diff --git a/lib/services/services_linux.c b/lib/services/services_linux.c
index 7216d9b7a7..d86f6bbb4d 100644
--- a/lib/services/services_linux.c
+++ b/lib/services/services_linux.c
@@ -1,768 +1,767 @@
/*
* Copyright (C) 2010 Andrew Beekhof <andrew@beekhof.net>
*
* 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 <crm_internal.h>
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <errno.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#ifdef HAVE_SYS_SIGNALFD_H
#include <sys/signalfd.h>
#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);
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 */
-#ifndef SCHED_RESET_ON_FORK
-# if defined(HAVE_SCHED_SETSCHEDULER)
+#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
+#endif
if (setpriority(PRIO_PROCESS, 0, 0) == -1) {
crm_perror(LOG_ERR, "Could not reset process priority to 0 for %s", op->id);
}
-#endif
+
/* 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, 0);
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