failures.h revision 7cecac4162776ac996a7cf3f4604bb5327d923d6
#ifndef FAILURES_H
#define FAILURES_H
struct ip_addr;
/* Default exit status codes that we could use. */
enum fatal_exit_status {
FATAL_LOGOPEN = 80, /* Can't open log file */
FATAL_LOGWRITE = 81, /* Can't write to log file */
FATAL_LOGERROR = 82, /* Internal logging error */
FATAL_OUTOFMEM = 83, /* Out of memory */
FATAL_EXEC = 84, /* exec() failed */
FATAL_DEFAULT = 89
};
enum log_type {
LOG_TYPE_DEBUG,
LOG_TYPE_INFO,
LOG_TYPE_WARNING,
LOG_TYPE_ERROR,
LOG_TYPE_FATAL,
LOG_TYPE_PANIC,
LOG_TYPE_COUNT,
LOG_TYPE_OPTION
};
struct failure_line {
pid_t pid;
enum log_type log_type;
const char *text;
};
struct failure_context {
enum log_type type;
int exit_status; /* for LOG_TYPE_FATAL */
const struct tm *timestamp; /* NULL = use time() + localtime() */
};
#define DEFAULT_FAILURE_STAMP_FORMAT "%b %d %H:%M:%S "
typedef void failure_callback_t(const struct failure_context *ctx,
const char *format, va_list args);
extern const char *failure_log_type_prefixes[];
extern const char *failure_log_type_names[];
void i_log_type(const struct failure_context *ctx, const char *format, ...)
ATTR_FORMAT(2, 3);
void i_panic(const char *format, ...) ATTR_FORMAT(1, 2) ATTR_NORETURN ATTR_COLD;
void i_fatal(const char *format, ...) ATTR_FORMAT(1, 2) ATTR_NORETURN ATTR_COLD;
void i_error(const char *format, ...) ATTR_FORMAT(1, 2) ATTR_COLD;
void i_warning(const char *format, ...) ATTR_FORMAT(1, 2);
void i_info(const char *format, ...) ATTR_FORMAT(1, 2);
void i_debug(const char *format, ...) ATTR_FORMAT(1, 2);
void i_fatal_status(int status, const char *format, ...)
ATTR_FORMAT(2, 3) ATTR_NORETURN ATTR_COLD;
/* Change failure handlers. */
#ifndef __cplusplus
void i_set_fatal_handler(failure_callback_t *callback ATTR_NORETURN);
#else
/* Older g++ doesn't like attributes in parameters */
void i_set_fatal_handler(failure_callback_t *callback);
#endif
void i_set_error_handler(failure_callback_t *callback);
void i_set_info_handler(failure_callback_t *callback);
void i_set_debug_handler(failure_callback_t *callback);
void i_get_failure_handlers(failure_callback_t **fatal_callback_r,
failure_callback_t **error_callback_r,
failure_callback_t **info_callback_r,
failure_callback_t **debug_callback_r);
/* Send failures to file. */
void default_fatal_handler(const struct failure_context *ctx,
const char *format, va_list args)
ATTR_NORETURN ATTR_FORMAT(2, 0);
void default_error_handler(const struct failure_context *ctx,
const char *format, va_list args)
ATTR_FORMAT(2, 0);
/* Send failures to syslog() */
void i_syslog_fatal_handler(const struct failure_context *ctx,
const char *format, va_list args)
ATTR_NORETURN ATTR_FORMAT(2, 0);
void i_syslog_error_handler(const struct failure_context *ctx,
const char *format, va_list args)
ATTR_FORMAT(2, 0);
/* Open syslog and set failure/info/debug handlers to use it. */
void i_set_failure_syslog(const char *ident, int options, int facility);
/* Send failures to specified log file instead of stderr. */
void i_set_failure_file(const char *path, const char *prefix);
/* Send errors to stderr using internal error protocol. */
void i_set_failure_internal(void);
/* If writing to log fails, ignore it instead of existing with
FATAL_LOGWRITE or FATAL_LOGERROR. */
void i_set_failure_ignore_errors(bool ignore);
/* Send informational messages to specified log file. i_set_failure_*()
functions modify the info file too, so call this function after them. */
void i_set_info_file(const char *path);
/* Send debug-level message to the given log file. The i_set_info_file()
function modifies also the debug log file, so call this function after it. */
void i_set_debug_file(const char *path);
/* Set the failure prefix. */
void i_set_failure_prefix(const char *prefix);
/* Prefix failures with a timestamp. fmt is in strftime() format. */
void i_set_failure_timestamp_format(const char *fmt);
/* When logging with internal error protocol, update the process's current
IP address / log prefix by sending it to log process. This is mainly used to
improve the error message if the process crashes. */
void i_set_failure_send_ip(const struct ip_addr *ip);
void i_set_failure_send_prefix(const char *prefix);
/* Call the callback before exit()ing. The callback may update the status. */
void i_set_failure_exit_callback(void (*callback)(int *status));
/* Call the exit callback and exit() */
void failure_exit(int status) ATTR_NORETURN ATTR_COLD;
/* Parse a line logged using internal failure handler */
void i_failure_parse_line(const char *line, struct failure_line *failure);
void failures_deinit(void);
#endif