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719ff509c4
pacman/lib/libalpm/conflict.c
Aurelien Foret 719ff509c4 reworked log messages
2006-01-17 21:18:12 +00:00

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/*
* conflict.c
*
* Copyright (c) 2002-2006 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>
#ifdef CYGWIN
#include <limits.h> /* PATH_MAX */
#endif
#include <sys/stat.h>
/* pacman */
#include "util.h"
#include "log.h"
#include "cache.h"
#include "deps.h"
#include "conflict.h"
/* Returns a PMList* of missing_t pointers.
*
* conflicts are always name only
*/
PMList *checkconflicts(pmdb_t *db, PMList *packages)
{
pmpkg_t *info = NULL;
PMList *i, *j, *k;
PMList *baddeps = NULL;
pmdepmissing_t *miss = NULL;
if(db == NULL) {
return(NULL);
}
for(i = packages; i; i = i->next) {
pmpkg_t *tp = i->data;
if(tp == NULL) {
continue;
}
for(j = tp->conflicts; j; j = j->next) {
if(!strcmp(tp->name, j->data)) {
/* a package cannot conflict with itself -- that's just not nice */
continue;
}
/* CHECK 1: check targets against database */
for(k = db_get_pkgcache(db); k; k = k->next) {
pmpkg_t *dp = (pmpkg_t *)k->data;
if(!strcmp(dp->name, tp->name)) {
/* a package cannot conflict with itself -- that's just not nice */
continue;
}
if(!strcmp(j->data, dp->name)) {
/* conflict */
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, dp->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: targs vs db: adding %s as a conflict for %s",
dp->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if dp provides something in tp's conflict list */
PMList *m;
for(m = dp->provides; m; m = m->next) {
if(!strcmp(m->data, j->data)) {
/* confict */
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, dp->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: targs vs db: adding %s as a conflict for %s",
dp->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
/* CHECK 2: check targets against targets */
for(k = packages; k; k = k->next) {
pmpkg_t *otp = (pmpkg_t *)k->data;
if(!strcmp(otp->name, tp->name)) {
/* a package cannot conflict with itself -- that's just not nice */
continue;
}
if(!strcmp(otp->name, (char *)j->data)) {
/* otp is listed in tp's conflict list */
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, otp->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: targs vs targs: adding %s as a conflict for %s",
otp->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if otp provides something in tp's conflict list */
PMList *m;
for(m = otp->provides; m; m = m->next) {
if(!strcmp(m->data, j->data)) {
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, otp->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: targs vs targs: adding %s as a conflict for %s",
otp->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
}
/* CHECK 3: check database against targets */
for(k = db_get_pkgcache(db); k; k = k->next) {
info = k->data;
if(!strcmp(info->name, tp->name)) {
/* a package cannot conflict with itself -- that's just not nice */
continue;
}
for(j = info->conflicts; j; j = j->next) {
if(!strcmp((char *)j->data, tp->name)) {
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, info->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: db vs targs: adding %s as a conflict for %s",
info->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if the db package conflicts with something we provide */
PMList *m;
for(m = info->conflicts; m; m = m->next) {
PMList *n;
for(n = tp->provides; n; n = n->next) {
if(!strcmp(m->data, n->data)) {
MALLOC(miss, sizeof(pmdepmissing_t));
miss->type = PM_DEP_TYPE_CONFLICT;
miss->depend.mod = PM_DEP_MOD_ANY;
miss->depend.version[0] = '\0';
STRNCPY(miss->target, tp->name, PKG_NAME_LEN);
STRNCPY(miss->depend.name, info->name, PKG_NAME_LEN);
if(!pm_list_is_in(miss, baddeps)) {
_alpm_log(PM_LOG_DEBUG, "checkconflict: db vs targs: adding %s as a conflict for %s",
info->name, tp->name);
baddeps = pm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
}
}
}
return(baddeps);
}
PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root, PMList **skip_list)
{
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 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 2: 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) {
int isdir = 0;
filestr = (char*)j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
/* is this target a file or directory? */
if(path[strlen(path)-1] == '/') {
isdir = 1;
path[strlen(path)-1] = '\0';
}
if(!lstat(path, &buf)) {
int ok = 0;
if(!S_ISLNK(buf.st_mode) && ((isdir && !S_ISDIR(buf.st_mode)) || (!isdir && S_ISDIR(buf.st_mode)))) {
/* if the package target is a directory, and the filesystem target
* is not (or vice versa) then it's a conflict
*/
ok = 0;
goto donecheck;
}
/* re-fetch with stat() instead of lstat() */
stat(path, &buf);
if(S_ISDIR(buf.st_mode)) {
/* if it's a directory, then we have no conflict */
ok = 1;
} else {
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;
/* Add to the "skip list" of files that we shouldn't remove during an upgrade.
*
* This is a workaround for the following scenario:
*
* - the old package A provides file X
* - the new package A does not
* - the new package B provides file X
* - package A depends on B, so B is upgraded first
*
* Package B is upgraded, so file X is installed. Then package A
* is upgraded, and it *removes* file X, since it no longer exists
* in package A.
*
* Our workaround is to scan through all "old" packages and all "new"
* ones, looking for files that jump to different packages.
*/
*skip_list = pm_list_add(*skip_list, strdup(filestr));
}
FREEPKG(dbpkg2);
}
}
}
}
donecheck:
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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