/* * remove.c * * 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, 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> #if defined(__APPLE__) || defined(__OpenBSD__) #include <sys/syslimits.h> #endif #if defined(__APPLE__) || defined(__OpenBSD__) || defined(__sun__) #include <sys/stat.h> #endif #include <unistd.h> #include <errno.h> /* libalpm */ #include "remove.h" #include "alpm_list.h" #include "trans.h" #include "util.h" #include "error.h" #include "versioncmp.h" #include "md5.h" #include "sha1.h" #include "log.h" #include "backup.h" #include "package.h" #include "db.h" #include "cache.h" #include "deps.h" #include "provide.h" #include "handle.h" #include "alpm.h" int _alpm_remove_loadtarget(pmtrans_t *trans, pmdb_t *db, char *name) { pmpkg_t *info; ALPM_LOG_FUNC; 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_find(name, trans->packages)) { RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1); } if((info = _alpm_db_scan(db, name)) == NULL) { /* Unimportant - just ignore it if we can't find it */ _alpm_log(PM_LOG_DEBUG, _("could not find %s in database"), name); RET_ERR(PM_ERR_PKG_NOT_FOUND, -1); } /* ignore holdpkgs on upgrade */ if((trans == handle->trans) && alpm_list_find_str(handle->holdpkg, info->name)) { int resp = 0; QUESTION(trans, PM_TRANS_CONV_REMOVE_HOLDPKG, info, NULL, NULL, &resp); if(!resp) { RET_ERR(PM_ERR_PKG_HOLD, -1); } } _alpm_log(PM_LOG_DEBUG, _("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, 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_NODEPS)) && (trans->type != PM_TRANS_TYPE_UPGRADE)) { EVENT(trans, PM_TRANS_EVT_CHECKDEPS_START, NULL, NULL); _alpm_log(PM_LOG_DEBUG, _("looking for unsatisfied dependencies")); lp = _alpm_checkdeps(db, trans->type, trans->packages); if(lp != NULL) { if(trans->flags & PM_TRANS_FLAG_CASCADE) { 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_scan(db, miss->target); if(info) { _alpm_log(PM_LOG_DEBUG, _("pulling %s in the targets list"), alpm_pkg_get_name(info)); 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_DEBUG, _("finding removable dependencies")); trans->packages = _alpm_removedeps(db, trans->packages); } /* re-order w.r.t. dependencies */ _alpm_log(PM_LOG_DEBUG, _("sorting by dependencies")); lp = _alpm_sortbydeps(trans->packages, PM_TRANS_TYPE_REMOVE); /* free the old alltargs */ alpm_list_free(trans->packages); trans->packages = lp; EVENT(trans, PM_TRANS_EVT_CHECKDEPS_DONE, NULL, NULL); } return(0); } static int can_remove_file(pmtrans_t *trans, const char *path) { char file[PATH_MAX+1]; snprintf(file, PATH_MAX, "%s%s", handle->root, path); if(alpm_list_find_str(trans->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 && 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"), file, strerror(errno)); return(0); } } return(1); } /* Helper function for iterating through a package's file and deleting them * Used by _alpm_remove_commit * * TODO the parameters are a bit out of control here. This function doesn't * need to report PROGRESS, do it in the parent function. */ static void unlink_file(pmpkg_t *info, alpm_list_t *lp, alpm_list_t *targ, pmtrans_t *trans, int filenum, int *position) { struct stat buf; int needbackup = 0; double percent = 0.0; char file[PATH_MAX+1]; ALPM_LOG_FUNC; if(*position != 0) { percent = (double)*position / filenum; } char *hash = _alpm_needbackup(lp->data, alpm_pkg_get_backup(info)); if(hash) { needbackup = 1; FREE(hash); } if(trans->type == PM_TRANS_TYPE_UPGRADE) { /* check noupgrade */ if(alpm_list_find_str(handle->noupgrade, lp->data)) { _alpm_log(PM_LOG_DEBUG, _("Skipping removal of '%s' due to NoUpgrade"), file); return; } } snprintf(file, PATH_MAX, "%s%s", handle->root, (char *)lp->data); if(lstat(file, &buf)) { _alpm_log(PM_LOG_DEBUG, _("file %s does not exist"), file); return; } if(S_ISDIR(buf.st_mode)) { if(rmdir(file)) { /* this is okay, other pakcages are probably using it (like /usr) */ _alpm_log(PM_LOG_DEBUG, _("keeping directory %s"), file); } else { _alpm_log(PM_LOG_DEBUG, _("removing directory %s"), file); } } else { /* check the remove skip list before removing the file. * see the big comment block in db_find_conflicts() for an * explanation. */ if(alpm_list_find_str(trans->skip_remove, file)) { _alpm_log(PM_LOG_DEBUG, _("%s is in trans->skip_remove, skipping removal"), file); return; } else if(needbackup) { /* if the file is flagged, back it up to .pacsave */ if(!