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-rw-r--r--src/packages.c758
1 files changed, 758 insertions, 0 deletions
diff --git a/src/packages.c b/src/packages.c
new file mode 100644
index 0000000..9c4b75c
--- /dev/null
+++ b/src/packages.c
@@ -0,0 +1,758 @@
+/*
+ * dpkg - main program for package management
+ * packages.c - common to actions that process packages
+ *
+ * Copyright © 1994,1995 Ian Jackson <ijackson@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 <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 <dpkg/db-ctrl.h>
+#include <dpkg/db-fsys.h>
+
+#include "main.h"
+
+static struct pkginfo *progress_bytrigproc;
+static struct pkg_queue queue = PKG_QUEUE_INIT;
+
+enum dependtry dependtry = DEPEND_TRY_NORMAL;
+int sincenothing = 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);
+}
+
+void
+enqueue_package_mark_seen(struct pkginfo *pkg)
+{
+ enqueue_package(pkg);
+ pkg->clientdata->cmdline_seen++;
+}
+
+static void
+enqueue_pending(void)
+{
+ struct pkg_hash_iter *iter;
+ struct pkginfo *pkg;
+
+ iter = pkg_hash_iter_new();
+ while ((pkg = pkg_hash_iter_next_pkg(iter)) != 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 &&
+ pkg->want != PKG_WANT_HOLD)
+ continue;
+ break;
+ case act_triggers:
+ if (!pkg->trigpend_head)
+ continue;
+ if (pkg->want != PKG_WANT_INSTALL &&
+ pkg->want != PKG_WANT_HOLD)
+ 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_hash_iter_free(iter);
+}
+
+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_mark_seen(pkg);
+ }
+
+ if (cipaction->arg_int == act_configure)
+ trigproc_populate_deferred();
+}
+
+int
+packages(const char *const *argv)
+{
+ trigproc_install_hooks();
+
+ modstatdb_open(f_noact ? msdbrw_readonly :
+ in_force(FORCE_NON_ROOT) ? 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);
+
+ /* We have processed this package more than once. There are no duplicates
+ * as we make sure of that when enqueuing them. */
+ if (rundown->pkg->clientdata->cmdline_seen > 1) {
+ 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->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 * 3 + 2) {
+ /* Make sure that even if we have exceeded the queue since not having
+ * made any progress, we are not getting stuck trying to progress by
+ * trigger processing, w/o jumping into the next dependtry. */
+ dependtry++;
+ sincenothing = 0;
+ if (dependtry >= DEPEND_TRY_LAST)
+ internerr("exceeded dependtry %d (sincenothing=%d; queue.length=%d)",
+ dependtry, sincenothing, queue.length);
+ } else if (sincenothing > queue.length * 2 + 2) {
+ if (dependtry >= DEPEND_TRY_TRIGGERS &&
+ progress_bytrigproc && progress_bytrigproc->trigpend_head) {
+ enqueue_package(pkg);
+ pkg = progress_bytrigproc;
+ progress_bytrigproc = NULL;
+ action_todo = act_configure;
+ } else {
+ dependtry++;
+ sincenothing = 0;
+ if (dependtry >= DEPEND_TRY_LAST)
+ internerr("exceeded dependtry %d (sincenothing=%d, queue.length=%d)",
+ dependtry, sincenothing, queue.length);
+ }
+ }
+
+ 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 %s status %d is out-of-bounds",
+ pkg_name(pkg, pnaw_always), 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, TRIGPROC_TRY_QUEUED);
+ 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);
+ }
+
+ if (queue.length)
+ internerr("finished package processing with non-empty queue length %d",
+ 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,
+};
+
+static enum found_status
+found_forced_on(enum dependtry dependtry_forced)
+{
+ if (dependtry >= dependtry_forced)
+ return FOUND_FORCED;
+ else
+ return FOUND_DEFER;
+}
+
+/*
+ * 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 (in_force(FORCE_DEPENDS_VERSION))
+ thisf = found_forced_on(DEPEND_TRY_FORCE_DEPENDS_VERSION);
+ 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 (in_force(FORCE_DEPENDS_VERSION))
+ thisf = found_forced_on(DEPEND_TRY_FORCE_DEPENDS_VERSION);
+ 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) {
+ if (possdependee->trigaw.head == NULL)
+ internerr("package %s in state %s, has no awaited triggers",
+ pkg_name(possdependee, pnaw_always),
+ pkg_status_name(possdependee));
+
+ if (removing ||
+ !(f_triggers ||
+ (possdependee->clientdata &&
+ 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;
+ }
+ /* 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 && in_force(FORCE_CONFIGURE_ANY) &&
+ !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 (in_force(FORCE_DEPENDS_VERSION))
+ 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;
+
+ 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;
+ interestingwarnings = 0;
+ 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 (in_force(FORCE_DEPENDS)) {
+ thisf = found_forced_on(DEPEND_TRY_FORCE_DEPENDS);
+ 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;
+}