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* libdpkg - Debian packaging suite library routines
* triglib.h - declarations for trigger handling
* Copyright © 2007 Canonical, Ltd.
* written by Ian Jackson <>
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <>.
#include <dpkg/macros.h>
#include <dpkg/dpkg-db.h>
* Hooks for more sophisticated processing in dpkg proper.
* We do things like this so we can get most of the trigger tracking
* in dpkg-query, dselect, and so on, but avoid the transitional
* processing and deferred trigproc queue management other than when
* we're actually doing real package management work.
const char *trig_name_is_illegal(const char *p);
enum trig_options {
struct trigfileint {
struct pkginfo *pkg;
struct filenamenode *fnn;
enum trig_options options;
struct trigfileint *samefile_next;
struct {
struct trigfileint *next, *prev;
} inoverall;
/* The first two hooks are normally NULL.
* If non-NULL, we're dpkg proper and we might need to invent trigger
* activations as the first run of a triggers-supporting dpkg. */
struct trig_hooks {
void (*enqueue_deferred)(struct pkginfo *pend);
void (*transitional_activate)(enum modstatdb_rw cstatus);
struct filenamenode *(*namenode_find)(const char *filename, bool nonew);
struct trigfileint **(*namenode_interested)(struct filenamenode *fnn);
/* Returns a pointer from nfmalloc. */
const char *(*namenode_name)(struct filenamenode *fnn);
static struct trigfileint **th_nn_interested(struct filenamenode *fnn) \
{ return &fnn->trig_interested; } \
static const char *th_nn_name(struct filenamenode *fnn) \
{ return fnn->name; }
void trig_override_hooks(const struct trig_hooks *hooks);
void trig_file_activate_byname(const char *trig, struct pkginfo *aw);
void trig_file_activate(struct filenamenode *trig, struct pkginfo *aw);
bool trig_note_pend_core(struct pkginfo *pend, const char *trig /*not copied!*/);
bool trig_note_pend(struct pkginfo *pend, const char *trig /*not copied!*/);
bool trig_note_aw(struct pkginfo *pend, struct pkginfo *aw);
void trig_clear_awaiters(struct pkginfo *notpend);
typedef void trig_awaited_pend_foreach_func(struct pkginfo *pkg);
void trig_awaited_pend_enqueue(struct pkginfo *pend);
void trig_awaited_pend_foreach(trig_awaited_pend_foreach_func *func);
void trig_awaited_pend_free(void);
void trig_fixup_awaiters(enum modstatdb_rw cstatus);
void trig_file_interests_ensure(void);
void trig_file_interests_save(void);
typedef void trig_parse_cicb(const char *trig, void *user, enum trig_options to);
void trig_cicb_interest_delete(const char *trig, void *user, enum trig_options to);
void trig_cicb_interest_add(const char *trig, void *user, enum trig_options to);
void trig_cicb_statuschange_activate(const char *trig, void *user,
enum trig_options to);
void trig_parse_ci(const char *file, trig_parse_cicb *interest,
trig_parse_cicb *activate, void *user);
void trig_incorporate(enum modstatdb_rw cstatus);
#endif /* LIBDPKG_TRIGLIB_H */