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Re: How to dup a FILE*

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On Tue, 06 Dec 2011 09:51:43 +0100, Josef Moellers wrote about How to
dup a FILE*:

>I need to juggle with stderr: redirecting it from one file to another
>and back.
[snip]

I think you're over-complicating things here.  After all, stderr is
simply a pointer.  So, cache the old pointer; open a new file stream
stored in stderr; fclose(stderr) when done; reinstate the original
pointer.  E.g.

     FILE * old_stderr = stderr;

     stderr = fopen(new_file_name, "w");
     /* Do some stuff with errors logged to new file. */
     . . .
     . . .
     /* Finished with new error log. */
     fclose(stderr);

     /* Restore old stderr pointer. */
     stderr = old_stderr;
- -- 
Regards,

Dave  [RLU #314465]
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dwnoon@spamtrap.ntlworld.com (David W Noon)
Remove spam trap to reply by e-mail.
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Thread

How to dup a FILE* Josef Moellers <josef.moellers@ts.fujitsu.com> - 2011-12-06 09:51 +0100
  Re: How to dup a FILE* Richard Kettlewell <rjk@greenend.org.uk> - 2011-12-06 09:16 +0000
    Re: How to dup a FILE* Josef Moellers <josef.moellers@ts.fujitsu.com> - 2011-12-06 10:41 +0100
  Re: How to dup a FILE* Jasen Betts <jasen@xnet.co.nz> - 2011-12-06 13:28 +0000
    Re: How to dup a FILE* Josef Moellers <josef.moellers@ts.fujitsu.com> - 2011-12-06 16:57 +0100
  Re: How to dup a FILE* David W Noon <dwnoon@spamtrap.ntlworld.com> - 2011-12-06 19:53 +0000
    Re: How to dup a FILE* Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-12-06 20:38 +0000
      Re: How to dup a FILE* Richard Kettlewell <rjk@greenend.org.uk> - 2011-12-06 22:03 +0000
      Re: How to dup a FILE* David W Noon <dwnoon@spamtrap.ntlworld.com> - 2011-12-06 21:46 +0000
        Re: How to dup a FILE* Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-12-07 17:52 +0000

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