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1
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1 /* |
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2 |
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2847
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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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5307
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, 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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1230
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25 #include <config.h> |
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1
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26 #endif |
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27 |
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2536
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28 #include <cstdlib> |
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29 |
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3503
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30 #include <iostream> |
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1344
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31 #include <new> |
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32 |
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1350
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33 #ifdef HAVE_UNISTD_H |
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2442
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34 #ifdef HAVE_SYS_TYPES_H |
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834
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35 #include <sys/types.h> |
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2442
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36 #endif |
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834
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37 #include <unistd.h> |
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38 #endif |
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1343
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39 |
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3281
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40 #include "cmd-edit.h" |
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4153
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41 #include "quit.h" |
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3281
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42 |
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4185
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43 #include "defun.h" |
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1352
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44 #include "error.h" |
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1373
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45 #include "load-save.h" |
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4294
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46 #include "oct-map.h" |
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2091
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47 #include "pager.h" |
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4185
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48 #include "pt-bp.h" |
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1
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49 #include "sighandlers.h" |
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4787
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50 #include "sysdep.h" |
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1352
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51 #include "syswait.h" |
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2091
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52 #include "toplev.h" |
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1
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53 #include "utils.h" |
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54 |
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55 // Nonzero means we have already printed a message for this series of |
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56 // SIGPIPES. We assume that the writer will eventually give up. |
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57 int pipe_handler_error_count = 0; |
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58 |
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3018
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59 // TRUE means we can be interrupted. |
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60 bool can_interrupt = false; |
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1
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61 |
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4185
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62 // TRUE means we should try to enter the debugger on SIGINT. |
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63 static bool Vdebug_on_interrupt = false; |
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64 |
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4449
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65 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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66 // closing gnome-terminal, for example). Note that this variable has |
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67 // no effect if Vcrash_dumps_octave_core is FALSE. |
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68 static bool Vsighup_dumps_octave_core; |
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69 |
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70 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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71 static bool Vsigterm_dumps_octave_core; |
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72 |
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2469
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73 #if RETSIGTYPE == void |
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74 #define SIGHANDLER_RETURN(status) return |
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75 #else |
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76 #define SIGHANDLER_RETURN(status) return status |
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77 #endif |
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78 |
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2554
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79 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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80 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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81 octave_set_signal_handler (sig, handler) |
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2931
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82 #define REINSTALL_USES_SIG 1 |
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2554
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83 #else |
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84 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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85 do { } while (0) |
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86 #endif |
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87 |
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88 #if defined (__EMX__) |
