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alphasort

SCANDIR(3)						     Library Functions 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 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.  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.

4.2 Berkeley Distribution					September 17, 1985							SCANDIR(3)

Programming