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Subject: [Bug libfortran/30162] [4.7/4.8 Regression] I/O with named pipes does not work
Date: Sun, 23 Dec 2012 15:10:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30162

--- Comment #41 from tkoenig at netcologne dot de <tkoenig at netcologne dot de> 2012-12-23 15:09:59 UTC ---
Am 23.12.2012 15:16, schrieb dominiq at lps dot ens.fr:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30162
>
> --- Comment #40 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2012-12-23 14:16:52 UTC ---
>> Unfortunately, I cannot really debug this without access to a machine
>> where it fails.
>
> Would it be possible to write a simple C test that can be run on the different
> platforms in order to check the behavior of lseek?

The tests that you ran with the patchlet show that the error is not
in setting errno on the lseek.  It has to be somewhere else.

If you still have the time, could you attach the truss output of

program main
   open (10,file="pipe",status="old")
   write (10,'(A)') 'Hello, world!'
end program main

where pipe is a FIFO, and the same for

program read
   character(len=100) c
   open (10,file="pipe", status="old")
   read (10,'(A)') c
   print *,trim(c)
end program read

(first starting read, then write).