Redirecting stdout to a file in C through code

Question

I am outputting to stdout. How can I redirect that to a new file through code? While we run the program we can redirect like ./sample > test.txt. How can I do this when executing the sample program itself ? (C programming)

tvanfosson · Accepted Answer · 2010-04-15 19:25:31Z

8

You probably want to use freopen.

Example from reference:

#include <stdio.h>
...
FILE *fp;
...
fp = freopen ("/tmp/logfile", "a+", stdout);

answered Apr 15, 2010 at 19:25

tvanfosson

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Bastien Léonard · Accepted Answer · 2010-04-15 19:24:54Z

3

Use freopen().

answered Apr 15, 2010 at 19:24

Bastien Léonard

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mdml · Accepted Answer · 2014-06-16 18:27:10Z

0

Use dup2() system call and redirect the output to a file.

edited Jun 16, 2014 at 18:27

mdml

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answered Feb 26, 2013 at 13:05

Ashutosh Tiwari

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