lib/dpkg/trignote.c

   1 /*
   2  * libdpkg - Debian packaging suite library routines
   3  * trignote.c - trigger note handling
   4  *
   5  * Copyright © 2007 Canonical Ltd
   6  * Written by Ian Jackson <ijackson@chiark.greenend.org.uk>
   7  * Copyright © 2008-2014 Guillem Jover <guillem@debian.org>
   8  *
   9  * This is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <config.h>
  24 #include <compat.h>
  25
  26 #include <string.h>
  27
  28 #include <dpkg/dpkg.h>
  29 #include <dpkg/dpkg-db.h>
  30 #include <dpkg/pkg.h>
  31 #include <dpkg/pkg-list.h>
  32 #include <dpkg/dlist.h>
  33 #include <dpkg/triglib.h>
  34
  35 /*
  36  * Note: This is also called from fields.c where *pend is a temporary!
  37  *
  38  * trig is not copied!
  39  */
  40 bool
  41 trig_note_pend_core(struct pkginfo *pend, const char *trig)
  42 {
  43         struct trigpend *tp;
  44
  45         for (tp = pend->trigpend_head; tp; tp = tp->next)
  46                 if (strcmp(tp->name, trig) == 0)
  47                         return false;
  48
  49         tp = nfmalloc(sizeof(*tp));
  50         tp->name = trig;
  51         tp->next = pend->trigpend_head;
  52         pend->trigpend_head = tp;
  53
  54         return true;
  55 }
  56
  57 /*
  58  * trig is not copied!
  59  *
  60  * @retval true  For done.
  61  * @retval false For already noted.
  62  */
  63 bool
  64 trig_note_pend(struct pkginfo *pend, const char *trig)
  65 {
  66         if (!trig_note_pend_core(pend, trig))
  67                 return false;
  68
  69         if (pend->trigaw.head)
  70                 pkg_set_status(pend, PKG_STAT_TRIGGERSAWAITED);
  71         else
  72                 pkg_set_status(pend, PKG_STAT_TRIGGERSPENDING);
  73
  74         return true;
  75 }
  76
  77 /*
  78  * Note: This is called also from fields.c where *aw is a temporary
  79  * but pend is from pkg_hash_find()!
  80  *
  81  * @retval true  For done.
  82  * @retval false For already noted.
  83  */
  84 bool
  85 trig_note_aw(struct pkginfo *pend, struct pkginfo *aw)
  86 {
  87         struct trigaw *ta;
  88
  89         /* We search through aw's list because that's probably shorter. */
  90         for (ta = aw->trigaw.head; ta; ta = ta->sameaw.next)
  91                 if (ta->pend == pend)
  92                         return false;
  93
  94         ta = nfmalloc(sizeof(*ta));
  95         ta->aw = aw;
  96         ta->pend = pend;
  97         ta->samepend_next = pend->othertrigaw_head;
  98         pend->othertrigaw_head = ta;
  99         LIST_LINK_TAIL_PART(aw->trigaw, ta, sameaw);
 100
 101         return true;
 102 }
 103
 104 static struct pkg_list *trig_awaited_pend_head;
 105
 106 void
 107 trig_awaited_pend_enqueue(struct pkginfo *pend)
 108 {
 109         struct pkg_list *tp;
 110
 111         for (tp = trig_awaited_pend_head; tp; tp = tp->next)
 112                 if (tp->pkg == pend)
 113                         return;
 114
 115         pkg_list_prepend(&trig_awaited_pend_head, pend);
 116 }
 117
 118 void
 119 trig_awaited_pend_foreach(trig_awaited_pend_foreach_func *func)
 120 {
 121         struct pkg_list *tp;
 122
 123         for (tp = trig_awaited_pend_head; tp; tp = tp->next)
 124                 if (!tp->pkg->trigpend_head)
 125                         func(tp->pkg);
 126 }
 127
 128 void
 129 trig_awaited_pend_free(void)
 130 {
 131         pkg_list_free(trig_awaited_pend_head);
 132         trig_awaited_pend_head = NULL;
 133 }