app/die.h

   1 /*
   2  * Lightweight Autonomic Network Architecture
   3  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   4  * Swiss federal institute of technology (ETH Zurich)
   5  * Subject to the GPL.
   6  */
   7
   8 #ifndef DIE_H
   9 #define DIE_H
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <stdarg.h>
  14 #include <string.h>
  15 #include <errno.h>
  16 #include <syslog.h>
  17
  18 #include "compiler.h"
  19
  20 static inline void error_and_die(int status, char *msg, ...)
  21 {
  22         va_list vl;
  23         va_start(vl, msg);
  24         vfprintf(stderr, msg, vl);
  25         va_end(vl);
  26         exit(status);
  27 }
  28
  29 static inline void die(void)
  30 {
  31         exit(EXIT_FAILURE);
  32 }
  33
  34 static inline void panic(char *msg, ...)
  35 {
  36         va_list vl;
  37         va_start(vl, msg);
  38         vfprintf(stderr, msg, vl);
  39         va_end(vl);
  40         die();
  41 }
  42
  43 #define syslog_panic(msg...)            \
  44 do {                                    \
  45         syslog(LOG_ERR, ##msg);         \
  46         die();                          \
  47 } while (0)
  48
  49 static inline void whine(char *msg, ...)
  50 {
  51         va_list vl;
  52         va_start(vl, msg);
  53         vfprintf(stderr, msg, vl);
  54         va_end(vl);
  55 }
  56
  57 #define syslog_whine(msg...)            \
  58 do {                                    \
  59         syslog(LOG_WARNING, ##msg);     \
  60 } while (0)
  61
  62 static inline void info(char *msg, ...)
  63 {
  64         va_list vl;
  65         va_start(vl, msg);
  66         vfprintf(stdout, msg, vl);
  67         va_end(vl);
  68 }
  69
  70 #define syslog_info(msg...)             \
  71 do {                                    \
  72         syslog(LOG_INFO, ##msg);        \
  73 } while (0)
  74
  75 static inline void BUG(char *msg, ...)
  76 {
  77         va_list vl;
  78         whine("BUG: ");
  79         va_start(vl, msg);
  80         vfprintf(stderr, msg, vl);
  81         va_end(vl);
  82         die();
  83 }
  84
  85 static inline void BUG_ON(int cond, char *msg, ...)
  86 {
  87         va_list vl;
  88         if (unlikely(cond)) {
  89                 whine("BUG: ");
  90                 va_start(vl, msg);
  91                 vfprintf(stderr, msg, vl);
  92                 va_end(vl);
  93                 die();
  94         }
  95 }
  96
  97 #ifdef _DEBUG_
  98 static inline void debug(char *msg, ...)
  99 {
 100         va_list vl;
 101         va_start(vl, msg);
 102         vfprintf(stderr, msg, vl);
 103         va_end(vl);
 104         fflush(stderr);
 105 }
 106 #else
 107 static inline void debug(char *msg, ...)
 108 {
 109         /* NOP */
 110 }
 111 #endif /* _DEBUG_ */
 112 #endif /* DIE_H */