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/*
* conflict.c
*
* Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.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 <unistd.h>
#include <string.h>
#include <sys/stat.h>
/* pacman */
#include "util.h"
#include "conflict.h"
PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
{
PMList *i, *j, *k;
char *filestr = NULL;
char path[PATH_MAX+1];
char *str = NULL;
struct stat buf, buf2;
PMList *conflicts = NULL;
if(db == NULL || targets == NULL || root == NULL) {
return(NULL);
}
/* CHECK 1: check every db package against every target package */
/* XXX: I've disabled the database-against-targets check for now, as the
* many many strcmp() calls slow it down heavily and most of the
* checking is redundant to the targets-against-filesystem check.
* This will be re-enabled if I can improve performance significantly.
*
pmpkg_t *info = NULL;
char *dbstr = NULL;
db_rewind(db);
while((info = db_scan(db, NULL, INFRQ_DESC | INFRQ_FILES)) != NULL) {
for(i = info->files; i; i = i->next) {
if(i->data == NULL) continue;
dbstr = (char*)i->data;
for(j = targets; j; j = j->next) {
pmpkg_t *targ = (pmpkg_t*)j->data;
if(strcmp(info->name, targ->name)) {
for(k = targ->files; k; k = k->next) {
filestr = (char*)k->data;
if(!strcmp(dbstr, filestr)) {
if(rindex(k->data, '/') == filestr+strlen(filestr)-1) {
continue;
}
MALLOC(str, 512);
snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (installed)", dbstr,
targ->name, info->name);
conflicts = pm_list_add(conflicts, str);
}
}
}
}
}
FREEPKG(info);
}*/
/* CHECK 2: check every target against every target */
for(i = targets; i; i = i->next) {
pmpkg_t *p1 = (pmpkg_t*)i->data;
for(j = i; j; j = j->next) {
pmpkg_t *p2 = (pmpkg_t*)j->data;
if(strcmp(p1->name, p2->name)) {
for(k = p1->files; k; k = k->next) {
filestr = k->data;
if(!strcmp(filestr, "._install") || !strcmp(filestr, ".INSTALL")) {
continue;
}
if(rindex(filestr, '/') == filestr+strlen(filestr)-1) {
/* this filename has a trailing '/', so it's a directory -- skip it. */
continue;
}
if(pm_list_is_strin(filestr, p2->files)) {
MALLOC(str, 512);
snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (target)",
filestr, p1->name, p2->name);
conflicts = pm_list_add(conflicts, str);
}
}
}
}
}
/* CHECK 3: check every target against the filesystem */
for(i = targets; i; i = i->next) {
pmpkg_t *p = (pmpkg_t*)i->data;
pmpkg_t *dbpkg = NULL;
for(j = p->files; j; j = j->next) {
filestr = (char*)j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
if(!stat(path, &buf) && !S_ISDIR(buf.st_mode)) {
int ok = 0;
if(dbpkg == NULL) {
dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
}
if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
ok = 1;
}
/* Make sure that the supposedly-conflicting file is not actually just
* a symlink that points to a path that used to exist in the package.
*/
/* Check if any part of the conflicting file's path is a symlink */
if(dbpkg && !ok) {
char str[PATH_MAX];
for(k = dbpkg->files; k; k = k->next) {
snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
stat(str, &buf2);
if(buf.st_ino == buf2.st_ino) {
ok = 1;
}
}
}
/* Check if the conflicting file has been moved to another package/target */
if(!ok) {
/* Look at all the targets */
for(k = targets; k && !ok; k = k->next) {
pmpkg_t *p1 = (pmpkg_t *)k->data;
/* As long as they're not the current package */
if(strcmp(p1->name, p->name)) {
pmpkg_t *dbpkg2 = NULL;
dbpkg2 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
/* If it used to exist in there, but doesn't anymore */
if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
ok = 1;
}
FREEPKG(dbpkg2);
}
}
}
if(!ok) {
MALLOC(str, 512);
snprintf(str, 512, "%s: %s: exists in filesystem", p->name, path);
conflicts = pm_list_add(conflicts, str);
}
}
}
FREEPKG(dbpkg);
}
return(conflicts);
}
/* vim: set ts=2 sw=2 noet: */
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