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pacman/lib/libalpm/sync.c
Chantry Xavier 594f1fbbb1 alpm_list : change the alpm_list_find* to return the matching item. 
alpm_list_find and alpm_list_find_ptr will now return a void *, and
alpm_list_find_str will return a char *, instead of an int.

Signed-off-by: Chantry Xavier <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>
2007-12-02 18:12:41 -06:00

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/*
* sync.c
*
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
* Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.org>
*
* This program 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 program 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <dirent.h>
/* libalpm */
#include "sync.h"
#include "alpm_list.h"
#include "log.h"
#include "error.h"
#include "package.h"
#include "db.h"
#include "cache.h"
#include "deps.h"
#include "conflict.h"
#include "trans.h"
#include "util.h"
#include "handle.h"
#include "alpm.h"
#include "server.h"
#include "delta.h"
pmsyncpkg_t *_alpm_sync_new(int type, pmpkg_t *spkg, void *data)
{
pmsyncpkg_t *sync;
ALPM_LOG_FUNC;
CALLOC(sync, 1, sizeof(pmsyncpkg_t), RET_ERR(PM_ERR_MEMORY, NULL));
sync->type = type;
sync->pkg = spkg;
sync->data = data;
return(sync);
}
void _alpm_sync_free(pmsyncpkg_t *sync)
{
ALPM_LOG_FUNC;
if(sync == NULL) {
return;
}
/* TODO wow this is ugly */
if(sync->type == PM_SYNC_TYPE_REPLACE) {
alpm_list_free_inner(sync->data, (alpm_list_fn_free)_alpm_pkg_free);
alpm_list_free(sync->data);
sync->data = NULL;
} else {
_alpm_pkg_free(sync->data);
sync->data = NULL;
}
FREE(sync);
}
static void synclist_free(alpm_list_t *syncpkgs)
{
if(syncpkgs) {
alpm_list_t *tmp;
for(tmp = syncpkgs; tmp; tmp = alpm_list_next(tmp)) {
if(tmp->data) {
_alpm_sync_free(tmp->data);
}
}
alpm_list_free(syncpkgs);
}
}
/* Find recommended replacements for packages during a sync.
*/
static int find_replacements(pmtrans_t *trans, pmdb_t *db_local,
alpm_list_t *dbs_sync, alpm_list_t **syncpkgs)
{
alpm_list_t *i, *j, *k; /* wow */
ALPM_LOG_FUNC;
if(syncpkgs == NULL) {
return(-1);
}
/* check for "recommended" package replacements */
_alpm_log(PM_LOG_DEBUG, "checking for package replacements\n");
for(i = dbs_sync; i; i = i->next) {
pmdb_t *db = i->data;
/* for each db, check each package's REPLACES list */
for(j = _alpm_db_get_pkgcache(db); j; j = j->next) {
pmpkg_t *spkg = j->data;
for(k = alpm_pkg_get_replaces(spkg); k; k = k->next) {
const char *replacement = k->data;
pmpkg_t *lpkg = _alpm_db_get_pkgfromcache(db_local, replacement);
if(!lpkg) {
continue;
}
_alpm_log(PM_LOG_DEBUG, "checking replacement '%s' for package '%s'\n",
replacement, spkg->name);
/* ignore if EITHER the local or replacement package are to be ignored */
if(_alpm_pkg_should_ignore(spkg) || _alpm_pkg_should_ignore(lpkg)) {
_alpm_log(PM_LOG_WARNING, _("%s-%s: ignoring package upgrade (to be replaced by %s-%s)\n"),
alpm_pkg_get_name(lpkg), alpm_pkg_get_version(lpkg),
alpm_pkg_get_name(spkg), alpm_pkg_get_version(spkg));
} else {
/* get confirmation for the replacement */
if(trans) {
int doreplace = 0;
QUESTION(trans, PM_TRANS_CONV_REPLACE_PKG, lpkg, spkg, db->treename, &doreplace);
if(!doreplace) {
continue;
}
}
/* if confirmed, add this to the 'final' list, designating 'lpkg' as
* the package to replace.
*/
pmsyncpkg_t *sync;
pmpkg_t *dummy = _alpm_pkg_new(alpm_pkg_get_name(lpkg), NULL);
if(dummy == NULL) {
pm_errno = PM_ERR_MEMORY;
synclist_free(*syncpkgs);
return(-1);
}
/* check if spkg->name is already in the packages list. */
sync = _alpm_sync_find(*syncpkgs, alpm_pkg_get_name(spkg));
if(sync) {
/* found it -- just append to the replaces list */
sync->data = alpm_list_add(sync->data, dummy);
} else {
/* none found -- enter pkg into the final sync list */
sync = _alpm_sync_new(PM_SYNC_TYPE_REPLACE, spkg, NULL);
if(sync == NULL) {
_alpm_pkg_free(dummy);
pm_errno = PM_ERR_MEMORY;
synclist_free(*syncpkgs);
return(-1);
}
sync->data = alpm_list_add(NULL, dummy);
*syncpkgs = alpm_list_add(*syncpkgs, sync);
}
_alpm_log(PM_LOG_DEBUG, "%s-%s elected for upgrade (to be replaced by %s-%s)\n",
alpm_pkg_get_name(lpkg), alpm_pkg_get_version(lpkg),
alpm_pkg_get_name(spkg), alpm_pkg_get_version(spkg));
}
}
}
}
return(0);
}
/** Get a list of upgradable packages on the current system
* Adds out of date packages to *list.
