[dpkg] / lib / dpkg / dbmodify.c

/*
 * libdpkg - Debian packaging suite library routines
 * dbmodify.c - routines for managing dpkg database updates
 *
 * Copyright © 1994,1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
 * Copyright © 2001 Wichert Akkerman <wichert@debian.org>
 * Copyright © 2006-2014 Guillem Jover <guillem@debian.org>
 *
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * 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 <https://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <compat.h>

#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>

#include <dpkg/i18n.h>
#include <dpkg/c-ctype.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/file.h>
#include <dpkg/dir.h>
#include <dpkg/triglib.h>

static bool db_initialized;

static enum modstatdb_rw cstatus=-1, cflags=0;
static char *lockfile;
static char *statusfile, *availablefile;
static char *importanttmpfile=NULL;
static FILE *importanttmp;
static int nextupdate;
static char *updatesdir;
static int updateslength;
static char *updatefnbuf, *updatefnrest;
static struct varbuf uvb;

static int ulist_select(const struct dirent *de) {
  const char *p;
  int l;
  for (p= de->d_name, l=0; *p; p++, l++)
    if (!c_isdigit(*p))
      return 0;
  if (l > IMPORTANTMAXLEN)
    ohshit(_("updates directory contains file '%.250s' whose name is too long "
           "(length=%d, max=%d)"), de->d_name, l, IMPORTANTMAXLEN);
  if (updateslength == -1) updateslength= l;
  else if (l != updateslength)
    ohshit(_("updates directory contains files with different length names "
           "(both %d and %d)"), l, updateslength);
  return 1;
}

static void cleanupdates(void) {
  struct dirent **cdlist;
  int cdn, i;

  parsedb(statusfile, pdb_parse_status, NULL);

  *updatefnrest = '\0';
  updateslength= -1;
  cdn= scandir(updatefnbuf, &cdlist, &ulist_select, alphasort);
  if (cdn == -1)
    ohshite(_("cannot scan updates directory '%.255s'"), updatefnbuf);

  if (cdn) {
    for (i=0; i<cdn; i++) {
      strcpy(updatefnrest, cdlist[i]->d_name);
      parsedb(updatefnbuf, pdb_parse_update, NULL);
    }

    if (cstatus >= msdbrw_write) {
      writedb(statusfile, wdb_must_sync);

      for (i=0; i<cdn; i++) {
        strcpy(updatefnrest, cdlist[i]->d_name);
        if (unlink(updatefnbuf))
          ohshite(_("failed to remove incorporated update file %.255s"),updatefnbuf);
      }

      dir_sync_path(updatesdir);
    }

    for (i = 0; i < cdn; i++)
      free(cdlist[i]);
  }
  free(cdlist);

  nextupdate= 0;
}

static void createimptmp(void) {
  int i;

  onerr_abort++;

  importanttmp= fopen(importanttmpfile,"w");
  if (!importanttmp)
    ohshite(_("unable to create '%.255s'"), importanttmpfile);
  setcloexec(fileno(importanttmp),importanttmpfile);
  for (i=0; i<512; i++) fputs("#padding\n",importanttmp);
  if (ferror(importanttmp))
    ohshite(_("unable to fill %.250s with padding"),importanttmpfile);
  if (fflush(importanttmp))
    ohshite(_("unable to flush %.250s after padding"), importanttmpfile);
  if (fseek(importanttmp,0,SEEK_SET))
    ohshite(_("unable to seek to start of %.250s after padding"),
	    importanttmpfile);

  onerr_abort--;
}

static const struct fni {
  const char *suffix;
  char **store;
} fnis[] = {
  {   LOCKFILE,                   &lockfile           },
  {   STATUSFILE,                 &statusfile         },
  {   AVAILFILE,                  &availablefile      },
  {   UPDATESDIR,                 &updatesdir         },
  {   UPDATESDIR IMPORTANTTMP,    &importanttmpfile   },
  {   NULL, NULL                                      }
};

