FILELENGTH(DOS) XENIX System V FILELENGTH(DOS)
Name
filelength - Gets the length of a file.
Syntax
#include <io.h>
long filelength (handle);
int handle;
Description
The filelength function returns the length in bytes of the
file associated with the given handle.
Return Value
filelength returns the file length in bytes. A return value
of -1L indicates an error, and errno is set to EBADF to
indicate an invalid file handle.
See Also
chsize(S), ferror(S), stat(S)
Example
#include <io.h> #include <stdio.h> #include <stdlib.h>
FILE *stream; long length;
stream = fopen ("data","r");
.
.
. /* The following statements attempt to determine the **
length of a file associated with a stream. */
length = filelength (fileno (stream));
if (length == -1L) perror ("filelength failed");
Notes
This call must be compiled with the -dos flag.
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