mirror of
https://github.com/moparisthebest/pacman
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1fcc496756
This avoids needless breakage of the public API. Signed-off-by: Dave Reisner <d@falconindy.com> Signed-off-by: Dan McGee <dan@archlinux.org>
623 lines
17 KiB
C
623 lines
17 KiB
C
/*
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* conflict.c
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*
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* Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
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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, see <http://www.gnu.org/licenses/>.
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*/
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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 <string.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include <dirent.h>
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/* libalpm */
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#include "conflict.h"
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#include "alpm_list.h"
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#include "handle.h"
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#include "trans.h"
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#include "util.h"
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#include "log.h"
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#include "deps.h"
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pmconflict_t *_alpm_conflict_new(const char *package1, const char *package2,
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const char *reason)
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{
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pmconflict_t *conflict;
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ALPM_LOG_FUNC;
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MALLOC(conflict, sizeof(pmconflict_t), RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(conflict->package1, package1, RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(conflict->package2, package2, RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(conflict->reason, reason, RET_ERR(PM_ERR_MEMORY, NULL));
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return(conflict);
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}
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void _alpm_conflict_free(pmconflict_t *conflict)
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{
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FREE(conflict->package2);
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FREE(conflict->package1);
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FREE(conflict->reason);
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FREE(conflict);
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}
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pmconflict_t *_alpm_conflict_dup(const pmconflict_t *conflict)
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{
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pmconflict_t *newconflict;
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CALLOC(newconflict, 1, sizeof(pmconflict_t), RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(newconflict->package1, conflict->package1, RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(newconflict->package2, conflict->package2, RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(newconflict->reason, conflict->reason, RET_ERR(PM_ERR_MEMORY, NULL));
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return(newconflict);
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}
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static int conflict_isin(pmconflict_t *needle, alpm_list_t *haystack)
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{
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alpm_list_t *i;
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const char *npkg1 = needle->package1;
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const char *npkg2 = needle->package2;
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ALPM_LOG_FUNC;
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for(i = haystack; i; i = i->next) {
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pmconflict_t *conflict = i->data;
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const char *cpkg1 = conflict->package1;
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const char *cpkg2 = conflict->package2;
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if((strcmp(cpkg1, npkg1) == 0 && strcmp(cpkg2, npkg2) == 0)
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|| (strcmp(cpkg1, npkg2) == 0 && strcmp(cpkg2, npkg1) == 0)) {
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return(1);
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}
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}
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return(0);
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}
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/** Adds the pkg1/pkg2 conflict to the baddeps list
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* @param *baddeps list to add conflict to
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* @param pkg1 first package
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* @param pkg2 package causing conflict
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*/
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static void add_conflict(alpm_list_t **baddeps, const char *pkg1,
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const char *pkg2, const char *reason)
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{
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pmconflict_t *conflict = _alpm_conflict_new(pkg1, pkg2, reason);
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_alpm_log(PM_LOG_DEBUG, "package %s conflicts with %s (by %s)\n",
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pkg1, pkg2, reason);
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if(conflict && !conflict_isin(conflict, *baddeps)) {
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*baddeps = alpm_list_add(*baddeps, conflict);
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} else {
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_alpm_conflict_free(conflict);
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}
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}
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/** Check if packages from list1 conflict with packages from list2.
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* This looks at the conflicts fields of all packages from list1, and sees
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* if they match packages from list2.
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* If a conflict (pkg1, pkg2) is found, it is added to the baddeps list
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* in this order if order >= 0, or reverse order (pkg2,pkg1) otherwise.
