/* * remove.c * * Copyright (c) 2006-2011 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 <string.h> #include <limits.h> #include <unistd.h> #include <sys/stat.h> /* libalpm */ #include "remove.h" #include "alpm_list.h" #include "alpm.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" int SYMEXPORT alpm_remove_pkg(pmhandle_t *handle, pmpkg_t *pkg) { const char *pkgname; pmtrans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); ASSERT(pkg != NULL, RET_ERR(handle, PM_ERR_WRONG_ARGS, -1)); ASSERT(handle == pkg->handle, RET_ERR(handle, PM_ERR_WRONG_ARGS, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(handle, PM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(handle, PM_ERR_TRANS_NOT_INITIALIZED, -1)); pkgname = pkg->name; if(_alpm_pkg_find(trans->remove, pkgname)) { RET_ERR(handle, PM_ERR_TRANS_DUP_TARGET, -1); } _alpm_log(handle, PM_LOG_DEBUG, "adding package %s to the transaction remove list\n", pkgname); trans->remove = alpm_list_add(trans->remove, _alpm_pkg_dup(pkg)); return 0; } static void remove_prepare_cascade(pmhandle_t *handle, alpm_list_t *lp) { pmtrans_t *trans = handle->trans; 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(handle->db_local, miss->target); if(info) { if(!_alpm_pkg_find(trans->remove, alpm_pkg_get_name(info))) { _alpm_log(handle, 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(handle, 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(handle, _alpm_db_get_pkgcache(handle->db_local), trans->remove, NULL, 1); } } static void remove_prepare_keep_needed(pmhandle_t *handle, alpm_list_t *lp) { pmtrans_t *trans = handle->trans; /* 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(handle, 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(handle, _alpm_db_get_pkgcache(handle->db_local), trans->remove, NULL, 1); } } /** Transaction preparation for remove actions. * This functions takes a pointer to a alpm_list_t which will be * filled with a list of pmdepmissing_t* objects representing * the packages blocking the transaction. * @param handle the context handle * @param data a pointer to an alpm_list_t* to fill */ int _alpm_remove_prepare(pmhandle_t *handle, alpm_list_t **data) { alpm_list_t *lp; pmtrans_t *trans = handle->trans; pmdb_t *db = handle->db_local; if((trans->flags & PM_TRANS_FLAG_RECURSE) && !(trans->flags & PM_TRANS_FLAG_CASCADE)) { _alpm_log(handle, 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(handle, PM_LOG_DEBUG, "looking for unsatisfied dependencies\n"); lp = alpm_checkdeps(handle, _alpm_db_get_pkgcache(db), trans->remove, NULL, 1); if(lp != NULL) { if(trans->flags & PM_TRANS_FLAG_CASCADE) { remove_prepare_cascade(handle, lp); } else if(trans->flags & PM_TRANS_FLAG_UNNEEDED) { /* Remove needed packages (which would break dependencies) * from target list */ remove_prepare_keep_needed(handle, 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(handle, PM_ERR_UNSATISFIED_DEPS, -1); } } } /* re-order w.r.t. dependencies */ _alpm_log(handle, PM_LOG_DEBUG, "sorting by dependencies\n"); lp = _alpm_sortbydeps(handle, 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(handle, 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(pmhandle_t *handle, const char *path, alpm_list_t *skip_remove) { char file[PATH_MAX]; snprintf(file, PATH_MAX, "%s%s", handle->root, path); if(alpm_list_find_str(skip_remove, 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(handle, 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(pmhandle_t *handle, pmpkg_t *info, const char *filename, alpm_list_t *skip_remove, int nosave) { struct stat buf; char file[PATH_MAX]; 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(handle, 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(handle, 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(handle, PM_LOG_DEBUG, "keeping directory %s\n", file); } else { _alpm_log(handle, 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(handle, 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 = filehash ? strcmp(filehash, pkghash) : 0; FREE(filehash); FREE(pkghash); if(cmp != 0) { char newpath[PATH_MAX]; snprintf(newpath, PATH_MAX, "%s.pacsave", file); rename(file, newpath); _alpm_log(handle, PM_LOG_WARNING, _("%s saved as %s\n"), file, newpath); alpm_logaction(handle, "warning: %s saved as %s\n", file, newpath); return; } } } _alpm_log(handle, PM_LOG_DEBUG, "unlinking %s\n", file); if(unlink(file) == -1) { _alpm_log(handle, PM_LOG_ERROR, _("cannot remove file '%s': %s\n"), filename, strerror(errno)); } } } int _alpm_upgraderemove_package(pmhandle_t *handle, pmpkg_t *oldpkg, pmpkg_t *newpkg) { alpm_list_t *skip_remove, *b; alpm_list_t *newfiles, *lp; size_t filenum; alpm_list_t *files = alpm_pkg_get_files(oldpkg); const char *pkgname = alpm_pkg_get_name(oldpkg); _alpm_log(handle, PM_LOG_DEBUG, "removing old package first (%s-%s)\n", oldpkg->name, oldpkg->version); if(handle->trans->flags & PM_TRANS_FLAG_DBONLY) { goto db; } /* copy the remove skiplist over */ skip_remove = alpm_list_join( alpm_list_strdup(handle->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(handle, 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(handle, lp->data, skip_remove)) { _alpm_log(handle, PM_LOG_DEBUG, "not removing package '%s', can't remove all files\n", pkgname); RET_ERR(handle, PM_ERR_PKG_CANT_REMOVE, -1); } } filenum = alpm_list_count(files); _alpm_log(handle, PM_LOG_DEBUG, "removing %ld files\n", (unsigned long)filenum); /* iterate through the list backwards, unlinking files */ newfiles = alpm_list_reverse(files); for(lp = newfiles; lp; lp = alpm_list_next(lp)) { unlink_file(handle, oldpkg, lp->data, skip_remove, 0); } alpm_list_free(newfiles); FREELIST(skip_remove); db: /* remove the package from the database */ _alpm_log(handle, PM_LOG_DEBUG, "updating database\n"); _alpm_log(handle, PM_LOG_DEBUG, "removing database entry '%s'\n", pkgname); if(_alpm_local_db_remove(handle->db_local, oldpkg) == -1) { _alpm_log(handle, 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(handle, PM_LOG_ERROR, _("could not remove entry '%s' from cache\n"), pkgname); } return 0; } int _alpm_remove_packages(pmhandle_t *handle) { pmpkg_t *info; alpm_list_t *targ, *lp; size_t pkg_count; pmtrans_t *trans = handle->trans; 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; size_t targcount = alpm_list_count(targ); if(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(handle->db_local), pkgname, alpm_pkg_get_version(info)); EVENT(trans, PM_TRANS_EVT_REMOVE_START, info, NULL); _alpm_log(handle, 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, scriptlet, "pre_remove", alpm_pkg_get_version(info), NULL); } if(!(trans->flags & PM_TRANS_FLAG_DBONLY)) { alpm_list_t *files = alpm_pkg_get_files(info); alpm_list_t *newfiles; size_t filenum; for(lp = files; lp; lp = lp->next) { if(!can_remove_file(handle, lp->data, NULL)) { _alpm_log(handle, PM_LOG_DEBUG, "not removing package '%s', can't remove all files\n", pkgname); RET_ERR(handle, PM_ERR_PKG_CANT_REMOVE, -1); } } filenum = alpm_list_count(files); _alpm_log(handle, PM_LOG_DEBUG, "removing %ld files\n", (unsigned long)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)) { int percent; unlink_file(handle, info, lp->data, NULL, trans->flags & PM_TRANS_FLAG_NOSAVE); /* update progress bar after each file */ percent = (position * 100) / filenum; PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, info->name, percent, 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, scriptlet, "post_remove", alpm_pkg_get_version(info), NULL); } /* remove the package from the database */ _alpm_log(handle, PM_LOG_DEBUG, "updating database\n"); _alpm_log(handle, PM_LOG_DEBUG, "removing database entry '%s'\n", pkgname); if(_alpm_local_db_remove(handle->db_local, info) == -1) { _alpm_log(handle, 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(handle->db_local, info) == -1) { _alpm_log(handle, 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); return 0; } /* vim: set ts=2 sw=2 noet: */