src/tools/entab/halt.c

   1 /*
   2 **
   3 **              halt.c
   4 **
   5 ** $PostgreSQL$
   6 **
   7 **              This is used to print out error messages and exit
   8 */
   9
  10 #include <stdarg.h>
  11 #include <signal.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <errno.h>
  15
  16
  17 /*-------------------------------------------------------------------------
  18 **
  19 **              halt - print error message, and call clean up routine or exit
  20 **
  21 **------------------------------------------------------------------------*/
  22
  23 /*VARARGS*/
  24 void
  25 halt(const char *format,...)
  26 {
  27         va_list         arg_ptr;
  28         const char *pstr;
  29         void            (*sig_func) ();
  30
  31         va_start(arg_ptr, format);
  32         if (strncmp(format, "PERROR", 6) != 0)
  33                 vfprintf(stderr, format, arg_ptr);
  34         else
  35         {
  36                 for (pstr = format + 6; *pstr == ' ' || *pstr == ':'; pstr++)
  37                         ;
  38                 vfprintf(stderr, pstr, arg_ptr);
  39                 perror("");
  40         }
  41         va_end(arg_ptr);
  42         fflush(stderr);
  43
  44         /* call one clean up function if defined */
  45         if ((sig_func = signal(SIGTERM, SIG_DFL)) != SIG_DFL &&
  46                 sig_func != SIG_IGN)
  47                 (*sig_func) (0);
  48         else if ((sig_func = signal(SIGHUP, SIG_DFL)) != SIG_DFL &&
  49                          sig_func != SIG_IGN)
  50                 (*sig_func) (0);
  51         else if ((sig_func = signal(SIGINT, SIG_DFL)) != SIG_DFL &&
  52                          sig_func != SIG_IGN)
  53                 (*sig_func) (0);
  54         else if ((sig_func = signal(SIGQUIT, SIG_DFL)) != SIG_DFL &&
  55                          sig_func != SIG_IGN)
  56                 (*sig_func) (0);
  57         exit(1);
  58 }