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2626
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89 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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90 octave_set_signal_handler (sig, SIG_ACK) |
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2931
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91 #define ACK_USES_SIG 1 |
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2554
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92 #else |
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2626
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93 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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94 do { } while (0) |
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95 #endif |
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96 |
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5142
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97 // List of signals we have caught since last call to octave_signal_handler. |
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98 static bool octave_signals_caught[NSIG]; |
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99 |
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100 // Called from OCTAVE_QUIT to actually do something about the signals |
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101 // we have caught. |
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102 |
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103 void |
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104 octave_signal_handler (void) |
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105 { |
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106 // The list of signals is relatively short, so we will just go |
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107 // linearly through the list. |
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108 |
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109 for (int i = 0; i < NSIG; i++) |
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110 { |
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111 if (octave_signals_caught[i]) |
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112 { |
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113 octave_signals_caught[i] = false; |
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114 |
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115 switch (i) |
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116 { |
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5451
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117 #ifdef SIGCHLD |
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5142
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118 case SIGCHLD: |
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119 octave_child_list::reap (); |
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120 break; |
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5451
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121 #endif |
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5142
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122 |
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123 case SIGFPE: |
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124 std::cerr << "warning: floating point exception -- trying to return to prompt" << std::endl; |
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125 break; |
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126 |
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5451
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127 #ifdef SIGPIPE |
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5142
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128 case SIGPIPE: |
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129 std::cerr << "warning: broken pipe -- some output may be lost" << std::endl; |
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130 break; |
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5451
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131 #endif |
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5142
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132 } |
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133 } |
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134 } |
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135 } |
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136 |
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1
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137 static void |
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4787
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138 my_friendly_exit (const char *sig_name, int sig_number, |
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139 bool save_vars = true) |
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1
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140 { |
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2536
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141 static bool been_there_done_that = false; |
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142 |
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143 if (been_there_done_that) |
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144 { |
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2554
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145 #if defined (SIGABRT) |
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2536
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146 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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147 #endif |
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148 |
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3644
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149 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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5451
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150 |
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151 MINGW_SIGNAL_CLEANUP (); |
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152 |
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2536
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153 abort (); |
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154 } |
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155 else |
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156 { |
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157 been_there_done_that = true; |
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1373
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158 |
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3644
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159 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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2536
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160 |
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4787
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161 if (save_vars) |
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4791
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162 dump_octave_core (); |
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2536
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163 |
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3162
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164 if (sig_number < 0) |
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5451
