class_init(3) Library Functions Manual 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
Operation successfully completed. Not super user - permission denied. Failed to access disk file, if it exists. Failed to create or
attach to shared memory. 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. delim off
class_init(3)
