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pacman/lib/libalpm/conflict.c
Dan McGee 7e6350a9af * Updated a too-verbose message in pacman/add.c. (shouldn't be an issue withi 
translations, but may want to update at some point)
* More libalpm/conflict.c changes. Optimized more, hopefully won't need too
  much more than this.
2007-02-14 04:52:17 +00:00

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/*
* conflict.c
*
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
* Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
* Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
* Copyright (c) 2006 by Christian Hamar <krics@linuxforum.hu>
*
* 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.
*/
#if defined(__APPLE__) || defined(__OpenBSD__)
#include <sys/syslimits.h>
#endif
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <sys/stat.h>
#include <libintl.h>
/* pacman */
#include "handle.h"
#include "alpm_list.h"
#include "trans.h"
#include "util.h"
#include "error.h"
#include "log.h"
#include "cache.h"
#include "deps.h"
#include "conflict.h"
/* Returns a alpm_list_t* of pmdepmissing_t pointers.
*
* conflicts are always name only
*/
alpm_list_t *_alpm_checkconflicts(pmdb_t *db, alpm_list_t *packages)
{
pmpkg_t *info = NULL;
alpm_list_t *i, *j, *k;
alpm_list_t *baddeps = NULL;
pmdepmissing_t *miss = NULL;
ALPM_LOG_FUNC;
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 */
_alpm_log(PM_LOG_DEBUG, _("checkconflicts: targ '%s' vs db"), tp->name);
for(k = _alpm_db_get_pkgcache(db, INFRQ_DEPENDS); 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 */
_alpm_log(PM_LOG_DEBUG, _("targs vs db: found %s as a conflict for %s"),
dp->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, dp->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if dp provides something in tp's conflict list */
alpm_list_t *m;
for(m = dp->provides; m; m = m->next) {
if(!strcmp(m->data, j->data)) {
/* confict */
_alpm_log(PM_LOG_DEBUG, _("targs vs db: found %s as a conflict for %s"),
dp->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, dp->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
/* CHECK 2: check targets against targets */
_alpm_log(PM_LOG_DEBUG, _("checkconflicts: targ '%s' vs targs"), tp->name);
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 */
_alpm_log(PM_LOG_DEBUG, _("targs vs targs: found %s as a conflict for %s"),
otp->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, otp->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if otp provides something in tp's conflict list */
alpm_list_t *m;
for(m = otp->provides; m; m = m->next) {
if(!strcmp(m->data, j->data)) {
_alpm_log(PM_LOG_DEBUG, _("targs vs targs: found %s as a conflict for %s"),
otp->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, otp->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
}
/* CHECK 3: check database against targets */
_alpm_log(PM_LOG_DEBUG, _("checkconflicts: db vs targ '%s'"), tp->name);
for(k = _alpm_db_get_pkgcache(db, INFRQ_DEPENDS); k; k = k->next) {
alpm_list_t *conflicts = NULL;
int usenewconflicts = 0;
info = k->data;
if(!strcmp(info->name, tp->name)) {
/* a package cannot conflict with itself -- that's just not nice */
continue;
}
/* If this package (*info) is also in our packages alpm_list_t, use the
* conflicts list from the new package, not the old one (*info)
*/
for(j = packages; j; j = j->next) {
pmpkg_t *pkg = j->data;
if(!strcmp(pkg->name, info->name)) {
/* Use the new, to-be-installed package's conflicts */
conflicts = pkg->conflicts;
usenewconflicts = 1;
}
}
if(!usenewconflicts) {
/* Use the old package's conflicts, it's the only set we have */
conflicts = info->conflicts;
}
for(j = conflicts; j; j = j->next) {
if(!strcmp((char *)j->data, tp->name)) {
_alpm_log(PM_LOG_DEBUG, _("db vs targs: found %s as a conflict for %s"),
info->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, info->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
} else {
/* see if the db package conflicts with something we provide */
alpm_list_t *m;
for(m = conflicts; m; m = m->next) {
alpm_list_t *n;
for(n = tp->provides; n; n = n->next) {
if(!strcmp(m->data, n->data)) {
_alpm_log(PM_LOG_DEBUG, _("db vs targs: found %s as a conflict for %s"),
info->name, tp->name);
miss = _alpm_depmiss_new(tp->name, PM_DEP_TYPE_CONFLICT, PM_DEP_MOD_ANY, info->name, NULL);
if(!_alpm_depmiss_isin(miss, baddeps)) {
baddeps = alpm_list_add(baddeps, miss);
} else {
FREE(miss);
}
}
}
}
}
}
}
}
return(baddeps);
}
/* Returns a alpm_list_t* of file conflicts.
