diff --git a/lib/services/services.c b/lib/services/services.c index b9b30f56f9..3fbd374abb 100644 --- a/lib/services/services.c +++ b/lib/services/services.c @@ -1,641 +1,639 @@ /* * Copyright (C) 2010 Andrew Beekhof * * 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 2.1 of the License, or (at your option) any later version. * * This software 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 library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include #include #include #include #include #include #include #include #include #include #include #include "services_private.h" #if SUPPORT_UPSTART # include #endif #if SUPPORT_SYSTEMD # include #endif /* TODO: Develop a rollover strategy */ static int operations = 0; GHashTable *recurring_actions = NULL; svc_action_t * services_action_create(const char *name, const char *action, int interval, int timeout) { return resources_action_create(name, "lsb", NULL, name, action, interval, timeout, NULL); } const char * resources_find_service_class(const char *agent) { /* Priority is: * - lsb * - systemd * - upstart */ int rc = 0; struct stat st; char *path = NULL; #ifdef LSB_ROOT_DIR rc = asprintf(&path, "%s/%s", LSB_ROOT_DIR, agent); if (rc > 0 && stat(path, &st) == 0) { free(path); return "lsb"; } free(path); #endif #if SUPPORT_SYSTEMD if (systemd_unit_exists(agent)) { return "systemd"; } #endif #if SUPPORT_UPSTART if (upstart_job_exists(agent)) { return "upstart"; } #endif return NULL; } svc_action_t * resources_action_create(const char *name, const char *standard, const char *provider, const char *agent, const char *action, int interval, int timeout, GHashTable * params) { svc_action_t *op = NULL; /* * Do some up front sanity checks before we go off and * build the svc_action_t instance. */ if (crm_strlen_zero(name)) { crm_err("A service or resource action must have a name."); goto return_error; } if (crm_strlen_zero(standard)) { crm_err("A service action must have a valid standard."); goto return_error; } if (!strcasecmp(standard, "ocf") && crm_strlen_zero(provider)) { crm_err("An OCF resource action must have a provider."); goto return_error; } if (crm_strlen_zero(agent)) { crm_err("A service or resource action must have an agent."); goto return_error; } if (crm_strlen_zero(action)) { crm_err("A service or resource action must specify an action."); goto return_error; } if (safe_str_eq(action, "monitor") && (safe_str_eq(standard, "lsb") || safe_str_eq(standard, "service"))) { action = "status"; } /* * Sanity checks passed, proceed! */ op = calloc(1, sizeof(svc_action_t)); op->opaque = calloc(1, sizeof(svc_action_private_t)); op->rsc = strdup(name); op->action = strdup(action); op->interval = interval; op->timeout = timeout; op->standard = strdup(standard); op->agent = strdup(agent); op->sequence = ++operations; if (asprintf(&op->id, "%s_%s_%d", name, action, interval) == -1) { goto return_error; } if (strcasecmp(op->standard, "service") == 0) { const char *expanded = resources_find_service_class(op->agent); if(expanded) { crm_debug("Found a %s agent for %s/%s", expanded, op->rsc, op->agent); free(op->standard); op->standard = strdup(expanded); } else { crm_info("Cannot determine the standard for %s (%s)", op->rsc, op->agent); free(op->standard); op->standard = strdup("lsb"); } } if (strcasecmp(op->standard, "ocf") == 0) { op->provider = strdup(provider); op->params = params; params = NULL; if (asprintf(&op->opaque->exec, "%s/resource.d/%s/%s", OCF_ROOT_DIR, provider, agent) == -1) { crm_err("Internal error: cannot create agent path"); goto return_error; } op->opaque->args[0] = strdup(op->opaque->exec); op->opaque->args[1] = strdup(action); } else if (strcasecmp(op->standard, "lsb") == 0) { if (op->agent[0] == '/') { /* if given