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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1230
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24 #include <config.h> |
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1
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25 #endif |
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26 |
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2536
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27 #include <cstdlib> |
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28 |
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3503
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29 #include <iostream> |
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1344
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30 #include <new> |
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31 |
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1350
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32 #ifdef HAVE_UNISTD_H |
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2442
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33 #ifdef HAVE_SYS_TYPES_H |
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834
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34 #include <sys/types.h> |
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2442
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35 #endif |
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834
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36 #include <unistd.h> |
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37 #endif |
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1343
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38 |
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3281
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39 #include "cmd-edit.h" |
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4153
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40 #include "quit.h" |
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3281
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41 |
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4185
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42 #include "defun.h" |
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1352
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43 #include "error.h" |
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1373
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44 #include "load-save.h" |
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4294
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45 #include "oct-map.h" |
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2091
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46 #include "pager.h" |
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4185
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47 #include "pt-bp.h" |
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1
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48 #include "sighandlers.h" |
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4787
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49 #include "sysdep.h" |
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1352
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50 #include "syswait.h" |
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2091
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51 #include "toplev.h" |
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1
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52 #include "utils.h" |
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53 |
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54 // Nonzero means we have already printed a message for this series of |
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55 // SIGPIPES. We assume that the writer will eventually give up. |
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56 int pipe_handler_error_count = 0; |
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57 |
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3018
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58 // TRUE means we can be interrupted. |
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59 bool can_interrupt = false; |
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1
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60 |
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4185
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61 // TRUE means we should try to enter the debugger on SIGINT. |
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62 static bool Vdebug_on_interrupt = false; |
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63 |
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4449
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64 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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65 // closing gnome-terminal, for example). Note that this variable has |
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66 // no effect if Vcrash_dumps_octave_core is FALSE. |
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67 static bool Vsighup_dumps_octave_core; |
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68 |
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69 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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70 static bool Vsigterm_dumps_octave_core; |
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71 |
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2469
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72 #if RETSIGTYPE == void |
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73 #define SIGHANDLER_RETURN(status) return |
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74 #else |
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75 #define SIGHANDLER_RETURN(status) return status |
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76 #endif |
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77 |
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2554
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78 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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79 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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80 octave_set_signal_handler (sig, handler) |
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2931
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81 #define REINSTALL_USES_SIG 1 |
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2554
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82 #else |
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83 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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84 do { } while (0) |
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85 #endif |
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86 |
