[222] in Zephyr_Bugs
[geoff@ATHENA.MIT.EDU: decmips 7.1H: zwgc]
daemon@ATHENA.MIT.EDU (Jonathan I. Kamens)
Mon Jan 7 14:21:58 1991
Date: Mon, 7 Jan 91 14:21:38 -0500
From: "Jonathan I. Kamens" <jik@pit-manager.MIT.EDU>
To: bug-zephyr@ATHENA.MIT.EDU
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Return-Path: geoff@ATHENA.MIT.EDU
From: geoff@ATHENA.MIT.EDU
To: bugs@ATHENA.MIT.EDU
Subject: decmips 7.1H: zwgc
Date: Sun, 09 Sep 90 21:02:41 EDT
System name: hodge
Type and version: KN01 7.1H (1 update(s) to same version)
Display type: PM-MONO
What were you trying to do?
start zwgc in tty mode without DISPLAY set
What's wrong:
I typed "zwgc -ttymode &" (instead of "zwgc -ttymode") and
zwgc dumped core.
When DISPLAY is not set, ZSetLocation calls ttyname(0). If
zwgc is run in the background, then fd 0 has no tty,
and the call returns NULL. This is not checked, so the rindex
following dumps core.
What should have happened:
zwgc should have just run, without dumping core. Z_SendLocation()
should check the return value of ttyname, or call ttyname for fd 1.
Please describe any relevant documentation references:
It looks like backgrounding zwgc -ttymode makes zwgc dump core.
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