* @arg list pointer to a list of pmsyncpkg_t.
*/
int SYMEXPORT alpm_sync_sysupgrade(pmdb_t *db_local,
alpm_list_t *dbs_sync, alpm_list_t **syncpkgs)
{
return(_alpm_sync_sysupgrade(NULL, db_local, dbs_sync, syncpkgs));
}
int _alpm_sync_sysupgrade(pmtrans_t *trans,
pmdb_t *db_local, alpm_list_t *dbs_sync, alpm_list_t **syncpkgs)
{
alpm_list_t *i, *j;
ALPM_LOG_FUNC;
if(syncpkgs == NULL) {
return(-1);
}
/* check for "recommended" package replacements */
if(find_replacements(trans, db_local, dbs_sync, syncpkgs)) {
return(-1);
}
/* match installed packages with the sync dbs and compare versions */
_alpm_log(PM_LOG_DEBUG, "checking for package upgrades\n");
for(i = _alpm_db_get_pkgcache(db_local); i; i = i->next) {
int replace = 0;
pmpkg_t *local = i->data;
pmpkg_t *spkg = NULL;
pmsyncpkg_t *sync;
for(j = dbs_sync; !spkg && j; j = j->next) {
spkg = _alpm_db_get_pkgfromcache(j->data, alpm_pkg_get_name(local));
}
if(spkg == NULL) {
_alpm_log(PM_LOG_DEBUG, "'%s' not found in sync db -- skipping\n",
alpm_pkg_get_name(local));
continue;
}
/* we don't care about a to-be-replaced package's newer version */
for(j = *syncpkgs; j && !replace; j=j->next) {
sync = j->data;
if(sync->type == PM_SYNC_TYPE_REPLACE) {
if(_alpm_pkg_find(alpm_pkg_get_name(spkg), sync->data)) {
replace = 1;
}
}
}
if(replace) {
_alpm_log(PM_LOG_DEBUG, "'%s' is already elected for removal -- skipping\n",
alpm_pkg_get_name(local));
continue;
}
/* compare versions and see if we need to upgrade */
if(alpm_pkg_compare_versions(local, spkg)) {
_alpm_log(PM_LOG_DEBUG, "%s elected for upgrade (%s => %s)\n",
alpm_pkg_get_name(local), alpm_pkg_get_version(local),
alpm_pkg_get_version(spkg));
if(!_alpm_sync_find(*syncpkgs, alpm_pkg_get_name(spkg))) {
/* If package is in the ignorepkg list, skip it */
if(_alpm_pkg_should_ignore(spkg)) {
_alpm_log(PM_LOG_WARNING, _("%s: ignoring package upgrade (%s => %s)\n"),
alpm_pkg_get_name(local), alpm_pkg_get_version(local),
alpm_pkg_get_version(spkg));
continue;
}
pmpkg_t *tmp = _alpm_pkg_dup(local);
if(tmp == NULL) {
pm_errno = PM_ERR_MEMORY;
synclist_free(*syncpkgs);
return(-1);
}
sync = _alpm_sync_new(PM_SYNC_TYPE_UPGRADE, spkg, tmp);
if(sync == NULL) {
_alpm_pkg_free(tmp);
pm_errno = PM_ERR_MEMORY;
synclist_free(*syncpkgs);
return(-1);
}
*syncpkgs = alpm_list_add(*syncpkgs, sync);
}
}
}
return(0);
}
int _alpm_sync_addtarget(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t *dbs_sync, char *name)
{
char targline[PKG_FULLNAME_LEN];
char *targ;
alpm_list_t *j;
pmpkg_t *local;
pmpkg_t *spkg = NULL;
pmsyncpkg_t *sync;
int repo_found = 0;
ALPM_LOG_FUNC;
ASSERT(db_local != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(name != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
strncpy(targline, name, PKG_FULLNAME_LEN);
targ = strchr(targline, '/');
if(targ) {
/* we are looking for a package in a specific database */
*targ = '\0';
targ++;
_alpm_log(PM_LOG_DEBUG, "searching for target '%s' in repo\n", targ);
for(j = dbs_sync; j && !spkg; j = j->next) {
pmdb_t *db = j->data;
if(strcmp(db->treename, targline) == 0) {
repo_found = 1;
spkg = _alpm_db_get_pkgfromcache(db, targ);
if(spkg == NULL) {
/* Search provides */
_alpm_log(PM_LOG_DEBUG, "target '%s' not found in db '%s' -- looking for provisions\n", targ, db->treename);
alpm_list_t *p = _alpm_db_whatprovides(db, targ);
if(!p) {
RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
}
spkg = (pmpkg_t *) p->data;
_alpm_log(PM_LOG_DEBUG, "found '%s' as a provision for '%s'\n",
alpm_pkg_get_name(spkg), targ);
alpm_list_free(p);
}
}
}
if(!repo_found) {
_alpm_log(PM_LOG_ERROR, _("repository '%s' not found\n"), targline);
RET_ERR(PM_ERR_PKG_REPO_NOT_FOUND, -1);
}
} else {
targ = targline;
for(j = dbs_sync; j && !spkg; j = j->next) {
pmdb_t *db = j->data;
spkg = _alpm_db_get_pkgfromcache(db, targ);
}
if(spkg == NULL) {
/* Search provides */
_alpm_log(PM_LOG_DEBUG, "target '%s' not found -- looking for provisions\n", targ);
for(j = dbs_sync; j && !spkg; j = j->next) {
pmdb_t *db = j->data;
alpm_list_t *p = _alpm_db_whatprovides(db, targ);
if(p) {
spkg = (pmpkg_t *) p->data;
_alpm_log(PM_LOG_DEBUG, "found '%s' as a provision for '%s' in db '%s'\n",
alpm_pkg_get_name(spkg), targ, db->treename);
alpm_list_free(p);
}
}
}
}
if(spkg == NULL) {
RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
