fseeko, ftello - seek to or report file position
#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)):
_FILE_OFFSET_BITS == 64 || _POSIX_C_SOURCE >= 200112L (defining the obsolete _LARGEFILE_SOURCE macro also works)
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
On some architectures, both
long are 32-bit types, but defining _FILE_OFFSET_BITS with the value 64 (before including
any header files) will turn
off_t into a 64-bit type.
See the ERRORS in fseek(3).
These functions are available under glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
|fseeko(), ftello()||Thread safety||MT-Safe|
POSIX.1-2001, POSIX.1-2008, SUSv2.
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