nagios-plugins/lib/utils_base.h

#ifndef NAGIOS_UTILS_BASE_H_INCLUDED
#define NAGIOS_UTILS_BASE_H_INCLUDED
/* Header file for nagios plugins utils_base.c */

#include "sha1.h"

/* This file holds header information for thresholds - use this in preference to 
   individual plugin logic */

/* This has not been merged with utils.h because of problems with
   timeout_interval when other utils_*.h files use utils.h */

/* Long term, add new functions to utils_base.h for common routines
   and utils_*.h for specific to plugin routines. If routines are
   placed in utils_*.h, then these can be tested with libtap */

#define OUTSIDE 0
#define INSIDE  1

typedef struct range_struct {
	double	start;
	int	start_infinity;		/* FALSE (default) or TRUE */
	double	end;
	int	end_infinity;
	int	alert_on;		/* OUTSIDE (default) or INSIDE */
	} range;

typedef struct thresholds_struct {
	range	*warning;
	range	*critical;
	char    *warning_string;
	char    *critical_string;
	} thresholds;

#define NP_STATE_FORMAT_VERSION 1

typedef struct state_data_struct {
	time_t	time;
	void	*data;
	int	length; /* Of binary data */
	} state_data;


typedef struct state_key_struct {
	char       *name;
	char       *plugin_name;
	int        data_version;
	char       *_filename;
	state_data *state_data;
	} state_key;

typedef struct np_struct {
	char      *plugin_name;
	state_key *state;
	int       argc;
	char      **argv;
	} nagios_plugin;

range *parse_range_string (char *);
int _set_thresholds(thresholds **, char *, char *);
void set_thresholds(thresholds **, char *, char *);
void print_thresholds(const char *, thresholds *);
int check_range(double, range *);
int get_status(double, thresholds *);

/* All possible characters in a threshold range */
#define NP_THRESHOLDS_CHARS "-0123456789.:@~"

char *np_escaped_string (const char *);

void die (int, const char *, ...) __attribute__((noreturn,format(printf, 2, 3)));

/* Return codes for _set_thresholds */
#define NP_RANGE_UNPARSEABLE 1
#define NP_WARN_WITHIN_CRIT 2

/* a simple check to see if we're running as root.  
 * returns zero on failure, nonzero on success */
int np_check_if_root(void);
/* and a helpful wrapper around that.  it returns the same status
 * code from the above function, in case it's helpful for testing */
int np_warn_if_not_root(void);

/*
 * Read a string representing a state (ok, warning... or numeric: 0, 1) and
 * return the corresponding NP_STATE or ERROR)
 */
int translate_state (char *);

/*
 * Extract the value from key/value pairs, or return NULL. The value returned
 * can be free()ed.
 * This function can be used to parse NTP control packet data and performance
 * data strings.
 */
char *np_extract_value(const char*, const char*, char);

/*
 * Same as np_extract_value with separator suitable for NTP control packet
 * payloads (comma)
 */
#define np_extract_ntpvar(l, n) np_extract_value(l, n, ',')


void np_enable_state(char *, int);
state_data *np_state_read();
void np_state_write_string(time_t, char *);

void np_init(char *, int argc, char **argv);
void np_set_args(int argc, char **argv);
void np_cleanup();

/* np_suid() returns true if the real and effective uids differs, such as when
+ * running a suid plugin */
#define np_suid() (getuid() != geteuid())

#endif /* NAGIOS_UTILS_BASE_H_INCLUDED */