void
modstatdb_init(void)
{
  const struct fni *fnip;

  if (db_initialized)
    return;

  for (fnip = fnis; fnip->suffix; fnip++) {
    free(*fnip->store);
    *fnip->store = dpkg_db_get_path(fnip->suffix);
  }

  updatefnbuf = m_malloc(strlen(updatesdir) + IMPORTANTMAXLEN + 5);
  strcpy(updatefnbuf, updatesdir);
  updatefnrest = updatefnbuf + strlen(updatefnbuf);

  db_initialized = true;
}

void
modstatdb_done(void)
{
  const struct fni *fnip;

  if (!db_initialized)
    return;

  for (fnip = fnis; fnip->suffix; fnip++) {
    free(*fnip->store);
    *fnip->store = NULL;
  }
  free(updatefnbuf);

  db_initialized = false;
}

static int dblockfd = -1;

bool
modstatdb_is_locked(void)
{
  int lockfd;
  bool locked;

  if (dblockfd == -1) {
    lockfd = open(lockfile, O_RDONLY);
    if (lockfd == -1)
      ohshite(_("unable to open lock file %s for testing"), lockfile);
  } else {
    lockfd = dblockfd;
  }

  locked = file_is_locked(lockfd, lockfile);

  /* We only close the file if there was no lock open, otherwise we would
   * release the existing lock on close. */
  if (dblockfd == -1)
    close(lockfd);

  return locked;
}

bool
modstatdb_can_lock(void)
{
  if (dblockfd >= 0)
    return true;

  dblockfd = open(lockfile, O_RDWR | O_CREAT | O_TRUNC, 0660);
  if (dblockfd == -1) {
    if (errno == EACCES || errno == EPERM)
      return false;
    else
      ohshite(_("unable to open/create status database lockfile"));
  }

  return true;
}

void
modstatdb_lock(void)
{
  if (!modstatdb_can_lock())
    ohshit(_("you do not have permission to lock the dpkg status database"));

  file_lock(&dblockfd, FILE_LOCK_NOWAIT, lockfile, _("dpkg status database"));
}

void
modstatdb_unlock(void)
{
  /* Unlock. */
  pop_cleanup(ehflag_normaltidy);

  dblockfd = -1;
}

enum modstatdb_rw
modstatdb_open(enum modstatdb_rw readwritereq)
{
  modstatdb_init();

  cflags = readwritereq & msdbrw_available_mask;
  readwritereq &= ~msdbrw_available_mask;

  switch (readwritereq) {
  case msdbrw_needsuperuser:
  case msdbrw_needsuperuserlockonly:
    if (getuid() || geteuid())
      ohshit(_("requested operation requires superuser privilege"));
    /* Fall through. */
  case msdbrw_write: case msdbrw_writeifposs:
    if (access(dpkg_db_get_dir(), W_OK)) {
      if (errno != EACCES)
        ohshite(_("unable to access dpkg status area"));
      else if (readwritereq == msdbrw_write)
        ohshit(_("operation requires read/write access to dpkg status area"));
      cstatus= msdbrw_readonly;
    } else {
      modstatdb_lock();
      cstatus= (readwritereq == msdbrw_needsuperuserlockonly ?
                msdbrw_needsuperuserlockonly :
                msdbrw_write);
    }
    break;
  case msdbrw_readonly:
    cstatus= msdbrw_readonly; break;
  default:
    internerr("unknown modstatdb_rw '%d'", readwritereq);
  }

  dpkg_arch_load_list();

  if (cstatus != msdbrw_needsuperuserlockonly) {
    cleanupdates();
    if (cflags >= msdbrw_available_readonly)
      parsedb(availablefile, pdb_parse_available, NULL);
  }

  if (cstatus >= msdbrw_write) {
    createimptmp();
    varbuf_init(&uvb, 10240);
  }

