Gets the position of the file pointer.
| #include <io.h> | Required only for function declarations |
long _tell( int handle );
| handle | Handle referring to open file |
The _tell function gets the current position of the file pointer (if any) associated with the handle argument. The position is expressed as the number of bytes from the beginning of the file.
A return value of –1L indicates an error, and errno is set to EBADF to indicate an invalid file-handle argument. On devices incapable of seeking, the return value is undefined.
Standards:None
16-Bit:DOS, QWIN, WIN, WIN DLL
32-Bit:DOS32X
/* TELL.C: This program uses _tell to tell the file pointer position
* after a file read.
*/
#include <io.h>
#include <stdio.h>
#include <fcntl.h>
void main( void )
{
int fh;
long position;
char buffer[500];
if( (fh = _open( "tell.c", _O_RDONLY )) != -1 )
{
if( _read( fh, buffer, 500 ) > 0 )
printf( "Current file position is: %d\n", _tell( fh ) );
_close( fh );
}
}
Current file position is: 425