# 2.11BSD#431 - /usr/man/cat3/alphasort.0

    SCANDIR(3)	    UNIX Programmer's Manual	       SCANDIR(3)

    NAME
         scandir, alphasort - scan a directory

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

         scandir(dirname, namelist, select, compar)
         char *dirname;
         struct direct *(*namelist[]);
         int (*select)();
         int (*compar)();

         alphasort(d1, d2)
         struct direct **d1, **d2;

    DESCRIPTION
         Scandir 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 and a pointer to the
         array through namelist.

         The select parameter is a pointer to a user supplied subrou-
         tine 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 subrou-
         tine which is passed to qsort(3) to sort the completed
         array. If this pointer is null, the array is not sorted.
         Alphasort 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 (see malloc(3)) by freeing each pointer in the array
         and the array itself.

    SEE ALSO
         directory(3), malloc(3), qsort(3), dir(5)

    DIAGNOSTICS
         Returns -1 if the directory cannot be opened for reading or
         if malloc(3) cannot allocate enough memory to hold all the
         data structures.

    Printed 11/26/99       September 17, 1985			1

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