an absolute path, use that instead * of tacking on the LSB_ROOT_DIR path to the front */ op->opaque->exec = strdup(op->agent); } else if (asprintf(&op->opaque->exec, "%s/%s", LSB_ROOT_DIR, op->agent) == -1) { crm_err("Internal error: cannot create agent path"); goto return_error; } op->opaque->args[0] = strdup(op->opaque->exec); op->opaque->args[1] = strdup(op->action); op->opaque->args[2] = NULL; #if SUPPORT_SYSTEMD } else if (strcasecmp(op->standard, "systemd") == 0) { op->opaque->exec = strdup("systemd-dbus"); #endif #if SUPPORT_UPSTART } else if (strcasecmp(op->standard, "upstart") == 0) { op->opaque->exec = strdup("upstart-dbus"); #endif } else if (strcasecmp(op->standard, "service") == 0) { op->opaque->exec = strdup(SERVICE_SCRIPT); op->opaque->args[0] = strdup(SERVICE_SCRIPT); op->opaque->args[1] = strdup(agent); op->opaque->args[2] = strdup(action); #if SUPPORT_NAGIOS } else if (strcasecmp(op->standard, "nagios") == 0) { int index = 0; if (op->agent[0] == '/') { /* if given an absolute path, use that instead * of tacking on the NAGIOS_PLUGIN_DIR path to the front */ op->opaque->exec = strdup(op->agent); } else if (asprintf(&op->opaque->exec, "%s/%s", NAGIOS_PLUGIN_DIR, op->agent) == -1) { crm_err("Internal error: cannot create agent path"); goto return_error; } op->opaque->args[0] = strdup(op->opaque->exec); index = 1; if (safe_str_eq(op->action, "monitor") && op->interval == 0) { /* Invoke --version for a nagios probe */ op->opaque->args[index] = strdup("--version"); index++; } else if (params) { GHashTableIter iter; char *key = NULL; char *value = NULL; static int args_size = sizeof(op->opaque->args) / sizeof(char *); g_hash_table_iter_init(&iter, params); while (g_hash_table_iter_next(&iter, (gpointer *) & key, (gpointer *) & value) && index <= args_size - 3) { int len = 3; char *long_opt = NULL; if (safe_str_eq(key, XML_ATTR_CRM_VERSION) || strstr(key, CRM_META "_")) { continue; } len += strlen(key); long_opt = calloc(1, len); sprintf(long_opt, "--%s", key); long_opt[len - 1] = 0; op->opaque->args[index] = long_opt; op->opaque->args[index + 1] = strdup(value); index += 2; } } op->opaque->args[index] = NULL; #endif } else { crm_err("Unknown resource standard: %s", op->standard); services_action_free(op); op = NULL; } if(params) { g_hash_table_destroy(params); } return op; return_error: if(params) { g_hash_table_destroy(params); } services_action_free(op); return NULL; } svc_action_t * services_action_create_generic(const char *exec, const char *args[]) { svc_action_t *op; unsigned int cur_arg; op = calloc(1, sizeof(*op)); op->opaque = calloc(1, sizeof(svc_action_private_t)); op->opaque->exec = strdup(exec); op->opaque->args[0] = strdup(exec); for (cur_arg = 1; args && args[cur_arg - 1]; cur_arg++) { op->opaque->args[cur_arg] = strdup(args[cur_arg - 1]); if (cur_arg == DIMOF(op->opaque->args) - 1) { crm_err("svc_action_t args list not long enough for '%s' execution request.", exec); break; } } return op; } void services_action_free(svc_action_t * op) { unsigned int i; if (op == NULL) { return; } if (op->opaque->repeat_timer) { g_source_remove(op->opaque->repeat_timer); } if (op->opaque->stderr_gsource) { mainloop_del_fd(op->opaque->stderr_gsource); op->opaque->stderr_gsource = NULL; } if (op->opaque->stdout_gsource) { mainloop_del_fd(op->opaque->stdout_gsource); op->opaque->stdout_gsource = NULL; } free(op->id); free(op->opaque->exec); for (i = 0; i < DIMOF(op->opaque->args); i++) { free(op->opaque->args[i]); } free(op->opaque); free(op->rsc); free(op->action); free(op->standard); free(op->agent); free(op->provider); free(op->stdout_data); free(op->stderr_data); if (op->params) { g_hash_table_destroy(op->params); op->params = NULL; } free(op); } gboolean cancel_recurring_action(svc_action_t * op) { crm_info("Cancelling operation %s", op->id); if (recurring_actions) { g_hash_table_remove(recurring_actions, op->id); } if (op->opaque->repeat_timer) { g_source_remove(op->opaque->repeat_timer); } return TRUE; } gboolean services_action_cancel(const char *name, const char *action, int interval) { svc_action_t *op = NULL; char id[512]; snprintf(id, sizeof(id), "%s_%s_%d", name, action, interval); if (!