}
local = _alpm_db_get_pkgfromcache(db_local, alpm_pkg_get_name(spkg));
if(local) {
if(alpm_pkg_compare_versions(local, spkg) == 0) {
/* spkg is NOT an upgrade */
if(trans->flags & PM_TRANS_FLAG_NEEDED) {
_alpm_log(PM_LOG_WARNING, _("%s-%s is up to date -- skipping\n"),
alpm_pkg_get_name(local), alpm_pkg_get_version(local));
return(0);
} else {
_alpm_log(PM_LOG_WARNING, _("%s-%s is up to date -- reinstalling\n"),
alpm_pkg_get_name(local), alpm_pkg_get_version(local));
}
}
}
/* add the package to the transaction */
if(!_alpm_sync_find(trans->packages, alpm_pkg_get_name(spkg))) {
pmpkg_t *dummy = NULL;
if(local) {
dummy = _alpm_pkg_new(alpm_pkg_get_name(local),
alpm_pkg_get_version(local));
if(dummy == NULL) {
RET_ERR(PM_ERR_MEMORY, -1);
}
}
sync = _alpm_sync_new(PM_SYNC_TYPE_UPGRADE, spkg, dummy);
if(sync == NULL) {
_alpm_pkg_free(dummy);
RET_ERR(PM_ERR_MEMORY, -1);
}
_alpm_log(PM_LOG_DEBUG, "adding target '%s' to the transaction set\n",
alpm_pkg_get_name(spkg));
trans->packages = alpm_list_add(trans->packages, sync);
}
return(0);
}
/* Helper functions for alpm_list_remove
*/
static int syncpkg_cmp(const void *s1, const void *s2)
{
const pmsyncpkg_t *sp1 = s1;
const pmsyncpkg_t *sp2 = s2;
pmpkg_t *p1, *p2;
p1 = alpm_sync_get_pkg(sp1);
p2 = alpm_sync_get_pkg(sp2);
return(strcmp(alpm_pkg_get_name(p1), alpm_pkg_get_name(p2)));
}
int _alpm_sync_prepare(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t *dbs_sync, alpm_list_t **data)
{
alpm_list_t *deps = NULL;
alpm_list_t *list = NULL, *remove = NULL; /* allow checkdeps usage with trans->packages */
alpm_list_t *i, *j;
int ret = 0;
ALPM_LOG_FUNC;
ASSERT(db_local != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
if(data) {
*data = NULL;
}
if(!(trans->flags & PM_TRANS_FLAG_DEPENDSONLY)) {
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
list = alpm_list_add(list, sync->pkg);
}
}
if(!(trans->flags & PM_TRANS_FLAG_NODEPS)) {
/* Resolve targets dependencies */
EVENT(trans, PM_TRANS_EVT_RESOLVEDEPS_START, NULL, NULL);
_alpm_log(PM_LOG_DEBUG, "resolving target's dependencies\n");
/* build remove list for resolvedeps */
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
if(sync->type == PM_SYNC_TYPE_REPLACE) {
for(j = sync->data; j; j = j->next) {
remove = alpm_list_add(remove, j->data);
}
}
}
for(i = trans->packages; i; i = i->next) {
pmpkg_t *spkg = ((pmsyncpkg_t *)i->data)->pkg;
if(_alpm_resolvedeps(db_local, dbs_sync, spkg, &list,
remove, trans, data) == -1) {
/* pm_errno is set by resolvedeps */
ret = -1;
goto cleanup;
}
}
if((trans->flags & PM_TRANS_FLAG_DEPENDSONLY)) {
FREELIST(trans->packages);
}
for(i = list; i; i = i->next) {
/* add the dependencies found by resolvedeps to the transaction set */
pmpkg_t *spkg = i->data;
if(!_alpm_sync_find(trans->packages, alpm_pkg_get_name(spkg))) {
pmsyncpkg_t *sync = _alpm_sync_new(PM_SYNC_TYPE_DEPEND, spkg, NULL);
if(sync == NULL) {
ret = -1;
goto cleanup;
}
trans->packages = alpm_list_add(trans->packages, sync);
_alpm_log(PM_LOG_DEBUG, "adding package %s-%s to the transaction targets\n",
alpm_pkg_get_name(spkg), alpm_pkg_get_version(spkg));
}
}
/* re-order w.r.t. dependencies */
alpm_list_t *sortlist = _alpm_sortbydeps(list, PM_TRANS_TYPE_ADD);
alpm_list_t *newpkgs = NULL;
for(i = sortlist; i; i = i->next) {
for(j = trans->packages; j; j = j->next) {
pmsyncpkg_t *s = j->data;
if(s->pkg == i->data) {
newpkgs = alpm_list_add(newpkgs, s);
}
}
}
alpm_list_free(sortlist);
alpm_list_free(trans->packages);
trans->packages = newpkgs;
EVENT(trans, PM_TRANS_EVT_RESOLVEDEPS_DONE, NULL, NULL);
}
/* We don't care about conflicts if we're just printing uris */
if(!(trans->flags & (PM_TRANS_FLAG_NOCONFLICTS | PM_TRANS_FLAG_PRINTURIS))) {
/* check for inter-conflicts and whatnot */
EVENT(trans, PM_TRANS_EVT_INTERCONFLICTS_START, NULL, NULL);
_alpm_log(PM_LOG_DEBUG, "looking for conflicts\n");
deps = _alpm_checkconflicts(db_local, list);
if(deps) {
int errorout = 0;
alpm_list_t *asked = NULL;
pmconflict_t *conflict = NULL;
for(i = deps; i && !errorout; i = i->next) {
pmsyncpkg_t *sync;
pmpkg_t *found = NULL;
conflict = i->data;
_alpm_log(PM_LOG_DEBUG, "package '%s' conflicts with '%s'\n",
conflict->package1, conflict->package2);
/* check if the conflicting package is about to be removed/replaced.
