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pacman/lib/libalpm/remove.c
Xavier Chantry abefa23341 alpm/remove.c : respect --dbonly during remove-upgrade 
When a -Sk or -Uk operation induced a removal of an existing local
package, --dbonly was not in effect and the files were all removed.

Fixing this behavior was already marked as TODO in database012 pactest
------------
TODO: I honestly think the above should NOT delete the original les, it
hould upgrade the DB entry without touching anything on the file stem.
E.g. this test should be the same as:
   pacman -R --dbonly dummy && pacman -U --dbonly dummy.pkg.tar.gz
------------

Signed-off-by: Xavier Chantry <chantry.xavier@gmail.com>
[Dan: small coding style touchup]
Signed-off-by: Dan McGee <dan@archlinux.org>
2010-12-12 20:19:24 -06:00

474 lines
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/*
* remove.c
*
* Copyright (c) 2006-2010 Pacman Development Team <pacman-dev@archlinux.org>
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
* Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
* Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <sys/stat.h>
/* libalpm */
#include "remove.h"
#include "alpm_list.h"
#include "trans.h"
#include "util.h"
#include "log.h"
#include "backup.h"
#include "package.h"
#include "db.h"
#include "deps.h"
#include "handle.h"
#include "alpm.h"
int SYMEXPORT alpm_remove_target(char *target)
{
pmpkg_t *info;
pmtrans_t *trans;
pmdb_t *db_local;
alpm_list_t *p;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(target != NULL && strlen(target) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1));
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
trans = handle->trans;
db_local = handle->db_local;
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
ASSERT(db_local != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
if(_alpm_pkg_find(trans->remove, target)) {
RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
}
if((info = _alpm_db_get_pkgfromcache(db_local, target)) != NULL) {
_alpm_log(PM_LOG_DEBUG, "adding %s in the target list\n", info->name);
trans->remove = alpm_list_add(trans->remove, _alpm_pkg_dup(info));
return(0);
}
_alpm_log(PM_LOG_DEBUG, "could not find %s in database\n", target);
pmgrp_t *grp = alpm_db_readgrp(db_local, target);
if(grp == NULL) {
RET_ERR(PM_ERR_PKG_NOT_FOUND, -1);
}
for(p = alpm_grp_get_pkgs(grp); p; p = alpm_list_next(p)) {
pmpkg_t *pkg = alpm_list_getdata(p);
_alpm_log(PM_LOG_DEBUG, "adding %s in the target list\n", pkg->name);
trans->remove = alpm_list_add(trans->remove, _alpm_pkg_dup(pkg));
}
return(0);
}
static void remove_prepare_cascade(pmtrans_t *trans, pmdb_t *db,
alpm_list_t *lp)
{
ALPM_LOG_FUNC;
while(lp) {
alpm_list_t *i;
for(i = lp; i; i = i->next) {
pmdepmissing_t *miss = (pmdepmissing_t *)i->data;
pmpkg_t *info = _alpm_db_get_pkgfromcache(db, miss->target);
if(info) {
if(!_alpm_pkg_find(trans->remove, alpm_pkg_get_name(info))) {
_alpm_log(PM_LOG_DEBUG, "pulling %s in target list\n",
alpm_pkg_get_name(info));
trans->remove = alpm_list_add(trans->remove, _alpm_pkg_dup(info));
}
} else {
_alpm_log(PM_LOG_ERROR, _("could not find %s in database -- skipping\n"),
miss->target);
}
}
alpm_list_free_inner(lp, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(lp);
lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
}
}
static void remove_prepare_keep_needed(pmtrans_t *trans, pmdb_t *db,
alpm_list_t *lp)
{
ALPM_LOG_FUNC;
/* Remove needed packages (which break dependencies) from target list */
while(lp != NULL) {
alpm_list_t *i;
