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From:	"D. Boland" <daniel AT boland DOT nl>
Subject:	Cygrunsrv crashes when setting STDERR to /dev/null
Date:	Sun, 02 Mar 2014 14:58:53 +0100
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Message-ID:	<5313391D.580E9785@boland.nl>
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Hi group,

I have Apache running via cygrunsrv on a WinXP system. It works fine. Apache can
even do a setuid on startup, so a 'ps -ef' looks like this:

     UID     PID    PPID  TTY        STIME COMMAND
   httpd    1604    1308 ?        14:26:47 /usr/local/apache/bin/httpd
  SYSTEM    1308    1400 ?        14:26:47 /usr/local/apache/bin/httpd
   httpd     896    1308 ?        14:26:47 /usr/local/apache/bin/httpd
   httpd     536    1308 ?        14:26:47 /usr/local/apache/bin/httpd
   httpd     612    1308 ?        14:26:47 /usr/local/apache/bin/httpd
   httpd     560    1308 ?        14:26:47 /usr/local/apache/bin/httpd

As you can see, I have it running as 'httpd', an unprivileged user, which I created
without password and removed from the 'Users' group, so it cannot login.

Unfortunately, this doesn't work on a Win7 system. If I try the same configuration
in a Win7 system, the following message is logged in logs/error_log and the Service
won't start:

[alert] (1)Operation not permitted: setuid: unable to change to uid: 1006

So, I set a password for the 'httpd' user and configured the Service to log on as
that user. This works, but now I cannot use cygrunsrv's -1 or -2 switches for
redirecting STDOUT and STDERR anymore.

cygrunsrv crashes if I set either one of them to /dev/null. If I unset them, it
works.

Can anybody help?

Daniel


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