty, with emacs
still running but unusable.  This problem was also mentioned in
bin/1206 as a bug in '/bin/sh -c emacs'.  It turns out that it isn't
/bin/sh at all, but in fact anything that uses the system() call.

>How-To-Repeat:

Compile and run the following:

main()
{ system("emacs -nw") }

When emacs starts, press C-g.  It will dump you back to the shell, usually
with the terminal modes screwed up, and emacs will still show up in a 'ps'.
(And it will occasionally write "garbage collecting" to the terminal)

>Fix:
	
	

>Audit-Trail:
>Unformatted: