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Re: Function to determine the number of chars in a FILE buffer

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On 08/31/2011 06:43 PM, tm wrote:
> Is there a portable solution to find out how many chars are
> buffered in FILE *aFile.

There's no portable way to find out how many chars; only a portable way
to set the number of chars: setvbuf(), but you're already aware of that
option.

> ... This interests me for a file in read
> mode and when the file is a FIFO (opened with popen()).

A fully portable C program cannot call popen() and has no way to be sure
whether or not a stream that it opens is a FIFO. You'll get better
answers to your questions in a newsgroup associated with the library
that provides popen() (and select() and fileno(), and all of the other
implementation-specific features referred to in your program).

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Function to determine the number of chars in a FILE buffer tm <thomas.mertes@gmx.at> - 2011-08-31 15:43 -0700
  Re: Function to determine the number of chars in a FILE buffer James Kuyper <jameskuyper@verizon.net> - 2011-08-31 18:56 -0400
    Re: Function to determine the number of chars in a FILE buffer Angel <angel+news@spamcop.net> - 2011-09-01 06:25 +0000
      Re: Function to determine the number of chars in a FILE buffer tm <thomas.mertes@gmx.at> - 2011-09-01 00:23 -0700
        Re: Function to determine the number of chars in a FILE buffer Robert Wessel <robertwessel2@yahoo.com> - 2011-09-01 03:27 -0500
        Re: Function to determine the number of chars in a FILE buffer James Kuyper <jameskuyper@verizon.net> - 2011-09-01 06:58 -0400
          Re: Function to determine the number of chars in a FILE buffer Keith Thompson <kst-u@mib.org> - 2011-09-01 08:29 -0700
        Re: Function to determine the number of chars in a FILE buffer Kenneth Brody <kenbrody@spamcop.net> - 2011-09-01 14:37 -0400
        Re: Function to determine the number of chars in a FILE buffer gordonb.nfrza@burditt.org (Gordon Burditt) - 2011-09-02 21:58 -0500
    Re: Function to determine the number of chars in a FILE buffer tm <thomas.mertes@gmx.at> - 2011-08-31 23:54 -0700
      Re: Function to determine the number of chars in a FILE buffer Jasen Betts <jasen@xnet.co.nz> - 2011-09-01 11:02 +0000
        Re: Function to determine the number of chars in a FILE buffer tm <thomas.mertes@gmx.at> - 2011-09-01 05:44 -0700
      Re: Function to determine the number of chars in a FILE buffer David Schwartz <davids@webmaster.com> - 2011-09-01 04:41 -0700
  Re: Function to determine the number of chars in a FILE buffer Ike Naar <ike@iceland.freeshell.org> - 2011-09-01 04:37 +0000
  Re: Function to determine the number of chars in a FILE buffer Mark Storkamp <mstorkamp@yahoo.com> - 2011-09-01 08:23 -0500

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