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pacman/lib/libalpm/remove.c

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/*
* remove.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 <errno.h>
#include <time.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <zlib.h>
#include <libtar.h>
/* pacman */
#include "util.h"
#include "error.h"
#include "versioncmp.h"
#include "md5.h"
#include "log.h"
#include "backup.h"
#include "package.h"
#include "db.h"
#include "cache.h"
#include "deps.h"
#include "provide.h"
#include "remove.h"
#include "handle.h"
#include "alpm.h"
extern pmhandle_t *handle;
int _alpm_remove_loadtarget(pmtrans_t *trans, pmdb_t *db, char *name)
{
pmpkg_t *info;
ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(name != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
if(_alpm_pkg_isin(name, trans->packages)) {
RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
}
if((info = _alpm_db_scan(db, name, INFRQ_ALL)) == NULL) {
_alpm_log(PM_LOG_ERROR, "could not find %s in database", name);
RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
}
_alpm_log(PM_LOG_FLOW2, "adding %s in the targets list", info->name);
trans->packages = _alpm_list_add(trans->packages, info);
return(0);
}
int _alpm_remove_prepare(pmtrans_t *trans, pmdb_t *db, PMList **data)
{
PMList *lp;
ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
if(!(trans->flags & (PM_TRANS_FLAG_NODEPS)) && (trans->type != PM_TRANS_TYPE_UPGRADE)) {
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_START, NULL, NULL);
_alpm_log(PM_LOG_FLOW1, "looking for unsatisfied dependencies");
lp = _alpm_checkdeps(db, trans->type, trans->packages);
if(lp != NULL) {
if(trans->flags & PM_TRANS_FLAG_CASCADE) {
while(lp) {
PMList *i;
for(i = lp; i; i = i->next) {
pmdepmissing_t *miss = (pmdepmissing_t *)i->data;
pmpkg_t *info = _alpm_db_scan(db, miss->depend.name, INFRQ_ALL);
if(info) {
_alpm_log(PM_LOG_FLOW2, "pulling %s in the targets list", info->name);
trans->packages = _alpm_list_add(trans->packages, info);
} else {
_alpm_log(PM_LOG_ERROR, "could not find %s in database -- skipping",
miss->depend.name);
}
}
FREELIST(lp);
lp = _alpm_checkdeps(db, trans->type, trans->packages);
}
} else {
if(data) {
*data = lp;
} else {
FREELIST(lp);
}
RET_ERR(PM_ERR_UNSATISFIED_DEPS, -1);
}
}
if(trans->flags & PM_TRANS_FLAG_RECURSE) {
_alpm_log(PM_LOG_FLOW1, "finding removable dependencies");
trans->packages = _alpm_removedeps(db, trans->packages);
}
/* re-order w.r.t. dependencies */
_alpm_log(PM_LOG_FLOW1, "sorting by dependencies");
lp = _alpm_sortbydeps(trans->packages, PM_TRANS_TYPE_REMOVE);
/* free the old alltargs */
FREELISTPTR(trans->packages);
trans->packages = lp;
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_DONE, NULL, NULL);
}
return(0);
}
/* Helper function for comparing strings
*/
static int str_cmp(const void *s1, const void *s2)
{
return(strcmp(s1, s2));
}
int _alpm_remove_commit(pmtrans_t *trans, pmdb_t *db)
{
pmpkg_t *info;
struct stat buf;
PMList *targ, *lp;
char line[PATH_MAX+1];
ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
for(targ = trans->packages; targ; targ = targ->next) {
char pm_install[PATH_MAX];
info = (pmpkg_t*)targ->data;
if(trans->type != PM_TRANS_TYPE_UPGRADE) {
EVENT(trans, PM_TRANS_EVT_REMOVE_START, info, NULL);
_alpm_log(PM_LOG_FLOW1, "removing package %s-%s", info->name, info->version);
/* run the pre-remove scriptlet if it exists */
if(info->scriptlet && !(trans->flags & PM_TRANS_FLAG_NOSCRIPTLET)) {
snprintf(pm_install, PATH_MAX, "%s/%s-%s/install", db->path, info->name, info->version);
_alpm_runscriptlet(handle->root, pm_install, "pre_remove", info->version, NULL);
}
}
if(!(trans->flags & PM_TRANS_FLAG_DBONLY)) {
_alpm_log(PM_LOG_FLOW1, "removing files");
/* iterate through the list backwards, unlinking files */
for(lp = _alpm_list_last(info->files); lp; lp = lp->prev) {
int nb = 0;
char *file = lp->data;
char *md5 = _alpm_needbackup(file, info->backup);
if(md5) {
nb = 1;
free(md5);
}
if(!nb && trans->type == PM_TRANS_TYPE_UPGRADE) {
/* check noupgrade */
if(_alpm_list_is_strin(file, handle->noupgrade)) {
nb = 1;
}
}
snprintf(line, PATH_MAX, "%s%s", handle->root, file);
if(lstat(line, &buf)) {
_alpm_log(PM_LOG_DEBUG, "file %s does not exist", file);
continue;
}
if(S_ISDIR(buf.st_mode)) {
if(rmdir(line)) {
/* this is okay, other packages are probably using it. */
_alpm_log(PM_LOG_DEBUG, "keeping directory %s", file);
} else {
_alpm_log(PM_LOG_FLOW2, "removing directory %s", file);
}
} else {
/* check the "skip list" before removing the file.
