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Groups > comp.lang.c > #9838

Re: fflush

From sandeep <nospam@nospam.com>
Newsgroups comp.lang.c
Subject Re: fflush
Date 2011-09-01 20:49 +0000
Organization Aioe.org NNTP Server
Message-ID <j3or4k$b8u$1@speranza.aioe.org> (permalink)
References <4e5fe3b1$0$27973$bbae4d71@news.suddenlink.net> <j3opkm$649$1@reader1.panix.com>

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John Gordon writes:
> In <4e5fe3b1$0$27973$bbae4d71@news.suddenlink.net> "Bill Cunningham"
> <nospam@nspam.invalid> writes:
> 
>>     Where is the right place to put fflush in a file IO operation?
>>     Right
>> before fclose? I never have really used it to flush buffers only to
>> flush stdout. Is it a good idea to use fflush all the time?
> 
> Closing the file automatically flushes the output, so calling fflush
> right before closing the file won't accomplish anything.
> 
> Fflush is typically used when you want to ensure that some output gets
> written to the file RIGHT NOW but aren't ready to close the file yet.

In my experience, fflush() is most typically used on input streams, 
however this is technically an undefined behavior.

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Thread

fflush "Bill Cunningham" <nospam@nspam.invalid> - 2011-09-01 15:57 -0400
  Re: fflush Willem <willem@toad.stack.nl> - 2011-09-01 20:09 +0000
  Re: fflush John Gordon <gordon@panix.com> - 2011-09-01 20:23 +0000
    Re: fflush sandeep <nospam@nospam.com> - 2011-09-01 20:49 +0000
      Re: fflush Kenneth Brody <kenbrody@spamcop.net> - 2011-09-02 10:59 -0400
    Re: fflush Kleuskes & Moos <kleuske@somewhere.else.net> - 2011-09-01 22:06 +0000
      Re: fflush Kenneth Brody <kenbrody@spamcop.net> - 2011-09-02 11:05 -0400
        Re: fflush Kleuskes & Moos <kleuske@somewhere.else.net> - 2011-09-02 17:04 +0000
  Re: fflush Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-01 14:55 -0600
  Re: fflush pete <pfiland@mindspring.com> - 2011-09-01 19:14 -0400
    Re: fflush Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-01 17:27 -0600
      Re: fflush pete <pfiland@mindspring.com> - 2011-09-01 19:33 -0400
      Re: fflush Seebs <usenet-nospam@seebs.net> - 2011-09-02 01:36 +0000
      Re: fflush Kenneth Brody <kenbrody@spamcop.net> - 2011-09-02 11:08 -0400
        Re: fflush Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-02 09:35 -0600
        Re: fflush Nobody <nobody@nowhere.com> - 2011-09-03 07:24 +0100
      Re: fflush gordonb.47ba6@burditt.org (Gordon Burditt) - 2011-09-02 21:42 -0500
        Re: fflush Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-02 21:01 -0600
  Re: fflush Nobody <nobody@nowhere.com> - 2011-09-02 00:34 +0100
  Re: fflush mathog <dmathog@gmail.com> - 2011-09-02 09:57 -0700
    Re: fflush David Thompson <dave.thompson2@verizon.net> - 2011-09-09 01:28 -0400
  Re: fflush gordonb.o3gsp@burditt.org (Gordon Burditt) - 2011-09-02 21:36 -0500
    Re: fflush Keith Thompson <kst-u@mib.org> - 2011-09-03 12:05 -0700
      Re: fflush Kenneth Brody <kenbrody@spamcop.net> - 2011-09-06 12:51 -0400
        Re: fflush Keith Thompson <kst-u@mib.org> - 2011-09-06 10:51 -0700
  Re: fflush "io_x" <a@b.c.invalid> - 2011-09-03 10:13 +0200
    Re: fflush "io_x" <a@b.c.invalid> - 2011-09-09 08:19 +0200

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