filelength

Remonter à Io.h - Index

Header File

io.h

Category

Input/output Routines

Prototype

long filelength(int handle);

Description

Gets file size in bytes.

filelength returns the length (in bytes) of the file associated with handle.

Return Value

On success filelength returns a long value the file length in bytes. On error it returns -1 and the global variable errno is set to

EBADF

Bad file number

Example

 #include <string.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <io.h>
 int main(void)
 {
    int handle;
    char buf[11] = "0123456789";
    /* create a file containing 10 bytes */
    handle = open("DUMMY.FIL", O_CREAT);
    write(handle, buf, strlen(buf));
    /* display the size of the file */
    printf("file length in bytes: %ld\n", filelength(handle));
    /* close the file */
    close(handle);
    return 0;
 }

Portability

POSIX	Win32	ANSI C	ANSI C++
	+