получить информацию о текущей позиции файла (get current file position information)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
fgetpos — get current file position information
Синопсис (Synopsis)
#include <stdio.h>
int fgetpos(FILE *restrict stream, fpos_t *restrict pos);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The fgetpos() function shall store the current values of the
parse state (if any) and file position indicator for the stream
pointed to by stream in the object pointed to by pos. The value
stored contains unspecified information usable by fsetpos() for
repositioning the stream to its position at the time of the call
to fgetpos().
The fgetpos() function shall not change the setting of errno if
successful.
Возвращаемое значение (Return value)
Upon successful completion, fgetpos() shall return 0; otherwise,
it shall return a non-zero value and set errno to indicate the
error.
Ошибки (Error)
The fgetpos() function shall fail if:
EBADF The file descriptor underlying stream is not valid.
EOVERFLOW
The current value of the file position cannot be
represented correctly in an object of type fpos_t.
ESPIPE The file descriptor underlying stream is associated with a
pipe, FIFO, or socket.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
Section 2.5, Standard I/O Streams, fopen(3p), ftell(3p),
rewind(3p), ungetc(3p)
The Base Definitions volume of POSIX.1‐2017, stdio.h(0p)
