setvbuf : setvbuf « stdio.h « C Tutorial






  1. C Tutorial
  2. stdio.h
  3. setvbuf
ItemValue
Header filestdio.h
Declarationint setvbuf(FILE *stream, char *buf, int mode, size_t size);
Returnreturns zero on success, nonzero on failure.


Function sets the buffer for stream to be buffer, with a size of size.

Possible values of mode are _IOFBF, _IONBF, and _IOLBF.

  1. _IOFBF: full buffering.
  2. _IOLBF: line buffered.
  3. _IONBF: no buffering.
#include <stdio.h>

int main ()
{
  FILE *fp;

  fp=fopen ("myfile.txt","w");

  setvbuf ( fp , NULL , _IOFBF , 1024 );

  // File operations here

  fclose (fp);

  return 0;
}








22.33.setvbuf
22.33.1.setvbuf