/*
 * util.h - routeup/tlsdated utility functions
 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef UTIL_H
#define UTIL_H

#include <errno.h>
#include <string.h>
#include <stdlib.h>

#define API __attribute__((visibility("default")))

#define IGNORE_EINTR(expr) ({ \
  typeof(expr) _r; \
  while ((_r = (expr)) == -1 && errno == EINTR); \
  _r; \
})

extern int verbose;
void die (const char *fmt, ...);
void verb (const char *fmt, ...);
extern void logat (int isverbose, const char *fmt, ...);

#ifdef NDEBUG
#  define _SUPPORT_DEBUG 0
#else
#  define _SUPPORT_DEBUG 1
#endif

#define debug(fmt, ...) do { \
  if (_SUPPORT_DEBUG) \
    logat(1, fmt, ## __VA_ARGS__); \
} while (0)

#define info(fmt, ...) logat(1, fmt, ## __VA_ARGS__)
#define pinfo(fmt, ...) logat(1, fmt ": %s", ## __VA_ARGS__, strerror(errno))
#define error(fmt, ...) logat(0, fmt, ## __VA_ARGS__)
#define perror(fmt, ...) logat(0, fmt ": %s", ## __VA_ARGS__, strerror(errno))
#define fatal(fmt, ...) do { logat(0, fmt, ## __VA_ARGS__); exit(1); } while (0)
#define pfatal(fmt, ...) do { \
  logat(0, fmt ": %s", ## __VA_ARGS__, strerror(errno)); \
  exit(1); \
} while (0)

static inline int min (int x, int y)
{
  return x < y ? x : y;
}

void drop_privs_to (const char *user, const char *group);
const char *sync_type_str (int sync_type);

struct state;
enum event_id_t;
void trigger_event (struct state *state, enum event_id_t e, int sec);

#endif /* !UTIL_H */