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/*
* Copyright 2010-2023 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU Lesser General Public License
* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
*/
#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 <grp.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "crm/crm.h"
#include <crm/msg_xml.h>
#include "crm/common/mainloop.h"
#include "crm/services.h"
#include "services_private.h"
#include "services_nagios.h"
/*!
* \internal
* \brief Prepare a Nagios action
*
* \param[in,out] op Action to prepare
*
* \return Standard Pacemaker return code
*/
int
services__nagios_prepare(svc_action_t *op)
{
op->opaque->exec = pcmk__full_path(op->agent, NAGIOS_PLUGIN_DIR);
op->opaque->args[0] = strdup(op->opaque->exec);
if (op->opaque->args[0] == NULL) {
return ENOMEM;
}
if (pcmk__str_eq(op->action, PCMK_ACTION_MONITOR, pcmk__str_casei)
&& (op->interval_ms == 0)) {
// Invoke --version for a nagios probe
op->opaque->args[1] = strdup("--version");
if (op->opaque->args[1] == NULL) {
return ENOMEM;
}
} else if (op->params != NULL) {
GHashTableIter iter;
char *key = NULL;
char *value = NULL;
int index = 1; // 0 is already set to executable name
g_hash_table_iter_init(&iter, op->params);
while (g_hash_table_iter_next(&iter, (gpointer *) & key,
(gpointer *) & value)) {
if (index > (PCMK__NELEM(op->opaque->args) - 2)) {
return E2BIG;
}
if (pcmk__str_eq(key, XML_ATTR_CRM_VERSION, pcmk__str_casei)
|| strstr(key, CRM_META "_")) {
continue;
}
op->opaque->args[index++] = crm_strdup_printf("--%s", key);
op->opaque->args[index++] = strdup(value);
if (op->opaque->args[index - 1] == NULL) {
return ENOMEM;
}
}
}
// Nagios actions don't need to keep the parameters
if (op->params != NULL) {
g_hash_table_destroy(op->params);
op->params = NULL;
}
return pcmk_rc_ok;
}
/*!
* \internal
* \brief Map a Nagios result to a standard OCF result
*
* \param[in] exit_status Nagios exit status
*
* \return Standard OCF result
*/
enum ocf_exitcode
services__nagios2ocf(int exit_status)
{
switch (exit_status) {
case NAGIOS_STATE_OK:
return PCMK_OCF_OK;
case NAGIOS_INSUFFICIENT_PRIV:
return PCMK_OCF_INSUFFICIENT_PRIV;
case NAGIOS_STATE_WARNING:
return PCMK_OCF_DEGRADED;
case NAGIOS_STATE_CRITICAL:
case NAGIOS_STATE_UNKNOWN:
default:
return PCMK_OCF_UNKNOWN_ERROR;
}
}
static inline char *
nagios_metadata_name(const char *plugin)
{
return crm_strdup_printf(NAGIOS_METADATA_DIR "/%s.xml", plugin);
}
GList *
services__list_nagios_agents(void)
{
GList *plugin_list = NULL;
GList *result = NULL;
plugin_list = services_os_get_directory_list(NAGIOS_PLUGIN_DIR, TRUE, TRUE);
// Return only the plugins that have metadata
for (GList *gIter = plugin_list; gIter != NULL; gIter = gIter->next) {
struct stat st;
const char *plugin = gIter->data;
char *metadata = nagios_metadata_name(plugin);
if (stat(metadata, &st) == 0) {
result = g_list_append(result, strdup(plugin));
}
free(metadata);
}
g_list_free_full(plugin_list, free);
return result;
}
gboolean
services__nagios_agent_exists(const char *name)
{
char *buf = NULL;
gboolean rc = FALSE;
struct stat st;
if (name == NULL) {
return rc;
}
buf = crm_strdup_printf(NAGIOS_PLUGIN_DIR "/%s", name);
if (stat(buf, &st) == 0) {
rc = TRUE;
}
free(buf);
return rc;
}
int
services__get_nagios_metadata(const char *type, char **output)
{
int rc = pcmk_ok;
FILE *file_strm = NULL;
int start = 0, length = 0, read_len = 0;
char *metadata_file = nagios_metadata_name(type);
file_strm = fopen(metadata_file, "r");
if (file_strm == NULL) {
crm_err("Metadata file %s does not exist", metadata_file);
free(metadata_file);
return -EIO;
}
/* see how big the file is */
start = ftell(file_strm);
fseek(file_strm, 0L, SEEK_END);
length = ftell(file_strm);
fseek(file_strm, 0L, start);
CRM_ASSERT(length >= 0);
CRM_ASSERT(start == ftell(file_strm));
if (length <= 0) {
crm_info("%s was not valid", metadata_file);
free(*output);
*output = NULL;
rc = -EIO;
} else {
crm_trace("Reading %d bytes from file", length);
*output = calloc(1, (length + 1));
read_len = fread(*output, 1, length, file_strm);
if (read_len != length) {
crm_err("Calculated and read bytes differ: %d vs. %d",
length, read_len);
free(*output);
*output = NULL;
rc = -EIO;
}
}
fclose(file_strm);
free(metadata_file);
return rc;
}
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