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165 { |
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166 MINGW_SIGNAL_CLEANUP (); |
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167 |
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168 exit (1); |
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169 } |
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3162
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170 else |
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171 { |
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172 octave_set_signal_handler (sig_number, SIG_DFL); |
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173 |
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4092
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174 #if defined (HAVE_RAISE) |
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175 raise (sig_number); |
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176 #elif defined (HAVE_KILL) |
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3162
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177 kill (getpid (), sig_number); |
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4092
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178 #else |
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179 exit (1); |
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180 #endif |
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3162
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181 } |
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4092
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182 |
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2536
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183 } |
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1
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184 } |
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185 |
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1446
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186 sig_handler * |
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187 octave_set_signal_handler (int sig, sig_handler *handler) |
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188 { |
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189 #if defined (HAVE_POSIX_SIGNALS) |
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190 struct sigaction act, oact; |
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5144
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191 |
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1446
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192 act.sa_handler = handler; |
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193 act.sa_flags = 0; |
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5144
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194 |
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195 if (sig == SIGALRM) |
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196 { |
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197 #if defined (SA_INTERRUPT) |
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198 act.sa_flags |= SA_INTERRUPT; |
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199 #endif |
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200 } |
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201 else |
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202 { |
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203 #if defined (SA_RESTART) |
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204 act.sa_flags |= SA_RESTART; |
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205 #endif |
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206 } |
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207 |
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1446
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208 sigemptyset (&act.sa_mask); |
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209 sigemptyset (&oact.sa_mask); |
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5144
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210 |
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1446
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211 sigaction (sig, &act, &oact); |
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5144
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212 |
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1446
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213 return oact.sa_handler; |
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214 #else |
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215 return signal (sig, handler); |
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216 #endif |
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217 } |
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218 |
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1
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219 static RETSIGTYPE |
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1446
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220 generic_sig_handler (int sig) |
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1
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221 { |
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1446
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222 my_friendly_exit (sys_siglist[sig], sig); |
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1
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223 |
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2469
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224 SIGHANDLER_RETURN (0); |
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1
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225 } |
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226 |
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2091
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227 // Handle SIGCHLD. |
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1230
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228 |
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4064
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229 #ifdef SIGCHLD |
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1230
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230 static RETSIGTYPE |
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2092
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231 sigchld_handler (int /* sig */) |
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1230
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232 { |
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2705
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233 volatile octave_interrupt_handler saved_interrupt_handler |
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2554
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234 = octave_ignore_interrupts (); |
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235 |
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2626
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236 // I wonder if this is really right, or if SIGCHLD should just be |
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237 // blocked on OS/2 systems the same as for systems with POSIX signal |
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238 // functions. |
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239 |
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240 #if defined (__EMX__) |
