/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 Zbigniew Jędrzejewski-Szmek systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdlib.h> #include <getopt.h> #include "manager.h" #include "bus-util.h" #include "log.h" #include "strv.h" #include "build.h" #include "pager.h" #include "analyze-verify.h" static int generate_path(char **var, char **filenames) { char **filename; _cleanup_strv_free_ char **ans = NULL; int r; STRV_FOREACH(filename, filenames) { char *t; t = dirname_malloc(*filename); if (!t) return -ENOMEM; r = strv_consume(&ans, t); if (r < 0) return r; } assert_se(strv_uniq(ans)); r = strv_extend(&ans, ""); if (r < 0) return r; *var = strv_join(ans, ":"); if (!*var) return -ENOMEM; return 0; } static int verify_socket(Unit *u) { int r; assert(u); if (u->type != UNIT_SOCKET) return 0; /* Cannot run this without the service being around */ /* This makes sure instance is created if necessary. */ r = socket_instantiate_service(SOCKET(u)); if (r < 0) { log_error_unit(u->id, "Socket %s cannot be started, failed to create instance.", u->id); return r; } /* This checks both type of sockets */ if (UNIT_ISSET(SOCKET(u)->service)) { Service *service; service = SERVICE(UNIT_DEREF(SOCKET(u)->service)); log_debug_unit(u->id, "%s uses %s", u->id, UNIT(service)->id); if (UNIT(service)->load_state != UNIT_LOADED) { log_error_unit(u->id, "Service %s not loaded, %s cannot be started.", UNIT(service)->id, u->id); return -ENOENT; } } return 0; } static int verify_executable(Unit *u, ExecCommand *exec) { if (exec == NULL) return 0; if (access(exec->path, X_OK) < 0) { log_error_unit(u->id, "%s: command %s is not executable: %m", u->id, exec->path); return -errno; } return 0; } static int verify_executables(Unit *u) { ExecCommand *exec; int r = 0, k; unsigned i; assert(u); exec = u->type == UNIT_SOCKET ? SOCKET(u)->control_command : u->type == UNIT_MOUNT ? MOUNT(u)->control_command : u->type == UNIT_SWAP ? SWAP(u)->control_command : NULL; k = verify_executable(u, exec); if (k < 0 && r == 0) r = k; if (u->type == UNIT_SERVICE) for (i = 0; i < ELEMENTSOF(SERVICE(u)->exec_command); i++) { k = verify_executable(u, SERVICE(u)->exec_command[i]); if (k < 0 && r == 0) r = k; } if (u->type == UNIT_SOCKET) for (i = 0; i < ELEMENTSOF(SOCKET(u)->exec_command); i++) { k = verify_executable(u, SOCKET(u)->exec_command[i]); if (k < 0 && r == 0) r = k; } return r; } static int verify_documentation(Unit *u, bool check_man) { char **p; int r = 0, k; STRV_FOREACH(p, u->documentation) { log_debug_unit(u->id, "%s: found documentation item %s.", u->id, *p); if (check_man && startswith(*p, "man:")) { k = show_man_page(*p + 4, true); if (k != 0) { if (k < 0) log_error_unit(u->id, "%s: can't show %s: %s", u->id, *p, strerror(-r)); else { log_error_unit(u->id, "%s: man %s command failed with code %d", u->id, *p + 4, k); k = -ENOEXEC; } if (r == 0) r = k; } } } /* Check remote URLs? */ return r; } static int verify_unit(Unit *u, bool check_man) { _cleanup_bus_error_free_ sd_bus_error err = SD_BUS_ERROR_NULL; Job *j; int r, k; assert(u); if (log_get_max_level() >= LOG_DEBUG) unit_dump(u, stdout, "\t"); log_debug_unit(u->id, "Creating %s/start job", u->id); r = manager_add_job(u->manager, JOB_START, u, JOB_REPLACE, false, &err, &j); if (sd_bus_error_is_set(&err)) log_error_unit(u->id, "Error: %s: %s", err.name, err.message); if (r < 0) log_error_unit(u->id, "Failed to create %s/start: %s", u->id, strerror(-r)); k = verify_socket(u); if (k < 0 && r == 0) r = k; k = verify_executables(u); if (k < 0 && r == 0) r = k; k = verify_documentation(u, check_man); if (k < 0 && r == 0) r = k; return r; } int verify_units(char **filenames, SystemdRunningAs running_as, bool check_man) { _cleanup_bus_error_free_ sd_bus_error err = SD_BUS_ERROR_NULL; Manager *m = NULL; FILE *serial = NULL; FDSet *fdset = NULL; _cleanup_free_ char *var = NULL; char **filename; int r = 0, k; Unit *units[strv_length(filenames)]; int i, count = 0; if (strv_isempty(filenames)) return 0; /* set the path */ r = generate_path(&var, filenames); if (r < 0) { log_error("Failed to generate unit load path: %s", strerror(-r)); return r; } assert_se(set_unit_path(var) >= 0); r = manager_new(running_as, true, &m); if (r < 0) { log_error("Failed to initalize manager: %s", strerror(-r)); return r; } log_debug("Starting manager..."); r = manager_startup(m, serial, fdset); if (r < 0) { log_error("Failed to start manager: %s", strerror(-r)); goto finish; } manager_clear_jobs(m); log_debug("Loading remaining units from the command line..."); STRV_FOREACH(filename, filenames) { char fname[UNIT_NAME_MAX + 2 + 1] = "./"; log_debug("Handling %s...", *filename); /* manager_load_unit does not like pure basenames, so prepend * the local directory, but only for valid names. manager_load_unit * will print the error for other ones. */ if (!strchr(*filename, '/') && strlen(*filename) <= UNIT_NAME_MAX) { strncat(fname + 2, *filename, UNIT_NAME_MAX); k = manager_load_unit(m, NULL, fname, &err, &units[count]); } else k = manager_load_unit(m, NULL, *filename, &err, &units[count]); if (k < 0) { log_error("Failed to load %s: %s", *filename, strerror(-k)); if (r == 0) r = k; } else count ++; } for (i = 0; i < count; i++) { k = verify_unit(units[i], check_man); if (k < 0 && r == 0) r = k; } finish: manager_free(m); return r; }