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*
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* @param list1 first list of packages
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* @param list2 second list of packages
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* @param *baddeps list to store conflicts
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* @param order if >= 0 the conflict order is preserved, if < 0 it's reversed
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*/
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static void check_conflict(alpm_list_t *list1, alpm_list_t *list2,
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alpm_list_t **baddeps, int order) {
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alpm_list_t *i, *j, *k;
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if(!baddeps) {
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return;
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}
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for(i = list1; i; i = i->next) {
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pmpkg_t *pkg1 = i->data;
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const char *pkg1name = alpm_pkg_get_name(pkg1);
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for(j = alpm_pkg_get_conflicts(pkg1); j; j = j->next) {
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const char *conflict = j->data;
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pmdepend_t *parsed_conflict = _alpm_splitdep(conflict);
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for(k = list2; k; k = k->next) {
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pmpkg_t *pkg2 = k->data;
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const char *pkg2name = alpm_pkg_get_name(pkg2);
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if(strcmp(pkg1name, pkg2name) == 0) {
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/* skip the package we're currently processing */
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continue;
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}
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if(_alpm_depcmp(pkg2, parsed_conflict)) {
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if(order >= 0) {
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add_conflict(baddeps, pkg1name, pkg2name, conflict);
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} else {
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add_conflict(baddeps, pkg2name, pkg1name, conflict);
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}
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}
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}
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_alpm_dep_free(parsed_conflict);
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}
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}
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}
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/* Check for inter-conflicts */
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alpm_list_t *_alpm_innerconflicts(alpm_list_t *packages)
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{
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alpm_list_t *baddeps = NULL;
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ALPM_LOG_FUNC;
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_alpm_log(PM_LOG_DEBUG, "check targets vs targets\n");
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check_conflict(packages, packages, &baddeps, 0);
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return(baddeps);
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}
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/* Check for target vs (db - target) conflicts
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* In case of conflict the package1 field of pmdepconflict_t contains
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* the target package, package2 field contains the local package
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*/
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alpm_list_t *_alpm_outerconflicts(pmdb_t *db, alpm_list_t *packages)
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{
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alpm_list_t *baddeps = 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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alpm_list_t *dblist = alpm_list_diff(_alpm_db_get_pkgcache(db),
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packages, _alpm_pkg_cmp);
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/* two checks to be done here for conflicts */
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_alpm_log(PM_LOG_DEBUG, "check targets vs db\n");
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check_conflict(packages, dblist, &baddeps, 1);
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_alpm_log(PM_LOG_DEBUG, "check db vs targets\n");
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check_conflict(dblist, packages, &baddeps, -1);
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alpm_list_free(dblist);
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return(baddeps);
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}
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/** Check the package conflicts in a database
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*
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* @param pkglist the list of packages to check
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* @return an alpm_list_t of pmconflict_t
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*/
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alpm_list_t SYMEXPORT *alpm_checkconflicts(alpm_list_t *pkglist) {
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return(_alpm_innerconflicts(pkglist));
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}
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/* Returns a alpm_list_t* of file conflicts.
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* Hooray for set-intersects!
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* Pre-condition: both lists are sorted!
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*/
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static alpm_list_t *chk_fileconflicts(alpm_list_t *filesA, alpm_list_t *filesB)
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{
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alpm_list_t *ret = NULL;
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alpm_list_t *pA = filesA, *pB = filesB;
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while(pA && pB) {
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const char *strA = pA->data;
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const char *strB = pB->data;
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/* skip directories, we don't care about dir conflicts */
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if(strA[strlen(strA)-1] == '/') {
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pA = pA->next;
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} else if(strB[strlen(strB)-1] == '/') {
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pB = pB->next;
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} else {
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int cmp = strcmp(strA, strB);
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if(cmp < 0) {
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/* item only in filesA, ignore it */
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pA = pA->next;
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} else if(cmp > 0) {
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/* item only in filesB, ignore it */
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pB = pB->next;
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} else {
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/* item in both, record it */
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ret = alpm_list_add(ret, strdup(strA));
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pA = pA->next;
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pB = pB->next;
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}
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}
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}
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return(ret);
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}
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/* Returns a alpm_list_t* of files that are in filesA but *NOT* in filesB
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* This is an 'A minus B' set operation
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* Pre-condition: both lists are sorted!
