logging.h

   1 #ifndef MODINITTOOLS_LOGGING_H
   2 #define MODINITTOOLS_LOGGING_H
   3
   4 /* Do we use syslog for messages or stderr? */
   5 extern int logging;
   6
   7 /* Do we want to silently drop all warnings? */
   8 extern int quiet;
   9
  10 /* Do we want informative messages as well as errors? */
  11 extern int verbose;
  12
  13 #ifdef __GNUC__
  14 #define _printf __attribute__((format(printf, 1, 2)))
  15 #else
  16 #define _printf
  17 #endif
  18
  19 extern void _printf fatal(const char *fmt, ...);
  20 extern void _printf error(const char *fmt, ...);
  21 extern void _printf warn(const char *fmt, ...);
  22 extern void _printf info(const char *fmt, ...);
  23
  24 typedef void _printf (*errfn_t)(const char *fmt, ...);
  25
  26 static inline void grammar(const char *cmd,
  27                            const char *filename, unsigned int line)
  28 {
  29         warn("%s line %u: ignoring bad line starting with '%s'\n",
  30              filename, line, cmd);
  31 }
  32
  33 #define NOFAIL(ptr)  do_nofail((ptr), __FILE__, __LINE__, #ptr)
  34
  35 #define nofail_asprintf(ptr, ...)                               \
  36         do { if (asprintf((ptr), __VA_ARGS__) < 0)              \
  37                 do_nofail(NULL, __FILE__, __LINE__, #ptr);      \
  38         } while(0)
  39
  40 static inline void *do_nofail(void *ptr, const char *file, int line, const char *expr)
  41 {
  42         if (!ptr) {
  43                 fatal("Memory allocation failure %s line %d: %s.\n",
  44                       file, line, expr);
  45         }
  46         return ptr;
  47 }
  48
  49 #endif /* MODINITTOOLS_LOGGING_H */