* Hooray for set-intersects!
* Pre-condition: both lists are sorted!
*/
static alpm_list_t *chk_fileconflicts(alpm_list_t *filesA, alpm_list_t *filesB)
{
alpm_list_t *ret = NULL;
alpm_list_t *pA = filesA, *pB = filesB;
while(pA && pB) {
const char *strA = pA->data;
const char *strB = pB->data;
/* skip directories, we don't care about dir conflicts */
if(strA[strlen(strA)-1] == '/') {
pA = pA->next;
} else if(strB[strlen(strB)-1] == '/') {
pB = pB->next;
} else {
int cmp = strcmp(strA, strB);
if(cmp < 0) {
/* item only in filesA, ignore it */
pA = pA->next;
} else if(cmp > 0) {
/* item only in filesB, ignore it */
pB = pB->next;
} else {
/* item in both, record it */
ret = alpm_list_add(ret, strdup(strA));
pA = pA->next;
pB = pB->next;
}
}
}
for(alpm_list_t *i = ret; i; i = i->next) {
_alpm_log(PM_LOG_DEBUG, "found conflict = %s", i->data);
}
return(ret);
}
/* Returns a alpm_list_t* of files that are in filesA but *NOT* in filesB
* This is an 'A minus B' set operation
* Pre-condition: both lists are sorted!
*/
static alpm_list_t *chk_filedifference(alpm_list_t *filesA, alpm_list_t *filesB)
{
alpm_list_t *ret = NULL;
alpm_list_t *pA = filesA, *pB = filesB;
while(pA && pB) {
const char *strA = pA->data;
const char *strB = pB->data;
/* skip directories, we don't care about dir conflicts */
if(strA[strlen(strA)-1] == '/') {
pA = pA->next;
} else if(strB[strlen(strB)-1] == '/') {
pB = pB->next;
} else {
int cmp = strcmp(strA, strB);
if(cmp < 0) {
/* item only in filesA, record it */
ret = alpm_list_add(ret, strdup(strA));
pA = pA->next;
} else if(cmp > 0) {
/* item only in fileB, but this means nothing */
pB = pB->next;
} else {
/* item in both, ignore it */
pA = pA->next;
pB = pB->next;
}
}
}
for(alpm_list_t *i = ret; i; i = i->next) {
_alpm_log(PM_LOG_DEBUG, "found conflict = %s", i->data);
}
return(ret);
}
/* Adds a PM_CONFLICT_TYPE_FILE to a conflicts list.
* Pass the conflicts list, package name, and a file string of the conflict.