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2554
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241 volatile sig_handler *saved_sigchld_handler |
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2626
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242 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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2554
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243 #endif |
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244 |
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2626
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245 sigset_t set, oset; |
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246 |
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247 BLOCK_CHILD (set, oset); |
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248 |
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5142
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249 if (octave_child_list::wait ()) |
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2554
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250 { |
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5142
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251 // The status of some child changed. |
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2209
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252 |
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5142
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253 octave_signal_caught = 1; |
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2197
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254 |
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5142
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255 octave_signals_caught[SIGCHLD] = true; |
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1230
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256 } |
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2469
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257 |
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2600
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258 octave_set_interrupt_handler (saved_interrupt_handler); |
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2554
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259 |
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2626
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260 UNBLOCK_CHILD (oset); |
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261 |
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262 #ifdef __EMX__ |
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2554
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263 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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2475
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264 #endif |
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265 |
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2626
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266 MAYBE_ACK_SIGNAL (SIGCHLD); |
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2554
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267 |
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268 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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269 |
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2469
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270 SIGHANDLER_RETURN (0); |
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1230
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271 } |
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4064
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272 #endif /* defined(SIGCHLD) */ |
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1230
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273 |
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4064
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274 #ifdef SIGFPE |
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1373
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275 #if defined (__alpha__) |
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276 static RETSIGTYPE |
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1488
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277 sigfpe_handler (int /* sig */) |
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1373
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278 { |
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2626
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279 MAYBE_ACK_SIGNAL (SIGFPE); |
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2554
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280 |
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281 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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1373
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282 |
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5142
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283 if (can_interrupt && octave_interrupt_state >= 0) |
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284 { |
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285 octave_signal_caught = 1; |
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1373
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286 |
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5142
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287 octave_signals_caught[SIGFPE] = true; |
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4182
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288 |
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5142
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289 octave_interrupt_state++; |
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290 } |
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1373
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291 |
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2469
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292 SIGHANDLER_RETURN (0); |
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1373
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293 } |
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4064
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294 #endif /* defined(__alpha__) */ |
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295 #endif /* defined(SIGFPE) */ |
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1373
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296 |
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4449
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297 #if defined (SIGHUP) || defined (SIGTERM) |
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298 static RETSIGTYPE |
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299 sig_hup_or_term_handler (int sig) |
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300 { |
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301 MAYBE_ACK_SIGNAL (sig); |
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302 |
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303 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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304 |
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305 switch (sig) |
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306 { |
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307 #if defined (SIGHUP) |
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308 case SIGHUP: |
