getdirentries(2)                                 getdirentries(2)



NAME
     getdirentries - gets directory entries

SYNOPSIS
     #include <sys/types.h>
     #include <sys/dir.h>

     int getdirentries(d, buf, nbytes, basep)
     int d;
     char *buf;
     int nbytes;
     long *basep;

DESCRIPTION
     getdirentries attempts to put directory entries from the
     directory referenced by the descriptor d into the buffer
     pointed to by buf, in a file system independent format.  Up
     to nbytes of data will be transferred.  nbytes must be
     greater than or equal to the block size associated with the
     file (see stat(2)).  Sizes less than this may cause errors
     on certain file systems.

     The data in the buffer is a series of direct structures.
     The direct structure is defined as

        struct direct {
               unsigned long   d_fileno;
               unsigned short  d_reclen;
               unsigned short  d_namlen;
               char            d_name[MAXNAMELEN + 1];
        };

     The d_fileno entry is a number which is unique for each
     distinct file in the file system.  Files that are linked by
     hard links (see link(2)) have the same d_fileno.  The
     d_reclen entry is the length, in bytes, of the directory
     record.  The d_name and d_namelen entries specify the actual
     file name and its length.

     Upon return, the actual number of bytes transferred is
     returned.  The current position pointer associated with d is
     set to point to the next block of entries.  The pointer is
     not necessarily incremented by the number of bytes returned
     by getdirentries.  If the value returned is zero, the end of
     the directory has been reached.  The current position
     pointer may be set and retrieved by lseek(2).  The basep
     entry is a pointer to a location into which the current
     position of the buffer just transferred is placed.  It is
     not safe to set the current position pointer to any value
     other than a value previously returned by lseek(2) or a
     value previously returned in basep or zero.




January 1992                                                    1

getdirentries(2)                                 getdirentries(2)



STATUS MESSAGES AND VALUES
     If successful, the number of bytes actually transferred is
     returned.  Otherwise, a -1 is returned and the global
     variable errno is set to indicate the error.

SEE ALSO
     link(2), lseek(2), open(2), stat(2), directory(3)
















































2                                                    January 1992