pacemaker  2.0.4-2deceaa
Scalable High-Availability cluster resource manager
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services_nagios.c
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1 /*
2  * Copyright 2010-2019 the Pacemaker project contributors
3  *
4  * The version control history for this file may have further details.
5  *
6  * This source code is licensed under the GNU Lesser General Public License
7  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
8  */
9 
10 #include <crm_internal.h>
11 
12 #ifndef _GNU_SOURCE
13 # define _GNU_SOURCE
14 #endif
15 
16 #include <sys/types.h>
17 #include <sys/stat.h>
18 #include <sys/wait.h>
19 #include <errno.h>
20 #include <unistd.h>
21 #include <dirent.h>
22 #include <grp.h>
23 #include <string.h>
24 #include <sys/time.h>
25 #include <sys/resource.h>
26 
27 #include "crm/crm.h"
28 #include "crm/common/mainloop.h"
29 #include "crm/services.h"
30 
31 #include "services_private.h"
32 #include "services_nagios.h"
33 
34 static inline char *
35 nagios_metadata_name(const char *plugin)
36 {
37  return crm_strdup_printf(NAGIOS_METADATA_DIR "/%s.xml", plugin);
38 }
39 
40 GList *
42 {
43  GList *plugin_list = NULL;
44  GList *result = NULL;
45 
46  plugin_list = services_os_get_directory_list(NAGIOS_PLUGIN_DIR, TRUE, TRUE);
47 
48  // Return only the plugins that have metadata
49  for (GList *gIter = plugin_list; gIter != NULL; gIter = gIter->next) {
50  struct stat st;
51  const char *plugin = gIter->data;
52  char *metadata = nagios_metadata_name(plugin);
53 
54  if (stat(metadata, &st) == 0) {
55  result = g_list_append(result, strdup(plugin));
56  }
57  free(metadata);
58  }
59  g_list_free_full(plugin_list, free);
60  return result;
61 }
62 
63 gboolean
65 {
66  char *buf = NULL;
67  gboolean rc = FALSE;
68  struct stat st;
69 
70  if (name == NULL) {
71  return rc;
72  }
73 
74  buf = crm_strdup_printf(NAGIOS_PLUGIN_DIR "/%s", name);
75  if (stat(buf, &st) == 0) {
76  rc = TRUE;
77  }
78 
79  free(buf);
80  return rc;
81 }
82 
83 int
84 services__get_nagios_metadata(const char *type, char **output)
85 {
86  int rc = pcmk_ok;
87  FILE *file_strm = NULL;
88  int start = 0, length = 0, read_len = 0;
89  char *metadata_file = nagios_metadata_name(type);
90 
91  file_strm = fopen(metadata_file, "r");
92  if (file_strm == NULL) {
93  crm_err("Metadata file %s does not exist", metadata_file);
94  free(metadata_file);
95  return -EIO;
96  }
97 
98  /* see how big the file is */
99  start = ftell(file_strm);
100  fseek(file_strm, 0L, SEEK_END);
101  length = ftell(file_strm);
102  fseek(file_strm, 0L, start);
103 
104  CRM_ASSERT(length >= 0);
105  CRM_ASSERT(start == ftell(file_strm));
106 
107  if (length <= 0) {
108  crm_info("%s was not valid", metadata_file);
109  free(*output);
110  *output = NULL;
111  rc = -EIO;
112 
113  } else {
114  crm_trace("Reading %d bytes from file", length);
115  *output = calloc(1, (length + 1));
116  read_len = fread(*output, 1, length, file_strm);
117  if (read_len != length) {
118  crm_err("Calculated and read bytes differ: %d vs. %d",
119  length, read_len);
120  free(*output);
121  *output = NULL;
122  rc = -EIO;
123  }
124  }
125 
126  fclose(file_strm);
127  free(metadata_file);
128  return rc;
129 }
Services API.
A dumping ground.
int services__get_nagios_metadata(const char *type, char **output)
GList * services_os_get_directory_list(const char *root, gboolean files, gboolean executable)
Wrappers for and extensions to glib mainloop.
int rc
Definition: pcmk_fence.c:34
#define crm_trace(fmt, args...)
Definition: logging.h:369
gboolean services__nagios_agent_exists(const char *name)
#define NAGIOS_PLUGIN_DIR
Definition: config.h:485
#define crm_err(fmt, args...)
Definition: logging.h:363
#define CRM_ASSERT(expr)
Definition: results.h:42
GList * services__list_nagios_agents(void)
#define pcmk_ok
Definition: results.h:67
char * name
Definition: pcmk_fence.c:30
char * crm_strdup_printf(char const *format,...) __attribute__((__format__(__printf__
#define crm_info(fmt, args...)
Definition: logging.h:366
#define NAGIOS_METADATA_DIR
Definition: config.h:482
enum crm_ais_msg_types type
Definition: internal.h:83