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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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5453
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41 #include "oct-syscalls.h" |
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4153
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42 #include "quit.h" |
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3281
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43 |
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4185
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44 #include "defun.h" |
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1352
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45 #include "error.h" |
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1373
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46 #include "load-save.h" |
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4294
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47 #include "oct-map.h" |
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2091
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48 #include "pager.h" |
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4185
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49 #include "pt-bp.h" |
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1
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50 #include "sighandlers.h" |
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4787
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51 #include "sysdep.h" |
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1352
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52 #include "syswait.h" |
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2091
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53 #include "toplev.h" |
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1
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54 #include "utils.h" |
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55 |
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56 // Nonzero means we have already printed a message for this series of |
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57 // SIGPIPES. We assume that the writer will eventually give up. |
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58 int pipe_handler_error_count = 0; |
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59 |
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3018
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60 // TRUE means we can be interrupted. |
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61 bool can_interrupt = false; |
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1
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62 |
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4185
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63 // TRUE means we should try to enter the debugger on SIGINT. |
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64 static bool Vdebug_on_interrupt = false; |
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65 |
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4449
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66 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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67 // closing gnome-terminal, for example). Note that this variable has |
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68 // no effect if Vcrash_dumps_octave_core is FALSE. |
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69 static bool Vsighup_dumps_octave_core; |
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70 |
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71 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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72 static bool Vsigterm_dumps_octave_core; |
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73 |
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2469
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74 #if RETSIGTYPE == void |
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75 #define SIGHANDLER_RETURN(status) return |
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76 #else |
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77 #define SIGHANDLER_RETURN(status) return status |
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78 #endif |
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79 |
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2554
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80 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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81 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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82 octave_set_signal_handler (sig, handler) |
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2931
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83 #define REINSTALL_USES_SIG 1 |
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2554
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84 #else |
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85 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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86 do { } while (0) |
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87 #endif |
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88 |
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89 #if defined (__EMX__) |
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2626
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90 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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91 octave_set_signal_handler (sig, SIG_ACK) |
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2931
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92 #define ACK_USES_SIG 1 |
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2554
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93 #else |
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2626
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94 #define MAYBE_ACK_SIGNAL(sig) \ |
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2554
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95 do { } while (0) |
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96 #endif |
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97 |
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5142
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98 // List of signals we have caught since last call to octave_signal_handler. |
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99 static bool octave_signals_caught[NSIG]; |
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100 |
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101 // Called from OCTAVE_QUIT to actually do something about the signals |
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102 // we have caught. |
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103 |
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104 void |
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105 octave_signal_handler (void) |
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106 { |
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107 // The list of signals is relatively short, so we will just go |
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108 // linearly through the list. |
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109 |
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110 for (int i = 0; i < NSIG; i++) |
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111 { |
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112 if (octave_signals_caught[i]) |
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113 { |
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114 octave_signals_caught[i] = false; |
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115 |
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116 switch (i) |
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117 { |
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5451
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118 #ifdef SIGCHLD |
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5142
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119 case SIGCHLD: |
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120 octave_child_list::reap (); |
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121 break; |
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5451
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122 #endif |
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5142
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123 |
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124 case SIGFPE: |
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125 std::cerr << "warning: floating point exception -- trying to return to prompt" << std::endl; |
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126 break; |
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127 |
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5451
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128 #ifdef SIGPIPE |
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5142
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129 case SIGPIPE: |
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130 std::cerr << "warning: broken pipe -- some output may be lost" << std::endl; |
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131 break; |
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5451
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132 #endif |
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5142
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133 } |
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134 } |
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135 } |
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136 } |
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137 |
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1
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138 static void |
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4787
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139 my_friendly_exit (const char *sig_name, int sig_number, |
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140 bool save_vars = true) |
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1
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141 { |
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2536
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142 static bool been_there_done_that = false; |
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143 |
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144 if (been_there_done_that) |
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145 { |
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2554
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146 #if defined (SIGABRT) |
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2536
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147 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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148 #endif |
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149 |
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3644