(trans->type == PM_TRANS_TYPE_UPGRADE)) { /* if it was an upgrade, the file would be left alone because * pacman_add() would handle it */ if(!(trans->flags & PM_TRANS_FLAG_NOSAVE)) { char newpath[PATH_MAX]; snprintf(newpath, PATH_MAX, "%s.pacsave", file); rename(file, newpath); _alpm_log(PM_LOG_WARNING, _("%s saved as %s"), file, newpath); return; } else { _alpm_log(PM_LOG_DEBUG, _("transaction is set to NOSAVE, not backing up '%s'"), file); } } } _alpm_log(PM_LOG_DEBUG, _("unlinking %s"), file); int list_count = alpm_list_count(trans->packages); /* this way we don't have to call alpm_list_count twice during PROGRESS */ PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, info->name, (double)(percent * 100), list_count, (list_count - alpm_list_count(targ) + 1)); ++(*position); if(unlink(file) == -1) { _alpm_log(PM_LOG_ERROR, _("cannot remove file %s: %s"), lp->data, strerror(errno)); } } } int _alpm_remove_commit(pmtrans_t *trans, pmdb_t *db) { pmpkg_t *info, *infodup; alpm_list_t *targ, *lp; ALPM_LOG_FUNC; 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) { int position = 0; char scriptlet[PATH_MAX]; alpm_list_t *files; info = (pmpkg_t*)targ->data; const char *pkgname = NULL; if(handle->trans->state == STATE_INTERRUPTED) { break; } /* 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", db->path, pkgname, alpm_pkg_get_version(info)); if(trans->type != PM_TRANS_TYPE_UPGRADE) { EVENT(trans, PM_TRANS_EVT_REMOVE_START, info, NULL); _alpm_log(PM_LOG_DEBUG, _("removing package %s-%s"), 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); } } files = alpm_pkg_get_files(info); if(!(trans->flags & PM_TRANS_FLAG_DBONLY)) { for(lp = files; lp; lp = lp->next) { if(!can_remove_file(trans, lp->data)) { _alpm_log(PM_LOG_DEBUG, _("not removing package '%s', can't remove all files"), pkgname); RET_ERR(PM_ERR_PKG_CANT_REMOVE, -1); } } int filenum = alpm_list_count(files); _alpm_log(PM_LOG_DEBUG, _("removing %d files"), filenum); /* iterate through the list backwards, unlinking files */ for(lp = alpm_list_last(files); lp; lp = lp->prev) { unlink_file(info, lp, targ, trans, filenum, &position); } } /* set progress to 100% after we finish unlinking files */ PROGRESS(trans, PM_TRANS_PROGRESS_REMOVE_START, pkgname, 100, alpm_list_count(trans->packages), (alpm_list_count(trans->packages) - alpm_list_count(targ) +1)); if(trans->type != PM_TRANS_TYPE_UPGRADE) { /* 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); } } /* duplicate the package so we can remove the requiredby fields later */ infodup = _alpm_pkg_dup(info); /* remove the package from the database */ _alpm_log(PM_LOG_DEBUG, _("updating database")); _alpm_log(PM_LOG_DEBUG, _("removing database entry '%s'"), pkgname); if(_alpm_db_remove(db, info) == -1) { _alpm_log(PM_LOG_ERROR, _("could not remove database entry %s-%s"), 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"), pkgname); } /* update dependency packages' REQUIREDBY fields */ _alpm_trans_update_depends(trans, infodup); _alpm_pkg_free(infodup); /* call a done event if this isn't an upgrade */ 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) && (handle->trans->state != STATE_INTERRUPTED)) { _alpm_log(PM_LOG_DEBUG, _("running \"ldconfig -r %s\""), handle->root); _alpm_ldconfig(handle->root); } return(0); } /* vim: set ts=2 sw=2 noet: */