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Reply-To:	Brian DOT Inglis AT SystematicSw DOT ab DOT ca
Subject:	Re: tar 1.29 hangs, when run with strace, it exits with "illegal instruction"
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From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
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Date:	Wed, 7 Aug 2019 21:33:17 -0600
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On 2019-08-07 12:20, Keith Christian wrote:
> I am able to run "tar ft somefile.tar" successfully on a Linux
> machine, same tar version (1.29.)
> 
> This version hangs up the terminal, does not respond to Ctrl-C or
> Ctrl-Z, and terminates with an illegal instruction to the screen, not
> reflected in the strace output.
> 
> File cygwin_tar_1_29_illegal_instruction.txt is attached with strace
> output, version, and "cygcheck tar" output.

Works just fine for me:

$ tar ft Downloads/nam.dist.tar
README
demo/
...

You may have some http://www.cygwin.com/acronyms/#BLODA interfering like an AV.
  The strace shows tar fails in sysfer.dll, which is part of Symantec Endpoint
Protection CMC Firewall Application and Device Control, badly written from the
number of complaints about it, and as usual with these control and monitoring
products, they greatly slow down systems and interfere with work.
Deinstall SEP or bypass your cygwin directories.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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