*/
static alpm_list_t *add_fileconflict(alpm_list_t *conflicts, char *name,
char *filestr)
{
pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
if(conflict == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
sizeof(pmconflict_t));
return(conflicts);
}
conflict->type = PM_CONFLICT_TYPE_FILE;
STRNCPY(conflict->target, name, PKG_NAME_LEN);
STRNCPY(conflict->file, filestr, CONFLICT_FILE_LEN);
conflict->ctarget[0] = 0;
conflicts = alpm_list_add(conflicts, conflict);
return(conflicts);
}
alpm_list_t *_alpm_db_find_conflicts(pmdb_t *db, pmtrans_t *trans, char *root,
alpm_list_t **skip_list)
{
alpm_list_t *i, *j, *k;
alpm_list_t *conflicts = NULL;
alpm_list_t *tmpfiles = NULL;
alpm_list_t *targets = trans->packages;
int numtargs = alpm_list_count(targets);
double percent;
ALPM_LOG_FUNC;
if(db == NULL || targets == NULL || root == NULL) {
return(NULL);
}
for(i = targets; i; i = i->next) {
pmpkg_t *p1, *p2, *dbpkg;
char *filestr = NULL;
char path[PATH_MAX+1];
struct stat buf;
p1 = (pmpkg_t*)i->data;
percent = (double)(alpm_list_count(targets) - alpm_list_count(i) + 1)
/ alpm_list_count(targets);
PROGRESS(trans, PM_TRANS_PROGRESS_CONFLICTS_START, "", (percent * 100),
numtargs, (numtargs - alpm_list_count(i) +1));
/* CHECK 1: check every target against every target */
for(j = i->next; j; j = j->next) {
p2 = (pmpkg_t*)j->data;
tmpfiles = chk_fileconflicts(p1->files, p2->files);
if(tmpfiles) {
for(k = tmpfiles; k; k = k->next) {
pmconflict_t *conflict = malloc(sizeof(pmconflict_t));
if(conflict == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"),
sizeof(pmconflict_t));
continue;
}
conflict->type = PM_CONFLICT_TYPE_TARGET;
STRNCPY(conflict->target, p1->name, PKG_NAME_LEN);
STRNCPY(conflict->file, k->data, CONFLICT_FILE_LEN);
STRNCPY(conflict->ctarget, p2->name, PKG_NAME_LEN);
conflicts = alpm_list_add(conflicts, conflict);
}
alpm_list_free_inner(tmpfiles, &free);
alpm_list_free(tmpfiles);
}
}
/* CHECK 2: check every target against the filesystem */
dbpkg = _alpm_db_get_pkgfromcache(db, p1->name);
/* Do two different checks here. f the package is currently installed,
* then only check files that are new in the new package. If the package
* is not currently installed, then simply stat the whole filelist */
if(dbpkg) {
/* older ver of package currently installed */
tmpfiles = chk_filedifference(p1->files, alpm_pkg_get_files(dbpkg));
for(j = tmpfiles; j; j = j->next) {
filestr = j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
/* stat the file - if it exists and is not a dir, do some checks */
if(lstat(path, &buf) == 0 && !S_ISDIR(buf.st_mode)) {
/* Look at all the targets to see if file has changed hands */
for(k = targets; k; k = k->next) {
pmpkg_t *p2 = (pmpkg_t *)k->data;
/* Ensure we aren't looking at current package */
if(strcmp(p2->name, p1->name)) {
pmpkg_t *localp2 = _alpm_db_get_pkgfromcache(db, p2->name);
/* Check if it used to exist in a package, but doesn't anymore */
if(localp2 && !alpm_list_find_str(alpm_pkg_get_files(p2), filestr)
&& alpm_list_find_str(alpm_pkg_get_files(localp2), filestr)) {
*skip_list = alpm_list_add(*skip_list, strdup(filestr));
} else {
conflicts = add_fileconflict(conflicts, p1->name, filestr);
break;
}
}
}
}
}
alpm_list_free_inner(tmpfiles, &free);
alpm_list_free(tmpfiles);
} else {
/* no version of package currently installed */
for(j = p1->files; j; j = j->next) {
filestr = j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
/* stat the file - if it exists and is not a dir, report a conflict */
if(lstat(path, &buf) == 0 && !S_ISDIR(buf.st_mode)) {
conflicts = add_fileconflict(conflicts, p1->name, filestr);
}
}
}
}
return(conflicts);
}
const char SYMEXPORT *alpm_conflict_get_target(pmconflict_t *conflict)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, return(NULL));
ASSERT(conflict != NULL, return(NULL));
return conflict->target;
}
pmconflicttype_t SYMEXPORT alpm_conflict_get_type(pmconflict_t *conflict)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, return(-1));
ASSERT(conflict != NULL, return(-1));
return conflict->type;
}
const char SYMEXPORT *alpm_conflict_get_file(pmconflict_t *conflict)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, return(NULL));
ASSERT(conflict != NULL, return(NULL));
return conflict->file;
}
const char SYMEXPORT *alpm_conflict_get_ctarget(pmconflict_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: */
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