fseek - C FILE Functions

Purpose

The fseek function is used to change the position of a file pointer (identified by FILE stream).

Header File

stdio.h

(fseek)

Prototype

int fseek (FILE * Stream, long int Offset, int Origin);

Arguments

Stream

Pointer to an open FILE structure

Offset

The (signed) number of bytes by which the file pointer is to be positioned from the origin.

Origin

The reference position. One of:

SEEK_SET: Beginning of file
SEEK_CUR: Current file position
SEEK_END: End of file

Return Values

>=0
: Current number of bytes by which the file pointer is positioned from the origin..
-1
: The seek failed.

Example

#include <stdio.h> 
 .  .  .
  FILE *   Account_Master;
  long int Record_Number;
  int      LRecl;
    .  .  .
  if (fseek (Account_Master, Record_Number * LRecl, SEEK_SET) >= 0)
    printf ("Seek succeeded.");
  else
    printf ("Seek failed.");Codeexample

External Links

fseek	HP 3000 Library Reference Manual
fseek	The Open Group Base Specifications
fseek	MSDN

fseek Function

C FILE Functions