gdb/gdbserver/utils.c

   1 /* General utility routines for the remote server for GDB.
   2    Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "server.h"
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 /* Generally useful subroutines used throughout the program.  */
  26
  27 /* Print the system error message for errno, and also mention STRING
  28    as the file name for which the error was encountered.
  29    Then return to command level.  */
  30
  31 void
  32 perror_with_name (string)
  33      char *string;
  34 {
  35   extern int sys_nerr;
  36   extern char *sys_errlist[];
  37   extern int errno;
  38   char *err;
  39   char *combined;
  40
  41   if (errno < sys_nerr)
  42     err = sys_errlist[errno];
  43   else
  44     err = "unknown error";
  45
  46   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  47   strcpy (combined, string);
  48   strcat (combined, ": ");
  49   strcat (combined, err);
  50
  51   error ("%s.", combined);
  52 }
  53
  54 /* Print an error message and return to command level.
  55    STRING is the error message, used as a fprintf string,
  56    and ARG is passed as an argument to it.  */
  57
  58 #ifdef ANSI_PROTOTYPES
  59 NORETURN void
  60 error (const char *string,...)
  61 #else
  62 void
  63 error (va_alist)
  64      va_dcl
  65 #endif
  66 {
  67   extern jmp_buf toplevel;
  68   va_list args;
  69 #ifdef ANSI_PROTOTYPES
  70   va_start (args, string);
  71 #else
  72   va_start (args);
  73 #endif
  74   fflush (stdout);
  75 #ifdef ANSI_PROTOTYPES
  76   vfprintf (stderr, string, args);
  77 #else
  78   {
  79     char *string1;
  80
  81     string1 = va_arg (args, char *);
  82     vfprintf (stderr, string1, args);
  83   }
  84 #endif
  85   fprintf (stderr, "\n");
  86   longjmp (toplevel, 1);
  87 }
  88
  89 /* Print an error message and exit reporting failure.
  90    This is for a error that we cannot continue from.
  91    STRING and ARG are passed to fprintf.  */
  92
  93 /* VARARGS */
  94 NORETURN void
  95 #ifdef ANSI_PROTOTYPES
  96 fatal (char *string,...)
  97 #else
  98 fatal (va_alist)
  99      va_dcl
 100 #endif
 101 {
 102   va_list args;
 103 #ifdef ANSI_PROTOTYPES
 104   va_start (args, string);
 105 #else
 106   char *string;
 107   va_start (args);
 108   string = va_arg (args, char *);
 109 #endif
 110   fprintf (stderr, "gdb: ");
 111   vfprintf (stderr, string, args);
 112   fprintf (stderr, "\n");
 113   va_end (args);
 114   exit (1);
 115 }