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*/
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static alpm_list_t *chk_filedifference(alpm_list_t *filesA, alpm_list_t *filesB)
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{
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alpm_list_t *ret = NULL;
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alpm_list_t *pA = filesA, *pB = filesB;
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/* if both filesA and filesB have entries, do this loop */
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while(pA && pB) {
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const char *strA = pA->data;
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const char *strB = pB->data;
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/* skip directories, we don't care about dir conflicts */
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if(strA[strlen(strA)-1] == '/') {
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pA = pA->next;
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} else if(strB[strlen(strB)-1] == '/') {
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pB = pB->next;
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} else {
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int cmp = strcmp(strA, strB);
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if(cmp < 0) {
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/* item only in filesA, record it */
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ret = alpm_list_add(ret, strdup(strA));
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pA = pA->next;
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} else if(cmp > 0) {
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/* item only in fileB, but this means nothing */
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pB = pB->next;
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} else {
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/* item in both, ignore it */
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pA = pA->next;
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pB = pB->next;
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}
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}
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}
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/* ensure we have completely emptied pA */
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while(pA) {
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const char *strA = pA->data;
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/* skip directories */
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if(strA[strlen(strA)-1] != '/') {
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ret = alpm_list_add(ret, strdup(strA));
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}
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pA = pA->next;
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}
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return(ret);
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}
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/* Adds pmfileconflict_t to a conflicts list. Pass the conflicts list, type (either
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* PM_FILECONFLICT_TARGET or PM_FILECONFLICT_FILESYSTEM), a file string, and either
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* two package names or one package name and NULL. This is a wrapper for former
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* functionality that was done inline.
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*/
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static alpm_list_t *add_fileconflict(alpm_list_t *conflicts,
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pmfileconflicttype_t type, const char *filestr,
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const char* name1, const char* name2)
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{
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pmfileconflict_t *conflict;
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MALLOC(conflict, sizeof(pmfileconflict_t), RET_ERR(PM_ERR_MEMORY, NULL));
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conflict->type = type;
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STRDUP(conflict->target, name1, RET_ERR(PM_ERR_MEMORY, NULL));
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STRDUP(conflict->file, filestr, RET_ERR(PM_ERR_MEMORY, NULL));
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if(name2) {
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STRDUP(conflict->ctarget, name2, RET_ERR(PM_ERR_MEMORY, NULL));
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} else {
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conflict->ctarget = "";
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}
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conflicts = alpm_list_add(conflicts, conflict);
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_alpm_log(PM_LOG_DEBUG, "found file conflict %s, packages %s and %s\n",
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filestr, name1, name2 ? name2 : "(filesystem)");
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return(conflicts);
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}
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void _alpm_fileconflict_free(pmfileconflict_t *conflict)
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{
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if(strlen(conflict->ctarget) > 0) {
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FREE(conflict->ctarget);
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}
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FREE(conflict->file);;
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FREE(conflict->target);
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FREE(conflict);
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}
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static int dir_belongsto_pkg(char *dirpath, pmpkg_t *pkg)
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{
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struct dirent *ent = NULL;
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struct stat sbuf;
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char path[PATH_MAX];
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char abspath[PATH_MAX];
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DIR *dir;
