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From: "lhall AT pop DOT ma DOT ultranet DOT com" <lhall AT pop DOT ma DOT ultranet DOT com>
To: mark DOT madsen AT divine DOT com, cygwin AT cygwin DOT com
Subject: RE: starting a CYGWIN app from a Windows Service
Date: Thu, 17 Oct 2002 09:58:21 -0400
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You'll probably want to check out the user's guide on this.  mounts only 
come into play if you don't specify a mode to read and write in explicitly.
"user" mounts apply to a particular user.  "system" mounts apply to any
user.
The mode specified by a mount will only be consulted if the mode of the file
has not been explicitly set.  There's quite a bit more to say about mounts,
file modes, and how they can be set.  The User's Guide has some good 
information on it.  The email list archives hit on various specific topics,
questions, rants, and issues.  You can check either of these for more
details
if you need more data points to flesh out your overall understanding of 
file modes in Cygwin.

Larry


Original Message:
-----------------
From: Madsen, Mark Mark DOT Madsen AT divine DOT com
Date: Thu, 17 Oct 2002 08:16:24 -0500
To: cygwin AT cygwin DOT com
Subject: RE: starting a CYGWIN app from a Windows Service


Thanks Dan. Using "rt" fixed the problem for the moment.

I will still need to understand exactly why there was a difference though.
CYGWIN is undefined in both circumstances. What I don't understand is the
"system" vs. "user" mount types. The file is on the local file system,
(C:/.../file.txt) so I don't know if that applies here.

-Mark


-----Original Message-----
From:	Dan Vasaru [mailto:dvasaru AT broadpark DOT no]
Sent:	Wed 10/16/2002 5:09 PM
To:	Madsen, Mark; cygwin AT cygwin DOT com
Cc:	
Subject:	RE: starting a CYGWIN app from a Windows Service
Mark,

As Chris suggested, if you want consistent behaviour under cygwin, always
open text files in text mode (O_TEXT or "rt").
Even better, wrt portability to Unix platforms, is to:

1. open the file in binary mode
2. be prepared to accept both CRLF- and LF-style text files (i.e. strip the
CR yourself)

This way, your software will always "behave" when encountering a Windows
file while running on a Unix platform.

Dan

PS. To explain the behaviour you're seeing you have to check 4 places:

value of the CYGWIN environment variable when running as a service
value of the CYGWIN environment variable when running as yourself
system mount types
user mount types

There's probably a difference in the mount mode or CYGWIN variable between
the 2 cases.

Dan

-----Original Message-----
From: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com]On Behalf
Of Madsen, Mark
Sent: Wednesday, October 16, 2002 11:21 PM
To: cygwin AT cygwin DOT com
Subject: starting a CYGWIN app from a Windows Service


When I run an application that uses the cygwin1.dll from either a Windows
Service and then from the command line I get different results when trying
to read a text file.

As a Windows Service:
I use fopen and fgets to read a DOS text file and the CR/LF combinations are
handled properly. Meaning that I only see the single LF.

Running from a DOS command line:
Using the exact same executable image as above, both characters are in the
buffer.

What I know:
Both instances use the very same DLL image. (I deleted it and both instances
complain about the DLL missing.)

Both instances are reading the exact same file, not two different copies.

I tried working with the CYGWIN environment variable with no effect on the
outcome.

Any help would be greatly appreciated.
Thanks,
Mark

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