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87 #if defined (__EMX__) |
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2626
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88 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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89 octave_set_signal_handler (sig, SIG_ACK) |
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2931
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90 #define ACK_USES_SIG 1 |
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2554
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91 #else |
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2626
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92 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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93 do { } while (0) |
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94 #endif |
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95 |
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5142
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96 // List of signals we have caught since last call to octave_signal_handler. |
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97 static bool octave_signals_caught[NSIG]; |
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98 |
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99 // Called from OCTAVE_QUIT to actually do something about the signals |
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100 // we have caught. |
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101 |
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102 void |
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103 octave_signal_handler (void) |
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104 { |
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105 // The list of signals is relatively short, so we will just go |
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106 // linearly through the list. |
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107 |
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108 for (int i = 0; i < NSIG; i++) |
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109 { |
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110 if (octave_signals_caught[i]) |
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111 { |
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112 octave_signals_caught[i] = false; |
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113 |
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114 switch (i) |
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115 { |
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116 case SIGCHLD: |
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117 octave_child_list::reap (); |
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118 break; |
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119 |
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120 case SIGFPE: |
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121 std::cerr << "warning: floating point exception -- trying to return to prompt" << std::endl; |
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122 break; |
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123 |
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124 case SIGPIPE: |
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125 std::cerr << "warning: broken pipe -- some output may be lost" << std::endl; |
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126 break; |
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127 } |
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128 } |
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129 } |
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130 } |
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131 |
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132 static void |
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4787
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133 my_friendly_exit (const char *sig_name, int sig_number, |
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134 bool save_vars = true) |
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135 { |
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2536
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136 static bool been_there_done_that = false; |
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137 |
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138 if (been_there_done_that) |
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139 { |
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2554
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140 #if defined (SIGABRT) |
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2536
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141 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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142 #endif |
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143 |
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3644
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144 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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2536
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145 abort (); |
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146 } |
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147 else |
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148 { |
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149 been_there_done_that = true; |
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1373
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150 |
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3644
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151 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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2536
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152 |
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4787
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153 if (save_vars) |
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4791
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154 dump_octave_core (); |
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2536
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155 |
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3162
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156 if (sig_number < 0) |
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157 exit (1); |
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158 else |
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159 { |
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160 octave_set_signal_handler (sig_number, SIG_DFL); |
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161 |
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4092
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162 #if defined (HAVE_RAISE) |
