FSEEKO(3) Linux Programmer's Manual FSEEKO(3)NAME
fseeko, ftello - seek to or report file position
SYNOPSIS
#include <stdio.h>
int fseeko(FILE *stream, off_t offset, int whence);
off_t ftello(FILE *stream);
DESCRIPTION
The fseeko() and ftello() functions are identical to fseek() and
ftell() (see fseek(3)), respectively, except that the offset argument
of fseeko() and the return value of ftello() is of type off_t instead
of long.
On many architectures both off_t and long are 32-bit types, but compi‐
lation with
#define _FILE_OFFSET_BITS 64
will turn off_t into a 64-bit type.
RETURN VALUE
On successful completion, fseeko() returns 0, while ftello() returns
the current offset. Otherwise, -1 is returned and errno is set to
indicate the error.
ERRORS
See the ERRORS in fseek(3).
NOTES
These functions are found on System V-like systems. They are not
present in libc4, libc5, glibc 2.0 but are available since glibc 2.1.
CONFORMING TO
SUSv2, POSIX.1-2001.
SEE ALSOfseek(3)
2001-11-05 FSEEKO(3)
