release/src/router/pptp-client/util.h

   1 /* util.h ....... error message utilities.
   2  *                C. Scott Ananian <cananian@alumni.princeton.edu>
   3  *
   4  * $Id: util.h,v 1.6 2005/03/10 01:18:20 quozl Exp $
   5  */
   6
   7 #ifndef INC_UTIL_H
   8 #define INC_UTIL_H
   9
  10 /* log_string is an identifier for this pptp process, passed from
  11    command line using --log-string=X, and included with every log message.
  12    Useful for people with multiple pptp sessions open at a time */
  13 extern char * log_string;
  14
  15 /* log_level sets the logging verbosity. Values range from 0 (errors only)
  16    to 1 (errors and warnings) to 2 (high verbosity, for debugging) */
  17 extern int    log_level;
  18
  19 void _log(const char *func, const char *file, int line, const char *format, ...)
  20      __attribute__ ((format (printf, 4, 5)));
  21 void _warn(const char *func, const char *file, int line, const char *format, ...)
  22      __attribute__ ((format (printf, 4, 5)));
  23 void _fatal(const char *func, const char *file, int line, const char *format, ...)
  24      __attribute__ ((format (printf, 4, 5))) __attribute__ ((noreturn));
  25
  26 #define log(format, args...) \
  27         _log(__FUNCTION__,__FILE__,__LINE__, format , ## args)
  28 #define warn(format, args...) \
  29         _warn(__FUNCTION__,__FILE__,__LINE__, format , ## args)
  30 #define fatal(format, args...) \
  31         _fatal(__FUNCTION__,__FILE__,__LINE__, format , ## args)
  32
  33 int file2fd(const char *path, const char *mode, int fd);
  34
  35 /* signal to pipe delivery implementation */
  36
  37 /* create a signal pipe, returns 0 for success, -1 with errno for failure */
  38 int sigpipe_create();
  39
  40 /* generic handler for signals, writes signal number to pipe */
  41 void sigpipe_handler(int signum);
  42
  43 /* assign a signal number to the pipe */
  44 void sigpipe_assign(int signum);
  45
  46 /* return the signal pipe read file descriptor for select(2) */
  47 int sigpipe_fd();
  48
  49 /* read and return the pending signal from the pipe */
  50 int sigpipe_read();
  51
  52 void sigpipe_close();
  53
  54 #endif /* INC_UTIL_H */