/* * trans.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) 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 <stdio.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <errno.h> #include <limits.h> #include <fcntl.h> /* libalpm */ #include "trans.h" #include "alpm_list.h" #include "package.h" #include "util.h" #include "log.h" #include "handle.h" #include "remove.h" #include "sync.h" #include "alpm.h" /** \addtogroup alpm_trans Transaction Functions * @brief Functions to manipulate libalpm transactions * @{ */ /* Create a lock file */ static int make_lock(pmhandle_t *handle) { int fd; char *dir, *ptr; ASSERT(handle->lockfile != NULL, return -1); /* create the dir of the lockfile first */ dir = strdup(handle->lockfile); ptr = strrchr(dir, '/'); if(ptr) { *ptr = '\0'; } if(_alpm_makepath(dir)) { FREE(dir); return -1; } FREE(dir); do { fd = open(handle->lockfile, O_WRONLY | O_CREAT | O_EXCL, 0000); } while(fd == -1 && errno == EINTR); if(fd > 0) { FILE *f = fdopen(fd, "w"); fprintf(f, "%ld\n", (long)getpid()); fflush(f); fsync(fd); handle->lckstream = f; return 0; } return -1; } /* Remove a lock file */ static int remove_lock(pmhandle_t *handle) { if(handle->lckstream != NULL) { fclose(handle->lckstream); handle->lckstream = NULL; } if(unlink(handle->lockfile) == -1 && errno != ENOENT) { return -1; } return 0; } /** Initialize the transaction. */ int SYMEXPORT alpm_trans_init(pmtransflag_t flags, alpm_trans_cb_event event, alpm_trans_cb_conv conv, alpm_trans_cb_progress progress) { pmtrans_t *trans; const int required_db_version = 2; int db_version; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1)); /* lock db */ if(!(flags & PM_TRANS_FLAG_NOLOCK)) { if(make_lock(handle)) { RET_ERR(PM_ERR_HANDLE_LOCK, -1); } } trans = _alpm_trans_new(); if(trans == NULL) { RET_ERR(PM_ERR_MEMORY, -1); } trans->flags = flags; trans->cb_event = event; trans->cb_conv = conv; trans->cb_progress = progress; trans->state = STATE_INITIALIZED; handle->trans = trans; /* check database version */ db_version = _alpm_db_version(handle->db_local); if(db_version < required_db_version) { _alpm_log(PM_LOG_ERROR, _("%s database version is too old\n"), handle->db_local->treename); remove_lock(handle); _alpm_trans_free(trans); RET_ERR(PM_ERR_DB_VERSION, -1); } return 0; } static alpm_list_t *check_arch(alpm_list_t *pkgs) { alpm_list_t *i; alpm_list_t *invalid = NULL; const char *arch = alpm_option_get_arch(); if(!arch) { return NULL; } for(i = pkgs; i; i = i->next) { pmpkg_t *pkg = i->data; const char *pkgarch = alpm_pkg_get_arch(pkg); if(pkgarch && strcmp(pkgarch, arch) && strcmp(pkgarch, "any")) { char *string; const char *pkgname = alpm_pkg_get_name(pkg); const char *pkgver = alpm_pkg_get_version(pkg); size_t len = strlen(pkgname) + strlen(pkgver) + strlen(pkgarch) + 3; MALLOC(string, len, RET_ERR(PM_ERR_MEMORY, invalid)); sprintf(string, "%s-%s-%s", pkgname, pkgver, pkgarch); invalid = alpm_list_add(invalid, string); } } return invalid; } /** Prepare a transaction. */ int SYMEXPORT alpm_trans_prepare(alpm_list_t **data) { pmtrans_t *trans; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(data != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1)); /* If there's nothing to do, return without complaining */ if(trans->add == NULL && trans->remove == NULL) { return 0; } alpm_list_t *invalid = check_arch(trans->add); if(invalid) { if(data) { *data = invalid; } RET_ERR(PM_ERR_PKG_INVALID_ARCH, -1); } if(trans->add == NULL) { if(_alpm_remove_prepare(trans, handle->db_local, data) == -1) { /* pm_errno is set by _alpm_remove_prepare() */ return -1; } } else { if(_alpm_sync_prepare(trans, handle->db_local, handle->dbs_sync, data) == -1) { /* pm_errno is set by _alpm_sync_prepare() */ return -1; } } trans->state = STATE_PREPARED; return 0; } /** Commit a transaction. */ int SYMEXPORT alpm_trans_commit(alpm_list_t **data) { pmtrans_t *trans; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_PREPARED, RET_ERR(PM_ERR_TRANS_NOT_PREPARED, -1)); ASSERT(!