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309 { |
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310 if (Vsighup_dumps_octave_core) |
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4791
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311 dump_octave_core (); |
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4449
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312 } |
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313 break; |
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314 #endif |
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315 |
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316 #if defined (SIGTERM) |
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317 case SIGTERM: |
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318 { |
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319 if (Vsigterm_dumps_octave_core) |
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4791
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320 dump_octave_core (); |
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4449
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321 } |
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322 break; |
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323 #endif |
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324 |
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325 default: |
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326 break; |
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327 } |
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328 |
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329 clean_up_and_exit (0); |
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330 |
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331 SIGHANDLER_RETURN (0); |
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332 } |
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333 #endif |
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334 |
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3343
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335 #if 0 |
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3281
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336 #if defined (SIGWINCH) |
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337 static RETSIGTYPE |
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338 sigwinch_handler (int /* sig */) |
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339 { |
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340 MAYBE_ACK_SIGNAL (SIGWINCH); |
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341 |
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342 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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343 |
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344 command_editor::resize_terminal (); |
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345 |
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346 SIGHANDLER_RETURN (0); |
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347 } |
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348 #endif |
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3343
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349 #endif |
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3281
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350 |
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635
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351 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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352 // |
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353 // This also has to work for SIGBREAK (on systems that have it), so we |
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354 // use the value of sig, instead of just assuming that it is called |
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355 // for SIGINT only. |
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635
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356 |
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5451
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357 static |
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358 void user_abort(const char *sig_name, int sig_number) |
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1
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359 { |
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4172
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360 if (! octave_initialized) |
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361 exit (1); |
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362 |
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1
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363 if (can_interrupt) |
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364 { |
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4185
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365 if (Vdebug_on_interrupt) |
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366 { |
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367 if (! octave_debug_on_interrupt_state) |
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368 { |
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369 octave_debug_on_interrupt_state = true; |
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370 |
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5451
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371 return; |
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4185
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372 } |
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373 else |
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374 // Clear the flag and do normal interrupt stuff. |
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375 octave_debug_on_interrupt_state = false; |
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376 } |
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377 |
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4153
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378 if (octave_interrupt_immediately) |
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379 octave_jump_to_enclosing_context (); |
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4429
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380 else |
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4787
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381 { |
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4793
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382 // If we are already cleaning up from a previous interrupt, |
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383 // take note of the fact that another interrupt signal has |
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384 // arrived. |
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385 |
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386 if (octave_interrupt_state < 0) |
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387 octave_interrupt_state = 0; |
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388 |
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5142
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389 octave_signal_caught = 1; |
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4787
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390 octave_interrupt_state++; |
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391 |
