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@@ -0,0 +1,99 @@
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+/*
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+ * libdpkg - Debian packaging suite library routines
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+ * triglib.h - declarations for trigger handling
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+ *
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+ * Copyright © 2007 Canonical, Ltd.
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+ * written by Ian Jackson <ian@chiark.greenend.org.uk>
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+ *
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+ * This is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#ifndef LIBDPKG_TRIGLIB_H
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+#define LIBDPKG_TRIGLIB_H
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+
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+#include <dpkg/macros.h>
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+#include <dpkg/dpkg-db.h>
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+
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+DPKG_BEGIN_DECLS
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+
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+/*
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+ * Hooks for more sophisticated processing in dpkg proper.
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+ *
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+ * We do things like this so we can get most of the trigger tracking
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+ * in dpkg-query, dselect, and so on, but avoid the transitional
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+ * processing and deferred trigproc queue management other than when
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+ * we're actually doing real package management work.
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+ */
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+
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+const char *illegal_triggername(const char *p);
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+
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+struct trigfileint {
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+ struct pkginfo *pkg;
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+ struct filenamenode *fnn;
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+ struct trigfileint *samefile_next;
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+ struct {
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+ struct trigfileint *next, *back;
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+ } inoverall;
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+};
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+
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+/* The first two hooks are normally NULL.
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+ * If non-NULL, we're dpkg proper and we might need to invent trigger
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+ * activations as the first run of a triggers-supporting dpkg. */
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+struct trig_hooks {
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+ void (*enqueue_deferred)(struct pkginfo *pend);
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+ void (*transitional_activate)(enum modstatdb_rw cstatus);
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+
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+ struct filenamenode *(*namenode_find)(const char *filename, int nonew);
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+ struct trigfileint **(*namenode_interested)(struct filenamenode *fnn);
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+
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+ /* Returns a pointer from nfmalloc. */
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+ const char *(*namenode_name)(struct filenamenode *fnn);
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+};
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+
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+#define TRIGHOOKS_DEFINE_NAMENODE_ACCESSORS \
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+ static struct trigfileint **th_nn_interested(struct filenamenode *fnn) \
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+ { return &fnn->trig_interested; } \
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+ static const char *th_nn_name(struct filenamenode *fnn) \
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+ { return fnn->name; }
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+
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+void trig_override_hooks(const struct trig_hooks *hooks);
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+
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+char *trig_get_triggersdir(const char *admindir);
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+
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+void trig_file_activate_byname(const char *trig, struct pkginfo *aw);
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+void trig_file_activate(struct filenamenode *trig, struct pkginfo *aw);
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+
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+int trig_note_pend_core(struct pkginfo *pend, const char *trig /*not copied!*/);
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+int trig_note_pend(struct pkginfo *pend, const char *trig /*not copied!*/);
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+int trig_note_aw(struct pkginfo *pend, struct pkginfo *aw);
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+void trig_clear_awaiters(struct pkginfo *notpend);
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+
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+void trig_enqueue_awaited_pend(struct pkginfo *pend);
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+void trig_fixup_awaiters(enum modstatdb_rw cstatus);
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+
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+void trig_file_interests_ensure(void);
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+void trig_file_interests_save(void);
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+
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+typedef void trig_parse_cicb(const char *trig, void *user);
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+void trig_cicb_interest_delete(const char *trig, void *user);
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+void trig_cicb_interest_add(const char *trig, void *user);
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+void trig_cicb_statuschange_activate(const char *trig, void *user);
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+void trig_parse_ci(const char *file, trig_parse_cicb *interest,
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+ trig_parse_cicb *activate, void *user);
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+
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+void trig_incorporate(enum modstatdb_rw cstatus, const char *admindir);
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+
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+DPKG_END_DECLS
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+
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+#endif /* LIBDPKG_TRIGLIB_H */
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