gdb/gdbserver/utils.c

   1 /* General utility routines for the remote server for GDB.
   2    Copyright (C) 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000, 2002, 2003,
   3    2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "server.h"
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #if HAVE_ERRNO_H
  27 #include <errno.h>
  28 #endif
  29 #if HAVE_MALLOC_H
  30 #include <malloc.h>
  31 #endif
  32
  33 /* Generally useful subroutines used throughout the program.  */
  34
  35 /* Print the system error message for errno, and also mention STRING
  36    as the file name for which the error was encountered.
  37    Then return to command level.  */
  38
  39 void
  40 perror_with_name (char *string)
  41 {
  42   const char *err;
  43   char *combined;
  44
  45   err = strerror (errno);
  46   if (err == NULL)
  47     err = "unknown error";
  48
  49   combined = (char *) alloca (strlen (err) + strlen (string) + 3);
  50   strcpy (combined, string);
  51   strcat (combined, ": ");
  52   strcat (combined, err);
  53
  54   error ("%s.", combined);
  55 }
  56
  57 /* Print an error message and return to command level.
  58    STRING is the error message, used as a fprintf string,
  59    and ARG is passed as an argument to it.  */
  60
  61 void
  62 error (const char *string,...)
  63 {
  64   extern jmp_buf toplevel;
  65   va_list args;
  66   va_start (args, string);
  67   fflush (stdout);
  68   vfprintf (stderr, string, args);
  69   fprintf (stderr, "\n");
  70   longjmp (toplevel, 1);
  71 }
  72
  73 /* Print an error message and exit reporting failure.
  74    This is for a error that we cannot continue from.
  75    STRING and ARG are passed to fprintf.  */
  76
  77 /* VARARGS */
  78 void
  79 fatal (const char *string,...)
  80 {
  81   va_list args;
  82   va_start (args, string);
  83   fprintf (stderr, "gdb: ");
  84   vfprintf (stderr, string, args);
  85   fprintf (stderr, "\n");
  86   va_end (args);
  87   exit (1);
  88 }
  89
  90 /* VARARGS */
  91 void
  92 warning (const char *string,...)
  93 {
  94   va_list args;
  95   va_start (args, string);
  96   fprintf (stderr, "gdb: ");
  97   vfprintf (stderr, string, args);
  98   fprintf (stderr, "\n");
  99   va_end (args);
 100 }