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163 raise (sig_number); |
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164 #elif defined (HAVE_KILL) |
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3162
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165 kill (getpid (), sig_number); |
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4092
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166 #else |
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167 exit (1); |
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168 #endif |
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3162
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169 } |
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4092
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170 |
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2536
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171 } |
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1
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172 } |
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173 |
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1446
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174 sig_handler * |
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175 octave_set_signal_handler (int sig, sig_handler *handler) |
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176 { |
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177 #if defined (HAVE_POSIX_SIGNALS) |
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178 struct sigaction act, oact; |
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179 act.sa_handler = handler; |
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180 act.sa_flags = 0; |
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181 sigemptyset (&act.sa_mask); |
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182 sigemptyset (&oact.sa_mask); |
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183 sigaction (sig, &act, &oact); |
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184 return oact.sa_handler; |
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185 #else |
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186 return signal (sig, handler); |
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187 #endif |
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188 } |
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189 |
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1
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190 static RETSIGTYPE |
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1446
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191 generic_sig_handler (int sig) |
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1
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192 { |
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1446
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193 my_friendly_exit (sys_siglist[sig], sig); |
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1
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194 |
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2469
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195 SIGHANDLER_RETURN (0); |
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1
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196 } |
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197 |
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2091
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198 // Handle SIGCHLD. |
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199 |
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4064
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200 #ifdef SIGCHLD |
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201 static RETSIGTYPE |
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202 sigchld_handler (int /* sig */) |
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203 { |
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2705
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204 volatile octave_interrupt_handler saved_interrupt_handler |
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2554
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205 = octave_ignore_interrupts (); |
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206 |
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2626
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207 // I wonder if this is really right, or if SIGCHLD should just be |
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208 // blocked on OS/2 systems the same as for systems with POSIX signal |
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209 // functions. |
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210 |
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211 #if defined (__EMX__) |
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212 volatile sig_handler *saved_sigchld_handler |
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213 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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214 #endif |
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215 |
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2626
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216 sigset_t set, oset; |
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217 |
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218 BLOCK_CHILD (set, oset); |
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219 |
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5142
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220 if (octave_child_list::wait ()) |
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221 { |
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5142
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222 // The status of some child changed. |
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223 |
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5142
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224 octave_signal_caught = 1; |
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225 |
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5142
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226 octave_signals_caught[SIGCHLD] = true; |
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227 } |
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228 |
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2600
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229 octave_set_interrupt_handler (saved_interrupt_handler); |
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230 |
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2626
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231 UNBLOCK_CHILD (oset); |
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232 |
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233 #ifdef __EMX__ |