(op = g_hash_table_lookup(recurring_actions, id))) { return FALSE; } if (op->pid == 0) { cancel_recurring_action(op); op->status = PCMK_LRM_OP_CANCELLED; if (op->opaque->callback) { op->opaque->callback(op); } services_action_free(op); } else { - int rc; crm_info("Cancelling in-flight op: performing early termination of %s", id); op->cancel = 1; - rc = mainloop_child_kill(op->pid); - if (rc != 0 ) { + if (mainloop_child_kill(op->pid) == FALSE) { /* even though the early termination failed, * the op will be marked as cancelled once it completes. */ crm_err("Termination of %s failed", id); } } return TRUE; } gboolean services_action_kick(const char *name, const char *action, int interval /* ms */) { svc_action_t * op = NULL; char *id = NULL; if (asprintf(&id, "%s_%s_%d", name, action, interval) == -1) { return FALSE; } op = g_hash_table_lookup(recurring_actions, id); free(id); if (op == NULL) { return FALSE; } if (op->pid) { return TRUE; } else { if (op->opaque->repeat_timer) { g_source_remove(op->opaque->repeat_timer); } recurring_action_timer(op); return TRUE; } } /* add new recurring operation, check for duplicates. * - if duplicate found, return TRUE, immediately reschedule op. * - if no dup, return FALSE, inserve into recurring op list.*/ static gboolean handle_duplicate_recurring(svc_action_t * op, void (*action_callback) (svc_action_t *)) { svc_action_t * dup = NULL; if (recurring_actions == NULL) { recurring_actions = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, NULL); return FALSE; } /* check for duplicates */ dup = g_hash_table_lookup(recurring_actions, op->id); if (dup && (dup != op)) { /* update user data */ if (op->opaque->callback) { dup->opaque->callback = op->opaque->callback; dup->cb_data = op->cb_data; op->cb_data = NULL; } /* immediately execute the next interval */ if (dup->pid != 0) { if (op->opaque->repeat_timer) { g_source_remove(op->opaque->repeat_timer); } recurring_action_timer(dup); } /* free the dup. */ services_action_free(op); return TRUE; } return FALSE; } gboolean services_action_async(svc_action_t * op, void (*action_callback) (svc_action_t *)) { if (action_callback) { op->opaque->callback = action_callback; } if (op->interval > 0) { if (handle_duplicate_recurring(op, action_callback) == TRUE) { /* entry rescheduled, dup freed */ return TRUE; } g_hash_table_replace(recurring_actions, op->id, op); } if (op->standard && strcasecmp(op->standard, "upstart") == 0) { #if SUPPORT_UPSTART return upstart_job_exec(op, FALSE); #endif } if (op->standard && strcasecmp(op->standard, "systemd") == 0) { #if SUPPORT_SYSTEMD return systemd_unit_exec(op, FALSE); #endif } return services_os_action_execute(op, FALSE); } gboolean services_action_sync(svc_action_t * op) { gboolean rc = TRUE; if (op == NULL) { crm_trace("No operation to execute"); return FALSE; } else if (op->standard && strcasecmp(op->standard, "upstart") == 0) { #if SUPPORT_UPSTART rc = upstart_job_exec(op, TRUE); #endif } else if (op->standard && strcasecmp(op->standard, "systemd") == 0) { #if SUPPORT_SYSTEMD rc = systemd_unit_exec(op, TRUE); #endif } else { rc = services_os_action_execute(op, TRUE); } crm_trace(" > %s_%s_%d: %s = %d", op->rsc, op->action, op->interval, op->opaque->exec, op->rc); if (op->stdout_data) { crm_trace(" > stdout: %s", op->stdout_data); } if (op->stderr_data) { crm_trace(" > stderr: %s", op->stderr_data); } return rc; } GList * get_directory_list(const char *root, gboolean files, gboolean executable) { return services_os_get_directory_list(root, files, executable); } GList * services_list(void) { return resources_list_agents("lsb", NULL); } GList * resources_list_standards(void) { GList *standards = NULL; GList *agents = NULL; standards = g_list_append(standards, strdup("ocf")); standards = g_list_append(standards, strdup("lsb")); standards = g_list_append(standards, strdup("service")); #if SUPPORT_SYSTEMD agents = systemd_unit_listall(); #else agents = NULL; #endif if (agents) { standards = g_list_append(standards, strdup("systemd")); g_list_free_full(agents, free); } #if SUPPORT_UPSTART agents = upstart_job_listall(); #else agents = NULL; #endif if (agents) { standards = g_list_append(standards, strdup("upstart")); g_list_free_full(agents, free); } #if SUPPORT_NAGIOS agents = resources_os_list_nagios_agents(); if (agents) { standards = g_list_append(standards, strdup("nagios")); g_list_free_full(agents, free); } #endif return standards; } GList * resources_list_providers(const char *standard) { if (strcasecmp(standard, "ocf") == 0) { return resources_os_list_ocf_providers(); } return NULL; } GList * resources_list_agents(const char *standard, const char *provider) { if (standard == NULL || strcasecmp(standard, "service") == 0) { GList *tmp1; GList *tmp2; GList *result = resources_os_list_lsb_agents(); if (standard == NULL) { tmp1 = result; tmp2 = resources_os_list_ocf_agents(NULL); if (tmp2) { result = g_list_concat(tmp1, tmp2); } } #if SUPPORT_SYSTEMD tmp1 = result; tmp2 = systemd_unit_listall(); if (tmp2) { result = g_list_concat(tmp1, tmp2); } #endif #if SUPPORT_UPSTART tmp1 = result; tmp2 = upstart_job_listall(); if (tmp2) { result = g_list_concat(tmp1, tmp2); } #endif return result; } else if (strcasecmp(standard, "ocf") == 0) { return resources_os_list_ocf_agents(provider); } else if (strcasecmp(standard, "lsb") == 0) { return resources_os_list_lsb_agents(); #if SUPPORT_SYSTEMD } else if (strcasecmp(standard, "systemd") == 0) { return systemd_unit_listall(); #endif #if SUPPORT_UPSTART } else if (strcasecmp(standard, "upstart") == 0) { return upstart_job_listall(); #endif #if SUPPORT_NAGIOS } else if (strcasecmp(standard, "nagios") == 0) { return resources_os_list_nagios_agents(); #endif } return NULL; } diff --git a/lib/services/services_linux.c b/lib/services/services_linux.c index b5f680b153..419e7ffb5c 100644 --- a/lib/services/services_linux.c +++ b/lib/services/services_linux.c @@ -1,767 +1,768 @@ /* * Copyright (C) 2010 Andrew Beekhof * * 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 2.1 of the License, or (at your option) any later version. * * This software 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 library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_SYS_SIGNALFD_H #include #endif #include "crm/crm.h" #include "crm/common/mainloop.h" #include "crm/services.h" #include "services_private.h" #if SUPPORT_CIBSECRETS # include "crm/common/cib_secrets.h" #endif static inline void set_fd_opts(int fd, int opts) { int flag; if ((flag = fcntl(fd, F_GETFL)) >= 0) { if (fcntl(fd, F_SETFL, flag | opts) < 0) { crm_err("fcntl() write failed"); } } else { crm_err("fcntl() read failed"); } } static gboolean read_output(int fd, svc_action_t * op) { char *data = NULL; int rc = 0, len = 0; gboolean is_err = FALSE; char buf[500]; static const size_t buf_read_len = sizeof(buf) - 1; crm_trace("%p", op); if (fd < 0) { return FALSE; } if (fd == op->opaque->stderr_fd) { is_err = TRUE; if (op->stderr_data) { len = strlen(op->stderr_data); data = op->stderr_data; } } else if (op->stdout_data) { len = strlen(op->stdout_data); data = op->stdout_data; } do { rc = read(fd, buf, buf_read_len); if (rc > 0) { buf[rc] = 0; data = realloc(data, len + rc + 1); sprintf(data + len, "%s", buf); len += rc; } else if (errno != EINTR) { /* error or EOF * Cleanup happens in pipe_done() */ rc = FALSE; break; } } while (rc == buf_read_len || rc < 0); if (data != NULL && is_err) { op->stderr_data = data; } else if (data != NULL) { op->stdout_data = data; } return rc; } static int dispatch_stdout(gpointer userdata) { svc_action_t *op = (svc_action_t *) userdata; return read_output(op->opaque->stdout_fd, op); } static int dispatch_stderr(gpointer userdata) { svc_action_t *op = (svc_action_t *) userdata; return read_output(op->opaque->stderr_fd, op); } static void pipe_out_done(gpointer user_data) { svc_action_t *op = (svc_action_t *) user_data; crm_trace("%p", op); op->opaque->stdout_gsource = NULL; if (op->opaque->stdout_fd > STDOUT_FILENO) { close(op->opaque->stdout_fd); } op->opaque->stdout_fd = -1; } static void pipe_err_done(gpointer user_data) { svc_action_t *op = (svc_action_t *) user_data; op->opaque->stderr_gsource = NULL; if (op->opaque->stderr_fd > STDERR_FILENO) { close(op->opaque->stderr_fd); } op->opaque->stderr_fd = -1; } static struct mainloop_fd_callbacks stdout_callbacks = { .dispatch = dispatch_stdout, .destroy = pipe_out_done, }; static struct mainloop_fd_callbacks stderr_callbacks = { .dispatch = dispatch_stderr, .destroy = pipe_err_done, }; static void set_ocf_env(const char *key, const char *value, gpointer user_data) { if (setenv(key, value, 1) != 0) { crm_perror(LOG_ERR, "setenv failed for key:%s and value:%s", key, value); } } static void set_ocf_env_with_prefix(gpointer key, gpointer value, gpointer user_data) { char buffer[500]; snprintf(buffer, sizeof(buffer), "OCF_RESKEY_%s", (char *)key); set_ocf_env(buffer, value, user_data); } static void add_OCF_env_vars(svc_action_t * op) { if (!op->standard || strcasecmp("ocf", op->standard) != 0) { return; } if (op->params) { g_hash_table_foreach(op->params, set_ocf_env_with_prefix, NULL); } set_ocf_env("OCF_RA_VERSION_MAJOR", "1", NULL); set_ocf_env("OCF_RA_VERSION_MINOR", "0", NULL); set_ocf_env("OCF_ROOT", OCF_ROOT_DIR, NULL); if (op->rsc) { set_ocf_env("OCF_RESOURCE_INSTANCE", op->rsc, NULL); } if (op->agent != NULL) { set_ocf_env("OCF_RESOURCE_TYPE", op->agent, NULL); } /* Notes: this is not added to specification yet. Sept 10,2004 */ if (op->provider != NULL) { set_ocf_env("OCF_RESOURCE_PROVIDER", op->provider, NULL); } } gboolean recurring_action_timer(gpointer data) { svc_action_t *op = data; crm_debug("Scheduling another invokation of %s", op->id); /* Clean out the old result */ free(op->stdout_data); op->stdout_data = NULL; free(op->stderr_data); op->stderr_data = NULL; services_action_async(op, NULL); return FALSE; } /* Returns FALSE if 'op' should be free'd by the caller */ gboolean operation_finalize(svc_action_t * op) { int recurring = 0; if (op->interval) { if (op->cancel) { op->status = PCMK_LRM_OP_CANCELLED; cancel_recurring_action(op); } else { recurring = 1; op->opaque->repeat_timer = g_timeout_add(op->interval, recurring_action_timer, (void *)op); } } if (op->opaque->callback) { op->opaque->callback(op); } op->pid = 0; if (!recurring) { /* * If this is a recurring action, do not free explicitly. * It will get freed whenever the action gets cancelled. */ services_action_free(op); return TRUE; } return FALSE; } static void operation_finished(mainloop_child_t * p, pid_t pid, int core, int signo, int exitcode) { svc_action_t *op = mainloop_child_userdata(p); char *prefix = g_strdup_printf("%s:%d", op->id, op->pid); mainloop_clear_child_userdata(p); op->status = PCMK_LRM_OP_DONE; CRM_ASSERT(op->pid == pid); if (op->opaque->stderr_gsource) { /* Make sure we have read everything from the buffer. * Depending on the priority mainloop gives the fd, operation_finished * could occur before all the reads are done. Force the read now.