field_term3
Set hooks for automatic invocation by applications
Part of field_init(3).
Usage
int set_field_init(FORM
*form,
Form_Hook
func);
Form_Hook
field_init(const
FORM
*form);
int set_field_term(FORM
*form,
Form_Hook
func);
Form_Hook
field_term(const
FORM
*form);
int set_form_init(FORM
*form,
Form_Hook
func);
Form_Hook
form_init(const
FORM
*form);
int set_form_term(FORM
*form,
Form_Hook
func);
Form_Hook
form_term(const
FORM
*form);
Overview
These functions make it possible to set hook functions to be called at various points in the automatic processing of input event codes by form_driver.
set_field_init
sets a hook to be called at form-post time and each time the selected field changes (after the change).
field_init
returns the current field init hook, if any (NULL if there is no such hook).
set_field_term
sets a hook to be called at form-unpost time and each time the selected field changes (before the change).
field_term
returns the current field term hook, if any (NULL if there is no such hook).
set_form_init
sets a hook to be called at form-post time and just after a page change once it is posted.
form_init
returns the current form init hook, if any (NULL if there is no such hook).
set_form_term
sets a hook to be called at form-unpost time and just before a page change once it is posted.
form_term
returns the current form term hook, if any (NULL if there is no such hook).
Return value
Routines that return pointers return NULL on error. Other routines return one of the following:
E_OK-
The routine succeeded.
E_SYSTEM_ERROR-
System error occurred (see errno(3)).
Portability
These routines emulate the System V forms library. They were not supported on Version 7 or BSD versions.
History
- FreeBSD 16.0-CURRENT (2026-10-27) to FreeBSD 15.1-RELEASE: the text shown here
- FreeBSD 15.0-RELEASE
- FreeBSD 14.5-RELEASE
- FreeBSD 14.4-RELEASE to FreeBSD 14.2-RELEASE
- FreeBSD 14.1-RELEASE to FreeBSD 14.0-RELEASE
- FreeBSD 13.5-RELEASE to FreeBSD 13.0-RELEASE
- FreeBSD 12.4-RELEASE to FreeBSD 11.0-RELEASE
- FreeBSD 10.4-RELEASE to FreeBSD 7.1-RELEASE
- FreeBSD 7.0-RELEASE
- FreeBSD 6.4-RELEASE
- FreeBSD 6.3-RELEASE
- FreeBSD 6.2-RELEASE to FreeBSD 4.3-RELEASE