scandir(3)                                             scandir(3)



     NAME
          scandir - 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 ar-
          ray 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 ar-
          ray. If this pointer is null, the array is not sorted.  al-
          phasort is a routine which can be used for the compar param-
          eter 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.

     RETURN VALUE
          Returns -1 if the directory cannot be opened for reading or
          if cannot allocate enough memory to hold all the data struc-
          tures.

     SEE ALSO
          directory(3), malloc(3C), malloc(3X), qsort(3C), dir(4).








     April, 1990                                                     1