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|
/*
* dpkg - main program for package management
* packages.c - common to actions that process packages
*
* Copyright © 1994,1995 Ian Jackson <ian@chiark.greenend.org.uk>
* Copyright © 2006-2014 Guillem Jover <guillem@debian.org>
* Copyright © 2011 Linaro Limited
* Copyright © 2011 Raphaël Hertzog <hertzog@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/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <dpkg/i18n.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/pkg-list.h>
#include <dpkg/pkg-queue.h>
#include <dpkg/string.h>
#include <dpkg/options.h>
#include "filesdb.h"
#include "infodb.h"
#include "main.h"
static struct pkginfo *progress_bytrigproc;
static struct pkg_queue queue = PKG_QUEUE_INIT;
int sincenothing = 0, dependtry = 0;
void
enqueue_package(struct pkginfo *pkg)
{
ensure_package_clientdata(pkg);
if (pkg->clientdata->enqueued)
return;
pkg->clientdata->enqueued = true;
pkg_queue_push(&queue, pkg);
}
static void
enqueue_pending(void)
{
struct pkgiterator *it;
struct pkginfo *pkg;
it = pkg_db_iter_new();
while ((pkg = pkg_db_iter_next_pkg(it)) != NULL) {
switch (cipaction->arg_int) {
case act_configure:
if (!(pkg->status == PKG_STAT_UNPACKED ||
pkg->status == PKG_STAT_HALFCONFIGURED ||
pkg->trigpend_head))
continue;
if (pkg->want != PKG_WANT_INSTALL)
continue;
break;
case act_triggers:
if (!pkg->trigpend_head)
continue;
if (pkg->want != PKG_WANT_INSTALL)
continue;
break;
case act_remove:
case act_purge:
if (pkg->want != PKG_WANT_PURGE) {
if (pkg->want != PKG_WANT_DEINSTALL)
continue;
if (pkg->status == PKG_STAT_CONFIGFILES)
continue;
}
if (pkg->status == PKG_STAT_NOTINSTALLED)
continue;
break;
default:
internerr("unknown action '%d'", cipaction->arg_int);
}
enqueue_package(pkg);
}
pkg_db_iter_free(it);
}
static void
enqueue_specified(const char *const *argv)
{
const char *thisarg;
while ((thisarg = *argv++) != NULL) {
struct pkginfo *pkg;
pkg = dpkg_options_parse_pkgname(cipaction, thisarg);
if (pkg->status == PKG_STAT_NOTINSTALLED &&
str_match_end(pkg->set->name, DEBEXT)) {
badusage(_("you must specify packages by their own names, "
"not by quoting the names of the files they come in"));
}
enqueue_package(pkg);
}
}
int
packages(const char *const *argv)
{
trigproc_install_hooks();
modstatdb_open(f_noact ? msdbrw_readonly :
fc_nonroot ? msdbrw_write :
msdbrw_needsuperuser);
checkpath();
pkg_infodb_upgrade();
log_message("startup packages %s", cipaction->olong);
if (f_pending) {
if (*argv)
badusage(_("--%s --pending does not take any non-option arguments"),cipaction->olong);
enqueue_pending();
} else {
if (!*argv)
badusage(_("--%s needs at least one package name argument"), cipaction->olong);
enqueue_specified(argv);
}
ensure_diversions();
process_queue();
trigproc_run_deferred();
modstatdb_shutdown();
return 0;
}
void process_queue(void) {
struct pkg_list *rundown;
struct pkginfo *volatile pkg;
volatile enum action action_todo;
jmp_buf ejbuf;
enum pkg_istobe istobe = PKG_ISTOBE_NORMAL;
if (abort_processing)
return;
clear_istobes();
switch (cipaction->arg_int) {
case act_triggers:
case act_configure:
case act_install:
istobe = PKG_ISTOBE_INSTALLNEW;
break;
case act_remove:
case act_purge:
istobe = PKG_ISTOBE_REMOVE;
break;
default:
internerr("unknown action '%d'", cipaction->arg_int);
}
for (rundown = queue.head; rundown; rundown = rundown->next) {
ensure_package_clientdata(rundown->pkg);
if (rundown->pkg->clientdata->istobe == istobe) {
/* Erase the queue entry - this is a second copy! */
switch (cipaction->arg_int) {
case act_triggers:
case act_configure: case act_remove: case act_purge:
printf(_("Package %s listed more than once, only processing once.\n"),
pkg_name(rundown->pkg, pnaw_nonambig));
break;
case act_install:
printf(_("More than one copy of package %s has been unpacked\n"
" in this run ! Only configuring it once.\n"),
pkg_name(rundown->pkg, pnaw_nonambig));
break;
default:
internerr("unknown action '%d'", cipaction->arg_int);
}
rundown->pkg = NULL;
} else {
rundown->pkg->clientdata->istobe= istobe;
}
}
while (!pkg_queue_is_empty(&queue)) {
pkg = pkg_queue_pop(&queue);
if (!pkg)
continue; /* Duplicate, which we removed earlier. */
ensure_package_clientdata(pkg);
pkg->clientdata->enqueued = false;
action_todo = cipaction->arg_int;
if (sincenothing++ > queue.length * 2 + 2) {
if (progress_bytrigproc && progress_bytrigproc->trigpend_head) {
enqueue_package(pkg);
pkg = progress_bytrigproc;
action_todo = act_configure;
} else {
dependtry++;
sincenothing = 0;
assert(dependtry <= 4);
}
}
debug(dbg_general, "process queue pkg %s queue.len %d progress %d, try %d",
pkg_name(pkg, pnaw_always), queue.length, sincenothing, dependtry);
if (pkg->status > PKG_STAT_INSTALLED)
internerr("package status (%d) > PKG_STAT_INSTALLED", pkg->status);
if (setjmp(ejbuf)) {
/* Give up on it from the point of view of other packages, i.e. reset
* istobe. */
pkg->clientdata->istobe = PKG_ISTOBE_NORMAL;
pop_error_context(ehflag_bombout);
if (abort_processing)
return;
continue;
}
push_error_context_jump(&ejbuf, print_error_perpackage,
pkg_name(pkg, pnaw_nonambig));
switch (action_todo) {
case act_triggers:
if (!pkg->trigpend_head)
ohshit(_("package %.250s is not ready for trigger processing\n"
" (current status `%.250s' with no pending triggers)"),
pkg_name(pkg, pnaw_nonambig), pkg_status_name(pkg));
/* Fall through. */
case act_install:
/* Don't try to configure pkgs that we've just disappeared. */
if (pkg->status == PKG_STAT_NOTINSTALLED)
break;
/* Fall through. */
case act_configure:
/* Do whatever is most needed. */
if (pkg->trigpend_head)
trigproc(pkg);
else
deferred_configure(pkg);
break;
case act_remove: case act_purge:
deferred_remove(pkg);
break;
default:
internerr("unknown action '%d'", cipaction->arg_int);
}
m_output(stdout, _("<standard output>"));
m_output(stderr, _("<standard error>"));
pop_error_context(ehflag_normaltidy);
}
assert(!queue.length);
}
/*** Dependency processing - common to --configure and --remove. ***/
/*
* The algorithm for deciding what to configure or remove first is as
* follows:
*
* Loop through all packages doing a ‘try 1’ until we've been round and
* nothing has been done, then do ‘try 2’ and ‘try 3’ likewise.
*
* When configuring, in each try we check to see whether all
* dependencies of this package are done. If so we do it. If some of
* the dependencies aren't done yet but will be later we defer the
* package, otherwise it is an error.
*
* When removing, in each try we check to see whether there are any
* packages that would have dependencies missing if we removed this
* one. If not we remove it now. If some of these packages are
* themselves scheduled for removal we defer the package until they
* have been done.
*
* The criteria for satisfying a dependency vary with the various
* tries. In try 1 we treat the dependencies as absolute. In try 2 we
* check break any cycles in the dependency graph involving the package
* we are trying to process before trying to process the package
* normally. In try 3 (which should only be reached if
* --force-depends-version is set) we ignore version number clauses in
* Depends lines. In try 4 (only reached if --force-depends is set) we
* say "ok" regardless.