* if so, then just ignore it. */
for(j = trans->packages; j && !found; j = j->next) {
sync = j->data;
if(sync->type == PM_SYNC_TYPE_REPLACE) {
found = _alpm_pkg_find(conflict->package2, sync->data);
}
}
if(found) {
_alpm_log(PM_LOG_DEBUG, "'%s' is already elected for removal -- skipping\n",
alpm_pkg_get_name(found));
continue;
}
sync = _alpm_sync_find(trans->packages, conflict->package1);
if(sync == NULL) {
_alpm_log(PM_LOG_DEBUG, "'%s' not found in transaction set -- skipping\n",
conflict->package1);
continue;
}
pmpkg_t *local = _alpm_db_get_pkgfromcache(db_local, conflict->package2);
/* check if this package provides the package it's conflicting with */
if(alpm_list_find(alpm_pkg_get_provides(sync->pkg),
conflict->package2, _alpm_prov_cmp)) {
/* treat like a replaces item so requiredby fields are
* inherited properly. */
_alpm_log(PM_LOG_DEBUG, "package '%s' provides its own conflict\n",
conflict->package1);
if(!local) {
char *rmpkg = NULL;
void *target, *depend;
/* hmmm, package2 isn't installed, so it must be conflicting
* with another package in our final list. For example:
*
* pacman -S blackbox xfree86
*
* If no x-servers are installed and blackbox pulls in xorg, then
* xorg and xfree86 will conflict with each other. In this case,
* we should follow the user's preference and rip xorg out of final,
* opting for xfree86 instead.
*/
/* figure out which one was requested in targets. If they both
* were, then it's still an unresolvable conflict. */
target = alpm_list_find_str(trans->targets, conflict->package1);
depend = alpm_list_find_str(trans->targets, conflict->package2);
if(depend && !target) {
_alpm_log(PM_LOG_DEBUG, "'%s' is in the target list -- keeping it\n",
conflict->package2);
/* remove conflict->package1 */
rmpkg = conflict->package1;
} else if(target && !depend) {
_alpm_log(PM_LOG_DEBUG, "'%s' is in the target list -- keeping it\n",
conflict->package1);
/* remove conflict->package2 */
rmpkg = conflict->package2;
} else {
/* miss->target2 is not needed, miss->target already provides
* it, let's resolve the conflict */
rmpkg = conflict->package2;
}
if(rmpkg) {
pmsyncpkg_t *rsync = _alpm_sync_find(trans->packages, rmpkg);
void *vpkg;
_alpm_log(PM_LOG_DEBUG, "removing '%s' from target list\n",
rsync->pkg->name);
trans->packages = alpm_list_remove(trans->packages, rsync,
syncpkg_cmp, &vpkg);
_alpm_sync_free(vpkg);
continue;
}
}
}
/* It's a conflict -- see if they want to remove it */
_alpm_log(PM_LOG_DEBUG, "resolving package '%s' conflict\n",
conflict->package1);
if(local) {
int doremove = 0;
if(!alpm_list_find_str(asked, conflict->package2)) {
QUESTION(trans, PM_TRANS_CONV_CONFLICT_PKG, conflict->package1,
conflict->package2, NULL, &doremove);
asked = alpm_list_add(asked, strdup(conflict->package2));
if(doremove) {
pmpkg_t *q = _alpm_pkg_dup(local);
if(sync->type != PM_SYNC_TYPE_REPLACE) {
/* switch this sync type to REPLACE */
sync->type = PM_SYNC_TYPE_REPLACE;
_alpm_pkg_free(sync->data);
sync->data = NULL;
}
/* append to the replaces list */
_alpm_log(PM_LOG_DEBUG, "electing '%s' for removal\n",
conflict->package2);
sync->data = alpm_list_add(sync->data, q);
/* see if the package is in the current target list */
pmsyncpkg_t *rsync = _alpm_sync_find(trans->packages,
conflict->package2);
if(rsync) {
/* remove it from the target list */
void *vpkg;
_alpm_log(PM_LOG_DEBUG, "removing '%s' from target list\n",
conflict->package2);
trans->packages = alpm_list_remove(trans->packages, rsync,
syncpkg_cmp, &vpkg);
_alpm_sync_free(vpkg);
}
} else {
/* abort */
_alpm_log(PM_LOG_ERROR, _("unresolvable package conflicts detected\n"));
errorout = 1;
}
}
} else {
_alpm_log(PM_LOG_ERROR, _("unresolvable package conflicts detected\n"));
