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, Boston, MA 02111-1307, USA.  */
  19
  20 #include "server.h"
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 /* Generally useful subroutines used throughout the program.  */
  25
  26 /* Print the system error message for errno, and also mention STRING
  27    as the file name for which the error was encountered.
  28    Then return to command level.  */
  29
  30 void
  31 perror_with_name (string)
  32      char *string;
  33 {
  34   extern int sys_nerr;
  35   extern char *sys_errlist[];
  36   extern int errno;
  37   char *err;
  38   char *combined;
  39
  40   if (errno < sys_nerr)
  41     err = sys_errlist[errno];
  42   else
  43     err = "unknown error";
  44
  45   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  46   strcpy (combined, string);
  47   strcat (combined, ": ");
  48   strcat (combined, err);
  49
  50   error ("%s.", combined);
  51 }
  52
  53 /* Print an error message and return to command level.
  54    STRING is the error message, used as a fprintf string,
  55    and ARG is passed as an argument to it.  */
  56
  57 #ifdef ANSI_PROTOTYPES
  58 NORETURN void
  59 error (const char *string, ...)
  60 #else
  61 void
  62 error (va_alist)
  63      va_dcl
  64 #endif
  65 {
  66   extern jmp_buf toplevel;
  67   va_list args;
  68 #ifdef ANSI_PROTOTYPES
  69   va_start (args, string);
  70 #else
  71   va_start (args);
  72 #endif
  73   fflush (stdout);
  74 #ifdef ANSI_PROTOTYPES
  75   vfprintf (stderr, string, args);
  76 #else
  77   {
  78     char *string1;
  79
  80     string1 = va_arg (args, char *);
  81     vfprintf (stderr, string1, args);
  82   }
  83 #endif
  84   fprintf (stderr, "\n");
  85   longjmp(toplevel, 1);
  86 }
  87
  88 /* Print an error message and exit reporting failure.
  89    This is for a error that we cannot continue from.
  90    STRING and ARG are passed to fprintf.  */
  91
  92 /* VARARGS */
  93 NORETURN void
  94 #ifdef ANSI_PROTOTYPES
  95 fatal (char *string, ...)
  96 #else
  97 fatal (va_alist)
  98      va_dcl
  99 #endif
 100 {
 101   va_list args;
 102 #ifdef ANSI_PROTOTYPES
 103   va_start (args, string);
 104 #else
 105   char *string;
 106   va_start (args);
 107   string = va_arg (args, char *);
 108 #endif
 109   fprintf (stderr, "gdb: ");
 110   vfprintf (stderr, string, args);
 111   fprintf (stderr, "\n");
 112   va_end (args);
 113   exit (1);
 114 }