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234 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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2475
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235 #endif |
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236 |
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2626
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237 MAYBE_ACK_SIGNAL (SIGCHLD); |
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2554
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238 |
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239 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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240 |
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2469
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241 SIGHANDLER_RETURN (0); |
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1230
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242 } |
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4064
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243 #endif /* defined(SIGCHLD) */ |
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1230
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244 |
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4064
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245 #ifdef SIGFPE |
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1373
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246 #if defined (__alpha__) |
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247 static RETSIGTYPE |
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1488
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248 sigfpe_handler (int /* sig */) |
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1373
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249 { |
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2626
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250 MAYBE_ACK_SIGNAL (SIGFPE); |
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2554
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251 |
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252 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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253 |
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5142
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254 if (can_interrupt && octave_interrupt_state >= 0) |
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255 { |
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256 octave_signal_caught = 1; |
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1373
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257 |
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5142
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258 octave_signals_caught[SIGFPE] = true; |
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4182
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259 |
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5142
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260 octave_interrupt_state++; |
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261 } |
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1373
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262 |
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2469
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263 SIGHANDLER_RETURN (0); |
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1373
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264 } |
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4064
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265 #endif /* defined(__alpha__) */ |
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266 #endif /* defined(SIGFPE) */ |
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1373
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267 |
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4449
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268 #if defined (SIGHUP) || defined (SIGTERM) |
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269 static RETSIGTYPE |
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270 sig_hup_or_term_handler (int sig) |
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271 { |
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272 MAYBE_ACK_SIGNAL (sig); |
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273 |
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274 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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275 |
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276 switch (sig) |
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277 { |
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278 #if defined (SIGHUP) |
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279 case SIGHUP: |
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280 { |
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281 if (Vsighup_dumps_octave_core) |
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4791
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282 dump_octave_core (); |
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4449
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283 } |
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284 break; |
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285 #endif |
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286 |
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287 #if defined (SIGTERM) |
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288 case SIGTERM: |
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289 { |
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290 if (Vsigterm_dumps_octave_core) |
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4791
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291 dump_octave_core (); |
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4449
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292 } |
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293 break; |
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294 #endif |
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295 |
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296 default: |
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297 break; |
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298 } |
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299 |
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300 clean_up_and_exit (0); |
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301 |
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302 SIGHANDLER_RETURN (0); |
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303 } |
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304 #endif |
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305 |
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3343
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306 #if 0 |
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3281