errorout = 1;
}
}
if(errorout) {
/* The last conflict was unresolvable, so we duplicate it and add it to *data */
pm_errno = PM_ERR_CONFLICTING_DEPS;
if(data) {
pmconflict_t *lastconflict = conflict;
if((conflict = malloc(sizeof(pmconflict_t))) == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %zd bytes\n"),
sizeof(pmconflict_t));
FREELIST(*data);
pm_errno = PM_ERR_MEMORY;
} else {
*conflict = *lastconflict;
*data = alpm_list_add(*data, conflict);
}
}
FREELIST(asked);
FREELIST(deps);
ret = -1;
goto cleanup;
}
FREELIST(asked);
FREELIST(deps);
}
EVENT(trans, PM_TRANS_EVT_INTERCONFLICTS_DONE, NULL, NULL);
}
if(!(trans->flags & PM_TRANS_FLAG_NODEPS)) {
/* rebuild remove and list */
alpm_list_free(list);
list = NULL;
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
list = alpm_list_add(list, sync->pkg);
}
alpm_list_free(remove);
remove = NULL;
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
if(sync->type == PM_SYNC_TYPE_REPLACE) {
for(j = sync->data; j; j = j->next) {
remove = alpm_list_add(remove, j->data);
}
}
}
_alpm_log(PM_LOG_DEBUG, "checking dependencies\n");
deps = alpm_checkdeps(db_local, 1, remove, list);
if(deps) {
pm_errno = PM_ERR_UNSATISFIED_DEPS;
ret = -1;
*data = deps;
goto cleanup;
}
}
cleanup:
alpm_list_free(list);
alpm_list_free(remove);
return(ret);
}
/** Returns a list of deltas that should be downloaded instead of the
* package.
*
* It first tests if a delta path exists between the currently installed
* version (if any) and the version to upgrade to. If so, the delta path
* is used if its size is below a set percentage (MAX_DELTA_RATIO) of
* the package size, Otherwise, an empty list is returned.
*
* @param newpkg the new package to upgrade to
* @param db_local the local database
*
* @return the list of pmdelta_t * objects. NULL (the empty list) is
* returned if the package should be downloaded instead of deltas.
*/
static alpm_list_t *pkg_upgrade_delta_path(pmpkg_t *newpkg, pmdb_t *db_local)
{
pmpkg_t *oldpkg = alpm_db_get_pkg(db_local, newpkg->name);
alpm_list_t *ret = NULL;
if(oldpkg) {
const char *oldname = alpm_pkg_get_filename(oldpkg);
char *oldpath = _alpm_filecache_find(oldname);
if(oldpath) {
alpm_list_t *deltas = _alpm_shortest_delta_path(
alpm_pkg_get_deltas(newpkg),
alpm_pkg_get_version(oldpkg),
alpm_pkg_get_version(newpkg));
if(deltas) {
unsigned long dltsize = _alpm_delta_path_size(deltas);
unsigned long pkgsize = alpm_pkg_get_size(newpkg);
if(dltsize < pkgsize * MAX_DELTA_RATIO) {
ret = deltas;
} else {
ret = NULL;
alpm_list_free(deltas);
}
}
FREE(oldpath);
}
}
return(ret);
}
/** Returns the size of the files that will be downloaded to install a
* package.
*
* @param newpkg the new package to upgrade to
* @param db_local the local database
*
* @return the size of the download
*/
unsigned long SYMEXPORT alpm_pkg_download_size(pmpkg_t *newpkg, pmdb_t *db_local)
{
char *fpath = _alpm_filecache_find(alpm_pkg_get_filename(newpkg));
unsigned long size = 0;
if(fpath) {
size = 0;
} else if(handle->usedelta) {
alpm_list_t *deltas = pkg_upgrade_delta_path(newpkg, db_local);
if(deltas) {
size = _alpm_delta_path_size_uncached(deltas);
} else {
size = alpm_pkg_get_size(newpkg);
}
alpm_list_free(deltas);
} else {
size = alpm_pkg_get_size(newpkg);
}
FREE(fpath);
return(size);
}
/** Applies delta files to create an upgraded package file.
*
* All intermediate files are deleted, leaving only the starting and
* ending package files.
*
* @param trans the transaction
* @param patches A list of alternating pmpkg_t * and pmdelta_t *
* objects. The patch command will be built using the pmpkg_t, pmdelta_t
* pair.
*
* @return 0 if all delta files were able to be applied, 1 otherwise.
