filelength

Syntax

#include <io.h> long filelength(int fhandle);

Description

This function returns the size, in bytes, of a file whose handle is specified in the argument fhandle. To get the handle of a file opened by fopen (see section fopen) or freopen (see section freopen), you can use fileno macro (see section fileno).

Return Value

The size of the file in bytes, or (if any error occured) -1L and errno set to a value describing the cause of the failure. If the file's length is larger than a 32-bit unsigned int can hold, errno will be set to EOVERFLOW.

Portability

ANSI/ISO C	No
POSIX	No

Example

printf("Size of file to which STDIN is redirected is %ld\n", filelength(0));