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4791
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392 if (interactive && octave_interrupt_state == 2) |
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393 std::cerr << "Press Control-C again to abort." << std::endl; |
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4787
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394 |
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4791
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395 if (octave_interrupt_state >= 3) |
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5451
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396 my_friendly_exit (sig_name, sig_number, true); |
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4787
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397 } |
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1
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398 } |
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399 |
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5451
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400 } |
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401 |
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402 static RETSIGTYPE |
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403 sigint_handler (int sig) |
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404 { |
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405 MAYBE_ACK_SIGNAL (sig); |
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406 |
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407 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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408 |
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409 #ifdef USE_W32_SIGINT |
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410 if (w32_in_main_thread ()) |
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411 user_abort (sys_siglist[sig], sig); |
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412 else |
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413 w32_raise (sig); |
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414 #else |
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415 user_abort (sys_siglist[sig], sig); |
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416 #endif |
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417 |
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2469
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418 SIGHANDLER_RETURN (0); |
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1
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419 } |
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420 |
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4064
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421 #ifdef SIGPIPE |
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1
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422 static RETSIGTYPE |
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1488
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423 sigpipe_handler (int /* sig */) |
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1
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424 { |
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2626
|
425 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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426 |
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427 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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428 |
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5142
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429 octave_signal_caught = 1; |
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430 |
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431 octave_signals_caught[SIGPIPE] = true; |
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1
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432 |
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1358
|
433 // Don't loop forever on account of this. |
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434 |
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5142
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435 if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) |
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4787
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436 octave_interrupt_state++; |
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1
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437 |
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2469
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438 SIGHANDLER_RETURN (0); |
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1
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439 } |
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4064
|
440 #endif /* defined(SIGPIPE) */ |
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1
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441 |
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5451
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442 #ifdef USE_W32_SIGINT |
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443 static BOOL CALLBACK |
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444 w32_sigint_handler (DWORD sig) |
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445 { |
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446 const char *sig_name; |
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447 |
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448 switch(sig) |
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449 { |
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450 case CTRL_BREAK_EVENT: |
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451 sig_name = "Ctrl-Break"; |
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452 break; |
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453 case CTRL_C_EVENT: |
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454 sig_name = "Ctrl-C"; |
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455 break; |
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456 case CTRL_CLOSE_EVENT: |
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457 sig_name = "close console"; |
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458 break; |
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459 case CTRL_LOGOFF_EVENT: |
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460 sig_name = "logoff"; |
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461 break; |
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462 case CTRL_SHUTDOWN_EVENT: |
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|
463 sig_name = "shutdown"; |
|
|
464 break; |
|
|
465 default: |
|
|
466 sig_name = "unknown console event"; |
|
|
467 break; |
|
|
468 } |
|
|
469 |
|
|
470 switch(sig) |
|
|
471 { |
|
|
472 case CTRL_BREAK_EVENT: |
|
|
473 case CTRL_C_EVENT: |
|
|
474 w32_raise (SIGINT); |
|
|
475 break; |
|
|
476 |
|
|
477 case CTRL_CLOSE_EVENT: |
|
|
478 case CTRL_LOGOFF_EVENT: |
|
|
479 case CTRL_SHUTDOWN_EVENT: |
|
|
480 default: |
|
|
481 // We should do the following: |
|
|
482 // clean_up_and_exit (0); |
|
|
483 // We can't because we aren't running in the normal Octave thread. |
|
|
484 user_abort(sig_name, sig); |
|
|
485 break; |
|
|
486 } |
|
|
487 |
|
|
488 // Return TRUE if the event was handled, or FALSE if another handler |
|
|
489 // should be called. |
|
|
490 // XXX FIXME XXX check that windows terminates the thread. |