*/
static int apply_deltas(pmtrans_t *trans, alpm_list_t *patches)
{
/* keep track of the previous package in the loop to decide if a
* package file should be deleted */
pmpkg_t *lastpkg = NULL;
int lastpkg_failed = 0;
int ret = 0;
const char *cachedir = _alpm_filecache_setup();
alpm_list_t *p = patches;
while(p) {
pmpkg_t *pkg;
pmdelta_t *d;
char command[PATH_MAX], fname[PATH_MAX];
char pkgfilename[PKG_FILENAME_LEN];
pkg = alpm_list_getdata(p);
p = alpm_list_next(p);
d = alpm_list_getdata(p);
p = alpm_list_next(p);
/* if patching fails, ignore the rest of that package's deltas */
if(lastpkg_failed) {
if(pkg == lastpkg) {
continue;
} else {
lastpkg_failed = 0;
}
}
/* an example of the patch command: (using /cache for cachedir)
* xdelta patch /cache/pacman_3.0.0-1_to_3.0.1-1-i686.delta \
* /cache/pacman-3.0.0-1-i686.pkg.tar.gz \
* /cache/pacman-3.0.1-1-i686.pkg.tar.gz
*/
/* build the patch command */
snprintf(command, PATH_MAX,
"xdelta patch" /* the command */
" %s/%s" /* the delta */
" %s/%s-%s-%s" PKGEXT /* the 'from' package */
" %s/%s-%s-%s" PKGEXT, /* the 'to' package */
cachedir, d->filename,
cachedir, pkg->name, d->from, pkg->arch,
cachedir, pkg->name, d->to, pkg->arch);
_alpm_log(PM_LOG_DEBUG, _("command: %s\n"), command);
snprintf(pkgfilename, PKG_FILENAME_LEN, "%s-%s-%s" PKGEXT,
pkg->name, d->to, pkg->arch);
EVENT(trans, PM_TRANS_EVT_DELTA_PATCH_START, pkgfilename, d->filename);
if(system(command) == 0) {
EVENT(trans, PM_TRANS_EVT_DELTA_PATCH_DONE, NULL, NULL);
/* delete the delta file */
snprintf(fname, PATH_MAX, "%s/%s", cachedir, d->filename);
unlink(fname);
/* Delete the 'from' package but only if it is an intermediate
* package. The starting 'from' package should be kept, just
* as if deltas were not used. Delete the package file if the
* previous iteration of the loop used the same package. */
if(pkg == lastpkg) {
snprintf(fname, PATH_MAX, "%s/%s-%s-%s" PKGEXT,
cachedir, pkg->name, d->from, pkg->arch);
unlink(fname);
} else {
lastpkg = pkg;
}
} else {
EVENT(trans, PM_TRANS_EVT_DELTA_PATCH_FAILED, NULL, NULL);
lastpkg_failed = 1;
ret = 1;
}
}
return(ret);
}
/** Compares the md5sum of a file to the expected value.
*
* If the md5sum does not match, the user is asked whether the file
* should be deleted.
*
* @param trans the transaction
* @param filename the filename of the file to test
* @param md5sum the expected md5sum of the file
* @param data data to write the error messages to
*
* @return 0 if the md5sum matched, 1 otherwise
*/
static int test_md5sum(pmtrans_t *trans, const char *filename,
const char *md5sum, alpm_list_t **data)
{
char *filepath;
char *md5sum2;
char *errormsg = NULL;
int ret = 0;
filepath = _alpm_filecache_find(filename);
md5sum2 = alpm_get_md5sum(filepath);
if(md5sum == NULL) {
/* TODO wtf is this? malloc'd strings for error messages? */
if((errormsg = calloc(512, sizeof(char))) == NULL) {
RET_ERR(PM_ERR_MEMORY, -1);
}
snprintf(errormsg, 512, _("can't get md5 checksum for file %s\n"),
filename);
*data = alpm_list_add(*data, errormsg);
ret = 1;
} else if(md5sum2 == NULL) {
if((errormsg = calloc(512, sizeof(char))) == NULL) {
RET_ERR(PM_ERR_MEMORY, -1);
}
snprintf(errormsg, 512, _("can't get md5 checksum for file %s\n"),
filename);
*data = alpm_list_add(*data, errormsg);
ret = 1;
} else if(strcmp(md5sum, md5sum2) != 0) {
int doremove = 0;
if((errormsg = calloc(512, sizeof(char))) == NULL) {
RET_ERR(PM_ERR_MEMORY, -1);
}
QUESTION(trans, PM_TRANS_CONV_CORRUPTED_PKG, (char *)filename,
NULL, NULL, &doremove);
if(doremove) {
unlink(filepath);
}
snprintf(errormsg, 512, _("file %s was corrupted (bad MD5 checksum)\n"),
filename);
*data = alpm_list_add(*data, errormsg);
ret = 1;
}
FREE(filepath);
FREE(md5sum2);
return(ret);
}
/** Compares the md5sum of a delta to the expected value.
*
* @param trans the transaction
* @param delta the delta to test
* @param data data to write the error messages to
*
* @return 0 if the md5sum matched, 1 otherwise
*/
static int test_delta_md5sum(pmtrans_t *trans, pmdelta_t *delta,
alpm_list_t **data)
{
const char *filename;
const char *md5sum;
int ret = 0;
filename = alpm_delta_get_filename(delta);
md5sum = alpm_delta_get_md5sum(delta);
ret = test_md5sum(trans, filename, md5sum, data);
return(ret);
}
/** Compares the md5sum of a package to the expected value.
