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class_init(3)
NAME
  class_init - Initialize the class scheduler database

LIBRARY
  Standard C Library (libclass.a)

SYNOPSIS
  #include <sys/class.h>
   class_init(void)



DESCRIPTION
  Prepare the class scheduler database for use by:

    ·  opening the disk file (if any)

    ·  creating (or attaching to) a shared memory section

    ·  creating (or attaching to) a semaphore

  Before class scheduling can be used, the database must be initialized.  At
  the first call of class_init() since the last boot, the function creates a
  shared memory segment for the database and, if it exists on disk, reads it
  into the shared memory.  A semaphore	is also created that is used to
  synchronize potential simultaneous database updates (for example, from
  class_admin(8) or runclass(1)).

  On subsequent calls to class_init(), the function attaches to the existing
  shared memory and semaphore.

  Note that the calling process must have root access privileges

RETURN VALUES
  [CLASS_SUCCESS]
      Operation successfully completed.

  [CLASS_NOT_SUSER]
      Not super user - permission denied.

  [CLASS_FILE_FAILURE]
      Failed to access disk file, if it exists.

  [CLASS_SHARED_MEM_FAILURE]
      Failed to create or attach to shared memory.

  [CLASS_SEMAPHORE_FAILURE]
      Failed to create or attach to semaphore.







SEE ALSO
  Functions:class_add(3), class_change(3), class_create(3), class_close(3),
  class_configure(3), class_get_config_stats(3), class_delete(3),
  class_destroy(3), class_disable(3), class_enable(3),
  class_save_database(3), class_restore_database(3), class_load_database(3),
  class_change_name(3), class_database_file_exists(3),
  class_database_name(3), class_database_modified(3), class_get_classes(3),
  class_get_class_members(3),

  Commands:class_admin(8), runclass(1), class_scheduling(4)

  Other: The System Administration guide.

Index for Section 3

Alphabetical listing for C

Top of page