*
* If we are configuring and one of the packages we depend on is
* awaiting configuration but wasn't specified in the argument list we
* will add it to the argument list if --configure-any is specified.
* In this case we note this as having "done something" so that we
* don't needlessly escalate to higher levels of dependency checking
* and breaking.
*/
enum found_status {
FOUND_NONE = 0,
FOUND_DEFER = 1,
FOUND_FORCED = 2,
FOUND_OK = 3,
};
/*
* Return values:
* 0: cannot be satisfied.
* 1: defer: may be satisfied later, when other packages are better or
* at higher dependtry due to --force
* will set *fixbytrig to package whose trigger processing would help
* if applicable (and leave it alone otherwise).
* 2: not satisfied but forcing
* (*interestingwarnings >= 0 on exit? caller is to print oemsgs).
* 3: satisfied now.
*/
static enum found_status
deppossi_ok_found(struct pkginfo *possdependee, struct pkginfo *requiredby,
struct pkginfo *removing, struct deppossi *provider,
struct pkginfo **fixbytrig,
bool *matched, struct deppossi *checkversion,
int *interestingwarnings, struct varbuf *oemsgs)
{
enum found_status thisf;
if (ignore_depends(possdependee)) {
debug(dbg_depcondetail," ignoring depended package so ok and found");
return FOUND_OK;
}
thisf = FOUND_NONE;
if (possdependee == removing) {
if (provider) {
varbuf_printf(oemsgs,
_(" Package %s which provides %s is to be removed.\n"),
pkg_name(possdependee, pnaw_nonambig),
provider->ed->name);
} else {
varbuf_printf(oemsgs, _(" Package %s is to be removed.\n"),
pkg_name(possdependee, pnaw_nonambig));
}
*matched = true;
debug(dbg_depcondetail," removing possdependee, returning %d",thisf);
return thisf;
}
switch (possdependee->status) {
case PKG_STAT_UNPACKED:
case PKG_STAT_HALFCONFIGURED:
case PKG_STAT_TRIGGERSAWAITED:
case PKG_STAT_TRIGGERSPENDING:
case PKG_STAT_INSTALLED:
if (checkversion) {
if (provider) {
debug(dbg_depcondetail, " checking package %s provided by pkg %s",
checkversion->ed->name, pkg_name(possdependee, pnaw_always));
if (!pkg_virtual_deppossi_satisfied(checkversion, provider)) {
varbuf_printf(oemsgs,
_(" Version of %s on system, provided by %s, is %s.\n"),
checkversion->ed->name,
pkg_name(possdependee, pnaw_always),
versiondescribe(&provider->version, vdew_nonambig));
if (fc_dependsversion)
thisf = (dependtry >= 3) ? FOUND_FORCED : FOUND_DEFER;
debug(dbg_depcondetail, " bad version");
goto unsuitable;
}
} else {
debug(dbg_depcondetail, " checking non-provided pkg %s",
pkg_name(possdependee, pnaw_always));
if (!versionsatisfied(&possdependee->installed, checkversion)) {
varbuf_printf(oemsgs, _(" Version of %s on system is %s.\n"),
pkg_name(possdependee, pnaw_nonambig),
versiondescribe(&possdependee->installed.version,
vdew_nonambig));
if (fc_dependsversion)
thisf = (dependtry >= 3) ? FOUND_FORCED : FOUND_DEFER;
debug(dbg_depcondetail, " bad version");
goto unsuitable;
}
}
}
if (possdependee->status == PKG_STAT_INSTALLED ||
possdependee->status == PKG_STAT_TRIGGERSPENDING) {
debug(dbg_depcondetail," is installed, ok and found");
return FOUND_OK;
}
if (possdependee->status == PKG_STAT_TRIGGERSAWAITED) {
assert(possdependee->trigaw.head);
if (removing ||
!(f_triggers ||
possdependee->clientdata->istobe == PKG_ISTOBE_INSTALLNEW)) {
if (provider) {
varbuf_printf(oemsgs,
_(" Package %s which provides %s awaits trigger processing.\n"),
pkg_name(possdependee, pnaw_nonambig),
provider->ed->name);
} else {
varbuf_printf(oemsgs,
_(" Package %s awaits trigger processing.\n"),
pkg_name(possdependee, pnaw_nonambig));
}
debug(dbg_depcondetail, " triggers-awaited, no fixbytrig");
goto unsuitable;
}
/* If we have a dependency cycle where a package A awaits trigger
* processing and package P has them pending, and both depend on each
* other, the dependency cycle breaking code is not smart enough to
* break it at the correct place, as the relationship is directional.
