FSEEKO
Section: Linux Programmer's Manual (3)
Updated: 2014-08-19
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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);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
fseeko(),
ftello():
-
_FILE_OFFSET_BITS == 64 ||
_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
(defining the obsolete _LARGEFILE_SOURCE macro also works)
DESCRIPTION
The
fseeko()
and
ftello()
functions are identical to
fseek(3)
and
ftell(3)
(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 compilation 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).
VERSIONS
These functions are available under glibc since version 2.1.
CONFORMING TO
SUSv2, POSIX.1-2001.
NOTES
These functions are found on System V-like systems.
SEE ALSO
fseek(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
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Time: 02:55:09 GMT, September 18, 2014