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150 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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5451
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151 |
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152 MINGW_SIGNAL_CLEANUP (); |
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153 |
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2536
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154 abort (); |
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155 } |
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156 else |
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157 { |
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158 been_there_done_that = true; |
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1373
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159 |
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3644
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160 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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2536
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161 |
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4787
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162 if (save_vars) |
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4791
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163 dump_octave_core (); |
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2536
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164 |
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3162
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165 if (sig_number < 0) |
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5451
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166 { |
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167 MINGW_SIGNAL_CLEANUP (); |
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168 |
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169 exit (1); |
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170 } |
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3162
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171 else |
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172 { |
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173 octave_set_signal_handler (sig_number, SIG_DFL); |
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174 |
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4092
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175 #if defined (HAVE_RAISE) |
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176 raise (sig_number); |
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177 #elif defined (HAVE_KILL) |
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3162
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178 kill (getpid (), sig_number); |
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4092
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179 #else |
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180 exit (1); |
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181 #endif |
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3162
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182 } |
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4092
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183 |
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2536
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184 } |
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1
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185 } |
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186 |
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1446
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187 sig_handler * |
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5770
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188 octave_set_signal_handler (int sig, sig_handler *handler, |
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189 bool restart_syscalls) |
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1446
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190 { |
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191 #if defined (HAVE_POSIX_SIGNALS) |
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192 struct sigaction act, oact; |
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5144
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193 |
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1446
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194 act.sa_handler = handler; |
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195 act.sa_flags = 0; |
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5144
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196 |
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197 if (sig == SIGALRM) |
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198 { |
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199 #if defined (SA_INTERRUPT) |
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200 act.sa_flags |= SA_INTERRUPT; |
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201 #endif |
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202 } |
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203 #if defined (SA_RESTART) |
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5775
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204 // FIXME -- Do we also need to explicitly disable SA_RESTART? |
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5770
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205 else if (restart_syscalls) |
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206 act.sa_flags |= SA_RESTART; |
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5144
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207 #endif |
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208 |
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1446
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209 sigemptyset (&act.sa_mask); |
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210 sigemptyset (&oact.sa_mask); |
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5144
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211 |
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1446
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212 sigaction (sig, &act, &oact); |
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5144
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213 |
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1446
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214 return oact.sa_handler; |
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215 #else |
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216 return signal (sig, handler); |
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217 #endif |
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218 } |
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219 |
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1
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220 static RETSIGTYPE |
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1446
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221 generic_sig_handler (int sig) |
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1
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222 { |
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1446
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223 my_friendly_exit (sys_siglist[sig], sig); |
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1
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224 |
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2469
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225 SIGHANDLER_RETURN (0); |
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1
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226 } |
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227 |
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2091
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228 // Handle SIGCHLD. |
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1230
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229 |
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4064
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230 #ifdef SIGCHLD |
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1230
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231 static RETSIGTYPE |
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2092
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232 sigchld_handler (int /* sig */) |
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1230
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233 { |
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2705
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234 volatile octave_interrupt_handler saved_interrupt_handler |
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2554
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235 = octave_ignore_interrupts (); |
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236 |
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2626
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237 // I wonder if this is really right, or if SIGCHLD should just be |
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238 // blocked on OS/2 systems the same as for systems with POSIX signal |
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239 // functions. |
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240 |
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241 #if defined (__EMX__) |
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2554
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242 volatile sig_handler *saved_sigchld_handler |
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2626
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243 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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2554
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244 #endif |
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245 |
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2626
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246 sigset_t set, oset; |
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247 |
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248 BLOCK_CHILD (set, oset); |
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249 |
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5142
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250 if (octave_child_list::wait ()) |
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2554
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251 { |
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5142
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252 // The status of some child changed. |
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2209
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253 |
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5142
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254 octave_signal_caught = 1; |
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2197
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255 |
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5142