* So we handle it specially here.
*
* Otherwise we just defer it, but do not record that it can be fixed
* by trigger processing, because we would get into an inifite loop. */
if (requiredby == possdependee->trigaw.head->pend) {
if (dependtry > 1) {
debug(dbg_depcondetail, " triggers-awaited, fixed by us, "
"break cycle so ok and found");
return FOUND_OK;
} else {
debug(dbg_depcondetail, " triggers-awaited, fixed by us, defer");
return FOUND_DEFER;
}
}
/* We don't check the status of trigaw.head->pend here, just in case
* we get into the pathological situation where Triggers-Awaited but
* the named package doesn't actually have any pending triggers. In
* that case we queue the non-pending package for trigger processing
* anyway, and that trigger processing will be a noop except for
* sorting out all of the packages which name it in Triggers-Awaited.
*
* (This situation can only arise if modstatdb_note success in
* clearing the triggers-pending status of the pending package
* but then fails to go on to update the awaiters.) */
*fixbytrig = possdependee->trigaw.head->pend;
debug(dbg_depcondetail,
" triggers-awaited, fixbytrig '%s', defer",
pkg_name(*fixbytrig, pnaw_always));
return FOUND_DEFER;
}
if (possdependee->clientdata &&
possdependee->clientdata->istobe == PKG_ISTOBE_INSTALLNEW) {
debug(dbg_depcondetail," unpacked/halfconfigured, defer");
return FOUND_DEFER;
} else if (!removing && fc_configureany &&
!skip_due_to_hold(possdependee) &&
!(possdependee->status == PKG_STAT_HALFCONFIGURED)) {
notice(_("also configuring '%s' (required by '%s')"),
pkg_name(possdependee, pnaw_nonambig),
pkg_name(requiredby, pnaw_nonambig));
enqueue_package(possdependee);
sincenothing = 0;
return FOUND_DEFER;
} else {
if (provider) {
varbuf_printf(oemsgs,
_(" Package %s which provides %s is not configured yet.\n"),
pkg_name(possdependee, pnaw_nonambig),
provider->ed->name);
} else {
varbuf_printf(oemsgs, _(" Package %s is not configured yet.\n"),
pkg_name(possdependee, pnaw_nonambig));
}
debug(dbg_depcondetail, " not configured/able");
goto unsuitable;
}
default:
if (provider) {
varbuf_printf(oemsgs,
_(" Package %s which provides %s is not installed.\n"),
pkg_name(possdependee, pnaw_nonambig),
provider->ed->name);
} else {
varbuf_printf(oemsgs, _(" Package %s is not installed.\n"),
pkg_name(possdependee, pnaw_nonambig));
}
debug(dbg_depcondetail, " not installed");
goto unsuitable;
}
unsuitable:
debug(dbg_depcondetail, " returning %d", thisf);
(*interestingwarnings)++;
return thisf;
}
static void
breaks_check_one(struct varbuf *aemsgs, enum dep_check *ok,
struct deppossi *breaks, struct pkginfo *broken,
struct pkginfo *breaker, struct deppossi *virtbroken)
{
struct varbuf depmsg = VARBUF_INIT;
debug(dbg_depcondetail, " checking breaker %s virtbroken %s",
pkg_name(breaker, pnaw_always),
virtbroken ? virtbroken->ed->name : "<none>");
if (breaker->status == PKG_STAT_NOTINSTALLED ||
breaker->status == PKG_STAT_CONFIGFILES)
return;
if (broken == breaker) return;
if (!versionsatisfied(&broken->installed, breaks)) return;
