искать или сообщать о позиции файла (seek to or report file position)
Имя (Name)
fseeko, ftello - seek to or report file position
Синопсис (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
Описание (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 some architectures, both off_t and 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.
Возвращаемое значение (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.
Ошибки (Error)
See the ERRORS in fseek(3).
Версии (Versions)
These functions are available under glibc since version 2.1.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│fseeko(), ftello() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008, SUSv2.
Примечание (Note)
The declarations of these functions can also be obtained by
defining the obsolete _LARGEFILE_SOURCE feature test macro.
Смотри также (See also)
fseek(3)