for(i = lp; i; i = i->next) {
pmdepmissing_t *miss = (pmdepmissing_t *)i->data;
void *vpkg;
pmpkg_t *pkg = _alpm_pkg_find(trans->remove, miss->causingpkg);
if(pkg == NULL) {
continue;
}
trans->remove = alpm_list_remove(trans->remove, pkg, _alpm_pkg_cmp,
&vpkg);
pkg = vpkg;
if(pkg) {
_alpm_log(PM_LOG_WARNING, _("removing %s from target list\n"),
alpm_pkg_get_name(pkg));
_alpm_pkg_free(pkg);
}
}
alpm_list_free_inner(lp, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(lp);
lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
}
}
int _alpm_remove_prepare(pmtrans_t *trans, pmdb_t *db, alpm_list_t **data)
{
alpm_list_t *lp;
ALPM_LOG_FUNC;
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_RECURSE) && !(trans->flags & PM_TRANS_FLAG_CASCADE)) {
_alpm_log(PM_LOG_DEBUG, "finding removable dependencies\n");
_alpm_recursedeps(db, trans->remove, trans->flags & PM_TRANS_FLAG_RECURSEALL);
}
if(!(trans->flags & PM_TRANS_FLAG_NODEPS)) {
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_START, NULL, NULL);
_alpm_log(PM_LOG_DEBUG, "looking for unsatisfied dependencies\n");
lp = alpm_checkdeps(_alpm_db_get_pkgcache(db), 1, trans->remove, NULL);
if(lp != NULL) {
if(trans->flags & PM_TRANS_FLAG_CASCADE) {
remove_prepare_cascade(trans, db, lp);
} else if (trans->flags & PM_TRANS_FLAG_UNNEEDED) {
/* Remove needed packages (which would break dependencies)
* from target list */
remove_prepare_keep_needed(trans, db, lp);
} else {
if(data) {
*data = lp;
} else {
alpm_list_free_inner(lp, (alpm_list_fn_free)_alpm_depmiss_free);
alpm_list_free(lp);
}
RET_ERR(PM_ERR_UNSATISFIED_DEPS, -1);
}
}
}
/* re-order w.r.t. dependencies */
_alpm_log(PM_LOG_DEBUG, "sorting by dependencies\n");
lp = _alpm_sortbydeps(trans->remove, 1);
/* free the old alltargs */
alpm_list_free(trans->remove);
trans->remove = lp;
/* -Rcs == -Rc then -Rs */
if((trans->flags & PM_TRANS_FLAG_CASCADE) && (trans->flags & PM_TRANS_FLAG_RECURSE)) {
_alpm_log(PM_LOG_DEBUG, "finding removable dependencies\n");
_alpm_recursedeps(db, trans->remove, trans->flags & PM_TRANS_FLAG_RECURSEALL);
}
if(!(trans->flags & PM_TRANS_FLAG_NODEPS)) {
EVENT(trans, PM_TRANS_EVT_CHECKDEPS_DONE, NULL, NULL);
}
return(0);
}
static int can_remove_file(const char *path, alpm_list_t *skip)
{
char file[PATH_MAX+1];
snprintf(file, PATH_MAX, "%s%s", handle->root, path);
if(alpm_list_find_str(skip, file)) {
/* return success because we will never actually remove this file */
return(1);
}
/* If we fail write permissions due to a read-only filesystem, abort.
* Assume all other possible failures are covered somewhere else */
if(access(file, W_OK) == -1) {
if(errno != EACCES && errno != ETXTBSY && access(file, F_OK) == 0) {
/* only return failure if the file ACTUALLY exists and we can't write to
* it - ignore "chmod -w" simple permission failures */
_alpm_log(PM_LOG_ERROR, _("cannot remove file '%s': %s\n"),
file, strerror(errno));
return(0);
}
}
return(1);
}
/* Helper function for iterating through a package's file and deleting them
* Used by _alpm_remove_commit. */
static void unlink_file(pmpkg_t *info, char *filename, alpm_list_t *skip_remove, int nosave)
{
struct stat buf;
char file[PATH_MAX+1];
ALPM_LOG_FUNC;
snprintf(file, PATH_MAX, "%s%s", handle->root, filename);
/* check the remove skip list before removing the file.
* see the big comment block in db_find_fileconflicts() for an
* explanation. */
if(alpm_list_find_str(skip_remove, filename)) {
_alpm_log(PM_LOG_DEBUG, "%s is in skip_remove, skipping removal\n",
file);
return;
}
/* we want to do a lstat here, and not a _alpm_lstat.
