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Full Discussion: C, UNIX: How to redirect 'stdout' to a file from a C code?
Top Forums Programming C, UNIX: How to redirect 'stdout' to a file from a C code? Post 302983598 by alex_5161 on Thursday 13th of October 2016 04:19:09 PM
Old 10-13-2016
Thank you, jim mcnamara, it is perfectly helps!
Sure here is more than I need in my case, but everything is clear and strait forward!
Additionaly, your code keep a way to switch back that not needed right now, but could be a task later on such approach!

Also I've found useful (by another reply) the 'freopen()' C-function and did it in very simple way, too.
(... for anybody else with the same task and for myself later, here is how I did it with freopen() ) :
Code:
#include <iostream>
#include <fstream>
#include <stdio.h>

using namespace std;

void redir(char* fl_nm)
{
  freopen(fl_nm,"a",stdout);
}

int main()
{
   cout << "starting - by cout\n";
   printf(" this written by printf()\n Following messages shoul go to the file '/tmp/tst_redir.log'\n");

   redir((char*)"/tmp/tst_redir.log");

   cout << ".. By 'cout' after using the redir(): this should be written to the file\n";
   printf(" .. By printf() after 'redir()'...\n");

  return 0;
}

But, again, thanks for your solution!!
 

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LEARN ABOUT DEBIAN

zziplib-bin

ZZIPLIB-BIN(1)						      General Commands Manual						    ZZIPLIB-BIN(1)

NAME

       zzcat, zzdir, zzxorcat, zzxordir zzxorcopy - small tools using zziplib

SYNOPSIS

       zzcat FILE [...]  zzdir DIR [...]  zzxorcat [-HEX] FILE [...]  zzxordir [-HEX] DIR [...]  zzxorcopy [-HEX] FILE OUTFILE

DESCRIPTION

       zzcat  prints the given files to stdout, so you may want to redirect the output. The FILE can be a normal file or an inflated part of a zip
       archive (see OPTIONS).

       zzdir prints the content table to stdout of the given DIR or zipfile.

       zzxorcat prints the given files to stdout, so you may want to redirect the  output.  The  FILE  is  an  inflated  part  of  a  zip  archive
       obfusctated with a xor value optionally given by the HEX option.

       zzxordir  prints the content table to stdout of the given DIR or zipfile. The DIR can br an inflated part of a zip archive obfusctated with
       a xor value optionally given by the HEX option.

       zzxorcopy copies data from FILE to OUTFILE adding simple obfuscation by xor-ing each byte with the HEX value given.  Remember that  copying
       data twice with the same xor-value will result in the original file data.

OPTIONS

       zziplib-bin tools accept the following options:

       FILE    Input  filename	for reading or part (if supported by tool). Part is written as zipname/filename, e.g.: for accessing README inside
	       of data.zip you'll specify data/README.

       DIR     Disk directory, zipfile or inflated part of a zipfile.

       -HEX    Hex number for xor-ing the zipfile contents. If not supplied all tools that use it take 0x55 as default value for xor-ing.  OUTFILE
	       Output file name for zzxorcopy.

AUTHORS

       zziplib was written by Guido Draheim <guidod@gmx.de>.

       This manual page was written by Ricardo Mones <mones@aic.uniovi.es>, for the Debian GNU/Linux system (but may be used by others).

								   June 25, 2004						    ZZIPLIB-BIN(1)
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