/**
* collectd - src/configfile.c
- * Copyright (C) 2005 Florian octo Forster
+ * Copyright (C) 2005,2006 Florian octo Forster
*
* 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
* Florian octo Forster <octo at verplant.org>
**/
-/*
- * FIXME:
- * - remove all (I mean *ALL*) calls to `fprintf': `stderr' will have been
- * closed.
- */
-
#include "collectd.h"
#include "libconfig/libconfig.h"
+#include "common.h"
#include "plugin.h"
#include "configfile.h"
+#include "network.h"
#include "utils_debug.h"
#define SHORTOPT_NONE 0
#define ERR_NEEDS_ARG "Section `%s' needs an argument.\n"
#define ERR_NEEDS_SECTION "`%s' can only be used within a section.\n"
-#ifdef HAVE_LIBRRD
+#define ESCAPE_NULL(str) ((str) == NULL ? "(null)" : (str))
+
+#define DEBUG_CALLBACK(shortvar, var, arguments, value) \
+ DBG("shortvar = %s, var = %s, arguments = %s, value = %s, ...", \
+ ESCAPE_NULL(shortvar), \
+ ESCAPE_NULL(var), \
+ ESCAPE_NULL(arguments), \
+ ESCAPE_NULL(value))
+
extern int operating_mode;
-#else
-static int operating_mode = MODE_LOCAL;
-#endif
typedef struct cf_callback
{
- char *type;
- int (*callback) (char *, char *);
- char **keys;
+ const char *type;
+ int (*callback) (const char *, const char *);
+ const char **keys;
int keys_num;
struct cf_callback *next;
} cf_callback_t;
static cf_callback_t *first_callback = NULL;
+typedef struct cf_mode_item
+{
+ char *key;
+ char *value;
+ int mode;
+} cf_mode_item_t;
+
+/* TODO
+ * - LogFile
+ */
+static cf_mode_item_t cf_mode_list[] =
+{
+ {"TimeToLive", NULL, MODE_CLIENT },
+ {"PIDFile", NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL | MODE_LOG },
+ {"DataDir", NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL | MODE_LOG },
+ {"LogFile", NULL, MODE_CLIENT | MODE_SERVER | MODE_LOCAL | MODE_LOG }
+};
+static int cf_mode_num = 4;
+
static int nesting_depth = 0;
static char *current_module = NULL;
-/* cf_register needs this prototype */
-int cf_callback_general (const char *, const char *, const char *,
- const char *, lc_flags_t, void *);
+/* `cf_register' needs this prototype */
+static int cf_callback_plugin_dispatch (const char *, const char *,
+ const char *, const char *, lc_flags_t, void *);
/*
- * Functions to handle register/unregister, search, ...
+ * Functions to handle register/unregister, search, and other plugin related
+ * stuff
*/
-cf_callback_t *cf_search (char *type)
+static cf_callback_t *cf_search (char *type)
{
cf_callback_t *cf_cb;
return (cf_cb);
}
-int cf_dispatch (char *type, const char *orig_key, const char *orig_value)
+static int cf_dispatch (char *type, const char *orig_key, const char *orig_value)
{
cf_callback_t *cf_cb;
char *key;
int ret;
int i;
+ DBG ("type = %s, key = %s, value = %s",
+ ESCAPE_NULL(type),
+ ESCAPE_NULL(orig_key),
+ ESCAPE_NULL(orig_value));
+
if ((cf_cb = cf_search (type)) == NULL)
{
- fprintf (stderr, "Plugin `%s' did not register a callback.\n", type);
+ syslog (LOG_WARNING, "Plugin `%s' did not register a callback.", type);
return (-1);
}
}
if (i >= cf_cb->keys_num)
- fprintf (stderr, "Plugin `%s' did not register for value `%s'.\n", type, key);
+ syslog (LOG_WARNING, "Plugin `%s' did not register for value `%s'.", type, key);
free (key);
free (value);
+ DBG ("return (%i)", ret);
+
return (ret);
}
-void cf_unregister (char *type)
+void cf_unregister (const char *type)
{
cf_callback_t *this, *prev;
}
}
-void cf_register (char *type,
- int (*callback) (char *, char *),
- char **keys, int keys_num)
+void cf_register (const char *type,
+ int (*callback) (const char *, const char *),
+ const char **keys, int keys_num)
{
cf_callback_t *cf_cb;
char buf[64];
* `key', but apparently `lc_register_*' can handle
* it.. */
lc_register_callback (buf, SHORTOPT_NONE,
- LC_VAR_STRING, cf_callback_general,
+ LC_VAR_STRING, cf_callback_plugin_dispatch,
NULL);
}
else
{
- DBG ("Key was truncated: `%s'", keys[i]);
+ DBG ("Key was truncated: `%s'", ESCAPE_NULL(keys[i]));
}
}
}
-/*
- * Functions for the actual parsing
+/*
+ * Other query functions
+ */
+char *cf_get_option (const char *key, char *def)
+{
+ int i;
+
+ for (i = 0; i < cf_mode_num; i++)
+ {
+ if ((cf_mode_list[i].mode & operating_mode) == 0)
+ continue;
+
+ if (strcasecmp (cf_mode_list[i].key, key) != 0)