(trans->flags & PM_TRANS_FLAG_NOLOCK), RET_ERR(PM_ERR_TRANS_NOT_LOCKED, -1)); /* If there's nothing to do, return without complaining */ if(trans->add == NULL && trans->remove == NULL) { return 0; } trans->state = STATE_COMMITING; if(trans->add == NULL) { if(_alpm_remove_packages(trans, handle->db_local) == -1) { /* pm_errno is set by _alpm_remove_commit() */ return -1; } } else { if(_alpm_sync_commit(trans, handle->db_local, data) == -1) { /* pm_errno is set by _alpm_sync_commit() */ return -1; } } trans->state = STATE_COMMITED; return 0; } /** Interrupt a transaction. */ int SYMEXPORT alpm_trans_interrupt(void) { pmtrans_t *trans; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_COMMITING || trans->state == STATE_INTERRUPTED, RET_ERR(PM_ERR_TRANS_TYPE, -1)); trans->state = STATE_INTERRUPTED; return 0; } /** Release a transaction. */ int SYMEXPORT alpm_trans_release(void) { pmtrans_t *trans; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(trans->state != STATE_IDLE, RET_ERR(PM_ERR_TRANS_NULL, -1)); int nolock_flag = trans->flags & PM_TRANS_FLAG_NOLOCK; _alpm_trans_free(trans); handle->trans = NULL; /* unlock db */ if(!nolock_flag) { if(remove_lock(handle)) { _alpm_log(PM_LOG_WARNING, _("could not remove lock file %s\n"), alpm_option_get_lockfile()); alpm_logaction("warning: could not remove lock file %s\n", alpm_option_get_lockfile()); } } return 0; } /** @} */ pmtrans_t *_alpm_trans_new(void) { pmtrans_t *trans; ALPM_LOG_FUNC; CALLOC(trans, 1, sizeof(pmtrans_t), RET_ERR(PM_ERR_MEMORY, NULL)); trans->state = STATE_IDLE; return trans; } void _alpm_trans_free(pmtrans_t *trans) { ALPM_LOG_FUNC; if(trans == NULL) { return; } alpm_list_free_inner(trans->add, (alpm_list_fn_free)_alpm_pkg_free_trans); alpm_list_free(trans->add); alpm_list_free_inner(trans->remove, (alpm_list_fn_free)_alpm_pkg_free); alpm_list_free(trans->remove); FREELIST(trans->skip_remove); FREE(trans); } /* A cheap grep for text files, returns 1 if a substring * was found in the text file fn, 0 if it wasn't */ static int grep(const char *fn, const char *needle) { FILE *fp; if((fp = fopen(fn, "r")) == NULL) { return 0; } while(!feof(fp)) { char line[1024]; if(fgets(line, sizeof(line), fp) == NULL) { continue; } /* TODO: this will not work if the search string * ends up being split across line reads */ if(strstr(line, needle)) { fclose(fp); return 1; } } fclose(fp); return 0; } int _alpm_runscriptlet(const char *root, const char *installfn, const char *script, const char *ver, const char *oldver, pmtrans_t UNUSED *trans) { char scriptfn[PATH_MAX]; char cmdline[PATH_MAX]; char tmpdir[PATH_MAX]; char *argv[] = { "sh", "-c", cmdline, NULL }; char *scriptpath; int clean_tmpdir = 0; int retval = 0; ALPM_LOG_FUNC; if(access(installfn, R_OK)) { /* not found */ _alpm_log(PM_LOG_DEBUG, "scriptlet '%s' not found\n", installfn); return 0; } /* creates a directory in $root/tmp/ for copying/extracting the scriptlet */ snprintf(tmpdir, PATH_MAX, "%stmp/", root); if(access(tmpdir, F_OK) != 0) { _alpm_makepath_mode(tmpdir, 01777); } snprintf(tmpdir, PATH_MAX, "%stmp/alpm_XXXXXX", root); if(mkdtemp(tmpdir) == NULL) { _alpm_log(PM_LOG_ERROR, _("could not create temp directory\n")); return 1; } else { clean_tmpdir = 1; } /* either extract or copy the scriptlet */ snprintf(scriptfn, PATH_MAX, "%s/.INSTALL", tmpdir); if(strcmp(script, "pre_upgrade") == 0 || strcmp(script, "pre_install") == 0) { if(_alpm_unpack_single(installfn, tmpdir, ".INSTALL")) { retval = 1; } } else { if(_alpm_copyfile(installfn, scriptfn)) { _alpm_log(PM_LOG_ERROR, _("could not copy tempfile to %s (%s)\n"), scriptfn, strerror(errno)); retval = 1; } } if(retval == 1) { goto cleanup; } /* chop off the root so we can find the tmpdir in the chroot */ scriptpath = scriptfn + strlen(root) - 1; if(!grep(scriptfn, script)) { /* script not found in scriptlet file */ goto cleanup; } if(oldver) { snprintf(cmdline, PATH_MAX, ". %s; %s %s %s", scriptpath, script, ver, oldver); } else { snprintf(cmdline, PATH_MAX, ". %s; %s %s", scriptpath, script, ver); } _alpm_log(PM_LOG_DEBUG, "executing \"%s\"\n", cmdline); retval = _alpm_run_chroot(root, "/bin/sh", argv); cleanup: if(clean_tmpdir && _alpm_rmrf(tmpdir)) { _alpm_log(PM_LOG_WARNING, _("could not remove tmpdir %s\n"), tmpdir); } return retval; } int SYMEXPORT alpm_trans_get_flags() { /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); return handle->trans->flags; } alpm_list_t SYMEXPORT * alpm_trans_get_add() { /* Sanity checks */ ASSERT(handle != NULL, return NULL); ASSERT(handle->trans != NULL, return NULL); return handle->trans->add; } alpm_list_t SYMEXPORT * alpm_trans_get_remove() { /* Sanity checks */ ASSERT(handle != NULL, return NULL); ASSERT(handle->trans != NULL, return NULL); return handle->trans->remove; } /* vim: set ts=2 sw=2 noet: */