dir(5) [v7 man page]

DIR(5)								File Formats Manual							    DIR(5)

NAME

       dir - format of directories

SYNOPSIS

       #include <sys/dir.h>

DESCRIPTION

       A  directory  behaves  exactly like an ordinary file, save that no user may write into a directory.  The fact that a file is a directory is
       indicated by a bit in the flag word of its i-node entry see, filsys(5).	The structure of a directory entry as given in	the  include  file
       is:

       By  convention,	the first two entries in each directory are for `.' and `..'.  The first is an entry for the directory itself.	The second
       is for the parent directory.  The meaning of `..' is modified for the root directory of the master file system and for the root directories
       of  removable  file  systems.   In the first case, there is no parent, and in the second, the system does not permit off-device references.
       Therefore in both cases `..' has the same meaning as `.'.

SEE ALSO

       filsys(5)

																	    DIR(5)

DIRECTORY(3)						     Library Functions Manual						      DIRECTORY(3)

NAME

       directory, opendir, readdir, rewinddir, closedir, telldir, seekdir - directory routines

SYNOPSIS

       #include <sys/types.h>
       #include <dirent.h>

       DIR *opendir(const char *dirname)
       struct dirent *readdir(DIR *dirp)
       void rewinddir(DIR *dirp)
       int closedir(DIR *dirp)

       #define _MINIX  1
       #include <sys/types.h>
       #include <dirent.h>

       long telldir(DIR *dirp)
       int seekdir(DIR *dirp, long pos)

DESCRIPTION

       These routines form a system independent interface to access directories.

       Opendir() opens the directory dirname and returns a pointer to this open directory stream.

       Readdir()  reads  one  entry  from  the directory as a pointer to a structure containing the field d_name, a character array containing the
       null-terminated name of the entry.

       Rewinddir() allows the directory to be read again from the beginning.

       Closedir() closes the directory and releases administrative data.

       The Minix specific functions telldir() and seekdir() allow one to get the current position in the directory file and to return there later.
       Seekdir() may only be called with a position returned by telldir() or 0 (rewind).  These functions should not be used in portable programs.

SEE ALSO

       dir(5).

DIAGNOSTICS

       Opendir() returns a null pointer if dirname can't be opened, or if it can't allocate enough memory for the DIR structure.

       Readdir() returns null if there are no more directory entries or on error.

       Closedir() and seekdir() returns 0 on success, -1 on error.

       Telldir() returns -1 on error.

       All  of	them  set errno appropriately.	Readdir() will only set errno on error, not on end-of-dir, so you should set errno to zero before-
       hand, and check its value if readdir() returns null.

NOTES

       The return value of readdir() needs to be copied before the next operation on the same directory if it is to be saved.

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																      DIRECTORY(3)