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256 octave_signals_caught[SIGCHLD] = true; |
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1230
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257 } |
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2469
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258 |
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2600
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259 octave_set_interrupt_handler (saved_interrupt_handler); |
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2554
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260 |
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2626
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261 UNBLOCK_CHILD (oset); |
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262 |
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263 #ifdef __EMX__ |
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2554
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264 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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2475
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265 #endif |
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266 |
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2626
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267 MAYBE_ACK_SIGNAL (SIGCHLD); |
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2554
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268 |
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269 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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270 |
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2469
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271 SIGHANDLER_RETURN (0); |
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1230
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272 } |
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4064
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273 #endif /* defined(SIGCHLD) */ |
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1230
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274 |
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4064
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275 #ifdef SIGFPE |
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1373
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276 #if defined (__alpha__) |
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277 static RETSIGTYPE |
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1488
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278 sigfpe_handler (int /* sig */) |
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1373
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279 { |
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2626
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280 MAYBE_ACK_SIGNAL (SIGFPE); |
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2554
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281 |
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282 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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1373
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283 |
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5142
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284 if (can_interrupt && octave_interrupt_state >= 0) |
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285 { |
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286 octave_signal_caught = 1; |
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1373
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287 |
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5142
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288 octave_signals_caught[SIGFPE] = true; |
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4182
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289 |
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5142
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290 octave_interrupt_state++; |
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291 } |
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1373
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292 |
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2469
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293 SIGHANDLER_RETURN (0); |
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1373
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294 } |
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4064
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295 #endif /* defined(__alpha__) */ |
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296 #endif /* defined(SIGFPE) */ |
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1373
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297 |
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4449
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298 #if defined (SIGHUP) || defined (SIGTERM) |
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299 static RETSIGTYPE |
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300 sig_hup_or_term_handler (int sig) |
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301 { |
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302 MAYBE_ACK_SIGNAL (sig); |
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303 |
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304 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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305 |
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306 switch (sig) |
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307 { |
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308 #if defined (SIGHUP) |
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309 case SIGHUP: |
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310 { |
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311 if (Vsighup_dumps_octave_core) |
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4791
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312 dump_octave_core (); |
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4449
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313 } |
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314 break; |
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315 #endif |
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316 |
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317 #if defined (SIGTERM) |
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318 case SIGTERM: |
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319 { |
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320 if (Vsigterm_dumps_octave_core) |
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4791
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321 dump_octave_core (); |
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4449
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322 } |
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323 break; |
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324 #endif |
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325 |
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326 default: |
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327 break; |
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328 } |
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329 |
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330 clean_up_and_exit (0); |
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331 |
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332 SIGHANDLER_RETURN (0); |
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333 } |
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334 #endif |
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335 |
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3343
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336 #if 0 |
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3281
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337 #if defined (SIGWINCH) |
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338 static RETSIGTYPE |
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339 sigwinch_handler (int /* sig */) |
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340 { |
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341 MAYBE_ACK_SIGNAL (SIGWINCH); |
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342 |
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343 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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344 |
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345 command_editor::resize_terminal (); |
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346 |
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347 SIGHANDLER_RETURN (0); |
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348 } |
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349 #endif |
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3343
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350 #endif |
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3281
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351 |
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635
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352 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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353 // |
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354 // This also has to work for SIGBREAK (on systems that have it), so we |
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355 // use the value of sig, instead of just assuming that it is called |
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356 // for SIGINT only. |
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635
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357 |
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5451
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358 static |
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359 void user_abort(const char *sig_name, int sig_number) |
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1
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360 { |
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4172
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361 if (! octave_initialized) |
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362 exit (1); |
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363 |
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1
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364 if (can_interrupt) |
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365 { |
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4185
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366 if (Vdebug_on_interrupt) |
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367 { |
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368 if (! octave_debug_on_interrupt_state) |
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369 { |
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370 octave_debug_on_interrupt_state = true; |
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371 |
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5451