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307 #if defined (SIGWINCH) |
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308 static RETSIGTYPE |
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309 sigwinch_handler (int /* sig */) |
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310 { |
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311 MAYBE_ACK_SIGNAL (SIGWINCH); |
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312 |
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313 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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314 |
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315 command_editor::resize_terminal (); |
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316 |
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317 SIGHANDLER_RETURN (0); |
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318 } |
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319 #endif |
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3343
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320 #endif |
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3281
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321 |
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635
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322 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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323 // |
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324 // This also has to work for SIGBREAK (on systems that have it), so we |
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325 // use the value of sig, instead of just assuming that it is called |
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326 // for SIGINT only. |
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635
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327 |
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1
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328 static RETSIGTYPE |
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2554
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329 sigint_handler (int sig) |
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1
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330 { |
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2626
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331 MAYBE_ACK_SIGNAL (sig); |
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2554
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332 |
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333 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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834
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334 |
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4172
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335 if (! octave_initialized) |
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336 exit (1); |
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337 |
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1
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338 if (can_interrupt) |
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339 { |
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4185
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340 if (Vdebug_on_interrupt) |
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341 { |
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342 if (! octave_debug_on_interrupt_state) |
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343 { |
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344 octave_debug_on_interrupt_state = true; |
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345 |
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346 SIGHANDLER_RETURN (0); |
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347 } |
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348 else |
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349 // Clear the flag and do normal interrupt stuff. |
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350 octave_debug_on_interrupt_state = false; |
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351 } |
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352 |
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4153
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353 if (octave_interrupt_immediately) |
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354 octave_jump_to_enclosing_context (); |
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4429
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355 else |
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4787
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356 { |
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4793
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357 // If we are already cleaning up from a previous interrupt, |
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358 // take note of the fact that another interrupt signal has |
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359 // arrived. |
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360 |
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361 if (octave_interrupt_state < 0) |
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362 octave_interrupt_state = 0; |
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363 |
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5142
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364 octave_signal_caught = 1; |
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4787
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365 octave_interrupt_state++; |
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366 |
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4791
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367 if (interactive && octave_interrupt_state == 2) |
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368 std::cerr << "Press Control-C again to abort." << std::endl; |
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4787
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369 |
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4791
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370 if (octave_interrupt_state >= 3) |
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371 my_friendly_exit (sys_siglist[sig], sig, true); |
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4787
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372 } |
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1
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373 } |
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374 |
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2469
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375 SIGHANDLER_RETURN (0); |
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1
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376 } |