  trig_fixup_awaiters(cstatus);
  trig_incorporate(cstatus);

  return cstatus;
}

enum modstatdb_rw
modstatdb_get_status(void)
{
  return cstatus;
}

void modstatdb_checkpoint(void) {
  int i;

  assert(cstatus >= msdbrw_write);
  writedb(statusfile, wdb_must_sync);

  for (i=0; i<nextupdate; i++) {
    sprintf(updatefnrest, IMPORTANTFMT, i);
    /* Have we made a real mess? */
    assert(strlen(updatefnrest) <= IMPORTANTMAXLEN);
    if (unlink(updatefnbuf))
      ohshite(_("failed to remove my own update file %.255s"),updatefnbuf);
  }

  dir_sync_path(updatesdir);

  nextupdate= 0;
}

void modstatdb_shutdown(void) {
  if (cflags >= msdbrw_available_write)
    writedb(availablefile, wdb_dump_available);

  switch (cstatus) {
  case msdbrw_write:
    modstatdb_checkpoint();
    /* Tidy up a bit, but don't worry too much about failure. */
    fclose(importanttmp);
    (void)unlink(importanttmpfile);
    varbuf_destroy(&uvb);
    /* Fall through. */
  case msdbrw_needsuperuserlockonly:
    modstatdb_unlock();
  default:
    break;
  }

  pkg_db_reset();

  modstatdb_done();
}

static void
modstatdb_note_core(struct pkginfo *pkg)
{
  assert(cstatus >= msdbrw_write);

  varbuf_reset(&uvb);
  varbufrecord(&uvb, pkg, &pkg->installed);

  if (fwrite(uvb.buf, 1, uvb.used, importanttmp) != uvb.used)
    ohshite(_("unable to write updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));
  if (fflush(importanttmp))
    ohshite(_("unable to flush updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));
  if (ftruncate(fileno(importanttmp), uvb.used))
    ohshite(_("unable to truncate for updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));
  if (fsync(fileno(importanttmp)))
    ohshite(_("unable to fsync updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));
  if (fclose(importanttmp))
    ohshite(_("unable to close updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));
  sprintf(updatefnrest, IMPORTANTFMT, nextupdate);
  if (rename(importanttmpfile, updatefnbuf))
    ohshite(_("unable to install updated status of '%.250s'"),
            pkg_name(pkg, pnaw_nonambig));

  dir_sync_path(updatesdir);

  /* Have we made a real mess? */
  assert(strlen(updatefnrest) <= IMPORTANTMAXLEN);

  nextupdate++;

  if (nextupdate > MAXUPDATES) {
    modstatdb_checkpoint();
    nextupdate = 0;
  }

  createimptmp();
}

/*
 * Note: If anyone wants to set some triggers-pending, they must also
 * set status appropriately, or we will undo it. That is, it is legal
 * to call this when pkg->status and pkg->trigpend_head disagree and
 * in that case pkg->status takes precedence and pkg->trigpend_head
 * will be adjusted.
 */
void modstatdb_note(struct pkginfo *pkg) {
  struct trigaw *ta;

  onerr_abort++;

  /* Clear pending triggers here so that only code that sets the status
   * to interesting (for triggers) values has to care about triggers. */
  if (pkg->status != PKG_STAT_TRIGGERSPENDING &&
      pkg->status != PKG_STAT_TRIGGERSAWAITED)
    pkg->trigpend_head = NULL;

  if (pkg->status <= PKG_STAT_CONFIGFILES) {
    for (ta = pkg->trigaw.head; ta; ta = ta->sameaw.next)
      ta->aw = NULL;
    pkg->trigaw.head = pkg->trigaw.tail = NULL;
  }

  log_message("status %s %s %s", pkg_status_name(pkg),
              pkg_name(pkg, pnaw_always),
	      versiondescribe(&pkg->installed.version, vdew_nonambig));
  statusfd_send("status: %s: %s", pkg_name(pkg, pnaw_nonambig),
                pkg_status_name(pkg));