*/ dispatch_stderr(op); } if (op->opaque->stdout_gsource) { /* Make sure we have read everything from the buffer. * Depending on the priority mainloop gives the fd, operation_finished * could occur before all the reads are done. Force the read now.*/ dispatch_stdout(op); } if (signo) { if (mainloop_child_timeout(p)) { crm_warn("%s - timed out after %dms", prefix, op->timeout); op->status = PCMK_LRM_OP_TIMEOUT; op->rc = PCMK_OCF_TIMEOUT; } else { - crm_warn("%s - terminated with signal %d", prefix, signo); + do_crm_log_unlikely((op->cancel) ? LOG_INFO : LOG_WARNING, + "%s - terminated with signal %d", prefix, signo); op->status = PCMK_LRM_OP_ERROR; op->rc = PCMK_OCF_SIGNAL; } } else { op->rc = exitcode; crm_debug("%s - exited with rc=%d", prefix, exitcode); } g_free(prefix); prefix = g_strdup_printf("%s:%d:stderr", op->id, op->pid); crm_log_output(LOG_NOTICE, prefix, op->stderr_data); g_free(prefix); prefix = g_strdup_printf("%s:%d:stdout", op->id, op->pid); crm_log_output(LOG_DEBUG, prefix, op->stdout_data); g_free(prefix); operation_finalize(op); } static void services_handle_exec_error(svc_action_t * op, int error) { op->rc = PCMK_OCF_EXEC_ERROR; op->status = PCMK_LRM_OP_ERROR; /* Need to mimic the return codes for each standard as thats what we'll convert back from in get_uniform_rc() */ if (safe_str_eq(op->standard, "lsb") && safe_str_eq(op->action, "status")) { switch (error) { /* see execve(2) */ case ENOENT: /* No such file or directory */ case EISDIR: /* Is a directory */ op->rc = PCMK_LSB_STATUS_NOT_INSTALLED; op->status = PCMK_LRM_OP_NOT_INSTALLED; break; case EACCES: /* permission denied (various errors) */ /* LSB status ops don't support 'not installed' */ break; } #if SUPPORT_NAGIOS } else if (safe_str_eq(op->standard, "nagios")) { switch (error) { case ENOENT: /* No such file or directory */ case EISDIR: /* Is a directory */ op->rc = NAGIOS_NOT_INSTALLED; op->status = PCMK_LRM_OP_NOT_INSTALLED; break; case EACCES: /* permission denied (various errors) */ op->rc = NAGIOS_INSUFFICIENT_PRIV; break; } #endif } else { switch (error) { case ENOENT: /* No such file or directory */ case EISDIR: /* Is a directory */ op->rc = PCMK_OCF_NOT_INSTALLED; /* Valid for LSB */ op->status = PCMK_LRM_OP_NOT_INSTALLED; break; case EACCES: /* permission denied (various errors) */ op->rc = PCMK_OCF_INSUFFICIENT_PRIV; /* Valid for LSB */ break; } } } /* Returns FALSE if 'op' should be free'd by the caller */ gboolean services_os_action_execute(svc_action_t * op, gboolean synchronous) { int lpc; int stdout_fd[2]; int stderr_fd[2]; sigset_t mask; sigset_t old_mask; struct stat st; if (pipe(stdout_fd) < 0) { crm_err("pipe() failed"); } if (pipe(stderr_fd) < 0) { crm_err("pipe() failed"); } /* Fail fast */ if(stat(op->opaque->exec, &st) != 0) { int rc = errno; crm_warn("Cannot execute '%s': %s (%d)", op->opaque->exec, pcmk_strerror(rc), rc); services_handle_exec_error(op, rc); if (!synchronous) { return operation_finalize(op); } return FALSE; } if (synchronous) { sigemptyset(&mask); sigaddset(&mask, SIGCHLD); sigemptyset(&old_mask); if (sigprocmask(SIG_BLOCK, &mask, &old_mask) < 0) { crm_perror(LOG_ERR, "sigprocmask() failed"); } } op->pid = fork(); switch (op->pid) { case -1: { int rc = errno; close(stdout_fd[0]); close(stdout_fd[1]); close(stderr_fd[0]); close(stderr_fd[1]); crm_err("Could not execute '%s': %s (%d)", op->opaque->exec, pcmk_strerror(rc), rc); services_handle_exec_error(op, rc); if (!synchronous) { return operation_finalize(op); } return FALSE; } case 0: /* Child */ #if