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1 // sighandlers.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <signal.h> |
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29 |
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30 #include "sighandlers.h" |
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31 #include "octave.h" |
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32 #include "error.h" |
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33 #include "utils.h" |
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34 |
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35 // Nonzero means we have already printed a message for this series of |
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36 // SIGPIPES. We assume that the writer will eventually give up. |
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37 int pipe_handler_error_count = 0; |
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38 |
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39 // Nonzero means we can be interrupted. |
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40 int can_interrupt = 0; |
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41 |
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42 static void |
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43 my_friendly_exit (const char *sig_name, int sig_number) |
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44 { |
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45 error ("caught %s -- stopping myself...", sig_name); |
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46 clean_up_and_exit (sig_number); |
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47 } |
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48 |
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49 /* |
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50 * Some of these may eventually perform different actions... |
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51 */ |
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52 |
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53 static RETSIGTYPE |
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54 sigabrt_handler (int i) |
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55 { |
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56 my_friendly_exit ("SIGABRT", i); |
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57 } |
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58 |
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59 static RETSIGTYPE |
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60 sigalrm_handler (int i) |
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61 { |
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62 my_friendly_exit ("SIGALRM", i); |
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63 } |
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64 |
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65 static RETSIGTYPE |
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66 sigbus_handler (int i) |
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67 { |
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68 my_friendly_exit ("SIGBUS", i); |
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69 } |
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70 |
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71 static RETSIGTYPE |
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72 sigemt_handler (int i) |
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73 { |
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74 my_friendly_exit ("SIGEMT", i); |
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75 } |
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76 |
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77 static RETSIGTYPE |
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78 sigfpe_handler (int i) |
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79 { |
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80 my_friendly_exit ("SIGFPE", i); |
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81 } |
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82 |
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83 static RETSIGTYPE |
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84 sighup_handler (int i) |
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85 { |
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86 my_friendly_exit ("SIGHUP", i); |
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87 } |
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88 |
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89 static RETSIGTYPE |
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90 sigill_handler (int i) |
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91 { |
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92 my_friendly_exit ("SIGILL", i); |
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93 } |
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94 |
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95 /* |
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96 * Handle SIGINT by restarting the parser (see octave.cc). |
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97 */ |
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98 static RETSIGTYPE |
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99 sigint_handler (int i) |
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100 { |
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101 if (can_interrupt) |
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102 { |
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103 jump_to_top_level (); |
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104 panic_impossible (); |
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105 } |
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106 |
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107 #if RETSIGTYPE == void |
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108 return; |
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109 #else |
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110 return 0; |
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111 #endif |
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112 } |
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113 |
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114 static RETSIGTYPE |
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115 sigiot_handler (int i) |
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116 { |
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117 my_friendly_exit ("SIGIOT", i); |
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118 } |
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119 |
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120 static RETSIGTYPE |
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121 siglost_handler (int i) |
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122 { |
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123 my_friendly_exit ("SIGLOST", i); |
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124 } |
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125 |
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126 static RETSIGTYPE |
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127 sigpipe_handler (int i) |
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128 { |
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129 if (pipe_handler_error_count++ == 0) |
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130 message (0, "broken pipe"); |
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131 |
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132 // Don\'t loop forever on account of this. |
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133 if (pipe_handler_error_count > 100) |
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134 jump_to_top_level (); |
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135 |
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136 #if RETSIGTYPE == void |
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137 return; |
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138 #else |
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139 return 0; |
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140 #endif |
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141 } |
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142 |
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143 static RETSIGTYPE |
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144 sigpoll_handler (int i) |
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145 { |
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146 my_friendly_exit ("SIGPOLL", i); |
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147 } |
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148 |
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149 static RETSIGTYPE |
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150 sigprof_handler (int i) |
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151 { |
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152 my_friendly_exit ("SIGPROF", i); |
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153 } |
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154 |
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155 static RETSIGTYPE |
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156 sigquit_handler (int i) |
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157 { |
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158 my_friendly_exit ("SIGQUIT", i); |
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159 } |
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160 |
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161 static RETSIGTYPE |
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162 sigsegv_handler (int i) |
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163 { |
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164 my_friendly_exit ("SIGSEGV", i); |
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165 } |
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166 |
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167 static RETSIGTYPE |
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168 sigsys_handler (int i) |
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169 { |
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170 my_friendly_exit ("SIGSYS", i); |
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171 } |
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172 |