|
|
491 return TRUE; |
|
|
492 } |
|
|
493 #endif /* w32_sigint_handler */ |
|
|
494 |
|
|
495 |
|
2705
|
496 octave_interrupt_handler |
|
2554
|
497 octave_catch_interrupts (void) |
|
|
498 { |
|
2705
|
499 octave_interrupt_handler retval; |
|
2554
|
500 |
|
|
501 #ifdef SIGINT |
|
2705
|
502 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
|
2554
|
503 #endif |
|
|
504 |
|
|
505 #ifdef SIGBREAK |
|
2705
|
506 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
|
2554
|
507 #endif |
|
2705
|
508 |
|
5451
|
509 #ifdef USE_W32_SIGINT |
|
|
510 |
|
|
511 // Intercept windows console control events. |
|
|
512 // Note that the windows console signal handlers chain, so if |
|
|
513 // install_signal_handlers is called more than once in the same program, |
|
|
514 // then first call the following to avoid duplicates: |
|
|
515 // |
|
|
516 // SetConsoleCtrlHandler (w32_sigint_handler, FALSE); |
|
|
517 |
|
|
518 if (! SetConsoleCtrlHandler (w32_sigint_handler, TRUE)) |
|
|
519 error ("SetConsoleCtrlHandler failed with %ld\n", GetLastError ()); |
|
|
520 |
|
|
521 w32_set_quiet_shutdown (); |
|
|
522 |
|
|
523 #endif |
|
|
524 |
|
2705
|
525 return retval; |
|
2554
|
526 } |
|
|
527 |
|
2705
|
528 octave_interrupt_handler |
|
|
529 octave_ignore_interrupts (void) |
|
2554
|
530 { |
|
2705
|
531 octave_interrupt_handler retval; |
|
|
532 |
|
2554
|
533 #ifdef SIGINT |
|
2705
|
534 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
2554
|
535 #endif |
|
|
536 |
|
|
537 #ifdef SIGBREAK |
|
2705
|
538 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
|
2554
|
539 #endif |
|
2705
|
540 |
|
|
541 return retval; |
|
|
542 } |
|
|
543 |
|
|
544 octave_interrupt_handler |
|
|
545 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h) |
|
|
546 { |
|
|
547 octave_interrupt_handler retval; |
|
|
548 |
|
|
549 #ifdef SIGINT |
|
|
550 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler); |
|
|
551 #endif |
|
|
552 |
|
|
553 #ifdef SIGBREAK |
|
|
554 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler); |
|
|
555 #endif |
|
|
556 |
|
|
557 return retval; |
|
1651
|
558 } |
|
|
559 |
|
635
|
560 // Install all the handlers for the signals we might care about. |
|
|
561 |
|
1
|
562 void |
|
|
563 install_signal_handlers (void) |
|
|
564 { |
|
5142
|
565 for (int i = 0; i < NSIG; i++) |
|
|
566 octave_signals_caught[i] = false; |
|
|
567 |
|
2554
|
568 octave_catch_interrupts (); |
|
|
569 |
|
1
|
570 #ifdef SIGABRT |
|
1446
|
571 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
|
1
|
572 #endif |
|
|
573 |
|
|
574 #ifdef SIGALRM |
|
1446
|
575 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
|
1
|
576 #endif |
|
|
577 |
|
|
578 #ifdef SIGBUS |
|
1446
|
579 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
|
1
|
580 #endif |
|
|
581 |
|
1230
|
582 #ifdef SIGCHLD |
|
1446
|
583 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
|
1230
|
584 #endif |
|
|
585 |
|
3174
|
586 // SIGCLD |
|
|
587 // SIGCONT |
|
|
588 |
|
1
|
589 #ifdef SIGEMT |
|
1446
|
590 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
|
1
|
591 #endif |
|
|
592 |
|
|
593 #ifdef SIGFPE |
|
1373
|
594 #if defined (__alpha__) |
|
1446
|
595 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
|
1373
|
596 #else |
|
1446
|
597 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
|
1
|
598 #endif |
|
1373
|
599 #endif |
|
1
|
600 |
|
|
601 #ifdef SIGHUP |
|
4449
|
602 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
|
1
|
603 #endif |
|
|
604 |
|
|
605 #ifdef SIGILL |
|
1446
|
606 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
607 #endif |
|
|
608 |
|
3174
|
609 // SIGINFO |
|
|
610 // SIGINT |
|
|
611 |
|
1
|
612 #ifdef SIGIOT |
|
1446
|
613 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
614 #endif |
|
|
615 |
|
|
616 #ifdef SIGLOST |
|
1446
|
617 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
618 #endif |
|
|
619 |
|
|
620 #ifdef SIGPIPE |
|
1446
|
621 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
622 #endif |
|
|
623 |
|
|
624 #ifdef SIGPOLL |
|
1446
|
625 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
626 #endif |
|
|
627 |
|
|
628 #ifdef SIGPROF |
|
1446
|
629 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
630 #endif |
|
|
631 |
|
3174
|
632 // SIGPWR |
|
|
633 |
|
1
|
634 #ifdef SIGQUIT |
|
1446
|
635 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
636 #endif |
|
|
637 |
|
|
638 #ifdef SIGSEGV |
|
1446
|
639 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
640 #endif |
|
|
641 |
|
3174
|
642 // SIGSTOP |
|
|
643 |
|
1
|
644 #ifdef SIGSYS |
|
1446
|
645 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
646 #endif |
|
|
647 |
|
|
648 #ifdef SIGTERM |
|
4449
|
649 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
650 #endif |
|
|
651 |
|
|
652 #ifdef SIGTRAP |
|
1446
|
653 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
654 #endif |
|
|
655 |
|
3174
|
656 // SIGTSTP |
|
|
657 // SIGTTIN |
|
|
658 // SIGTTOU |
|
|
659 // SIGURG |
|
|
660 |
|
1
|
661 #ifdef SIGUSR1 |
|
1446
|
662 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
663 #endif |
|
|
664 |
|
|
665 #ifdef SIGUSR2 |
|
1446
|
666 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
667 #endif |
|
|
668 |
|
|
669 #ifdef SIGVTALRM |
|
1446
|
670 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
671 #endif |
|
|
672 |
|
895
|
673 #ifdef SIGIO |
|
1446
|
674 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
675 #endif |
|
|
676 |
|
3343
|
677 #if 0 |
|
3281
|
678 #ifdef SIGWINCH |
|
|
679 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
680 #endif |
|
3343
|
681 #endif |
|
3174
|
682 |
|
1
|
683 #ifdef SIGXCPU |
|
1446
|
684 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
685 #endif |
|
|
686 |
|
|
687 #ifdef SIGXFSZ |
|
1446
|
688 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
689 #endif |
|
5451
|
690 |
|
1
|
691 } |
|
|
692 |
|
4294
|
693 static Octave_map |
|
|
694 make_sig_struct (void) |
|
|
695 { |
|
|
696 Octave_map m; |
|
|
697 |
|
|
698 #ifdef SIGABRT |
|
4675
|
699 m.assign ("ABRT", SIGABRT); |
|
4294
|
700 #endif |
|
|
701 |
|
|
702 #ifdef SIGALRM |
|
4675
|
703 m.assign ("ALRM", SIGALRM); |
|
4294
|
704 #endif |
|
|
705 |
|
|
706 #ifdef SIGBUS |
|
4675
|
707 m.assign ("BUS", SIGBUS); |
|
4294
|
708 #endif |
|
|
709 |
|
|
710 #ifdef SIGCHLD |
|
4675
|
711 m.assign ("CHLD", SIGCHLD); |
|
4294
|
712 #endif |
|
|
713 |
|
|
714 #ifdef SIGCLD |
|
4675
|
715 m.assign ("CLD", SIGCLD); |
|
4294
|
716 #endif |
|
|
717 |
|
|
718 #ifdef SIGCONT |
|
4675
|
719 m.assign ("CONT", SIGCONT); |
|
4294
|
720 #endif |
|
|
721 |
|
|
722 #ifdef SIGEMT |
|
4675
|
723 m.assign ("EMT", SIGEMT); |
|
4294
|
724 #endif |
|
|
725 |
|
|
726 #ifdef SIGFPE |
|
4675
|
727 m.assign ("FPE", SIGFPE); |
|
4294
|
728 #endif |
|
|
729 |
|
|
730 #ifdef SIGHUP |
|
4675
|
731 m.assign ("HUP", SIGHUP); |
|
4294
|
732 #endif |
|
|
733 |
|
|
734 #ifdef SIGILL |
|
4675
|
735 m.assign ("ILL", SIGILL); |
|
4294
|
736 #endif |
|
|
737 |
|
|
738 #ifdef SIGINFO |
|
4675
|
739 m.assign ("INFO", SIGINFO); |
|
4294
|
740 #endif |
|
|
741 |
|
|
742 #ifdef SIGINT |
|
4675
|
743 m.assign ("INT", SIGINT); |
|
4294
|
744 #endif |
|
|
745 |
|
|
746 #ifdef SIGIOT |
|
4675
|
747 m.assign ("IOT", SIGIOT); |
|
4294
|
748 #endif |
|
|
749 |
|
|
750 #ifdef SIGLOST |
|
4675
|
751 m.assign ("LOST", SIGLOST); |
|
4294
|
752 #endif |
|
|
753 |
|
|
754 #ifdef SIGPIPE |
|
4675
|
755 m.assign ("PIPE", SIGPIPE); |
|
4294
|
756 #endif |
|
|
757 |
|
|
758 #ifdef SIGPOLL |
|
4675
|
759 m.assign ("POLL", SIGPOLL); |
|
4294
|
760 #endif |
|
|
761 |
|
|
762 #ifdef SIGPROF |
|
4675
