PROLOGThis 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.
NAMEdirent.h --- format of directory entries
DESCRIPTIONThe internal format of directories is unspecified. The <dirent.h> header shall define the following type:
A type representing a directory stream. The
type may be an incomplete type.
It shall also define the structure
which shall include the following members:
ino_t d_ino File serial number. char d_name Filename string of entry.
int alphasort(const struct dirent **, const struct dirent **); int closedir(DIR *); int dirfd(DIR *); DIR *fdopendir(int); DIR *opendir(const char *); struct dirent *readdir(DIR *); int readdir_r(DIR *restrict, struct dirent *restrict, struct dirent **restrict); void rewinddir(DIR *); int scandir(const char *, struct dirent ***, int (*)(const struct dirent *), int (*)(const struct dirent **, const struct dirent **)); void seekdir(DIR *, long); long telldir(DIR *);
The following sections are informative.
RATIONALEInformation similar to that in the <dirent.h> header is contained in a file <sys/dir.h> in 4.2 BSD and 4.3 BSD. The equivalent in these implementations of struct dirent from this volume of POSIX.1-2008 is struct direct. The filename was changed because the name <sys/dir.h> was also used in earlier implementations to refer to definitions related to the older access method; this produced name conflicts. The name of the structure was changed because this volume of POSIX.1-2008 does not completely define what is in the structure, so it could be different on some implementations from struct direct. The name of an array of char of an unspecified size should not be used as an lvalue. Use of:
SEE ALSO<sys_types.h> The System Interfaces volume of POSIX.1-2008, alphasort(), closedir(), dirfd(), fdopendir(), readdir(), rewinddir(), seekdir(), telldir()
COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at www.unix.org/online.html .
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