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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* General fatal signal handling code for SDL */
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29
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30 #ifdef NO_SIGNAL_H
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31
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32 /* No signals on this platform, nothing to do.. */
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33
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34 void SDL_InstallParachute(void)
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35 {
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36 return;
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37 }
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38
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39 void SDL_UninstallParachute(void)
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40 {
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41 return;
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42 }
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43
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44 #else
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45
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46 #include <stdlib.h>
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47 #include <stdio.h>
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48 #include <signal.h>
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49 #include <string.h>
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50
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51 #include "SDL.h"
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52 #include "SDL_fatal.h"
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53
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54 /* This installs some signal handlers for the more common fatal signals,
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55 so that if the programmer is lazy, the app doesn't die so horribly if
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56 the program crashes.
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57 */
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58
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59 static void SDL_Parachute(int sig)
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60 {
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61 signal(sig, SIG_DFL);
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62 fprintf(stderr, "Fatal signal: ");
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63 switch (sig) {
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64 case SIGSEGV:
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65 fprintf(stderr, "Segmentation Fault");
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66 break;
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67 #ifdef SIGBUS
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68 #if SIGBUS != SIGSEGV
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69 case SIGBUS:
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70 fprintf(stderr, "Bus Error");
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71 break;
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72 #endif
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73 #endif /* SIGBUS */
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74 #ifdef SIGFPE
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75 case SIGFPE:
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76 fprintf(stderr, "Floating Point Exception");
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77 break;
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78 #endif /* SIGFPE */
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79 #ifdef SIGQUIT
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80 case SIGQUIT:
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81 fprintf(stderr, "Keyboard Quit");
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82 break;
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83 #endif /* SIGQUIT */
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84 #ifdef SIGPIPE
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85 case SIGPIPE:
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86 fprintf(stderr, "Broken Pipe");
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87 break;
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88 #endif /* SIGPIPE */
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89 default:
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90 fprintf(stderr, "# %d", sig);
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91 break;
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92 }
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93 fprintf(stderr, " (SDL Parachute Deployed)\n");
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94 SDL_Quit();
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95 exit(-sig);
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96 }
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97
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98 static int SDL_fatal_signals[] = {
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99 SIGSEGV,
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100 #ifdef SIGBUS
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101 SIGBUS,
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102 #endif
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103 #ifdef SIGFPE
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104 SIGFPE,
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105 #endif
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106 #ifdef SIGQUIT
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107 SIGQUIT,
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108 #endif
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109 #ifdef SIGPIPE
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110 SIGPIPE,
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111 #endif
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112 0
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113 };
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114
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115 void SDL_InstallParachute(void)
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116 {
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117 int i;
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118 void (*ohandler)(int);
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119
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120 /* Set a handler for any fatal signal not already handled */
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121 for ( i=0; SDL_fatal_signals[i]; ++i ) {
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122 ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
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123 if ( ohandler != SIG_DFL ) {
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124 signal(SDL_fatal_signals[i], ohandler);
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125 }
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126 }
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127 #ifdef SIGALRM
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128 /* Set SIGALRM to be ignored -- necessary on Solaris */
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129 {
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130 struct sigaction action, oaction;
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131
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132 /* Set SIG_IGN action */
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133 memset(&action, 0, (sizeof action));
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134 action.sa_handler = SIG_IGN;
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135 sigaction(SIGALRM, &action, &oaction);
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136
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137 /* Reset original action if it was already being handled */
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138 if ( oaction.sa_handler != SIG_DFL ) {
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139 sigaction(SIGALRM, &oaction, NULL);
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140 }
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141 }
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142 #endif
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143 return;
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144 }
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145
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146 void SDL_UninstallParachute(void)
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147 {
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148 int i;
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149 void (*ohandler)(int);
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150
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151 /* Remove a handler for any fatal signal handled */
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152 for ( i=0; SDL_fatal_signals[i]; ++i ) {
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153 ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
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154 if ( ohandler != SDL_Parachute ) {
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155 signal(SDL_fatal_signals[i], ohandler);
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156 }
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157 }
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158 }
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159
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160 #endif /* NO_SIGNAL_H */
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