* see the big comment block in db_find_conflicts() for an
* explanation. */
int skipit = 0;
PMList *j;
for(j = trans->skiplist; j; j = j->next) {
if(!strcmp(file, (char*)j->data)) {
skipit = 1;
}
}
if(skipit) {
_alpm_log(PM_LOG_FLOW2, "skipping removal of %s as it has moved to another package",
file);
} else {
/* if the file is flagged, back it up to .pacsave */
if(nb) {
if(trans->type == PM_TRANS_TYPE_UPGRADE) {
/* we're upgrading so just leave the file as is. pacman_add() will handle it */
} else {
if(!(trans->flags & PM_TRANS_FLAG_NOSAVE)) {
char newpath[PATH_MAX];
snprintf(newpath, PATH_MAX, "%s.pacsave", line);
rename(line, newpath);
_alpm_log(PM_LOG_WARNING, "%s saved as %s", file, newpath);
alpm_logaction("%s saved as %s", line, newpath);
} else {
_alpm_log(PM_LOG_FLOW2, "unlinking %s", file);
if(unlink(line)) {
_alpm_log(PM_LOG_ERROR, "cannot remove file %s", file);
}
}
}
} else {
_alpm_log(PM_LOG_FLOW2, "unlinking %s", file);
if(unlink(line)) {
_alpm_log(PM_LOG_ERROR, "cannot remove file %s", file);
}
}
}
}
}
}
if(trans->type != PM_TRANS_TYPE_UPGRADE) {
/* run the post-remove script if it exists */
if(info->scriptlet && !(trans->flags & PM_TRANS_FLAG_NOSCRIPTLET)) {
char pm_install[PATH_MAX];
snprintf(pm_install, PATH_MAX, "%s/%s-%s/install", db->path, info->name, info->version);
_alpm_runscriptlet(handle->root, pm_install, "post_remove", info->version, NULL);
}
}
/* remove the package from the database */
_alpm_log(PM_LOG_FLOW1, "updating database");
_alpm_log(PM_LOG_FLOW2, "removing database entry '%s'", info->name);
if(_alpm_db_remove(db, info) == -1) {
_alpm_log(PM_LOG_ERROR, "could not remove database entry %s-%s", info->name, info->version);
}
if(_alpm_db_remove_pkgfromcache(db, info) == -1) {
_alpm_log(PM_LOG_ERROR, "could not remove entry '%s' from cache", info->name);
}
/* update dependency packages' REQUIREDBY fields */
_alpm_log(PM_LOG_FLOW2, "updating dependency packages 'requiredby' fields");
for(lp = info->depends; lp; lp = lp->next) {
pmpkg_t *depinfo = NULL;
pmdepend_t depend;
char *data;
if(_alpm_splitdep((char*)lp->data, &depend)) {
continue;
}
/* if this dependency is in the transaction targets, no need to update
* its requiredby info: it is in the process of being removed (if not
* already done!)
*/
if(_alpm_pkg_isin(depend.name, trans->packages)) {
continue;
}
depinfo = _alpm_db_get_pkgfromcache(db, depend.name);
if(depinfo == NULL) {
/* look for a provides package */
PMList *provides = _alpm_db_whatprovides(db, depend.name);
if(provides) {
/* TODO: should check _all_ packages listed in provides, not just
* the first one.
*/
/* use the first one */
depinfo = _alpm_db_get_pkgfromcache(db, ((pmpkg_t *)provides->data)->name);
FREELISTPTR(provides);
}
if(depinfo == NULL) {
_alpm_log(PM_LOG_ERROR, "could not find dependency '%s'", depend.name);
/* wtf */
continue;
}
}
/* splice out this entry from requiredby */
depinfo->requiredby = _alpm_list_remove(depinfo->requiredby, info->name, str_cmp, (void **)&data);
FREE(data);
_alpm_log(PM_LOG_DEBUG, "updating 'requiredby' field for package '%s'", depinfo->name);
if(_alpm_db_write(db, depinfo, INFRQ_DEPENDS)) {
_alpm_log(PM_LOG_ERROR, "could not update 'requiredby' database entry %s-%s",
depinfo->name, depinfo->version);
}
}
if(trans->type != PM_TRANS_TYPE_UPGRADE) {
EVENT(trans, PM_TRANS_EVT_REMOVE_DONE, info, NULL);
}
}
/* run ldconfig if it exists */
if(trans->type != PM_TRANS_TYPE_UPGRADE) {
_alpm_log(PM_LOG_FLOW1, "running \"ldconfig -r %s\"", handle->root);
_alpm_ldconfig(handle->root);
}
return(0);
}
/* vim: set ts=2 sw=2 noet: */
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