  if (cstatus >= msdbrw_write)
    modstatdb_note_core(pkg);

  if (!pkg->trigpend_head && pkg->othertrigaw_head) {
    /* Automatically remove us from other packages' Triggers-Awaited.
     * We do this last because we want to maximize our chances of
     * successfully recording the status of the package we were
     * pointed at by our caller, although there is some risk of
     * leaving us in a slightly odd situation which is cleared up
     * by the trigger handling logic in deppossi_ok_found. */
    trig_clear_awaiters(pkg);
  }

  onerr_abort--;
}

void
modstatdb_note_ifwrite(struct pkginfo *pkg)
{
  if (cstatus >= msdbrw_write)
    modstatdb_note(pkg);
}
Commit	Line	Data
1479465f GJ	1	/*
	2	* libdpkg - Debian packaging suite library routines
	3	* dbmodify.c - routines for managing dpkg database updates
	4	*
	5	* Copyright © 1994,1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
	6	* Copyright © 2001 Wichert Akkerman <wichert@debian.org>
	7	* Copyright © 2006-2014 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 <sys/stat.h>
	27	#include <sys/types.h>
	28	#include <sys/wait.h>
	29
	30	#include <assert.h>
	31	#include <errno.h>
	32	#include <limits.h>
	33	#include <string.h>
	34	#include <time.h>
	35	#include <fcntl.h>
	36	#include <dirent.h>
	37	#include <unistd.h>
	38	#include <stdbool.h>
	39	#include <stdlib.h>
	40	#include <stdio.h>
	41
	42	#include <dpkg/i18n.h>
	43	#include <dpkg/c-ctype.h>
	44	#include <dpkg/dpkg.h>
	45	#include <dpkg/dpkg-db.h>
	46	#include <dpkg/file.h>
	47	#include <dpkg/dir.h>
	48	#include <dpkg/triglib.h>
	49
	50	static bool db_initialized;
	51
	52	static enum modstatdb_rw cstatus=-1, cflags=0;
	53	static char *lockfile;
	54	static char statusfile, availablefile;
	55	static char *importanttmpfile=NULL;
	56	static FILE *importanttmp;
	57	static int nextupdate;
	58	static char *updatesdir;
	59	static int updateslength;
	60	static char updatefnbuf, updatefnrest;
	61	static struct varbuf uvb;
	62
	63	static int ulist_select(const struct dirent *de) {
	64	const char *p;
65	int l;
66	for (p= de->d_name, l=0; *p; p++, l++)
67	if (!c_isdigit(*p))
68	return 0;
69	if (l > IMPORTANTMAXLEN)
70	ohshit(_("updates directory contains file '%.250s' whose name is too long "
71	"(length=%d, max=%d)"), de->d_name, l, IMPORTANTMAXLEN);
72	if (updateslength == -1) updateslength= l;
73	else if (l != updateslength)
74	ohshit(_("updates directory contains files with different length names "
75	"(both %d and %d)"), l, updateslength);
76	return 1;
77	}
78
79	static void cleanupdates(void) {
80	struct dirent **cdlist;
81	int cdn, i;
82
83	parsedb(statusfile, pdb_parse_status, NULL);
84
85	*updatefnrest = '\0';
86	updateslength= -1;
87	cdn= scandir(updatefnbuf, &cdlist, &ulist_select, alphasort);
88	if (cdn == -1)
89	ohshite(_("cannot scan updates directory '%.255s'"), updatefnbuf);
90
91	if (cdn) {
92	for (i=0; i<cdn; i++) {
93	strcpy(updatefnrest, cdlist[i]->d_name);
94	parsedb(updatefnbuf, pdb_parse_update, NULL);
95	}
96
97	if (cstatus >= msdbrw_write) {