+ continue;
+
+ if (cf_mode_list[i].value != NULL)
+ return (cf_mode_list[i].value);
+ return (def);
+ }
+
+ return (NULL);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Functions for the actual parsing *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * `cf_callback_mode'
+ * Chose the `operating_mode'
+ *
+ * Mode `value'
*/
-int cf_callback_general (const char *shortvar, const char *var,
+static int cf_callback_mode (const char *shortvar, const char *var,
const char *arguments, const char *value, lc_flags_t flags,
void *extra)
{
- DBG ("shortvar = %s, var = %s, arguments = %s, value = %s, ...",
- shortvar, var, arguments, value);
-
- if ((nesting_depth == 0) || (current_module == NULL))
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
+
+ if (strcasecmp (value, "Client") == 0)
+ operating_mode = MODE_CLIENT;
+#if HAVE_LIBRRD
+ else if (strcasecmp (value, "Server") == 0)
+ operating_mode = MODE_SERVER;
+ else if (strcasecmp (value, "Local") == 0)
+ operating_mode = MODE_LOCAL;
+#else /* !HAVE_LIBRRD */
+ else if (strcasecmp (value, "Server") == 0)
{
- fprintf (stderr, ERR_NEEDS_SECTION, shortvar);
+ fprintf (stderr, "Invalid mode `Server': "
+ "You need to link against librrd for this "
+ "mode to be available.\n");
+ syslog (LOG_ERR, "Invalid mode `Server': "
+ "You need to link against librrd for this "
+ "mode to be available.");
return (LC_CBRET_ERROR);
}
-
- /* Send the data to the plugin */
- if (cf_dispatch (current_module, shortvar, value) < 0)
+ else if (strcasecmp (value, "Local") == 0)
+ {
+ fprintf (stderr, "Invalid mode `Local': "
+ "You need to link against librrd for this "
+ "mode to be available.\n");
+ syslog (LOG_ERR, "Invalid mode `Local': "
+ "You need to link against librrd for this "
+ "mode to be available.");
return (LC_CBRET_ERROR);
+ }
+#endif
+ else if (strcasecmp (value, "Log") == 0)
+ operating_mode = MODE_LOG;
+ else
+ {
+ syslog (LOG_ERR, "Invalid value for config option `Mode': `%s'", value);
+ return (LC_CBRET_ERROR);
+ }
return (LC_CBRET_OKAY);
}
-int cf_callback_section_mode (const char *shortvar, const char *var,
+/*
+ * `cf_callback_mode_plugindir'
+ * Change the plugin directory
+ *
+ * <Mode xxx>
+ * PluginDir `value'
+ * </Mode>
+ */
+static int cf_callback_mode_plugindir (const char *shortvar, const char *var,
const char *arguments, const char *value, lc_flags_t flags,
void *extra)
{
- DBG ("shortvar = %s, var = %s, arguments = %s, value = %s, ...",
- shortvar, var, arguments, value);
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
- if (flags == LC_FLAGS_SECTIONSTART)
- {
- if (nesting_depth != 0)
- {
- fprintf (stderr, ERR_NOT_NESTED);
- return (LC_CBRET_ERROR);
- }
+ plugin_set_dir (value);
- if (arguments == NULL)
- {
- fprintf (stderr, ERR_NEEDS_ARG, shortvar);
- return (LC_CBRET_ERROR);
- }
+ return (LC_CBRET_OKAY);
+}
- nesting_depth++;
+static int cf_callback_mode_option (const char *shortvar, const char *var,
+ const char *arguments, const char *value, lc_flags_t flags,
+ void *extra)
+{
+ cf_mode_item_t *item;
- if (((operating_mode == MODE_CLIENT)
- && (strcasecmp (arguments, "Client") == 0))
- || ((operating_mode == MODE_SERVER)
- && (strcasecmp (arguments, "Server") == 0))
- || ((operating_mode == MODE_LOCAL)
- && (strcasecmp (arguments, "Local") == 0)))
- {
- return (LC_CBRET_OKAY);
- }
- else
- {
- return (LC_CBRET_IGNORESECTION);
- }
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
+
+ if (extra == NULL)
+ {
+ fprintf (stderr, "No extra..?\n");
+ return (LC_CBRET_ERROR);
}
- else if (flags == LC_FLAGS_SECTIONEND)
+
+ item = (cf_mode_item_t *) extra;
+
+ if (strcasecmp (item->key, shortvar))
{
- nesting_depth--;
+ fprintf (stderr, "Wrong extra..\n");
+ return (LC_CBRET_ERROR);
+ }
- return (LC_CBRET_OKAY);
+ if ((operating_mode & item->mode) == 0)
+ {
+ fprintf (stderr, "Option `%s' is not valid in this mode!\n", shortvar);
+ return (LC_CBRET_ERROR);
}
- else
+
+ if (item->value != NULL)
{
- fprintf (stderr, ERR_SECTION_ONLY, shortvar);
+ free (item->value);
+ item->value = NULL;
+ }
+
+ if ((item->value = strdup (value)) == NULL)
+ {
+ perror ("strdup");
return (LC_CBRET_ERROR);
}
+ return (LC_CBRET_OKAY);
+}
+
+/*
+ * `cf_callback_mode_loadmodule':
+ * Load a plugin.