/* The test below can only trigger if dep_breaks start having
* arch qualifiers different from “any”. */
if (!archsatisfied(&broken->installed, breaks))
return;
if (ignore_depends(breaker)) return;
if (virtbroken && ignore_depends(&virtbroken->ed->pkg))
return;
if (virtbroken && !pkg_virtual_deppossi_satisfied(breaks, virtbroken))
return;
varbufdependency(&depmsg, breaks->up);
varbuf_end_str(&depmsg);
varbuf_printf(aemsgs, _(" %s (%s) breaks %s and is %s.\n"),
pkg_name(breaker, pnaw_nonambig),
versiondescribe(&breaker->installed.version, vdew_nonambig),
depmsg.buf, gettext(statusstrings[breaker->status]));
varbuf_destroy(&depmsg);
if (virtbroken) {
varbuf_printf(aemsgs, _(" %s (%s) provides %s.\n"),
pkg_name(broken, pnaw_nonambig),
versiondescribe(&broken->installed.version, vdew_nonambig),
virtbroken->ed->name);
} else if (breaks->verrel != DPKG_RELATION_NONE) {
varbuf_printf(aemsgs, _(" Version of %s to be configured is %s.\n"),
pkg_name(broken, pnaw_nonambig),
versiondescribe(&broken->installed.version, vdew_nonambig));
if (fc_dependsversion) return;
}
if (force_breaks(breaks)) return;
*ok = DEP_CHECK_HALT;
}
static void
breaks_check_target(struct varbuf *aemsgs, enum dep_check *ok,
struct pkginfo *broken, struct pkgset *target,
struct deppossi *virtbroken)
{
struct deppossi *possi;
for (possi = target->depended.installed; possi; possi = possi->rev_next) {
if (possi->up->type != dep_breaks) continue;
breaks_check_one(aemsgs, ok, possi, broken, possi->up->up, virtbroken);
}
}
enum dep_check
breakses_ok(struct pkginfo *pkg, struct varbuf *aemsgs)
{
struct dependency *dep;
struct deppossi *virtbroken;
enum dep_check ok = DEP_CHECK_OK;
debug(dbg_depcon, " checking Breaks");
breaks_check_target(aemsgs, &ok, pkg, pkg->set, NULL);
for (dep= pkg->installed.depends; dep; dep= dep->next) {
if (dep->type != dep_provides) continue;
virtbroken = dep->list;
debug(dbg_depcondetail, " checking virtbroken %s", virtbroken->ed->name);
breaks_check_target(aemsgs, &ok, pkg, virtbroken->ed, virtbroken);
}
return ok;
}
/*
* Checks [Pre]-Depends only.
*/
enum dep_check
dependencies_ok(struct pkginfo *pkg, struct pkginfo *removing,
struct varbuf *aemsgs)
{
/* Valid values: 2 = ok, 1 = defer, 0 = halt. */
enum dep_check ok;
/* Valid values: 0 = none, 1 = defer, 2 = withwarning, 3 = ok. */
enum found_status found, thisf;
int interestingwarnings;
bool matched, anycannotfixbytrig;
struct varbuf oemsgs = VARBUF_INIT;
struct dependency *dep;
struct deppossi *possi, *provider;
struct pkginfo *possfixbytrig, *canfixbytrig;
interestingwarnings= 0;
ok = DEP_CHECK_OK;
debug(dbg_depcon,"checking dependencies of %s (- %s)",
pkg_name(pkg, pnaw_always),
removing ? pkg_name(removing, pnaw_always) : "<none>");
anycannotfixbytrig = false;
canfixbytrig = NULL;
for (dep= pkg->installed.depends; dep; dep= dep->next) {
if (dep->type != dep_depends && dep->type != dep_predepends) continue;
debug(dbg_depcondetail," checking group ...");
matched = false;
varbuf_reset(&oemsgs);
found = FOUND_NONE;
possfixbytrig = NULL;
for (possi = dep->list; found != FOUND_OK && possi; possi = possi->next) {