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377 |
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4064
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378 #ifdef SIGPIPE |
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1
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379 static RETSIGTYPE |
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1488
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380 sigpipe_handler (int /* sig */) |
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1
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381 { |
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2626
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382 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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383 |
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384 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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385 |
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5142
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386 octave_signal_caught = 1; |
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387 |
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388 octave_signals_caught[SIGPIPE] = true; |
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1
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389 |
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1358
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390 // Don't loop forever on account of this. |
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391 |
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5142
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392 if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) |
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4787
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393 octave_interrupt_state++; |
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1
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394 |
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2469
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395 SIGHANDLER_RETURN (0); |
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1
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396 } |
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4064
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397 #endif /* defined(SIGPIPE) */ |
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1
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398 |
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2705
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399 octave_interrupt_handler |
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2554
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400 octave_catch_interrupts (void) |
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401 { |
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2705
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402 octave_interrupt_handler retval; |
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2554
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403 |
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404 #ifdef SIGINT |
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2705
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405 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
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2554
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406 #endif |
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407 |
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408 #ifdef SIGBREAK |
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2705
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409 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
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2554
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410 #endif |
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2705
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411 |
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412 return retval; |
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2554
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413 } |
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414 |
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2705
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415 octave_interrupt_handler |
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416 octave_ignore_interrupts (void) |
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2554
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417 { |
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2705
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418 octave_interrupt_handler retval; |
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419 |
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2554
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420 #ifdef SIGINT |
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2705
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421 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
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2554
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422 #endif |
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423 |
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424 #ifdef SIGBREAK |
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2705
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425 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
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2554
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426 #endif |
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2705
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427 |
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428 return retval; |
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429 } |
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430 |
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431 octave_interrupt_handler |
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432 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h) |
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433 { |
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434 octave_interrupt_handler retval; |
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435 |
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436 #ifdef SIGINT |
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437 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler); |
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438 #endif |
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439 |
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440 #ifdef SIGBREAK |
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441 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler); |
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442 #endif |
