/* * trans.c * * Copyright (c) 2002-2007 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/wait.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/statvfs.h> #include <errno.h> /* libalpm */ #include "trans.h" #include "alpm_list.h" #include "package.h" #include "util.h" #include "log.h" #include "handle.h" #include "add.h" #include "remove.h" #include "sync.h" #include "alpm.h" #include "deps.h" #include "cache.h" /** \addtogroup alpm_trans Transaction Functions * @brief Functions to manipulate libalpm transactions * @{ */ /** Initialize the transaction. * @param type type of the transaction * @param flags flags of the transaction (like nodeps, etc) * @param event event callback function pointer * @param conv question callback function pointer * @param progress progress callback function pointer * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_init(pmtranstype_t type, pmtransflag_t flags, alpm_trans_cb_event event, alpm_trans_cb_conv conv, alpm_trans_cb_progress progress) { 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)) { handle->lckfd = _alpm_lckmk(); if(handle->lckfd == -1) { RET_ERR(PM_ERR_HANDLE_LOCK, -1); } } handle->trans = _alpm_trans_new(); if(handle->trans == NULL) { RET_ERR(PM_ERR_MEMORY, -1); } return(_alpm_trans_init(handle->trans, type, flags, event, conv, progress)); } /** Search for packages to upgrade and add them to the transaction. * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_sysupgrade() { pmtrans_t *trans; ALPM_LOG_FUNC; 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_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1)); ASSERT(trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_TRANS_TYPE, -1)); return(_alpm_sync_sysupgrade(trans, handle->db_local, handle->dbs_sync)); } /** Add a target to the transaction. * @param target the name of the target to add * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_addtarget(char *target) { pmtrans_t *trans; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(target != NULL && strlen(target) != 0, 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)); return(_alpm_trans_addtarget(trans, target)); } /** Prepare a transaction. * @param data the address of an alpm_list where detailed description * of an error can be dumped (ie. list of conflicting files) * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_prepare(alpm_list_t **data) { 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)); ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(handle->trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1)); return(_alpm_trans_prepare(handle->trans, data)); } /** Commit a transaction. * @param data the address of an alpm_list where detailed description * of an error can be dumped (ie. list of conflicting files) * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_commit(alpm_list_t **data) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(handle->trans->state == STATE_PREPARED, RET_ERR(PM_ERR_TRANS_NOT_PREPARED, -1)); ASSERT(!(handle->trans->flags & PM_TRANS_FLAG_NOLOCK), RET_ERR(PM_ERR_TRANS_NOT_LOCKED, -1)); return(_alpm_trans_commit(handle->trans, data)); } /** Interrupt a transaction. * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_interrupt() { 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. * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_trans_release() { 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)); unsigned int nolock_flag = trans->flags & PM_TRANS_FLAG_NOLOCK; _alpm_trans_free(trans); handle->trans = NULL; /* unlock db */ if(!nolock_flag) { if(handle->lckfd != -1) { while(close(handle->lckfd) == -1 && errno == EINTR); handle->lckfd = -1; } if(_alpm_lckrm()) { _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() { 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; } if(trans->type == PM_TRANS_TYPE_SYNC) { alpm_list_free_inner(trans->packages, (alpm_list_fn_free)_alpm_pkg_free_trans); } else { alpm_list_free_inner(trans->packages, (alpm_list_fn_free)_alpm_pkg_free); } alpm_list_free(trans->packages); FREELIST(trans->skip_add); FREELIST(trans->skip_remove); FREE(trans); } int _alpm_trans_init(pmtrans_t *trans, pmtranstype_t type, pmtransflag_t flags, alpm_trans_cb_event event, alpm_trans_cb_conv conv, alpm_trans_cb_progress progress) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); trans->type = type; trans->flags = flags; trans->cb_event = event; trans->cb_conv = conv; trans->cb_progress = progress; trans->state = STATE_INITIALIZED; return(0); } /** Add a target to the transaction. * @param trans the current transaction * @param target the name of the target to add * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int _alpm_trans_addtarget(pmtrans_t *trans, char *target) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(target != