вернуть текущее местоположение в потоке каталогов (return current location in directory stream)
Имя (Name)
telldir - return current location in directory stream
Синопсис (Synopsis)
#include <dirent.h>
long telldir(DIR *dirp);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
telldir():
_XOPEN_SOURCE
|| /* Glibc since 2.19: */ _DEFAULT_SOURCE
|| /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
Описание (Description)
The telldir() function returns the current location associated
with the directory stream dirp.
Возвращаемое значение (Return value)
On success, the telldir() function returns the current location
in the directory stream. On error, -1 is returned, and errno is
set to indicate the error.
Ошибки (Error)
EBADF Invalid directory stream descriptor dirp.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│telldir() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008, 4.3BSD.
Примечание (Note)
In glibc up to version 2.1.1, the return type of telldir() was
off_t. POSIX.1-2001 specifies long, and this is the type used
since glibc 2.1.2.
In early filesystems, the value returned by telldir() was a
simple file offset within a directory. Modern filesystems use
tree or hash structures, rather than flat tables, to represent
directories. On such filesystems, the value returned by
telldir() (and used internally by readdir(3)) is a "cookie" that
is used by the implementation to derive a position within a
directory. Application programs should treat this strictly as an
opaque value, making no assumptions about its contents.
Смотри также (See also)
closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3),
seekdir(3)