98	writedb(statusfile, wdb_must_sync);
99
100	for (i=0; i<cdn; i++) {
101	strcpy(updatefnrest, cdlist[i]->d_name);
102	if (unlink(updatefnbuf))
103	ohshite(_("failed to remove incorporated update file %.255s"),updatefnbuf);
104	}
105
106	dir_sync_path(updatesdir);
107	}
108
109	for (i = 0; i < cdn; i++)
110	free(cdlist[i]);
111	}
112	free(cdlist);
113
114	nextupdate= 0;
115	}
116
117	static void createimptmp(void) {
118	int i;
119
120	onerr_abort++;
121
122	importanttmp= fopen(importanttmpfile,"w");
123	if (!importanttmp)
124	ohshite(_("unable to create '%.255s'"), importanttmpfile);
125	setcloexec(fileno(importanttmp),importanttmpfile);
126	for (i=0; i<512; i++) fputs("#padding\n",importanttmp);
127	if (ferror(importanttmp))
128	ohshite(_("unable to fill %.250s with padding"),importanttmpfile);
129	if (fflush(importanttmp))
130	ohshite(_("unable to flush %.250s after padding"), importanttmpfile);
131	if (fseek(importanttmp,0,SEEK_SET))
132	ohshite(_("unable to seek to start of %.250s after padding"),
133	importanttmpfile);
134
135	onerr_abort--;
136	}
137
138	static const struct fni {
139	const char *suffix;
140	char **store;
141	} fnis[] = {
142	{ LOCKFILE, &lockfile },
143	{ STATUSFILE, &statusfile },
144	{ AVAILFILE, &availablefile },
145	{ UPDATESDIR, &updatesdir },
146	{ UPDATESDIR IMPORTANTTMP, &importanttmpfile },
147	{ NULL, NULL }
148	};
149
150	void
151	modstatdb_init(void)
152	{
153	const struct fni *fnip;
154
155	if (db_initialized)
156	return;
157
158	for (fnip = fnis; fnip->suffix; fnip++) {
159	free(*fnip->store);
160	*fnip->store = dpkg_db_get_path(fnip->suffix);
161	}
162
163	updatefnbuf = m_malloc(strlen(updatesdir) + IMPORTANTMAXLEN + 5);
164	strcpy(updatefnbuf, updatesdir);
165	updatefnrest = updatefnbuf + strlen(updatefnbuf);
166
167	db_initialized = true;
168	}
169
170	void
171	modstatdb_done(void)
172	{
173	const struct fni *fnip;
174
175	if (!db_initialized)
176	return;
177
178	for (fnip = fnis; fnip->suffix; fnip++) {
179	free(*fnip->store);
180	*fnip->store = NULL;
181	}
182	free(updatefnbuf);
183
184	db_initialized = false;
185	}
186
187	static int dblockfd = -1;
188
189	bool
190	modstatdb_is_locked(void)
191	{
192	int lockfd;
193	bool locked;
194
195	if (dblockfd == -1) {
196	lockfd = open(lockfile, O_RDONLY);
197	if (lockfd == -1)
198	ohshite(_("unable to open lock file %s for testing"), lockfile);
199	} else {
200	lockfd = dblockfd;
201	}
202
203	locked = file_is_locked(lockfd, lockfile);
204
205	/* We only close the file if there was no lock open, otherwise we would
206	* release the existing lock on close. */
207	if (dblockfd == -1)
208	close(lockfd);
209
210	return locked;
211	}
212
213	bool
214	modstatdb_can_lock(void)
215	{
216	if (dblockfd >= 0)
217	return true;
218
219	dblockfd = open(lockfile, O_RDWR \| O_CREAT \| O_TRUNC, 0660);
220	if (dblockfd == -1) {
221	if (errno == EACCES \|\| errno == EPERM)
222	return false;
223	else
224	ohshite(_("unable to open/create status database lockfile"));
225	}
226
227	return true;
228	}
229
230	void
231	modstatdb_lock(void)
232	{
