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July 2002, Week 1

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Subject:
Re: O_EXCL|O_CREAT in open() of HPC/iX library
From:
Ken Hirsch <[log in to unmask]>
Reply To:
Ken Hirsch <[log in to unmask]>
Date:
Mon, 1 Jul 2002 17:35:28 -0400
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> The O_EXCL option for open() doesn't seem to appear in the
> HPC/iX Library Reference Manual (E1092) for some reason, though it's
defined
> in FCNTL.H.SYS if _POSIX_SOURCE is defined.

Have you tried it to see if it works?  Or are you worried that it's not
atomic?

> It seems the only way to get the behavior I need is to use HPFOPEN() with
a
> domain of 4 ["new permanent file"] but I don't see any way to turn the MPE
> file number into a FILE* stream.

You should be able to
  fdopen(_POSIX_FILENO(fnum), "a")
although I haven't tried it.

Ken Hirsch

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