int
scandir(
const char *dirname
, struct dirent ***namelist
, int *selectconst struct dirent *
, int *comparconst void *, const void *
)
int
alphasort(
const void *d1
, const void *d2
)
)
function
reads the directory
dirname
and builds an array of pointers to directory
entries using
malloc(3).
It returns the number of entries in the array.
A pointer to the array of directory entries is stored in the location
referenced by
namelist
.
The
select
parameter is a pointer to a user supplied subroutine which is called by
scandir()
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.
If
select
is null, then all the directory entries will be included.
The
compar
parameter is a pointer to a user supplied subroutine which is passed to
qsort(3)
to sort the completed array.
If this pointer is null, the array is not sorted.
The
alphasort()
function
is a routine which can be used for the
compar
parameter to sort the array alphabetically.
The memory allocated for the array can be deallocated with free(3), by freeing each pointer in the array and then the array itself.
)
and
alphasort(
)
functions appeared in
4.2BSD.