mirror of
https://github.com/moparisthebest/pacman
synced 2024-10-31 15:45:03 -04:00
da648bc24c
* ALPM_LOG_FUNCTION macro and all the great work to add this macro everywhere
411 lines
13 KiB
C
411 lines
13 KiB
C
/*
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* conflict.c
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*
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
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* Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
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* Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
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* Copyright (c) 2006 by Christian Hamar <krics@linuxforum.hu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#if defined(__APPLE__) || defined(__OpenBSD__)
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#include <sys/syslimits.h>
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#endif
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include <libintl.h>
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/* pacman */
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#include "handle.h"
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#include "alpm_list.h"
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#include "trans.h"
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#include "util.h"
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#include "error.h"
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#include "log.h"
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#include "cache.h"
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#include "deps.h"
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#include "conflict.h"
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/* Returns a alpm_list_t* of pmdepmissing_t pointers.
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*
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* conflicts are always name only
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*/
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alpm_list_t *_alpm_checkconflicts(pmdb_t *db, alpm_list_t *packages)
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{
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pmpkg_t *info = NULL;
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alpm_list_t *i, *j, *k;
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alpm_list_t *baddeps = NULL;
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pmdepmissing_t *miss = NULL;
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ALPM_LOG_FUNC;
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if(db == NULL) {
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return(NULL);
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}
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for(i = packages; i; i = i->next) {
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pmpkg_t *tp = i->data;
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if(tp == NULL) {
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continue;
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}
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for(j = tp->conflicts; j; j = j->next) {
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if(!strcmp(tp->name, j->data)) {
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/* a package cannot conflict with itself -- that's just not nice */
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continue;
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}
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/* CHECK 1: check targets against database */
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_alpm_log(PM_LOG_DEBUG, _("checkconflicts: targ '%s' vs db"), tp->name);
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for(k = _alpm_db_get_pkgcache(db, INFRQ_DEPENDS); k; k = k->next) {
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pmpkg_t *dp = (pmpkg_t *)k->data;
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if(!strcmp(dp->name, tp->name)) {
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/* a package cannot conflict with itself -- that's just not nice */
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continue;
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}
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if(!strcmp(j->data, dp->name)) {
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/* conflict */
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_alpm_log(PM_LOG_DEBUG, _("targs vs db: found %s as a conflict for %s"),
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dp->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, dp->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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} else {
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/* see if dp provides something in tp's conflict list */
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alpm_list_t *m;
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for(m = dp->provides; m; m = m->next) {
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if(!strcmp(m->data, j->data)) {
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/* confict */
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_alpm_log(PM_LOG_DEBUG, _("targs vs db: found %s as a conflict for %s"),
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dp->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, dp->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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}
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}
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}
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}
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/* CHECK 2: check targets against targets */
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_alpm_log(PM_LOG_DEBUG, _("checkconflicts: targ '%s' vs targs"), tp->name);
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for(k = packages; k; k = k->next) {
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pmpkg_t *otp = (pmpkg_t *)k->data;
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if(!strcmp(otp->name, tp->name)) {
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/* a package cannot conflict with itself -- that's just not nice */
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continue;
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}
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if(!strcmp(otp->name, (char *)j->data)) {
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/* otp is listed in tp's conflict list */
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_alpm_log(PM_LOG_DEBUG, _("targs vs targs: found %s as a conflict for %s"),
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otp->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, otp->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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} else {
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/* see if otp provides something in tp's conflict list */
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alpm_list_t *m;
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for(m = otp->provides; m; m = m->next) {
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if(!strcmp(m->data, j->data)) {
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_alpm_log(PM_LOG_DEBUG, _("targs vs targs: found %s as a conflict for %s"),
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otp->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, otp->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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}
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}
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}
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}
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}
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/* CHECK 3: check database against targets */
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_alpm_log(PM_LOG_DEBUG, _("checkconflicts: db vs targ '%s'"), tp->name);
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for(k = _alpm_db_get_pkgcache(db, INFRQ_DEPENDS); k; k = k->next) {
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alpm_list_t *conflicts = NULL;
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int usenewconflicts = 0;
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info = k->data;
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if(!strcmp(info->name, tp->name)) {
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/* a package cannot conflict with itself -- that's just not nice */
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continue;
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}
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/* If this package (*info) is also in our packages alpm_list_t, use the
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* conflicts list from the new package, not the old one (*info)
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*/
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for(j = packages; j; j = j->next) {
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pmpkg_t *pkg = j->data;
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if(!strcmp(pkg->name, info->name)) {
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/* Use the new, to-be-installed package's conflicts */
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conflicts = pkg->conflicts;
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usenewconflicts = 1;