* if a directory in the package is actually a directory symlink on the
* filesystem, we want to work with the linked directory instead of the
* actual symlink */
if(lstat(file, &buf)) {
_alpm_log(PM_LOG_DEBUG, "file %s does not exist\n", file);
return;
}
if(S_ISDIR(buf.st_mode)) {
if(rmdir(file)) {
/* this is okay, other packages are probably using it (like /usr) */
_alpm_log(PM_LOG_DEBUG, "keeping directory %s\n", file);
} else {
_alpm_log(PM_LOG_DEBUG, "removing directory %s\n", file);
}
} else {
/* if the file needs backup and has been modified, back it up to .pacsave */
char *pkghash = _alpm_needbackup(filename, alpm_pkg_get_backup(info));
if(pkghash) {
if(nosave) {
_alpm_log(PM_LOG_DEBUG, "transaction is set to NOSAVE, not backing up '%s'\n", file);
FREE(pkghash);
} else {
char *filehash = alpm_compute_md5sum(file);
int cmp = strcmp(filehash,pkghash);
FREE(filehash);
FREE(pkghash);
if(cmp != 0) {
char newpath[PATH_MAX];
snprintf(newpath, PATH_MAX, "%s.pacsave", file);
rename(file, newpath);
_alpm_log(PM_LOG_WARNING, _("%s saved as %s\n"), file, newpath);
alpm_logaction("warning: %s saved as %s\n", file, newpath);
return;
}
}
}
_alpm_log(PM_LOG_DEBUG, "unlinking %s\n", file);
if(unlink(file) == -1) {
_alpm_log(PM_LOG_ERROR, _("cannot remove file '%s': %s\n"),
filename, strerror(errno));
}
}
}
int _alpm_upgraderemove_package(pmpkg_t *oldpkg, pmpkg_t *newpkg, pmtrans_t *trans)
{
alpm_list_t *skip_remove, *b;
alpm_list_t *newfiles, *lp;
alpm_list_t *files = alpm_pkg_get_files(oldpkg);
const char *pkgname = alpm_pkg_get_name(oldpkg);
ALPM_LOG_FUNC;
_alpm_log(PM_LOG_DEBUG, "removing old package first (%s-%s)\n",
oldpkg->name, oldpkg->version);
if(trans->flags & PM_TRANS_FLAG_DBONLY) {
goto db;
}
/* copy the remove skiplist over */
skip_remove =
alpm_list_join(alpm_list_strdup(trans->skip_remove),alpm_list_strdup(handle->noupgrade));
/* Add files in the NEW backup array to the skip_remove array
* so this removal operation doesn't kill them */
/* old package backup list */
alpm_list_t *filelist = alpm_pkg_get_files(newpkg);
for(b = alpm_pkg_get_backup(newpkg); b; b = b->next) {
char *backup = _alpm_backup_file(b->data);
/* safety check (fix the upgrade026 pactest) */
if(!alpm_list_find_str(filelist, backup)) {
FREE(backup);
continue;
}
_alpm_log(PM_LOG_DEBUG, "adding %s to the skip_remove array\n", backup);
skip_remove = alpm_list_add(skip_remove, backup);
}
for(lp = files; lp; lp = lp->next) {
if(!can_remove_file(lp->data, skip_remove)) {
_alpm_log(PM_LOG_DEBUG, "not removing package '%s', can't remove all files\n",
pkgname);
RET_ERR(PM_ERR_PKG_CANT_REMOVE, -1);
}
}
/* iterate through the list backwards, unlinking files */
newfiles = alpm_list_reverse(files);
for(lp = newfiles; lp; lp = alpm_list_next(lp)) {
unlink_file(oldpkg, lp->data, skip_remove, 0);
}
alpm_list_free(newfiles);
FREELIST(skip_remove);
db:
/* remove the package from the database */
_alpm_log(PM_LOG_DEBUG, "updating database\n");
_alpm_log(PM_LOG_DEBUG, "removing database entry '%s'\n", pkgname);
if(_alpm_local_db_remove(handle->db_local, oldpkg) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not remove database entry %s-%s\n"),
pkgname, alpm_pkg_get_version(oldpkg));
}
/* remove the package from the cache */
if(_alpm_db_remove_pkgfromcache(handle->db_local, oldpkg) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not remove entry '%s' from cache\n"),