|
763 m.assign ("PROF", SIGPROF); |
|
4294
|
764 #endif |
|
|
765 |
|
|
766 #ifdef SIGPWR |
|
4675
|
767 m.assign ("PWR", SIGPWR); |
|
4294
|
768 #endif |
|
|
769 |
|
|
770 #ifdef SIGQUIT |
|
4675
|
771 m.assign ("QUIT", SIGQUIT); |
|
4294
|
772 #endif |
|
|
773 |
|
|
774 #ifdef SIGSEGV |
|
4675
|
775 m.assign ("SEGV", SIGSEGV); |
|
4294
|
776 #endif |
|
|
777 |
|
|
778 #ifdef SIGSTOP |
|
4675
|
779 m.assign ("STOP", SIGSTOP); |
|
4294
|
780 #endif |
|
|
781 |
|
|
782 #ifdef SIGSYS |
|
4675
|
783 m.assign ("SYS", SIGSYS); |
|
4294
|
784 #endif |
|
|
785 |
|
|
786 #ifdef SIGTERM |
|
4675
|
787 m.assign ("TERM", SIGTERM); |
|
4294
|
788 #endif |
|
|
789 |
|
|
790 #ifdef SIGTRAP |
|
4675
|
791 m.assign ("TRAP", SIGTRAP); |
|
4294
|
792 #endif |
|
|
793 |
|
|
794 #ifdef SIGTSTP |
|
4675
|
795 m.assign ("TSTP", SIGTSTP); |
|
4294
|
796 #endif |
|
|
797 |
|
|
798 #ifdef SIGTTIN |
|
4675
|
799 m.assign ("TTIN", SIGTTIN); |
|
4294
|
800 #endif |
|
|
801 |
|
|
802 #ifdef SIGTTOU |
|
4675
|
803 m.assign ("TTOU", SIGTTOU); |
|
4294
|
804 #endif |
|
|
805 |
|
|
806 #ifdef SIGURG |
|
4675
|
807 m.assign ("URG", SIGURG); |
|
4294
|
808 #endif |
|
|
809 |
|
|
810 #ifdef SIGUSR1 |
|
4675
|
811 m.assign ("USR1", SIGUSR1); |
|
4294
|
812 #endif |
|
|
813 |
|
|
814 #ifdef SIGUSR2 |
|
4675
|
815 m.assign ("USR2", SIGUSR2); |
|
4294
|
816 #endif |
|
|
817 |
|
|
818 #ifdef SIGVTALRM |
|
4675
|
819 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
820 #endif |
|
|
821 |
|
|
822 #ifdef SIGIO |
|
4675
|
823 m.assign ("IO", SIGIO); |
|
4294
|
824 #endif |
|
|
825 |
|
|
826 #ifdef SIGWINCH |
|
4675
|
827 m.assign ("WINCH", SIGWINCH); |
|
4294
|
828 #endif |
|
|
829 |
|
|
830 #ifdef SIGXCPU |
|
4675
|
831 m.assign ("XCPU", SIGXCPU); |
|
4294
|
832 #endif |
|
|
833 |
|
|
834 #ifdef SIGXFSZ |
|
4675
|
835 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
836 #endif |
|
|
837 |
|
|
838 return m; |
|
|
839 } |
|
|
840 |
|
5142
|
841 octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; |
|
5128
|
842 |
|
2926
|
843 bool |
|
|
844 octave_child_list::instance_ok (void) |
|
|
845 { |
|
|
846 bool retval = true; |
|
|
847 |
|
|
848 if (! instance) |
|
5142
|
849 instance = new octave_child_list_rep (); |
|
2926
|
850 |
|
|
851 if (! instance) |
|
|
852 { |
|
|
853 ::error ("unable to create child list object!"); |
|
|
854 |
|
|
855 retval = false; |
|
|
856 } |
|
|
857 |
|
|
858 return retval; |
|
|
859 } |
|
|
860 |
|
|
861 void |
|
5142
|
862 octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) |
|
|
863 { |
|
|
864 if (instance_ok ()) |
|
|
865 instance->insert (pid, f); |
|
|
866 } |
|
|
867 |
|
|
868 void |
|
|
869 octave_child_list::reap (void) |
|
2926
|
870 { |
|
|
871 if (instance_ok ()) |
|
5142
|
872 instance->reap (); |
|
|
873 } |
|
|
874 |
|
|
875 bool |
|
|
876 octave_child_list::wait (void) |
|
|
877 { |
|
|
878 return (instance_ok ()) ? instance->wait () : false; |
|
2926
|
879 } |
|
|
880 |
|
5142
|
881 class pid_equal |
|
|
882 { |
|
|
883 public: |
|
|
884 |
|
|
885 pid_equal (pid_t v) : val (v) { } |
|
|
886 |
|
|
887 bool operator () (const octave_child& oc) const { return oc.pid == val; } |
|
|
888 |
|
|
889 private: |
|
|
890 |
|
|
891 pid_t val; |
|
|
892 }; |
|
|
893 |
|
2926
|
894 void |
|
|
895 octave_child_list::remove (pid_t pid) |
|
|
896 { |
|
|
897 if (instance_ok ()) |
|
5142
|
898 instance->remove_if (pid_equal (pid)); |
|
2926
|
899 } |
|
|
900 |
|
5142
|
901 #define OCL_REP octave_child_list::octave_child_list_rep |
|
2926
|
902 |
|
5142
|
903 void |
|
|
904 OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) |
|
2926
|
905 { |
|
5142
|
906 append (octave_child (pid, f)); |
|
2926
|
907 } |
|
|
908 |
|
2209
|
909 void |
|
5142
|
910 OCL_REP::reap (void) |
|
2209
|
911 { |
|
5142
|
912 // Mark the record for PID invalid. |
|
2209
|
913 |
|
5142
|
914 for (iterator p = begin (); p != end (); p++) |
|
|
915 { |
|
|
916 // The call to the octave_child::child_event_handler might |
|
|
917 // invalidate the iterator (for example, by calling |
|
|
918 // octave_child_list::remove), so we increment the iterator |
|
|
919 // here. |
|
2209
|
920 |
|
5142
|
921 octave_child& oc = *p; |
|
2209
|
922 |
|
5142
|
923 if (oc.have_status) |
|
2209
|
924 { |
|
5142
|
925 oc.have_status = 0; |
|
|
926 |
|
|
927 octave_child::child_event_handler f = oc.handler; |
|
|
928 |
|
|
929 if (f && f (oc.pid, oc.status)) |
|
|
930 oc.pid = -1; |
|
2209
|
931 } |
|
|
932 } |
|
|
933 |
|
5142
|
934 remove_if (pid_equal (-1)); |
|
2209
|
935 } |
|
|
936 |
|
5142
|
937 // Wait on our children and record any changes in their status. |
|
|
938 |
|
|
939 bool |
|
|
940 OCL_REP::wait (void) |
|
2210
|
941 { |
|
5142
|
942 bool retval = false; |
|
2210
|
943 |
|
5142
|
944 for (iterator p = begin (); p != end (); p++) |
|
2210
|
945 { |
|
5142
|
946 octave_child& oc = *p; |
|
|
947 |
|
|
948 pid_t pid = oc.pid; |
|
|
949 |
|
|
950 if (pid > 0) |
|
|
951 { |
|
|
952 int status; |
|
2210
|
953 |
|
5142
|
954 if (waitpid (pid, &status, WNOHANG) > 0) |
|
|
955 { |
|
|
956 oc.have_status = 1; |
|
|
957 |
|
|
958 oc.status = status; |
|
|
959 |
|
|
960 retval = true; |
|
|
961 |
|
|
962 break; |
|
|
963 } |
|
2210
|
964 } |
|
|
965 } |
|
|
966 |
|
5142
|
967 return retval; |
|
2210
|
968 } |
|
|
969 |
|
4185
|
970 static int |
|
|
971 debug_on_interrupt (void) |
|
|
972 { |
|
|
973 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
974 |
|
|
975 return 0; |
|
|
976 } |
|
|
977 |
|
4449
|
978 static int |
|
|
979 sighup_dumps_octave_core (void) |
|
|
980 { |
|
|
981 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
982 |
|
|
983 return 0; |
|
|
984 } |
|
|
985 |
|
|
986 static int |
|
|
987 sigterm_dumps_octave_core (void) |
|
|
988 { |
|
|
989 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
990 |
|
|
991 return 0; |
|
|
992 } |
|
|
993 |
|
4185
|
994 void |
|
|
995 symbols_of_sighandlers (void) |
|
|
996 { |
|
4233
|
997 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
998 "-*- texinfo -*-\n\ |
|
|
999 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
1000 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
1001 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
1002 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
1003 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
1004 The default value is 0.\n\ |
|
|
1005 @end defvr"); |
|
4294
|
1006 |
|
4449
|
1007 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
1008 "-*- texinfo -*-\n\ |
|
|
1009 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
1010 If this variable is set to a nonzero value and\n\ |
|
|
1011 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
1012 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
1013 hangup signal. The default value is 1.\n\ |
|
|
1014 @end defvr"); |
|
|
1015 |
|
|
1016 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
1017 "-*- texinfo -*-\n\ |
|
|
1018 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
1019 If this variable is set to a nonzero value and\n\ |
|
|
1020 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
1021 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
1022 terminate signal. The default value is 1.\n\ |
|
|
1023 @end defvr"); |
|
|
1024 |
|
4294
|
1025 DEFCONST (SIG, make_sig_struct (), |
|
|
1026 "-*- texinfo -*-\n\ |
|
5333
|
1027 @defvr {Built-in Constant} SIG\n\ |
|
4294
|
1028 Structure of Unix signal names and their defined values.\n\ |
|
|
1029 @end defvr"); |
|
4185
|
1030 } |
|
|
1031 |
|
1
|
1032 /* |
|
|
1033 ;;; Local Variables: *** |
|
|
1034 ;;; mode: C++ *** |
|
|
1035 ;;; End: *** |
|
|
1036 */ |