defined(HAVE_SCHED_SETSCHEDULER) if (sched_getscheduler(0) != SCHED_OTHER) { struct sched_param sp; memset(&sp, 0, sizeof(sp)); sp.sched_priority = 0; if (sched_setscheduler(0, SCHED_OTHER, &sp) == -1) { crm_perror(LOG_ERR, "Could not reset scheduling policy to SCHED_OTHER for %s", op->id); } } #endif if (setpriority(PRIO_PROCESS, 0, 0) == -1) { crm_perror(LOG_ERR, "Could not reset process priority to 0 for %s", op->id); } /* Man: The call setpgrp() is equivalent to setpgid(0,0) * _and_ compiles on BSD variants too * need to investigate if it works the same too. */ setpgid(0, 0); close(stdout_fd[0]); close(stderr_fd[0]); if (STDOUT_FILENO != stdout_fd[1]) { if (dup2(stdout_fd[1], STDOUT_FILENO) != STDOUT_FILENO) { crm_err("dup2() failed (stdout)"); } close(stdout_fd[1]); } if (STDERR_FILENO != stderr_fd[1]) { if (dup2(stderr_fd[1], STDERR_FILENO) != STDERR_FILENO) { crm_err("dup2() failed (stderr)"); } close(stderr_fd[1]); } /* close all descriptors except stdin/out/err and channels to logd */ for (lpc = getdtablesize() - 1; lpc > STDERR_FILENO; lpc--) { close(lpc); } #if SUPPORT_CIBSECRETS if (replace_secret_params(op->rsc, op->params) < 0) { /* replacing secrets failed! */ if (safe_str_eq(op->action,"stop")) { /* don't fail on stop! */ crm_info("proceeding with the stop operation for %s", op->rsc); } else { crm_err("failed to get secrets for %s, " "considering resource not configured", op->rsc); _exit(PCMK_OCF_NOT_CONFIGURED); } } #endif /* Setup environment correctly */ add_OCF_env_vars(op); /* execute the RA */ execvp(op->opaque->exec, op->opaque->args); /* Most cases should have been already handled by stat() */ services_handle_exec_error(op, errno); _exit(op->rc); } /* Only the parent reaches here */ close(stdout_fd[1]); close(stderr_fd[1]); op->opaque->stdout_fd = stdout_fd[0]; set_fd_opts(op->opaque->stdout_fd, O_NONBLOCK); op->opaque->stderr_fd = stderr_fd[0]; set_fd_opts(op->opaque->stderr_fd, O_NONBLOCK); if (synchronous) { #ifndef HAVE_SYS_SIGNALFD_H CRM_ASSERT(FALSE); #else int status = 0; int timeout = op->timeout; int sfd = -1; time_t start = -1; struct pollfd fds[3]; int wait_rc = 0; sfd = signalfd(-1, &mask, SFD_NONBLOCK); if (sfd < 0) { crm_perror(LOG_ERR, "signalfd() failed"); } fds[0].fd = op->opaque->stdout_fd; fds[0].events = POLLIN; fds[0].revents = 0; fds[1].fd = op->opaque->stderr_fd; fds[1].events = POLLIN; fds[1].revents = 0; fds[2].fd = sfd; fds[2].events = POLLIN; fds[2].revents = 0; crm_trace("Waiting for %d", op->pid); start = time(NULL); do { int poll_rc = poll(fds, 3, timeout); if (poll_rc > 0) { if (fds[0].revents & POLLIN) { read_output(op->opaque->stdout_fd, op); } if (fds[1].revents & POLLIN) { read_output(op->opaque->stderr_fd, op); } if (fds[2].revents & POLLIN) { struct signalfd_siginfo fdsi; ssize_t s; s = read(sfd, &fdsi, sizeof(struct signalfd_siginfo)); if (s != sizeof(struct signalfd_siginfo)) { crm_perror(LOG_ERR, "Read from signal fd %d failed", sfd); } else if (fdsi.ssi_signo == SIGCHLD) { wait_rc = waitpid(op->pid, &status, WNOHANG); if (wait_rc < 0){ crm_perror(LOG_ERR, "waitpid() for %d failed", op->pid); } else if (wait_rc > 0) { break; } } } } else if (poll_rc == 0) { timeout = 0; break; } else if (poll_rc < 0) { if (errno != EINTR) { crm_perror(LOG_ERR, "poll() failed"); break; } } timeout = op->timeout - (time(NULL) - start) * 1000; } while ((op->timeout < 0 || timeout > 0)); crm_trace("Child done: %d", op->pid); if (wait_rc <= 0) { int killrc = kill(op->pid, SIGKILL); op->rc = PCMK_OCF_UNKNOWN_ERROR; if (op->timeout > 0 && timeout <= 0) { op->status = PCMK_LRM_OP_TIMEOUT; crm_warn("%s:%d - timed out after %dms", op->id, op->pid, op->timeout); } else { op->status = PCMK_LRM_OP_ERROR; } if (killrc && errno != ESRCH) { crm_err("kill(%d, KILL) failed: %d", op->pid, errno); } /* * From sigprocmask(2): * It is not possible to block SIGKILL or SIGSTOP. Attempts to do so are silently ignored. * * This makes it safe to skip WNOHANG here */ waitpid(op->pid, &status, 0); } else if (WIFEXITED(status)) { op->status = PCMK_LRM_OP_DONE; op->rc = WEXITSTATUS(status); crm_info("Managed %s process %d exited with rc=%d", op->id, op->pid, op->rc); } else if (WIFSIGNALED(status)) { int signo = WTERMSIG(status); op->status = PCMK_LRM_OP_ERROR; crm_err("Managed %s process %d exited with signal=%d", op->id, op->pid, signo); } #ifdef WCOREDUMP if (WCOREDUMP(status)) { crm_err("Managed %s process %d dumped core", op->id, op->pid); } #endif read_output(op->opaque->stdout_fd, op); read_output(op->opaque->stderr_fd, op); close(op->opaque->stdout_fd); close(op->opaque->stderr_fd); close(sfd); if (sigismember(&old_mask, SIGCHLD) == 0) { if (sigprocmask(SIG_UNBLOCK, &mask, NULL) < 0) { crm_perror(LOG_ERR, "sigprocmask() to unblocked failed"); } } #endif } else { crm_trace("Async waiting for %d - %s", op->pid, op->opaque->exec); mainloop_child_add(op->pid, op->timeout, op->id, op, operation_finished); op->opaque->stdout_gsource = mainloop_add_fd(op->id, G_PRIORITY_LOW, op->opaque->stdout_fd, op, &stdout_callbacks); op->opaque->stderr_gsource = mainloop_add_fd(op->id, G_PRIORITY_LOW, op->opaque->stderr_fd, op, &stderr_callbacks); } return TRUE; } GList * services_os_get_directory_list(const char *root, gboolean files, gboolean executable) { GList *list = NULL; struct dirent **namelist; int entries = 0, lpc = 0; char buffer[PATH_MAX]; entries = scandir(root, &namelist, NULL, alphasort); if (entries <= 0) { return list; } for (lpc = 0; lpc < entries; lpc++) { struct stat sb; if ('.' == namelist[lpc]->d_name[0]) { free(namelist[lpc]); continue; } snprintf(buffer, sizeof(buffer), "%s/%s", root, namelist[lpc]->d_name); if (stat(buffer, &sb)) { continue; } if (S_ISDIR(sb.st_mode)) { if (files) { free(namelist[lpc]); continue; } } else if (S_ISREG(sb.st_mode)) { if (files == FALSE) { free(namelist[lpc]); continue; } else if (executable && (sb.st_mode & S_IXUSR) == 0 && (sb.st_mode & S_IXGRP) == 0 && (sb.st_mode & S_IXOTH) == 0) { free(namelist[lpc]); continue; } } list = g_list_append(list, strdup(namelist[lpc]->d_name)); free(namelist[lpc]); } free(namelist); return list; } GList * resources_os_list_lsb_agents(void) { return get_directory_list(LSB_ROOT_DIR, TRUE, TRUE); } GList * resources_os_list_ocf_providers(void) { return get_directory_list(OCF_ROOT_DIR "/resource.d", FALSE, TRUE); } GList * resources_os_list_ocf_agents(const char *provider) { GList *gIter = NULL; GList *result = NULL; GList *providers = NULL; if (provider) { char buffer[500]; snprintf(buffer, sizeof(buffer), "%s/resource.d/%s", OCF_ROOT_DIR, provider); return get_directory_list(buffer, TRUE, TRUE); } providers = resources_os_list_ocf_providers(); for (gIter = providers; gIter != NULL; gIter = gIter->next) { GList *tmp1 = result; GList *tmp2 = resources_os_list_ocf_agents(gIter->data); if (tmp2) { result = g_list_concat(tmp1, tmp2); } } g_list_free_full(providers, free); return result; } #if SUPPORT_NAGIOS GList * resources_os_list_nagios_agents(void) { GList *plugin_list = NULL; GList *result = NULL; GList *gIter = NULL; plugin_list = get_directory_list(NAGIOS_PLUGIN_DIR, TRUE, TRUE); /* Make sure both the plugin and its metadata exist */ for (gIter = plugin_list; gIter != NULL; gIter = gIter->next) { const char *plugin = gIter->data; char *metadata = g_strdup_printf(NAGIOS_METADATA_DIR "/%s.xml", plugin); struct stat st; if (stat(metadata, &st) == 0) { result = g_list_append(result, strdup(plugin)); } g_free(metadata); } g_list_free_full(plugin_list, free); return result; } #endif