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173 static RETSIGTYPE |
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174 sigterm_handler (int i) |
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175 { |
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176 my_friendly_exit ("SIGTERM", i); |
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177 } |
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178 |
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179 static RETSIGTYPE |
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180 sigtrap_handler (int i) |
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181 { |
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182 my_friendly_exit ("SIGTRAP", i); |
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183 } |
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184 |
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185 static RETSIGTYPE |
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186 sigusr1_handler (int i) |
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187 { |
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188 my_friendly_exit ("SIGUSR1", i); |
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189 } |
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190 |
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191 static RETSIGTYPE |
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192 sigusr2_handler (int i) |
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193 { |
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194 my_friendly_exit ("SIGUSR2", i); |
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195 } |
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196 |
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197 static RETSIGTYPE |
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198 sigvtalrm_handler (int i) |
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199 { |
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200 my_friendly_exit ("SIGVTALRM", i); |
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201 } |
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202 |
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203 static RETSIGTYPE |
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204 sigxcpu_handler (int i) |
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205 { |
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206 my_friendly_exit ("SIGXCPU", i); |
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207 } |
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208 |
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209 static RETSIGTYPE |
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210 sigxfsz_handler (int i) |
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211 { |
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212 my_friendly_exit ("SIGXFSZ", i); |
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213 } |
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214 |
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215 /* |
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216 * Install all the handlers for the signals we might care about. |
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217 */ |
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218 void |
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219 install_signal_handlers (void) |
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220 { |
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221 #ifdef SIGABRT |
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222 signal (SIGABRT, sigabrt_handler); |
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223 #endif |
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224 |
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225 #ifdef SIGALRM |
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226 signal (SIGALRM, sigalrm_handler); |
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227 #endif |
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228 |
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229 #ifdef SIGBUS |
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230 signal (SIGBUS, sigbus_handler); |
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231 #endif |
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232 |
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233 #ifdef SIGEMT |
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234 signal (SIGEMT, sigemt_handler); |
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235 #endif |
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236 |
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237 #ifdef SIGFPE |
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238 signal (SIGFPE, sigfpe_handler); |
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239 #endif |
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240 |
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241 #ifdef SIGHUP |
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242 signal (SIGHUP, sighup_handler); |
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243 #endif |
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244 |
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245 #ifdef SIGILL |
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246 signal (SIGILL, sigill_handler); |
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247 #endif |
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248 |
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249 #ifdef SIGINT |
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250 signal (SIGINT, sigint_handler); |
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251 #endif |
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252 |
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253 #ifdef SIGIOT |
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254 signal (SIGIOT, sigiot_handler); |
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255 #endif |
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256 |
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257 #ifdef SIGLOST |
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258 signal (SIGLOST, siglost_handler); |
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259 #endif |
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260 |
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261 #ifdef SIGPIPE |
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262 signal (SIGPIPE, sigpipe_handler); |
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263 #endif |
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264 |
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265 #ifdef SIGPOLL |
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266 signal (SIGPOLL, sigpoll_handler); |
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267 #endif |
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268 |
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269 #ifdef SIGPROF |
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270 signal (SIGPROF, sigprof_handler); |
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271 #endif |
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272 |
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273 #ifdef SIGQUIT |
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274 signal (SIGQUIT, sigquit_handler); |
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275 #endif |
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276 |
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277 #ifdef SIGSEGV |
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278 signal (SIGSEGV, sigsegv_handler); |
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279 #endif |
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280 |
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281 #ifdef SIGSYS |
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282 signal (SIGSYS, sigsys_handler); |
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283 #endif |
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284 |
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285 #ifdef SIGTERM |
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286 signal (SIGTERM, sigterm_handler); |
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287 #endif |
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288 |
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289 #ifdef SIGTRAP |
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290 signal (SIGTRAP, sigtrap_handler); |
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291 #endif |
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292 |
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293 #ifdef SIGUSR1 |
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294 signal (SIGUSR1, sigusr1_handler); |
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295 #endif |
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296 |
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297 #ifdef SIGUSR2 |
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298 signal (SIGUSR2, sigusr2_handler); |
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299 #endif |
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300 |
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301 #ifdef SIGVTALRM |
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302 signal (SIGVTALRM, sigvtalrm_handler); |
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303 #endif |
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304 |
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305 #ifdef SIGXCPU |
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306 signal (SIGXCPU, sigxcpu_handler); |
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307 #endif |
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308 |
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309 #ifdef SIGXFSZ |
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310 signal (SIGXFSZ, sigxfsz_handler); |
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311 #endif |
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312 } |
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313 |
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314 /* |
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315 ;;; Local Variables: *** |
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316 ;;; mode: C++ *** |
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317 ;;; page-delimiter: "^/\\*" *** |
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318 ;;; End: *** |
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319 */ |