233	if (!modstatdb_can_lock())
234	ohshit(_("you do not have permission to lock the dpkg status database"));
235
236	file_lock(&dblockfd, FILE_LOCK_NOWAIT, lockfile, _("dpkg status database"));
237	}
238
239	void
240	modstatdb_unlock(void)
241	{
242	/* Unlock. */
243	pop_cleanup(ehflag_normaltidy);
244
245	dblockfd = -1;
246	}
247
248	enum modstatdb_rw
249	modstatdb_open(enum modstatdb_rw readwritereq)
250	{
251	modstatdb_init();
252
253	cflags = readwritereq & msdbrw_available_mask;
254	readwritereq &= ~msdbrw_available_mask;
255
256	switch (readwritereq) {
257	case msdbrw_needsuperuser:
258	case msdbrw_needsuperuserlockonly:
259	if (getuid() \|\| geteuid())
260	ohshit(_("requested operation requires superuser privilege"));
261	/* Fall through. */
262	case msdbrw_write: case msdbrw_writeifposs:
263	if (access(dpkg_db_get_dir(), W_OK)) {
264	if (errno != EACCES)
265	ohshite(_("unable to access dpkg status area"));
266	else if (readwritereq == msdbrw_write)
267	ohshit(_("operation requires read/write access to dpkg status area"));
268	cstatus= msdbrw_readonly;
269	} else {
270	modstatdb_lock();
271	cstatus= (readwritereq == msdbrw_needsuperuserlockonly ?
272	msdbrw_needsuperuserlockonly :
273	msdbrw_write);
274	}
275	break;
276	case msdbrw_readonly:
277	cstatus= msdbrw_readonly; break;
278	default:
279	internerr("unknown modstatdb_rw '%d'", readwritereq);
280	}
281
282	dpkg_arch_load_list();
283
284	if (cstatus != msdbrw_needsuperuserlockonly) {
285	cleanupdates();
286	if (cflags >= msdbrw_available_readonly)
287	parsedb(availablefile, pdb_parse_available, NULL);
288	}
289
290	if (cstatus >= msdbrw_write) {
291	createimptmp();
292	varbuf_init(&uvb, 10240);
293	}
294
295	trig_fixup_awaiters(cstatus);
296	trig_incorporate(cstatus);
297
298	return cstatus;
299	}
300
301	enum modstatdb_rw
302	modstatdb_get_status(void)
303	{
304	return cstatus;
305	}
306
307	void modstatdb_checkpoint(void) {
308	int i;
309
310	assert(cstatus >= msdbrw_write);
311	writedb(statusfile, wdb_must_sync);
312
313	for (i=0; i<nextupdate; i++) {
314	sprintf(updatefnrest, IMPORTANTFMT, i);
315	/* Have we made a real mess? */
316	assert(strlen(updatefnrest) <= IMPORTANTMAXLEN);
317	if (unlink(updatefnbuf))
318	ohshite(_("failed to remove my own update file %.255s"),updatefnbuf);
319	}
320
321	dir_sync_path(updatesdir);
322
323	nextupdate= 0;
324	}
325
326	void modstatdb_shutdown(void) {
327	if (cflags >= msdbrw_available_write)
328	writedb(availablefile, wdb_dump_available);
329
330	switch (cstatus) {
331	case msdbrw_write:
332	modstatdb_checkpoint();
333	/* Tidy up a bit, but don't worry too much about failure. */
334	fclose(importanttmp);
335	(void)unlink(importanttmpfile);
336	varbuf_destroy(&uvb);
337	/* Fall through. */
338	case msdbrw_needsuperuserlockonly:
339	modstatdb_unlock();
340	default:
341	break;
342	}
343
344	pkg_db_reset();
345
346	modstatdb_done();
347	}
348
349	static void
350	modstatdb_note_core(struct pkginfo *pkg)
351	{
352	assert(cstatus >= msdbrw_write);
353
354	varbuf_reset(&uvb);
