NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO |
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telldir(3) Library Functions Manual telldir(3)
telldir - return current location in directory stream
Standard C library (libc, -lc)
#include <dirent.h> long telldir(DIR *dirp); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): telldir(): _XOPEN_SOURCE || /* glibc >= 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
The telldir() function returns the current location associated with the directory stream dirp.
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.
EBADF Invalid directory stream descriptor dirp.
For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────────────────┬───────────────┬─────────┐ │ Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼─────────┤ │ telldir() │ Thread safety │ MT-Safe │ └─────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
POSIX.1-2001, 4.3BSD. Up to glibc 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.
closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3),
seekdir(3)
Linux man-pages (unreleased) (date) telldir(3)
Pages that refer to this page: closedir(3), dirfd(3), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3)