/* * trans.c * * Copyright (c) 2006-2012 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 <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <errno.h> #include <limits.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 * @{ */ /** Initialize the transaction. */ int SYMEXPORT alpm_trans_init(alpm_handle_t *handle, alpm_transflag_t flags) { alpm_trans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); ASSERT(handle->trans == NULL, RET_ERR(handle, ALPM_ERR_TRANS_NOT_NULL, -1)); /* lock db */ if(!(flags & ALPM_TRANS_FLAG_NOLOCK)) { if(_alpm_handle_lock(handle)) { RET_ERR(handle, ALPM_ERR_HANDLE_LOCK, -1); } } CALLOC(trans, 1, sizeof(alpm_trans_t), RET_ERR(handle, ALPM_ERR_MEMORY, -1)); trans->flags = flags; trans->state = STATE_INITIALIZED; handle->trans = trans; return 0; } static alpm_list_t *check_arch(alpm_handle_t *handle, alpm_list_t *pkgs) { alpm_list_t *i; alpm_list_t *invalid = NULL; const char *arch = handle->arch; if(!arch) { return NULL; } for(i = pkgs; i; i = i->next) { alpm_pkg_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 = pkg->name; const char *pkgver = pkg->version; size_t len = strlen(pkgname) + strlen(pkgver) + strlen(pkgarch) + 3; MALLOC(string, len, RET_ERR(handle, ALPM_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_handle_t *handle, alpm_list_t **data) { alpm_trans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); ASSERT(data != NULL, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, -1)); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(handle, ALPM_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(handle, trans->add); if(invalid) { if(data) { *data = invalid; } RET_ERR(handle, ALPM_ERR_PKG_INVALID_ARCH, -1); } if(trans->add == NULL) { if(_alpm_remove_prepare(handle, data) == -1) { /* pm_errno is set by _alpm_remove_prepare() */ return -1; } } else { if(_alpm_sync_prepare(handle, 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_handle_t *handle, alpm_list_t **data) { alpm_trans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_PREPARED, RET_ERR(handle, ALPM_ERR_TRANS_NOT_PREPARED, -1)); ASSERT(!(trans->flags & ALPM_TRANS_FLAG_NOLOCK), RET_ERR(handle, ALPM_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(handle, 1) == -1) { /* pm_errno is set by _alpm_remove_commit() */ return -1; } } else { if(_alpm_sync_commit(handle, 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(alpm_handle_t *handle) { alpm_trans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); ASSERT(trans->state == STATE_COMMITING || trans->state == STATE_INTERRUPTED, RET_ERR(handle, ALPM_ERR_TRANS_TYPE, -1)); trans->state = STATE_INTERRUPTED; return 0; } /** Release a transaction. */ int SYMEXPORT alpm_trans_release(alpm_handle_t *handle) { alpm_trans_t *trans; /* Sanity checks */ CHECK_HANDLE(handle, return -1); trans = handle->trans; ASSERT(trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); ASSERT(trans->state != STATE_IDLE, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); int nolock_flag = trans->flags & ALPM_TRANS_FLAG_NOLOCK; _alpm_trans_free(trans); handle->trans = NULL; /* unlock db */ if(!nolock_flag) { if(_alpm_handle_unlock(handle)) { _alpm_log(handle, ALPM_LOG_WARNING, _("could not remove lock file %s\n"), handle->lockfile); alpm_logaction(handle, "warning: could not remove lock file %s\n", handle->lockfile); } } return 0; } /** @} */ void _alpm_trans_free(alpm_trans_t *trans) { if(trans == NULL) { return; } alpm_list_free_inner(trans->unresolvable, (alpm_list_fn_free)_alpm_pkg_free_trans); alpm_list_free(trans->unresolvable); 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(alpm_handle_t *handle, const char *filepath, const char *script, const char *ver, const char *oldver, int is_archive) { char arg0[64], arg1[3], cmdline[PATH_MAX]; char *argv[] = { arg0, arg1, cmdline, NULL }; char *tmpdir, *scriptfn = NULL, *scriptpath; int retval = 0; size_t len; if(_alpm_access(handle, NULL, filepath, R_OK) != 0) { _alpm_log(handle, ALPM_LOG_DEBUG, "scriptlet '%s' not found\n", filepath); return 0; } if(!is_archive && !grep(filepath, script)) { /* script not found in scriptlet file; we can only short-circuit this early * if it is an actual scriptlet file and not an archive. */ return 0; } strcpy(arg0, SCRIPTLET_SHELL); strcpy(arg1, "-c"); /* create a directory in $root/tmp/ for copying/extracting the scriptlet */ len = strlen(handle->root) + strlen("tmp/alpm_XXXXXX") + 1; MALLOC(tmpdir, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1)); snprintf(tmpdir, len, "%stmp/", handle->root); if(access(tmpdir, F_OK) != 0) { _alpm_makepath_mode(tmpdir, 01777); } snprintf(tmpdir, len, "%stmp/alpm_XXXXXX", handle->root); if(mkdtemp(tmpdir) == NULL) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not create temp directory\n")); free(tmpdir); return 1; } /* either extract or copy the scriptlet */ len += strlen("/.INSTALL"); MALLOC(scriptfn, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1)); snprintf(scriptfn, len, "%s/.INSTALL", tmpdir); if(is_archive) { if(_alpm_unpack_single(handle, filepath, tmpdir, ".INSTALL")) { retval = 1; } } else { if(_alpm_copyfile(filepath, scriptfn)) { _alpm_log(handle, ALPM_LOG_ERROR, _("could not copy tempfile to %s (%s)\n"), scriptfn, strerror(errno)); retval = 1; } } if(retval == 1) { goto cleanup; } if(is_archive && !grep(scriptfn, script)) { /* script not found in extracted scriptlet file */ goto cleanup; } /* chop off the root so we can find the tmpdir in the chroot */ scriptpath = scriptfn + strlen(handle->root) - 1; 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(handle, ALPM_LOG_DEBUG, "executing \"%s\"\n", cmdline); retval = _alpm_run_chroot(handle, SCRIPTLET_SHELL, argv); cleanup: if(scriptfn && unlink(scriptfn)) { _alpm_log(handle, ALPM_LOG_WARNING, _("could not remove %s\n"), scriptfn); } if(rmdir(tmpdir)) { _alpm_log(handle, ALPM_LOG_WARNING, _("could not remove tmpdir %s\n"), tmpdir); } free(scriptfn); free(tmpdir); return retval; } alpm_transflag_t SYMEXPORT alpm_trans_get_flags(alpm_handle_t *handle) { /* Sanity checks */ CHECK_HANDLE(handle, return -1); ASSERT(handle->trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, -1)); return handle->trans->flags; } alpm_list_t SYMEXPORT *alpm_trans_get_add(alpm_handle_t *handle) { /* Sanity checks */ CHECK_HANDLE(handle, return NULL); ASSERT(handle->trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, NULL)); return handle->trans->add; } alpm_list_t SYMEXPORT *alpm_trans_get_remove(alpm_handle_t *handle) { /* Sanity checks */ CHECK_HANDLE(handle, return NULL); ASSERT(handle->trans != NULL, RET_ERR(handle, ALPM_ERR_TRANS_NULL, NULL)); return handle->trans->remove; } /* vim: set ts=2 sw=2 noet: */