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443 |
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444 return retval; |
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1651
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445 } |
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446 |
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635
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447 // Install all the handlers for the signals we might care about. |
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448 |
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1
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449 void |
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450 install_signal_handlers (void) |
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451 { |
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5142
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452 for (int i = 0; i < NSIG; i++) |
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453 octave_signals_caught[i] = false; |
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454 |
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2554
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455 octave_catch_interrupts (); |
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456 |
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1
|
457 #ifdef SIGABRT |
|
1446
|
458 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
|
1
|
459 #endif |
|
|
460 |
|
|
461 #ifdef SIGALRM |
|
1446
|
462 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
|
1
|
463 #endif |
|
|
464 |
|
|
465 #ifdef SIGBUS |
|
1446
|
466 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
|
1
|
467 #endif |
|
|
468 |
|
1230
|
469 #ifdef SIGCHLD |
|
1446
|
470 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
|
1230
|
471 #endif |
|
|
472 |
|
3174
|
473 // SIGCLD |
|
|
474 // SIGCONT |
|
|
475 |
|
1
|
476 #ifdef SIGEMT |
|
1446
|
477 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
|
1
|
478 #endif |
|
|
479 |
|
|
480 #ifdef SIGFPE |
|
1373
|
481 #if defined (__alpha__) |
|
1446
|
482 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
|
1373
|
483 #else |
|
1446
|
484 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
|
1
|
485 #endif |
|
1373
|
486 #endif |
|
1
|
487 |
|
|
488 #ifdef SIGHUP |
|
4449
|
489 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
|
1
|
490 #endif |
|
|
491 |
|
|
492 #ifdef SIGILL |
|
1446
|
493 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
494 #endif |
|
|
495 |
|
3174
|
496 // SIGINFO |
|
|
497 // SIGINT |
|
|
498 |
|
1
|
499 #ifdef SIGIOT |
|
1446
|
500 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
501 #endif |
|
|
502 |
|
|
503 #ifdef SIGLOST |
|
1446
|
504 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
505 #endif |
|
|
506 |
|
|
507 #ifdef SIGPIPE |
|
1446
|
508 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
509 #endif |
|
|
510 |
|
|
511 #ifdef SIGPOLL |
|
1446
|
512 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
513 #endif |
|
|
514 |
|
|
515 #ifdef SIGPROF |
|
1446
|
516 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
517 #endif |
|
|
518 |
|
3174
|
519 // SIGPWR |
|
|
520 |
|
1
|
521 #ifdef SIGQUIT |
|
1446
|
522 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
523 #endif |
|
|
524 |
|
|
525 #ifdef SIGSEGV |
|
1446
|
526 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
527 #endif |
|
|
528 |
|
3174
|
529 // SIGSTOP |
|
|
530 |
|
1
|
531 #ifdef SIGSYS |
|
1446
|
532 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
533 #endif |
|
|
534 |
|
|
535 #ifdef SIGTERM |
|
4449
|
536 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
537 #endif |
|
|
538 |
|
|
539 #ifdef SIGTRAP |
|
1446
|
540 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
541 #endif |
|
|
542 |
|
3174
|
543 // SIGTSTP |
|
|
544 // SIGTTIN |
|
|
545 // SIGTTOU |
|
|
546 // SIGURG |
|
|
547 |
|
1
|
548 #ifdef SIGUSR1 |
|
1446
|
549 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
550 #endif |
|
|
551 |
|
|
552 #ifdef SIGUSR2 |
|
1446
|
553 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
554 #endif |
|
|
555 |
|
|
556 #ifdef SIGVTALRM |
|
1446
|
557 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
558 #endif |
|
|
559 |
|
895
|
560 #ifdef SIGIO |
|
1446
|
561 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
562 #endif |
|
|
563 |
|
3343
|
564 #if 0 |
|
3281
|
565 #ifdef SIGWINCH |
|
|
566 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
567 #endif |
|
3343
|
568 #endif |
|
3174
|
569 |
|
1
|
570 #ifdef SIGXCPU |
|
1446
|
571 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
572 #endif |
|
|
573 |
|
|
574 #ifdef SIGXFSZ |
|
1446
|
575 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
576 #endif |
|
|
577 } |
|
|
578 |
|
4294
|
579 static Octave_map |
|
|
580 make_sig_struct (void) |
|
|
581 { |
|
|
582 Octave_map m; |
|
|
583 |
|
|
584 #ifdef SIGABRT |
|
4675
|
585 m.assign ("ABRT", SIGABRT); |
|
4294
|
586 #endif |
|
|
587 |
|
|
588 #ifdef SIGALRM |
|
4675
|
589 m.assign ("ALRM", SIGALRM); |
|
4294
|
590 #endif |
|
|
591 |
|
|
592 #ifdef SIGBUS |
|
4675
|
593 m.assign ("BUS", SIGBUS); |
|
4294
|
594 #endif |
|
|
595 |
|
|
596 #ifdef SIGCHLD |
|
4675
|
597 m.assign ("CHLD", SIGCHLD); |
|
4294
|
598 #endif |
|
|
599 |
|
|
600 #ifdef SIGCLD |
|
4675
|
601 m.assign ("CLD", SIGCLD); |
|
4294
|
602 #endif |
|
|
603 |
|
|
604 #ifdef SIGCONT |
|
4675
|
605 m.assign ("CONT", SIGCONT); |
|
4294
|
606 #endif |
|
|
607 |
|
|
608 #ifdef SIGEMT |
|
4675
|
609 m.assign ("EMT", SIGEMT); |
|
4294
|
610 #endif |
|
|
611 |
|
|
612 #ifdef SIGFPE |
|
4675
|
613 m.assign ("FPE", SIGFPE); |
|
4294
|
614 #endif |
|
|
615 |
|
|
616 #ifdef SIGHUP |
|
4675
|
617 m.assign ("HUP", SIGHUP); |
|
4294
|
618 #endif |
|
|
619 |
|
|
620 #ifdef SIGILL |
|
4675
|
621 m.assign ("ILL", SIGILL); |
|
4294
|
622 #endif |
|
|
623 |
|
|
624 #ifdef SIGINFO |
|
4675
|
625 m.assign ("INFO", SIGINFO); |
|
4294
|
626 #endif |
|
|
627 |
|
|
628 #ifdef SIGINT |
|
4675
|
629 m.assign ("INT", SIGINT); |
|
4294
|
630 #endif |
|
|
631 |
|
|
632 #ifdef SIGIOT |
|
4675
|
633 m.assign ("IOT", SIGIOT); |
|
4294
|
634 #endif |
|
|
635 |
|
|
636 #ifdef SIGLOST |
|
4675
|
637 m.assign ("LOST", SIGLOST); |
|
4294
|
638 #endif |
|
|
639 |
|
|
640 #ifdef SIGPIPE |
|
4675
|
641 m.assign ("PIPE", SIGPIPE); |
|
4294
|
642 #endif |
|
|
643 |
|
|
644 #ifdef SIGPOLL |
|
4675
|
645 m.assign ("POLL", SIGPOLL); |
|
4294
|
646 #endif |
|
|
647 |
|
|
648 #ifdef SIGPROF |
|
4675
|
649 m.assign ("PROF", SIGPROF); |
|
4294
|
650 #endif |
|
|
651 |
|
|
652 #ifdef SIGPWR |
|
4675
|
653 m.assign ("PWR", SIGPWR); |
|
4294
|
654 #endif |
|
|
655 |
|
|
656 #ifdef SIGQUIT |
|
4675
|
657 m.assign ("QUIT", SIGQUIT); |
|
4294
|
658 #endif |
|
|
659 |
|
|
660 #ifdef SIGSEGV |
|
4675
|
661 m.assign ("SEGV", SIGSEGV); |
|
4294
|
662 #endif |
|
|
663 |
|
|
664 #ifdef SIGSTOP |
|
4675
|
665 m.assign ("STOP", SIGSTOP); |
|
4294
|
666 #endif |
|
|
667 |
|
|
668 #ifdef SIGSYS |
|
4675
|