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}
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}
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if(!usenewconflicts) {
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/* Use the old package's conflicts, it's the only set we have */
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conflicts = info->conflicts;
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}
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for(j = conflicts; j; j = j->next) {
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if(!strcmp((char *)j->data, tp->name)) {
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_alpm_log(PM_LOG_DEBUG, _("db vs targs: found %s as a conflict for %s"),
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info->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, info->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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} else {
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/* see if the db package conflicts with something we provide */
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alpm_list_t *m;
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for(m = conflicts; m; m = m->next) {
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alpm_list_t *n;
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for(n = tp->provides; n; n = n->next) {
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if(!strcmp(m->data, n->data)) {
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_alpm_log(PM_LOG_DEBUG, _("db vs targs: found %s as a conflict for %s"),
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info->name, tp->name);
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miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, info->name, NULL);
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if(!_alpm_depmiss_isin(miss, baddeps)) {
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baddeps = alpm_list_add(baddeps, miss);
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} else {
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FREE(miss);
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}
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}
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}
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}
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}
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}
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}
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}
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return(baddeps);
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}
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/* Returns a alpm_list_t* of file conflicts.
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*
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* adds list of files to skip to alpm_list_t** skip_list.
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*/
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alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root, alpm_list_t **skip_list)
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{
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alpm_list_t *i, *j, *k;
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char *filestr = NULL;
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char path[PATH_MAX+1];
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struct stat buf, buf2;
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alpm_list_t *conflicts = NULL;
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alpm_list_t *targets = trans->packages;
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double percent;
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ALPM_LOG_FUNC;
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if(db == NULL || targets == NULL || root == NULL) {
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return(NULL);
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}
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/* CHECK 1: check every target against every target */
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for(i = targets; i; i = i->next) {
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pmpkg_t *p1 = (pmpkg_t*)i->data;
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percent = (double)(alpm_list_count(targets) - alpm_list_count(i) + 1) / alpm_list_count(targets);
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PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", (percent * 100), alpm_list_count(targets), (alpm_list_count(targets) - alpm_list_count(i) +1));
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for(j = i; j; j = j->next) {
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pmpkg_t *p2 = (pmpkg_t*)j->data;
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if(strcmp(p1->name, p2->name)) {
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for(k = p1->files; k; k = k->next) {
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filestr = k->data;
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if(filestr[strlen(filestr)-1] == '/') {
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/* has a trailing '/', so it's a directory -- skip it. */
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continue;
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}
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if(strcmp(filestr, ".INSTALL") == 0) {
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continue;
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}
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if(alpm_list_find_str(p2->files, filestr)) {
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pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
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if(conflict == NULL) {
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_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
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sizeof(pmconflict_t));
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continue;
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}
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conflict->type = PM_CONFLICT_TYPE_TARGET;
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STRNCPY(conflict->target, p1->name, PKG_NAME_LEN);
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STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
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STRNCPY(conflict->ctarget, p2->name, PKG_NAME_LEN);
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conflicts = alpm_list_add(conflicts, conflict);
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}
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}
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}
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}
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/* CHECK 2: check every target against the filesystem */
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pmpkg_t *p = (pmpkg_t*)i->data;
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pmpkg_t *dbpkg = NULL;
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for(j = p->files; j; j = j->next) {
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int isdir = 0;
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filestr = (char*)j->data;
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snprintf(path, PATH_MAX, "%s%s", root, filestr);
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/* is this target a file or directory? */
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if(path[strlen(path)-1] == '/') {
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isdir = 1;
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path[strlen(path)-1] = '\0';
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}
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if(!lstat(path, &buf)) {
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int ok = 0;
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/* re-fetch with stat() instead of lstat() */
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stat(path, &buf);
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if(S_ISDIR(buf.st_mode)) {
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/* if it's a directory, then we have no conflict */
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ok = 1;
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} else {
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if(dbpkg == NULL) {
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dbpkg = _alpm_db_get_pkgfromcache(db, p->name);
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}
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if(dbpkg && !(dbpkg->infolevel & INFRQ_FILES)) {
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_alpm_log(PM_LOG_DEBUG, _("loading FILES info for '%s'"), dbpkg->name);
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_alpm_db_read(db, INFRQ_FILES, dbpkg);
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}
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if(dbpkg && alpm_list_find_str(dbpkg->files, j->data)) {
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ok = 1;
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}
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/* Make sure that the supposedly-conflicting file is not actually just
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* a symlink that points to a path that used to exist in the package.