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1)); switch(trans->type) { case PM_TRANS_TYPE_UPGRADE: if(_alpm_add_loadtarget(trans, handle->db_local, target) == -1) { /* pm_errno is set by _alpm_add_loadtarget() */ return(-1); } break; case PM_TRANS_TYPE_REMOVE: case PM_TRANS_TYPE_REMOVEUPGRADE: if(_alpm_remove_loadtarget(trans, handle->db_local, target) == -1) { /* pm_errno is set by _alpm_remove_loadtarget() */ return(-1); } break; case PM_TRANS_TYPE_SYNC: if(_alpm_sync_addtarget(trans, handle->db_local, handle->dbs_sync, target) == -1) { /* pm_errno is set by _alpm_sync_loadtarget() */ return(-1); } break; } return(0); } int _alpm_trans_prepare(pmtrans_t *trans, alpm_list_t **data) { if(data) { *data = NULL; } ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); /* If there's nothing to do, return without complaining */ if(trans->packages == NULL) { return(0); } switch(trans->type) { case PM_TRANS_TYPE_UPGRADE: if(_alpm_add_prepare(trans, handle->db_local, data) == -1) { /* pm_errno is set by _alpm_add_prepare() */ return(-1); } break; case PM_TRANS_TYPE_REMOVE: case PM_TRANS_TYPE_REMOVEUPGRADE: if(_alpm_remove_prepare(trans, handle->db_local, data) == -1) { /* pm_errno is set by _alpm_remove_prepare() */ return(-1); } break; case PM_TRANS_TYPE_SYNC: if(_alpm_sync_prepare(trans, handle->db_local, handle->dbs_sync, data) == -1) { /* pm_errno is set by _alpm_sync_prepare() */ return(-1); } break; } trans->state = STATE_PREPARED; return(0); } int _alpm_trans_commit(pmtrans_t *trans, alpm_list_t **data) { ALPM_LOG_FUNC; if(data!=NULL) *data = NULL; /* Sanity checks */ ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); /* If there's nothing to do, return without complaining */ if(trans->packages == NULL) { return(0); } trans->state = STATE_COMMITING; switch(trans->type) { case PM_TRANS_TYPE_UPGRADE: if(_alpm_add_commit(trans, handle->db_local) == -1) { /* pm_errno is set by _alpm_add_commit() */ return(-1); } break; case PM_TRANS_TYPE_REMOVE: case PM_TRANS_TYPE_REMOVEUPGRADE: if(_alpm_remove_commit(trans, handle->db_local) == -1) { /* pm_errno is set by _alpm_remove_commit() */ return(-1); } break; case PM_TRANS_TYPE_SYNC: if(_alpm_sync_commit(trans, handle->db_local, data) == -1) { /* pm_errno is set by _alpm_sync_commit() */ return(-1); } break; } trans->state = STATE_COMMITED; return(0); } /* 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]; fgets(line, 1024, fp); if(feof(fp)) { continue; } 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 *trans) { char scriptfn[PATH_MAX]; char cmdline[PATH_MAX]; char tmpdir[PATH_MAX]; char cwd[PATH_MAX]; char *scriptpath; pid_t pid; int clean_tmpdir = 0; int restore_cwd = 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") || !strcmp(script, "pre_install")) { if(_alpm_unpack(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; } /* save the cwd so we can restore it later */ if(getcwd(cwd, PATH_MAX) == NULL) { _alpm_log(PM_LOG_ERROR, _("could not get current working directory\n")); } else { restore_cwd = 1; } /* just in case our cwd was removed in the upgrade operation */ if(chdir(root) != 0) { _alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)\n"), root, strerror(errno)); goto cleanup; } _alpm_log(PM_LOG_DEBUG, "executing %s script...\n", script); 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, "%s\n", cmdline); /* Flush open fds before fork() to avoid cloning buffers */ fflush(NULL); /* fork- parent and child each have seperate code blocks below */ pid = fork(); if(pid == -1) { _alpm_log(PM_LOG_ERROR, _("could not fork a new process (%s)\n"), strerror(errno)); retval = 1; goto cleanup; } if(pid == 0) { FILE *pipe; /* this code runs for the child only (the actual chroot/exec) */ _alpm_log(PM_LOG_DEBUG, "chrooting in %s\n", root); if(chroot(root) != 0) { _alpm_log(PM_LOG_ERROR, _("could not change the root directory (%s)\n"), strerror(errno)); exit(1); } if(chdir("/") != 0) { _alpm_log(PM_LOG_ERROR, _("could not change directory to / (%s)\n"), strerror(errno)); exit(1); } umask(0022); _alpm_log(PM_LOG_DEBUG, "executing \"%s\"\n", cmdline); /* execl("/bin/sh", "sh", "-c", cmdline, (char *)NULL); */ pipe = popen(cmdline, "r"); if(!pipe) { _alpm_log(PM_LOG_ERROR, _("call to popen failed (%s)"), strerror(errno)); exit(1); } while(!feof(pipe)) { char line[PATH_MAX]; if(fgets(line, PATH_MAX, pipe) == NULL) break; alpm_logaction("%s", line); EVENT(trans, PM_TRANS_EVT_SCRIPTLET_INFO, line, NULL); } retval = pclose(pipe); exit(WEXITSTATUS(retval)); } else { /* this code runs for the parent only (wait on the child) */ pid_t retpid; int status; while((retpid = waitpid(pid, &status, 0)) == -1 && errno == EINTR); if(retpid == -1) { _alpm_log(PM_LOG_ERROR, _("call to waitpid failed (%s)\n"), strerror(errno)); retval = 1; goto cleanup; } else { /* check the return status, make sure it is 0 (success) */ if(WIFEXITED(status)) { _alpm_log(PM_LOG_DEBUG, "call to waitpid succeeded\n"); if(WEXITSTATUS(status) != 0) { _alpm_log(PM_LOG_ERROR, _("scriptlet failed to execute correctly\n")); retval = 1; } } } } cleanup: if(clean_tmpdir && _alpm_rmrf(tmpdir)) { _alpm_log(PM_LOG_WARNING, _("could not remove tmpdir %s\n"), tmpdir); } if(restore_cwd) { chdir(cwd); } return(retval); } pmtranstype_t SYMEXPORT alpm_trans_get_type() { /* Sanity checks */ ASSERT(handle != NULL, return(-1)); ASSERT(handle->trans != NULL, return(-1)); return handle->trans->type; } unsigned int SYMEXPORT alpm_trans_get_flags() { /* Sanity checks */ ASSERT(handle != NULL, return(-1)); ASSERT(handle->trans != NULL, return(-1)); return handle->trans->flags; } alpm_list_t SYMEXPORT * alpm_trans_get_pkgs() { /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(handle->trans != NULL, return(NULL)); return handle->trans->packages; } /* vim: set ts=2 sw=2 noet: */