+ *
+ * <Mode xxx>
+ * LoadPlugin `value'
+ * </Mode>
+ */
+static int cf_callback_mode_loadmodule (const char *shortvar, const char *var,
+ const char *arguments, const char *value, lc_flags_t flags,
+ void *extra)
+{
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
+
+ if (plugin_load (value))
+ syslog (LOG_ERR, "plugin_load (%s): failed to load plugin", value);
+
+ /* Return `okay' even if there was an error, because it's not a syntax
+ * problem.. */
+ return (LC_CBRET_OKAY);
}
-int cf_callback_section_module (const char *shortvar, const char *var,
+/*
+ * `cf_callback_plugin'
+ * Start/end section `plugin'
+ *
+ * <Plugin `arguments'>
+ * ...
+ * </Plugin>
+ */
+static int cf_callback_plugin (const char *shortvar, const char *var,
const char *arguments, const char *value, lc_flags_t flags,
void *extra)
{
- DBG ("shortvar = %s, var = %s, arguments = %s, value = %s, ...",
- shortvar, var, arguments, value);
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
if (flags == LC_FLAGS_SECTIONSTART)
{
if (current_module != NULL)
{
free (current_module);
- current_module == NULL;
+ current_module = NULL;
}
nesting_depth--;
}
}
-int cf_callback_loadmodule (const char *shortvar, const char *var,
+/*
+ * `cf_callback_plugin_dispatch'
+ * Send options within `plugin' sections to the plugin that requests it.
+ *
+ * <Plugin `current_module'>
+ * `var' `value'
+ * </Plugin>
+ */
+static int cf_callback_plugin_dispatch (const char *shortvar, const char *var,
const char *arguments, const char *value, lc_flags_t flags,
void *extra)
{
- DBG ("shortvar = %s, var = %s, arguments = %s, value = %s, ...",
- shortvar, var, arguments, value);
+ DEBUG_CALLBACK (shortvar, var, arguments, value);
- if (nesting_depth == 0)
+ if ((nesting_depth == 0) || (current_module == NULL))
{
fprintf (stderr, ERR_NEEDS_SECTION, shortvar);
return (LC_CBRET_ERROR);
}
- if (plugin_load (value))
- syslog (LOG_ERR, "plugin_load (%s): failed to load plugin", shortvar);
+ /* Send the data to the plugin */
+ if (cf_dispatch (current_module, shortvar, value) < 0)
+ return (LC_CBRET_ERROR);
- /* Return `okay' even if there was an error, because it's not a syntax
- * problem.. */
return (LC_CBRET_OKAY);
}
-int cf_read (char *filename)
+static void cf_init (void)
{
- if (filename == NULL)
- filename = CONFIGFILE;
+ static int run_once = 0;
+ int i;
- lc_register_callback ("Mode", SHORTOPT_NONE, LC_VAR_SECTION,
- cf_callback_section_mode, NULL);
+ if (run_once != 0)
+ return;
+ run_once = 1;
+
+ lc_register_callback ("Mode", SHORTOPT_NONE, LC_VAR_STRING,
+ cf_callback_mode, NULL);
lc_register_callback ("Plugin", SHORTOPT_NONE, LC_VAR_SECTION,
- cf_callback_section_module, NULL);
+ cf_callback_plugin, NULL);
- /*
- * TODO:
- * - Add more directives, such as `DefaultMode', `DataDir', `PIDFile', ...
- */
+ lc_register_callback ("PluginDir", SHORTOPT_NONE,
+ LC_VAR_STRING, cf_callback_mode_plugindir, NULL);
+ lc_register_callback ("LoadPlugin", SHORTOPT_NONE,
+ LC_VAR_STRING, cf_callback_mode_loadmodule, NULL);
- lc_register_callback ("Mode.LoadPlugin", SHORTOPT_NONE,
- LC_VAR_STRING, cf_callback_loadmodule,
- NULL);
+ for (i = 0; i < cf_mode_num; i++)
+ {
+ cf_mode_item_t *item;
+
+ item = &cf_mode_list[i];
+
+ lc_register_callback (item->key, SHORTOPT_NONE, LC_VAR_STRING,
+ cf_callback_mode_option, (void *) item);
+ }
+}
+int cf_read (char *filename)
+{
+ cf_init ();
+
+ if (filename == NULL)
+ filename = CONFIGFILE;
+
+ DBG ("Starting to parse file `%s'", filename);
+
+ /* int lc_process_file(const char *appname, const char *pathname, lc_conf_type_t type); */
if (lc_process_file ("collectd", filename, LC_CONF_APACHE))
{
syslog (LOG_ERR, "lc_process_file (%s): %s", filename, lc_geterrstr ());
return (-1);
}
+ DBG ("Done parsing file `%s'", filename);
+
/* free memory and stuff */
lc_cleanup ();
projects / collectd.git / blobdiff