mirror of
https://github.com/moparisthebest/pacman
synced 2024-12-22 15:58:50 -05:00
163 lines
5.0 KiB
C
163 lines
5.0 KiB
C
/*
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* conflict.c
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*
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* Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org>
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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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#include "config.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/stat.h>
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/* pacman */
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#include "util.h"
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#include "conflict.h"
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PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
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{
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PMList *i, *j, *k;
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char *filestr = NULL;
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char path[PATH_MAX+1];
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char *str = NULL;
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struct stat buf, buf2;
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PMList *conflicts = NULL;
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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 db package against every target package */
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/* XXX: I've disabled the database-against-targets check for now, as the
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* many many strcmp() calls slow it down heavily and most of the
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* checking is redundant to the targets-against-filesystem check.
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* This will be re-enabled if I can improve performance significantly.
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*
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pmpkg_t *info = NULL;
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char *dbstr = NULL;
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db_rewind(db);
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while((info = db_scan(db, NULL, INFRQ_DESC | INFRQ_FILES)) != NULL) {
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for(i = info->files; i; i = i->next) {
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if(i->data == NULL) continue;
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dbstr = (char*)i->data;
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for(j = targets; j; j = j->next) {
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pmpkg_t *targ = (pmpkg_t*)j->data;
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if(strcmp(info->name, targ->name)) {
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for(k = targ->files; k; k = k->next) {
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filestr = (char*)k->data;
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if(!strcmp(dbstr, filestr)) {
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if(rindex(k->data, '/') == filestr+strlen(filestr)-1) {
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continue;
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}
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MALLOC(str, 512);
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snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (installed)", dbstr,
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targ->name, info->name);
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conflicts = pm_list_add(conflicts, str);
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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 2: 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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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(!strcmp(filestr, "._install") || !strcmp(filestr, ".INSTALL")) {
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continue;
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}
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if(rindex(filestr, '/') == filestr+strlen(filestr)-1) {
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/* this filename has a trailing '/', so it's a directory -- skip it. */
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continue;
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}
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if(pm_list_is_strin(filestr, p2->files)) {
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MALLOC(str, 512);
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snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (target)",
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filestr, p1->name, p2->name);
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conflicts = pm_list_add(conflicts, str);
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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 every target against the filesystem */
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for(i = targets; i; i = i->next) {
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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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filestr = (char*)j->data;
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snprintf(path, PATH_MAX, "%s%s", root, filestr);
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if(!stat(path, &buf) && !S_ISDIR(buf.st_mode)) {
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int ok = 0;
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if(dbpkg == NULL) {
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dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
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}
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if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
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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 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
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/* If it used to exist in there, but doesn't anymore */
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if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
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ok = 1;
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}
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FREEPKG(dbpkg2);
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}
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}
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}
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if(!ok) {
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MALLOC(str, 512);
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snprintf(str, 512, "%s: %s: exists in filesystem", p->name, path);
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conflicts = pm_list_add(conflicts, str);
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}
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}
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}
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FREEPKG(dbpkg);
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}
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return(conflicts);
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}
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/* vim: set ts=2 sw=2 noet: */
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