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snprintf(abspath, PATH_MAX, "%s%s", handle->root, dirpath);
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dir = opendir(abspath);
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if(dir == NULL) {
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return(1);
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}
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while((ent = readdir(dir)) != NULL) {
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const char *name = ent->d_name;
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if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
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continue;
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}
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snprintf(path, PATH_MAX, "%s/%s", dirpath, name);
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snprintf(abspath, PATH_MAX, "%s%s", handle->root, path);
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if(stat(abspath, &sbuf) != 0) {
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continue;
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}
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if(S_ISDIR(sbuf.st_mode)) {
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if(dir_belongsto_pkg(path, pkg)) {
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continue;
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} else {
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closedir(dir);
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return(0);
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}
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} else {
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if(alpm_list_find_str(alpm_pkg_get_files(pkg), path)) {
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continue;
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} else {
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closedir(dir);
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return(0);
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}
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}
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}
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closedir(dir);
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return(1);
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}
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/* Find file conflicts that may occur during the transaction with two checks:
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* 1: check every target against every target
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* 2: check every target against the filesystem */
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alpm_list_t *_alpm_db_find_fileconflicts(pmdb_t *db, pmtrans_t *trans,
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alpm_list_t *upgrade, alpm_list_t *remove)
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{
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alpm_list_t *i, *j, *conflicts = NULL;
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size_t numtargs = alpm_list_count(upgrade);
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size_t current;
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ALPM_LOG_FUNC;
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if(db == NULL || upgrade == NULL || trans == NULL) {
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return(NULL);
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}
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/* TODO this whole function needs a huge change, which hopefully will
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* be possible with real transactions. Right now we only do half as much
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* here as we do when we actually extract files in add.c with our 12
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* different cases. */
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for(current = 0, i = upgrade; i; i = i->next, current++) {
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alpm_list_t *k, *tmpfiles = NULL;
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pmpkg_t *p1, *p2, *dbpkg;
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char path[PATH_MAX+1];
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p1 = i->data;
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if(!p1) {
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continue;
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}
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int percent = (current * 100) / numtargs;
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PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", percent,
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numtargs, current);
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/* CHECK 1: check every target against every target */
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_alpm_log(PM_LOG_DEBUG, "searching for file conflicts: %s\n",
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alpm_pkg_get_name(p1));
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for(j = i->next; j; j = j->next) {
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p2 = j->data;
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if(!p2) {
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continue;
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}
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tmpfiles = chk_fileconflicts(alpm_pkg_get_files(p1), alpm_pkg_get_files(p2));
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if(tmpfiles) {
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for(k = tmpfiles; k; k = k->next) {
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snprintf(path, PATH_MAX, "%s%s", handle->root, (char *)k->data);
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conflicts = add_fileconflict(conflicts, PM_FILECONFLICT_TARGET, path,
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alpm_pkg_get_name(p1), alpm_pkg_get_name(p2));
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}
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FREELIST(tmpfiles);
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}
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}
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/* declarations for second check */