669 m.assign ("SYS", SIGSYS); |
|
4294
|
670 #endif |
|
|
671 |
|
|
672 #ifdef SIGTERM |
|
4675
|
673 m.assign ("TERM", SIGTERM); |
|
4294
|
674 #endif |
|
|
675 |
|
|
676 #ifdef SIGTRAP |
|
4675
|
677 m.assign ("TRAP", SIGTRAP); |
|
4294
|
678 #endif |
|
|
679 |
|
|
680 #ifdef SIGTSTP |
|
4675
|
681 m.assign ("TSTP", SIGTSTP); |
|
4294
|
682 #endif |
|
|
683 |
|
|
684 #ifdef SIGTTIN |
|
4675
|
685 m.assign ("TTIN", SIGTTIN); |
|
4294
|
686 #endif |
|
|
687 |
|
|
688 #ifdef SIGTTOU |
|
4675
|
689 m.assign ("TTOU", SIGTTOU); |
|
4294
|
690 #endif |
|
|
691 |
|
|
692 #ifdef SIGURG |
|
4675
|
693 m.assign ("URG", SIGURG); |
|
4294
|
694 #endif |
|
|
695 |
|
|
696 #ifdef SIGUSR1 |
|
4675
|
697 m.assign ("USR1", SIGUSR1); |
|
4294
|
698 #endif |
|
|
699 |
|
|
700 #ifdef SIGUSR2 |
|
4675
|
701 m.assign ("USR2", SIGUSR2); |
|
4294
|
702 #endif |
|
|
703 |
|
|
704 #ifdef SIGVTALRM |
|
4675
|
705 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
706 #endif |
|
|
707 |
|
|
708 #ifdef SIGIO |
|
4675
|
709 m.assign ("IO", SIGIO); |
|
4294
|
710 #endif |
|
|
711 |
|
|
712 #ifdef SIGWINCH |
|
4675
|
713 m.assign ("WINCH", SIGWINCH); |
|
4294
|
714 #endif |
|
|
715 |
|
|
716 #ifdef SIGXCPU |
|
4675
|
717 m.assign ("XCPU", SIGXCPU); |
|
4294
|
718 #endif |
|
|
719 |
|
|
720 #ifdef SIGXFSZ |
|
4675
|
721 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
722 #endif |
|
|
723 |
|
|
724 return m; |
|
|
725 } |
|
|
726 |
|
5142
|
727 octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; |
|
5128
|
728 |
|
2926
|
729 bool |
|
|
730 octave_child_list::instance_ok (void) |
|
|
731 { |
|
|
732 bool retval = true; |
|
|
733 |
|
|
734 if (! instance) |
|
5142
|
735 instance = new octave_child_list_rep (); |
|
2926
|
736 |
|
|
737 if (! instance) |
|
|
738 { |
|
|
739 ::error ("unable to create child list object!"); |
|
|
740 |
|
|
741 retval = false; |
|
|
742 } |
|
|
743 |
|
|
744 return retval; |
|
|
745 } |
|
|
746 |
|
|
747 void |
|
5142
|
748 octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) |
|
|
749 { |
|
|
750 if (instance_ok ()) |
|
|
751 instance->insert (pid, f); |
|
|
752 } |
|
|
753 |
|
|
754 void |
|
|
755 octave_child_list::reap (void) |
|
2926
|
756 { |
|
|
757 if (instance_ok ()) |
|
5142
|
758 instance->reap (); |
|
|
759 } |
|
|
760 |
|
|
761 bool |
|
|
762 octave_child_list::wait (void) |
|
|
763 { |
|
|
764 return (instance_ok ()) ? instance->wait () : false; |
|
2926
|
765 } |
|
|
766 |
|
5142
|
767 class pid_equal |
|
|
768 { |
|
|
769 public: |
|
|
770 |
|
|
771 pid_equal (pid_t v) : val (v) { } |
|
|
772 |
|
|
773 bool operator () (const octave_child& oc) const { return oc.pid == val; } |
|
|
774 |
|
|
775 private: |
|
|
776 |
|
|
777 pid_t val; |
|
|
778 }; |
|
|
779 |
|
2926
|
780 void |
|
|
781 octave_child_list::remove (pid_t pid) |
|
|
782 { |
|
|
783 if (instance_ok ()) |
|
5142
|
784 instance->remove_if (pid_equal (pid)); |
|
2926
|
785 } |
|
|
786 |
|
5142
|
787 #define OCL_REP octave_child_list::octave_child_list_rep |
|
2926
|
788 |
|
5142
|
789 void |
|
|
790 OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) |
|
2926
|
791 { |
|
5142
|
792 append (octave_child (pid, f)); |
|
2926
|
793 } |
|
|
794 |
|
2209
|
795 void |
|
5142
|
796 OCL_REP::reap (void) |
|
2209
|
797 { |
|
5142
|
798 // Mark the record for PID invalid. |
|
2209
|
799 |
|
5142
|
800 for (iterator p = begin (); p != end (); p++) |
|
|
801 { |
|
|
802 // The call to the octave_child::child_event_handler might |
|
|
803 // invalidate the iterator (for example, by calling |
|
|
804 // octave_child_list::remove), so we increment the iterator |
|
|
805 // here. |
|
2209
|
806 |
|
5142
|
807 octave_child& oc = *p; |
|
2209
|
808 |
|
5142
|
809 if (oc.have_status) |
|
2209
|
810 { |
|
5142
|
811 oc.have_status = 0; |
|
|
812 |
|
|
813 octave_child::child_event_handler f = oc.handler; |
|
|
814 |
|
|
815 if (f && f (oc.pid, oc.status)) |
|
|
816 oc.pid = -1; |
|
2209
|
817 } |
|
|
818 } |
|
|
819 |
|
5142
|
820 remove_if (pid_equal (-1)); |
|
2209
|
821 } |
|
|
822 |
|
5142
|
823 // Wait on our children and record any changes in their status. |
|
|
824 |
|
|
825 bool |
|
|
826 OCL_REP::wait (void) |
|
2210
|
827 { |
|
5142
|
828 bool retval = false; |
|
2210
|
829 |
|
5142
|
830 for (iterator p = begin (); p != end (); p++) |
|
2210
|
831 { |
|
5142
|
832 octave_child& oc = *p; |
|
|
833 |
|
|
834 pid_t pid = oc.pid; |
|
|
835 |
|
|
836 if (pid > 0) |
|
|
837 { |
|
|
838 int status; |
|
2210
|
839 |
|
5142
|
840 if (waitpid (pid, &status, WNOHANG) > 0) |
|
|
841 { |
|
|
842 oc.have_status = 1; |
|
|
843 |
|
|
844 oc.status = status; |
|
|
845 |
|
|
846 retval = true; |
|
|
847 |
|
|
848 break; |
|
|
849 } |
|
2210
|
850 } |
|
|
851 } |
|
|
852 |
|
5142
|
853 return retval; |
|
2210
|
854 } |
|
|
855 |
|
4185
|
856 static int |
|
|
857 debug_on_interrupt (void) |
|
|
858 { |
|
|
859 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
860 |
|
|
861 return 0; |
|
|
862 } |
|
|
863 |
|
4449
|
864 static int |
|
|
865 sighup_dumps_octave_core (void) |
|
|
866 { |
|
|
867 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
868 |
|
|
869 return 0; |
|
|
870 } |
|
|
871 |
|
|
872 static int |
|
|
873 sigterm_dumps_octave_core (void) |
|
|
874 { |
|
|
875 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
876 |
|
|
877 return 0; |
|
|
878 } |
|
|
879 |
|
4185
|
880 void |
|
|
881 symbols_of_sighandlers (void) |
|
|
882 { |
|
4233
|
883 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
884 "-*- texinfo -*-\n\ |
|
|
885 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
886 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
887 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
888 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
889 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
890 The default value is 0.\n\ |
|
|
891 @end defvr"); |
|
4294
|
892 |
|
4449
|
893 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
894 "-*- texinfo -*-\n\ |
|
|
895 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
896 If this variable is set to a nonzero value and\n\ |
|
|
897 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
898 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
899 hangup signal. The default value is 1.\n\ |
|
|
900 @end defvr"); |
|
|
901 |
|
|
902 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
903 "-*- texinfo -*-\n\ |
|
|
904 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
905 If this variable is set to a nonzero value and\n\ |
|
|
906 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
907 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
908 terminate signal. The default value is 1.\n\ |
|
|
909 @end defvr"); |
|
|
910 |
|
4294
|
911 DEFCONST (SIG, make_sig_struct (), |
|
|
912 "-*- texinfo -*-\n\ |
|
|
913 @defvr {Built-in Variable} SIG\n\ |
|
|
914 Structure of Unix signal names and their defined values.\n\ |
|
|
915 @end defvr"); |
|
4185
|
916 } |
|
|
917 |
|
1
|
918 /* |
|
|
919 ;;; Local Variables: *** |
|
|
920 ;;; mode: C++ *** |
|
|
921 ;;; End: *** |
|
|
922 */ |
