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[bug #48930] crash server crashes after --core-file-name is changed with

From: Kalle Olavi Niemitalo
Subject: [bug #48930] crash server crashes after --core-file-name is changed with fsysopts
Date: Sun, 28 Aug 2016 14:35:23 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0

Follow-up Comment #1, bug #48930 (project hurd):

I tried implementing (b) using pthread_rwlock_t.  It took about 15 lines of
code.  However, I noticed two more problems along the way:

1. --core-file-name can be set via fsysopts but it cannot be unset via
fsysopts.  Fixing this would require designing a command-line option for that
purpose, or perhaps --core-file-name= with an empty template should unset it.

2. If --core-file-name is set via fsysopts, and its argument is not a valid
template, then the crash server exits.  It should instead return an error to
the fsys_set_options RPC, like --action=GARBAGE does.  This is simply a bug
and can be fixed without further design.


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