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struct stat lsbuf, sbuf;
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char *filestr = NULL;
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/* CHECK 2: check every target against the filesystem */
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_alpm_log(PM_LOG_DEBUG, "searching for filesystem conflicts: %s\n", p1->name);
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dbpkg = _alpm_db_get_pkgfromcache(db, p1->name);
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/* Do two different checks here. If the package is currently installed,
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* then only check files that are new in the new package. If the package
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* is not currently installed, then simply stat the whole filelist */
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if(dbpkg) {
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/* older ver of package currently installed */
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tmpfiles = chk_filedifference(alpm_pkg_get_files(p1),
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alpm_pkg_get_files(dbpkg));
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} else {
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/* no version of package currently installed */
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tmpfiles = alpm_list_strdup(alpm_pkg_get_files(p1));
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}
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for(j = tmpfiles; j; j = j->next) {
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filestr = j->data;
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snprintf(path, PATH_MAX, "%s%s", handle->root, filestr);
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/* stat the file - if it exists, do some checks */
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if(_alpm_lstat(path, &lsbuf) != 0) {
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continue;
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}
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stat(path, &sbuf);
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if(path[strlen(path)-1] == '/') {
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if(S_ISDIR(lsbuf.st_mode)) {
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_alpm_log(PM_LOG_DEBUG, "%s is a directory, not a conflict\n", path);
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continue;
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} else if(S_ISLNK(lsbuf.st_mode) && S_ISDIR(sbuf.st_mode)) {
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_alpm_log(PM_LOG_DEBUG,
|
|
"%s is a symlink to a dir, hopefully not a conflict\n", path);
|
|
continue;
|
|
}
|
|
}
|
|
_alpm_log(PM_LOG_DEBUG, "checking possible conflict: %s\n", path);
|
|
|
|
int resolved_conflict = 0; /* have we acted on this conflict? */
|
|
|
|
/* Check remove list (will we remove the conflicting local file?) */
|
|
for(k = remove; k && !resolved_conflict; k = k->next) {
|
|
pmpkg_t *rempkg = k->data;
|
|
if(rempkg && alpm_list_find_str(alpm_pkg_get_files(rempkg), filestr)) {
|
|
_alpm_log(PM_LOG_DEBUG, "local file will be removed, not a conflict: %s\n", filestr);
|
|
resolved_conflict = 1;
|
|
}
|
|
}
|
|
|
|
/* Look at all the targets to see if file has changed hands */
|
|
for(k = upgrade; k && !resolved_conflict; k = k->next) {
|
|
p2 = k->data;
|
|
if(!p2 || strcmp(p1->name, p2->name) == 0) {
|
|
continue;
|
|
}
|
|
pmpkg_t *localp2 = _alpm_db_get_pkgfromcache(db, p2->name);
|
|
|
|
/* localp2->files will be removed (target conflicts are handled by CHECK 1) */
|
|
if(localp2 && alpm_list_find_str(alpm_pkg_get_files(localp2), filestr)) {
|
|
/* skip removal of file, but not add. this will prevent a second
|
|
* package from removing the file when it was already installed
|
|
* by its new owner (whether the file is in backup array or not */
|
|
trans->skip_remove = alpm_list_add(trans->skip_remove, strdup(filestr));
|
|
_alpm_log(PM_LOG_DEBUG, "file changed packages, adding to remove skiplist: %s\n", filestr);
|
|
resolved_conflict = 1;
|
|
}
|
|
}
|
|
|
|
/* check if all files of the dir belong to the installed pkg */
|
|
if(!resolved_conflict && S_ISDIR(lsbuf.st_mode) && dbpkg) {
|
|
char *dir = malloc(strlen(filestr) + 2);
|
|
sprintf(dir, "%s/", filestr);
|
|
if(alpm_list_find_str(alpm_pkg_get_files(dbpkg),dir)) {
|
|
_alpm_log(PM_LOG_DEBUG, "check if all files in %s belongs to %s\n",
|
|
dir, dbpkg->name);
|
|
resolved_conflict = dir_belongsto_pkg(filestr, dbpkg);
|
|
}
|
|
free(dir);
|
|
}
|
|
|
|
if(!resolved_conflict && dbpkg) {
|
|
char *rpath = calloc(PATH_MAX+1, sizeof(char));
|
|
if(!realpath(path, rpath)) {
|
|
FREE(rpath);
|
|
continue;
|
|
}
|
|
char *filestr = rpath + strlen(handle->root);
|
|
if(alpm_list_find_str(alpm_pkg_get_files(dbpkg),filestr)) {
|
|
resolved_conflict = 1;
|
|
}
|
|
free(rpath);
|
|
}
|
|
|
|
if(!resolved_conflict) {
|
|
_alpm_log(PM_LOG_DEBUG, "file found in conflict: %s\n", path);
|
|
conflicts = add_fileconflict(conflicts, PM_FILECONFLICT_FILESYSTEM,
|
|
path, p1->name, NULL);
|
|
}
|
|
}
|
|
FREELIST(tmpfiles);
|
|
}
|
|
PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", 100,
|
|
numtargs, current);
|
|
|
|
return(conflicts);
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_conflict_get_package1(pmconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->package1;
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_conflict_get_package2(pmconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->package2;
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_conflict_get_reason(pmconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->reason;
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_fileconflict_get_target(pmfileconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->target;
|
|
}
|
|
|
|
pmfileconflicttype_t SYMEXPORT alpm_fileconflict_get_type(pmfileconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(-1));
|
|
ASSERT(conflict != NULL, return(-1));
|
|
|
|
return conflict->type;
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_fileconflict_get_file(pmfileconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->file;
|
|
}
|
|
|
|
const char SYMEXPORT *alpm_fileconflict_get_ctarget(pmfileconflict_t *conflict)
|
|
{
|
|
ALPM_LOG_FUNC;
|
|
|
|
/* Sanity checks */
|
|
ASSERT(handle != NULL, return(NULL));
|
|
ASSERT(conflict != NULL, return(NULL));
|
|
|
|
return conflict->ctarget;
|
|
}
|
|
/* vim: set ts=2 sw=2 noet: */
|