.\" Copyright (c) 1983 Regents of the University of California.
.\" %sccs.include.redist.man%
.\" @(#)scandir.3 6.6 (Berkeley) %G%
scandir, alphasort \- scan a directory
scandir(dirname, namelist, select, compar)
struct direct ***namelist;
and builds an array of pointers to directory
It returns the number of entries in the array.
A pointer to the array of directory entries is stored in the location
parameter is a pointer to a user supplied subroutine which is called by
to select which entries are to be included in the array.
The select routine is passed a
pointer to a directory entry and should return a non-zero
value if the directory entry is to be included in the array.
is null, then all the directory entries will be included.
parameter is a pointer to a user supplied subroutine which is passed to
to sort the completed array.
If this pointer is null, the array is not sorted.
is a routine which can be used for the
parameter to sort the array alphabetically.
The memory allocated for the array can be deallocated with
by freeing each pointer in the array and then the array itself.
directory(3), malloc(3), qsort(3), dir(5)
Returns \-1 if the directory cannot be opened for reading or if
cannot allocate enough memory to hold all the data structures.