*
* @param trans the transaction
* @param pkg the package to test
* @param data data to write the error messages to
*
* @return 0 if the md5sum matched, 1 otherwise
*/
static int test_pkg_md5sum(pmtrans_t *trans, pmpkg_t *pkg, alpm_list_t **data)
{
const char *filename;
const char *md5sum;
int ret = 0;
filename = alpm_pkg_get_filename(pkg);
md5sum = alpm_pkg_get_md5sum(pkg);
ret = test_md5sum(trans, filename, md5sum, data);
return(ret);
}
int _alpm_sync_commit(pmtrans_t *trans, pmdb_t *db_local, alpm_list_t **data)
{
alpm_list_t *i, *j, *files = NULL;
alpm_list_t *patches = NULL, *deltas = NULL;
pmtrans_t *tr = NULL;
int replaces = 0, retval = 0;
const char *cachedir = NULL;
int dltotal = 0, dl = 0;
ALPM_LOG_FUNC;
ASSERT(db_local != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
cachedir = _alpm_filecache_setup();
trans->state = STATE_DOWNLOADING;
/* Sum up the download sizes. This has to be in its own loop because
* the download loop is grouped by db. */
for(j = trans->packages; j; j = j->next) {
pmsyncpkg_t *sync = j->data;
pmpkg_t *spkg = sync->pkg;
dltotal += alpm_pkg_download_size(spkg, db_local);
}
/* group sync records by repository and download */
for(i = handle->dbs_sync; i; i = i->next) {
pmdb_t *current = i->data;
for(j = trans->packages; j; j = j->next) {
pmsyncpkg_t *sync = j->data;
pmpkg_t *spkg = sync->pkg;
pmdb_t *dbs = spkg->origin_data.db;
if(current == dbs) {
const char *fname = NULL;
fname = alpm_pkg_get_filename(spkg);
if(trans->flags & PM_TRANS_FLAG_PRINTURIS) {
EVENT(trans, PM_TRANS_EVT_PRINTURI, (char *)alpm_db_get_url(current),
(char *)fname);
} else {
char *fpath = _alpm_filecache_find(fname);
if(!fpath) {
if(handle->usedelta) {
alpm_list_t *delta_path = pkg_upgrade_delta_path(spkg, db_local);
if(delta_path) {
alpm_list_t *dlts = NULL;
for(dlts = delta_path; dlts; dlts = alpm_list_next(dlts)) {
pmdelta_t *d = (pmdelta_t *)alpm_list_getdata(dlts);
char *fpath2 = _alpm_filecache_find(d->filename);
if(!fpath2) {
/* add the delta filename to the download list if
* it's not in the cache*/
files = alpm_list_add(files, strdup(d->filename));
}
/* save the package and delta so that the xdelta patch
* command can be run after the downloads finish */
patches = alpm_list_add(patches, spkg);
patches = alpm_list_add(patches, d);
/* keep a list of the delta files for md5sums */
deltas = alpm_list_add(deltas, d);
}
alpm_list_free(delta_path);
delta_path = NULL;
} else {
/* no deltas to download, so add the file to the
* download list */
files = alpm_list_add(files, strdup(fname));
}
} else {
/* not using deltas, so add the file to the download list */
files = alpm_list_add(files, strdup(fname));
}
}
FREE(fpath);
}
}
}
if(files) {
EVENT(trans, PM_TRANS_EVT_RETRIEVE_START, current->treename, NULL);
if(_alpm_downloadfiles(current->servers, cachedir, files, &dl, dltotal)) {
_alpm_log(PM_LOG_WARNING, _("failed to retrieve some files from %s\n"),
current->treename);
RET_ERR(PM_ERR_RETRIEVE, -1);
}
FREELIST(files);
}
}
if(trans->flags & PM_TRANS_FLAG_PRINTURIS) {
return(0);
}
if(handle->usedelta) {
int ret = 0;
/* only output if there are deltas to work with */
if(deltas) {
/* Check integrity of deltas */
EVENT(trans, PM_TRANS_EVT_DELTA_INTEGRITY_START, NULL, NULL);
for(i = deltas; i; i = i->next) {
pmdelta_t *d = alpm_list_getdata(i);
ret = test_delta_md5sum(trans, d, data);
if(ret == 1) {
retval = 1;
} else if(ret == -1) { /* -1 is for serious errors */
RET_ERR(pm_errno, -1);
}
}
if(retval) {
pm_errno = PM_ERR_DLT_CORRUPTED;
goto error;
}
EVENT(trans, PM_TRANS_EVT_DELTA_INTEGRITY_DONE, NULL, NULL);
/* Use the deltas to generate the packages */
EVENT(trans, PM_TRANS_EVT_DELTA_PATCHES_START, NULL, NULL);
ret = apply_deltas(trans, patches);
EVENT(trans, PM_TRANS_EVT_DELTA_PATCHES_DONE, NULL, NULL);
alpm_list_free(patches);
patches = NULL;
alpm_list_free(deltas);
deltas = NULL;
}
if(ret) {
pm_errno = PM_ERR_DLT_PATCHFAILED;
goto error;
}
}
/* Check integrity of packages */
EVENT(trans, PM_TRANS_EVT_INTEGRITY_START, NULL, NULL);
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