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*/
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/* Check if any part of the conflicting file's path is a symlink */
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if(dbpkg && !ok) {
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char str[PATH_MAX];
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for(k = dbpkg->files; k; k = k->next) {
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snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
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stat(str, &buf2);
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if(buf.st_ino == buf2.st_ino) {
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ok = 1;
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}
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}
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}
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/* Check if the conflicting file has been moved to another package/target */
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if(!ok) {
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/* Look at all the targets */
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for(k = targets; k && !ok; k = k->next) {
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pmpkg_t *p1 = (pmpkg_t *)k->data;
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/* As long as they're not the current package */
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if(strcmp(p1->name, p->name)) {
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pmpkg_t *dbpkg2 = NULL;
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dbpkg2 = _alpm_db_get_pkgfromcache(db, p1->name);
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if(dbpkg2 && !(dbpkg2->infolevel & INFRQ_FILES)) {
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_alpm_log(PM_LOG_DEBUG, _("loading FILES info for '%s'"), dbpkg2->name);
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_alpm_db_read(db, INFRQ_FILES, dbpkg2);
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}
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/* If it used to exist in there, but doesn't anymore */
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if(dbpkg2 && !alpm_list_find_str(p1->files, filestr)
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&& alpm_list_find_str(dbpkg2->files, filestr)) {
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ok = 1;
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/* Add to the "skip list" of files that we shouldn't remove during an upgrade.
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*
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* This is a workaround for the following scenario:
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*
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* - the old package A provides file X
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* - the new package A does not
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* - the new package B provides file X
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* - package A depends on B, so B is upgraded first
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*
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* Package B is upgraded, so file X is installed. Then package A
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* is upgraded, and it *removes* file X, since it no longer exists
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* in package A.
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*
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* Our workaround is to scan through all "old" packages and all "new"
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* ones, looking for files that jump to different packages.
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*/
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*skip_list = alpm_list_add(*skip_list, strdup(filestr));
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}
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}
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}
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}
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}
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if(!ok) {
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pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
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if(conflict == NULL) {
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_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
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sizeof(pmconflict_t));
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continue;
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}
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conflict->type = PM_CONFLICT_TYPE_FILE;
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STRNCPY(conflict->target, p->name, PKG_NAME_LEN);
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STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
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conflict->ctarget[0] = 0;
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conflicts = alpm_list_add(conflicts, conflict);
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}
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}
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}
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}
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return(conflicts);
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}
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const char SYMEXPORT *alpm_conflict_get_target(pmconflict_t *conflict)
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{
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ALPM_LOG_FUNC;
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/* Sanity checks */
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ASSERT(handle != NULL, return(NULL));
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ASSERT(conflict != NULL, return(NULL));
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return conflict->target;
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}
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pmconflicttype_t SYMEXPORT alpm_conflict_get_type(pmconflict_t *conflict)
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{
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ALPM_LOG_FUNC;
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/* Sanity checks */
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ASSERT(handle != NULL, return(-1));
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ASSERT(conflict != NULL, return(-1));
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return conflict->type;
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}
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const char SYMEXPORT *alpm_conflict_get_file(pmconflict_t *conflict)
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{
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ALPM_LOG_FUNC;
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/* Sanity checks */
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ASSERT(handle != NULL, return(NULL));
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ASSERT(conflict != NULL, return(NULL));
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return conflict->file;
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}
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const char SYMEXPORT *alpm_conflict_get_ctarget(pmconflict_t *conflict)
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{
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ALPM_LOG_FUNC;
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/* Sanity checks */
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ASSERT(handle != NULL, return(NULL));
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ASSERT(conflict != NULL, return(NULL));
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return conflict->ctarget;
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}
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/* vim: set ts=2 sw=2 noet: */
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