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# Re: reading from pipes fails if working directory is on a removable drive

• From: Marco Atzeri <marco dot atzeri at gmail dot com>
• To: cygwin at cygwin dot com
• Date: Thu, 28 Apr 2016 23:23:10 +0200
• Subject: Re: reading from pipes fails if working directory is on a removable drive
• Authentication-results: sourceware.org; auth=none
• References: <3429db07-294c-a42a-f131-45016ecf5af9 at mihau dot de>

```On 28/04/2016 23:16, mihau wrote:
```
```hello,

came across this today on a fresh (2 days old) installation of cygwin x86

- MapViewOfFileEx '(null)'(0x5DC), Win32 error 6.  Terminating.
Segmentation fault

reading from pipes works fine if working directory is a local drive or a
UNC path,
but this happens if the working directory is removable drive. I tried
with/on various
devices and it happens on all removable drives, regardless of the
filesystem (NTFS or FAT32)

also, 'head' is just an example; the same error comes up when trying to
use grep,
sed or gawk (haven't tested with others yet).

does anybody know what could be causing this?

thank you,
Michael

```
```
My cygwin is on a removable drive so your experience
is not normal.

I guess some BLODA.

As suggested on
https://cygwin.com/problems.html

```
"Run cygcheck -s -v -r > cygcheck.out and include that file as an attachment in your report. Please do not compress or otherwise encode the output. Just attach it as a straight text file so that it can be easily viewed. "
```
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