struct deppossi_pkg_iterator *possi_iter;
struct pkginfo *pkg_pos;
debug(dbg_depcondetail," checking possibility -> %s",possi->ed->name);
if (possi->cyclebreak) {
debug(dbg_depcondetail," break cycle so ok and found");
found = FOUND_OK;
break;
}
thisf = FOUND_NONE;
possi_iter = deppossi_pkg_iter_new(possi, wpb_installed);
while ((pkg_pos = deppossi_pkg_iter_next(possi_iter))) {
thisf = deppossi_ok_found(pkg_pos, pkg, removing, NULL,
&possfixbytrig, &matched, possi,
&interestingwarnings, &oemsgs);
if (thisf > found)
found = thisf;
if (found == FOUND_OK)
break;
}
deppossi_pkg_iter_free(possi_iter);
if (found != FOUND_OK) {
for (provider = possi->ed->depended.installed;
found != FOUND_OK && provider;
provider = provider->rev_next) {
if (provider->up->type != dep_provides)
continue;
debug(dbg_depcondetail, " checking provider %s",
pkg_name(provider->up->up, pnaw_always));
if (!deparchsatisfied(&provider->up->up->installed, provider->arch,
possi)) {
debug(dbg_depcondetail, " provider does not satisfy arch");
continue;
}
thisf = deppossi_ok_found(provider->up->up, pkg, removing, provider,
&possfixbytrig, &matched, possi,
&interestingwarnings, &oemsgs);
if (thisf == FOUND_DEFER && provider->up->up == pkg && !removing) {
/* IOW, if the pkg satisfies its own dep (via a provide), then
* we let it pass, even if it isn't configured yet (as we're
* installing it). */
thisf = FOUND_OK;
}
if (thisf > found)
found = thisf;
}
}
debug(dbg_depcondetail," found %d",found);
if (thisf > found) found= thisf;
}
if (fc_depends) {
thisf = (dependtry >= 4) ? FOUND_FORCED : FOUND_DEFER;
if (thisf > found) {
found = thisf;
debug(dbg_depcondetail, " rescued by force-depends, found %d", found);
}
}
debug(dbg_depcondetail, " found %d matched %d possfixbytrig %s",
found, matched,
possfixbytrig ? pkg_name(possfixbytrig, pnaw_always) : "-");
if (removing && !matched) continue;
switch (found) {
case FOUND_NONE:
anycannotfixbytrig = true;
ok = DEP_CHECK_HALT;
/* Fall through. */
case FOUND_FORCED:
varbuf_add_str(aemsgs, " ");
varbuf_add_pkgbin_name(aemsgs, pkg, &pkg->installed, pnaw_nonambig);
varbuf_add_str(aemsgs, _(" depends on "));
varbufdependency(aemsgs, dep);
if (interestingwarnings) {
/* Don't print the line about the package to be removed if
* that's the only line. */
varbuf_end_str(&oemsgs);
varbuf_add_str(aemsgs, _("; however:\n"));
varbuf_add_str(aemsgs, oemsgs.buf);
} else {
varbuf_add_str(aemsgs, ".\n");
}
break;
case FOUND_DEFER:
if (possfixbytrig)
canfixbytrig = possfixbytrig;
else
anycannotfixbytrig = true;
if (ok > DEP_CHECK_DEFER)
ok = DEP_CHECK_DEFER;
break;
case FOUND_OK:
break;
default:
internerr("unknown value for found '%d'", found);
}
}
if (ok == DEP_CHECK_HALT &&
(pkg->clientdata && pkg->clientdata->istobe == PKG_ISTOBE_REMOVE))
ok = DEP_CHECK_DEFER;
if (!anycannotfixbytrig && canfixbytrig)
progress_bytrigproc = canfixbytrig;
varbuf_destroy(&oemsgs);
debug(dbg_depcon,"ok %d msgs >>%.*s<<", ok, (int)aemsgs->used, aemsgs->buf);
return ok;
}
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