pmpkg_t *spkg = sync->pkg;
int ret = 0;
ret = test_pkg_md5sum(trans, spkg, data);
if(ret == 1) {
retval = 1;
} else if(ret == -1) { /* -1 is for serious errors */
RET_ERR(pm_errno, -1);
}
}
if(retval) {
pm_errno = PM_ERR_PKG_CORRUPTED;
goto error;
}
EVENT(trans, PM_TRANS_EVT_INTEGRITY_DONE, NULL, NULL);
if(trans->flags & PM_TRANS_FLAG_DOWNLOADONLY) {
return(0);
}
/* remove conflicting and to-be-replaced packages */
trans->state = STATE_COMMITING;
tr = _alpm_trans_new();
if(tr == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not create removal transaction\n"));
pm_errno = PM_ERR_MEMORY;
goto error;
}
if(_alpm_trans_init(tr, PM_TRANS_TYPE_REMOVE, PM_TRANS_FLAG_NODEPS, NULL, NULL, NULL) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not initialize the removal transaction\n"));
goto error;
}
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
if(sync->type == PM_SYNC_TYPE_REPLACE) {
alpm_list_t *j;
for(j = sync->data; j; j = j->next) {
pmpkg_t *pkg = j->data;
if(!_alpm_pkg_find(pkg->name, tr->packages)) {
if(_alpm_trans_addtarget(tr, pkg->name) == -1) {
goto error;
}
replaces++;
}
}
}
}
if(replaces) {
_alpm_log(PM_LOG_DEBUG, "removing conflicting and to-be-replaced packages\n");
if(_alpm_trans_prepare(tr, data) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not prepare removal transaction\n"));
goto error;
}
/* we want the frontend to be aware of commit details */
tr->cb_event = trans->cb_event;
if(_alpm_trans_commit(tr, NULL) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not commit removal transaction\n"));
goto error;
}
}
_alpm_trans_free(tr);
tr = NULL;
/* install targets */
_alpm_log(PM_LOG_DEBUG, "installing packages\n");
tr = _alpm_trans_new();
if(tr == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not create transaction\n"));
pm_errno = PM_ERR_MEMORY;
goto error;
}
if(_alpm_trans_init(tr, PM_TRANS_TYPE_UPGRADE, trans->flags | PM_TRANS_FLAG_NODEPS, trans->cb_event, trans->cb_conv, trans->cb_progress) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not initialize transaction\n"));
goto error;
}
for(i = trans->packages; i; i = i->next) {
pmsyncpkg_t *sync = i->data;
pmpkg_t *spkg = sync->pkg;
const char *fname;
char *fpath;
fname = alpm_pkg_get_filename(spkg);
/* Loop through the cache dirs until we find a matching file */
fpath = _alpm_filecache_find(fname);
if(_alpm_trans_addtarget(tr, fpath) == -1) {
FREE(fpath);
goto error;
}
FREE(fpath);
/* using alpm_list_last() is ok because addtarget() adds the new target at the
* end of the tr->packages list */
spkg = alpm_list_last(tr->packages)->data;
if(sync->type == PM_SYNC_TYPE_DEPEND) {
spkg->reason = PM_PKG_REASON_DEPEND;
}
}
if(_alpm_trans_prepare(tr, data) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not prepare transaction\n"));
/* pm_errno is set by trans_prepare */
goto error;
}
if(_alpm_trans_commit(tr, NULL) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not commit transaction\n"));
goto error;
}
_alpm_trans_free(tr);
tr = NULL;
return(0);
error:
_alpm_trans_free(tr);
tr = NULL;
return(-1);
}
pmsyncpkg_t *_alpm_sync_find(alpm_list_t *syncpkgs, const char* pkgname)
{
alpm_list_t *i;
for(i = syncpkgs; i; i = i->next) {
pmsyncpkg_t *syncpkg = i->data;
if(!syncpkg) {
continue;
}
pmpkg_t *pkg = alpm_sync_get_pkg(syncpkg);
if(strcmp(alpm_pkg_get_name(pkg), pkgname) == 0) {
_alpm_log(PM_LOG_DEBUG, "found package '%s-%s' in sync\n",
alpm_pkg_get_name(pkg), alpm_pkg_get_version(pkg));
return(syncpkg);
}
}
_alpm_log(PM_LOG_DEBUG, "package '%s' not found in sync\n", pkgname);
return(NULL); /* not found */
}
pmsynctype_t SYMEXPORT alpm_sync_get_type(const pmsyncpkg_t *sync)
{
/* Sanity checks */
ASSERT(sync != NULL, return(-1));
return sync->type;
}
pmpkg_t SYMEXPORT *alpm_sync_get_pkg(const pmsyncpkg_t *sync)
{
/* Sanity checks */
ASSERT(sync != NULL, return(NULL));
return sync->pkg;
}
void SYMEXPORT *alpm_sync_get_data(const pmsyncpkg_t *sync)
{
/* Sanity checks */
ASSERT(sync != NULL, return(NULL));
return sync->data;
}
/* vim: set ts=2 sw=2 noet: */
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