pkgname);
}
return(0);
}
int _alpm_remove_packages(pmtrans_t *trans, pmdb_t *db)
{
pmpkg_t *info;
alpm_list_t *targ, *lp;
int pkg_count;
ALPM_LOG_FUNC;
ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
pkg_count = alpm_list_count(trans->remove);
for(targ = trans->remove; targ; targ = targ->next) {
int position = 0;
char scriptlet[PATH_MAX];
info = (pmpkg_t*)targ->data;
const char *pkgname = NULL;
int targcount = alpm_list_count(targ);
if(handle->trans->state == STATE_INTERRUPTED) {
return(0);
}
/* get the name now so we can use it after package is removed */
pkgname = alpm_pkg_get_name(info);
snprintf(scriptlet, PATH_MAX, "%s%s-%s/install",
_alpm_db_path(db), pkgname, alpm_pkg_get_version(info));
EVENT(trans, PM_TRANS_EVT_REMOVE_START, info, NULL);
_alpm_log(PM_LOG_DEBUG, "removing package %s-%s\n",
pkgname, alpm_pkg_get_version(info));
/* run the pre-remove scriptlet if it exists */
if(alpm_pkg_has_scriptlet(info) && !(trans->flags & PM_TRANS_FLAG_NOSCRIPTLET)) {
_alpm_runscriptlet(handle->root, scriptlet, "pre_remove",
alpm_pkg_get_version(info), NULL, trans);
}
if(!(trans->flags & PM_TRANS_FLAG_DBONLY)) {
alpm_list_t *files = alpm_pkg_get_files(info);
for(lp = files; lp; lp = lp->next) {
if(!can_remove_file(lp->data, NULL)) {
_alpm_log(PM_LOG_DEBUG, "not removing package '%s', can't remove all files\n",
pkgname);
RET_ERR(PM_ERR_PKG_CANT_REMOVE, -1);
}
}
int filenum = alpm_list_count(files);
alpm_list_t *newfiles;
_alpm_log(PM_LOG_DEBUG, "removing %d files\n", filenum);
/* init progress bar */
PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, info->name, 0,
pkg_count, (pkg_count - targcount + 1));
/* iterate through the list backwards, unlinking files */
newfiles = alpm_list_reverse(files);
for(lp = newfiles; lp; lp = alpm_list_next(lp)) {
double percent;
unlink_file(info, lp->data, NULL, trans->flags & PM_TRANS_FLAG_NOSAVE);
/* update progress bar after each file */
percent = (double)position / (double)filenum;
PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, info->name,
(double)(percent * 100), pkg_count,
(pkg_count - targcount + 1));
position++;
}
alpm_list_free(newfiles);
}
/* set progress to 100% after we finish unlinking files */
PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, pkgname, 100,
pkg_count, (pkg_count - targcount + 1));
/* run the post-remove script if it exists */
if(alpm_pkg_has_scriptlet(info) && !(trans->flags & PM_TRANS_FLAG_NOSCRIPTLET)) {
_alpm_runscriptlet(handle->root, scriptlet, "post_remove",
alpm_pkg_get_version(info), NULL, trans);
}
/* remove the package from the database */
_alpm_log(PM_LOG_DEBUG, "updating database\n");
_alpm_log(PM_LOG_DEBUG, "removing database entry '%s'\n", pkgname);
if(_alpm_local_db_remove(db, info) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not remove database entry %s-%s\n"),
pkgname, alpm_pkg_get_version(info));
}
/* remove the package from the cache */
if(_alpm_db_remove_pkgfromcache(db, info) == -1) {
_alpm_log(PM_LOG_ERROR, _("could not remove entry '%s' from cache\n"),
pkgname);
}
EVENT(trans, PM_TRANS_EVT_REMOVE_DONE, info, NULL);
}
/* run ldconfig if it exists */
_alpm_ldconfig(handle->root);
return(0);
}
/* vim: set ts=2 sw=2 noet: */
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