mach/fprintf_stderr.c

   1 /*
   2  * @OSF_FREE_COPYRIGHT@
   3  *
   4  */
   5
   6 #include <mach/mach.h>
   7 #include <mach/mach_init.h>
   8 #include <stdio.h>
   9 #include <stdarg.h>
  10
  11 int (*vprintf_stderr_func)(const char *format, va_list ap);
  12
  13
  14 /* This function allows the writing of a mach error message to an
  15  * application-controllable output method, the default being to
  16  * use printf if no other method is specified by the application.
  17  *
  18  * To override, set the global (static) function pointer vprintf_stderr to
  19  * a function which takes the same parameters as vprintf.
  20  */
  21
  22 int fprintf_stderr(const char *format, ...)
  23 {
  24         va_list args;
  25         int retval;
  26
  27         va_start(args, format);
  28         if (vprintf_stderr_func == NULL)
  29                 retval = vprintf(format, args);
  30         else
  31                 retval = (*vprintf_stderr_func)(format, args);
  32         va_end(args);
  33
  34         return retval;
  35 }