355	varbufrecord(&uvb, pkg, &pkg->installed);
356
357	if (fwrite(uvb.buf, 1, uvb.used, importanttmp) != uvb.used)
358	ohshite(_("unable to write updated status of '%.250s'"),
359	pkg_name(pkg, pnaw_nonambig));
360	if (fflush(importanttmp))
361	ohshite(_("unable to flush updated status of '%.250s'"),
362	pkg_name(pkg, pnaw_nonambig));
363	if (ftruncate(fileno(importanttmp), uvb.used))
364	ohshite(_("unable to truncate for updated status of '%.250s'"),
365	pkg_name(pkg, pnaw_nonambig));
366	if (fsync(fileno(importanttmp)))
367	ohshite(_("unable to fsync updated status of '%.250s'"),
368	pkg_name(pkg, pnaw_nonambig));
369	if (fclose(importanttmp))
370	ohshite(_("unable to close updated status of '%.250s'"),
371	pkg_name(pkg, pnaw_nonambig));
372	sprintf(updatefnrest, IMPORTANTFMT, nextupdate);
373	if (rename(importanttmpfile, updatefnbuf))
374	ohshite(_("unable to install updated status of '%.250s'"),
375	pkg_name(pkg, pnaw_nonambig));
376
377	dir_sync_path(updatesdir);
378
379	/* Have we made a real mess? */
380	assert(strlen(updatefnrest) <= IMPORTANTMAXLEN);
381
382	nextupdate++;
383
384	if (nextupdate > MAXUPDATES) {
385	modstatdb_checkpoint();
386	nextupdate = 0;
387	}
388
389	createimptmp();
390	}
391
392	/*
393	* Note: If anyone wants to set some triggers-pending, they must also
394	* set status appropriately, or we will undo it. That is, it is legal
395	* to call this when pkg->status and pkg->trigpend_head disagree and
396	* in that case pkg->status takes precedence and pkg->trigpend_head
397	* will be adjusted.
398	*/
399	void modstatdb_note(struct pkginfo *pkg) {
400	struct trigaw *ta;
401
402	onerr_abort++;
403
404	/* Clear pending triggers here so that only code that sets the status
405	* to interesting (for triggers) values has to care about triggers. */
406	if (pkg->status != PKG_STAT_TRIGGERSPENDING &&
407	pkg->status != PKG_STAT_TRIGGERSAWAITED)
408	pkg->trigpend_head = NULL;
409
410	if (pkg->status <= PKG_STAT_CONFIGFILES) {
411	for (ta = pkg->trigaw.head; ta; ta = ta->sameaw.next)
412	ta->aw = NULL;
413	pkg->trigaw.head = pkg->trigaw.tail = NULL;
414	}
415
416	log_message("status %s %s %s", pkg_status_name(pkg),
417	pkg_name(pkg, pnaw_always),
418	versiondescribe(&pkg->installed.version, vdew_nonambig));
419	statusfd_send("status: %s: %s", pkg_name(pkg, pnaw_nonambig),
420	pkg_status_name(pkg));
421
422	if (cstatus >= msdbrw_write)
423	modstatdb_note_core(pkg);
424
425	if (!pkg->trigpend_head && pkg->othertrigaw_head) {
426	/* Automatically remove us from other packages' Triggers-Awaited.
427	* We do this last because we want to maximize our chances of
428	* successfully recording the status of the package we were
429	* pointed at by our caller, although there is some risk of
430	* leaving us in a slightly odd situation which is cleared up
431	* by the trigger handling logic in deppossi_ok_found. */
432	trig_clear_awaiters(pkg);
433	}
434
435	onerr_abort--;
436	}
437
438	void
439	modstatdb_note_ifwrite(struct pkginfo *pkg)
440	{
441	if (cstatus >= msdbrw_write)
442	modstatdb_note(pkg);
443	}
444