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372 return; |
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4185
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373 } |
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374 else |
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375 // Clear the flag and do normal interrupt stuff. |
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376 octave_debug_on_interrupt_state = false; |
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377 } |
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378 |
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4153
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379 if (octave_interrupt_immediately) |
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380 octave_jump_to_enclosing_context (); |
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4429
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381 else |
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4787
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382 { |
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4793
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383 // If we are already cleaning up from a previous interrupt, |
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384 // take note of the fact that another interrupt signal has |
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385 // arrived. |
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386 |
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387 if (octave_interrupt_state < 0) |
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388 octave_interrupt_state = 0; |
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389 |
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5142
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390 octave_signal_caught = 1; |
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4787
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391 octave_interrupt_state++; |
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392 |
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4791
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393 if (interactive && octave_interrupt_state == 2) |
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394 std::cerr << "Press Control-C again to abort." << std::endl; |
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4787
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395 |
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4791
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396 if (octave_interrupt_state >= 3) |
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5451
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397 my_friendly_exit (sig_name, sig_number, true); |
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4787
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398 } |
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1
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399 } |
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400 |
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5451
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401 } |
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402 |
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403 static RETSIGTYPE |
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404 sigint_handler (int sig) |
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405 { |
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406 MAYBE_ACK_SIGNAL (sig); |
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407 |
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408 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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409 |
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410 #ifdef USE_W32_SIGINT |
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411 if (w32_in_main_thread ()) |
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412 user_abort (sys_siglist[sig], sig); |
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413 else |
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414 w32_raise (sig); |
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415 #else |
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416 user_abort (sys_siglist[sig], sig); |
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417 #endif |
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418 |
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2469
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419 SIGHANDLER_RETURN (0); |
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1
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420 } |
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421 |
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4064
|
422 #ifdef SIGPIPE |
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1
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423 static RETSIGTYPE |
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1488
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424 sigpipe_handler (int /* sig */) |
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1
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425 { |
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2626
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426 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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427 |
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428 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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429 |
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5142
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430 octave_signal_caught = 1; |
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431 |
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432 octave_signals_caught[SIGPIPE] = true; |
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1
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433 |
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1358
|
434 // Don't loop forever on account of this. |
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435 |
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5142
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436 if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) |
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4787
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437 octave_interrupt_state++; |
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1
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438 |
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2469
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439 SIGHANDLER_RETURN (0); |
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1
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440 } |
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4064
|
441 #endif /* defined(SIGPIPE) */ |
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1
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442 |
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5451
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443 #ifdef USE_W32_SIGINT |
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444 static BOOL CALLBACK |
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445 w32_sigint_handler (DWORD sig) |
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446 { |
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447 const char *sig_name; |
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448 |
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449 switch(sig) |
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450 { |
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451 case CTRL_BREAK_EVENT: |
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452 sig_name = "Ctrl-Break"; |
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453 break; |
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454 case CTRL_C_EVENT: |
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455 sig_name = "Ctrl-C"; |
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|
456 break; |
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457 case CTRL_CLOSE_EVENT: |
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|
458 sig_name = "close console"; |
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|
459 break; |
|
|
460 case CTRL_LOGOFF_EVENT: |
|
|
461 sig_name = "logoff"; |
|
|
462 break; |
|
|
463 case CTRL_SHUTDOWN_EVENT: |
|
|
464 sig_name = "shutdown"; |
|
|
465 break; |
|
|
466 default: |
|
|
467 sig_name = "unknown console event"; |
|
|
468 break; |
|
|
469 } |
|
|
470 |
|
|
471 switch(sig) |
|
|
472 { |
|
|
473 case CTRL_BREAK_EVENT: |
|
|
474 case CTRL_C_EVENT: |
|
|
475 w32_raise (SIGINT); |
|
|
476 break; |
|
|
477 |
|
|
478 case CTRL_CLOSE_EVENT: |
|
|
479 case CTRL_LOGOFF_EVENT: |
|
|
480 case CTRL_SHUTDOWN_EVENT: |
|
|
481 default: |
|
|
482 // We should do the following: |
|
|
483 // clean_up_and_exit (0); |
|
|
484 // We can't because we aren't running in the normal Octave thread. |
|
|
485 user_abort(sig_name, sig); |
|
|
486 break; |
|
|
487 } |
|
|
488 |
|
|
489 // Return TRUE if the event was handled, or FALSE if another handler |
|
|
490 // should be called. |
|
5775
|
491 // FIXME check that windows terminates the thread. |
|
5451
|
492 return TRUE; |
|
|
493 } |
|
|
494 #endif /* w32_sigint_handler */ |
|
|
495 |
|
|
496 |
|
2705
|
497 octave_interrupt_handler |
|
2554
|
498 octave_catch_interrupts (void) |
|
|
499 { |
|
2705
|
500 octave_interrupt_handler retval; |
|
2554
|
501 |
|
|
502 #ifdef SIGINT |
|
2705
|
503 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
|
2554
|
504 #endif |
|
|
505 |
|
|
506 #ifdef SIGBREAK |
|
2705
|
507 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
|
2554
|
508 #endif |
|
2705
|
509 |
|
5451
|
510 #ifdef USE_W32_SIGINT |
|
|
511 |
|
|
512 // Intercept windows console control events. |
|
|
513 // Note that the windows console signal handlers chain, so if |
|
|
514 // install_signal_handlers is called more than once in the same program, |
|
|
515 // then first call the following to avoid duplicates: |
|
|
516 // |
|
|
517 // SetConsoleCtrlHandler (w32_sigint_handler, FALSE); |
|
|
518 |
|
|
519 if (! SetConsoleCtrlHandler (w32_sigint_handler, TRUE)) |
|
|
520 error ("SetConsoleCtrlHandler failed with %ld\n", GetLastError ()); |
|
|
521 |
|
|
522 w32_set_quiet_shutdown (); |
|
|
523 |
|
|
524 #endif |
|
|
525 |
|
2705
|
526 return retval; |
|
2554
|
527 } |
|
|
528 |
|
2705
|
529 octave_interrupt_handler |
|
|
530 octave_ignore_interrupts (void) |
|
2554
|
531 { |
|
2705
|
532 octave_interrupt_handler retval; |
|
|
533 |
|
2554
|
534 #ifdef SIGINT |
|
2705
|
535 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
2554
|
536 #endif |
|
|
537 |
|
|
538 #ifdef SIGBREAK |
|
2705
|
539 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
|
2554
|
540 #endif |
|
2705
|
541 |
|
|
542 return retval; |
|
|
543 } |
|
|
544 |
|
|
545 octave_interrupt_handler |
|
5770
|
546 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h, |
|
|
547 bool restart_syscalls) |
|
2705
|
548 { |
|
|
549 octave_interrupt_handler retval; |
|
|
550 |
|
|
551 #ifdef SIGINT |
|
5770
|
552 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler, |
|
|
553 restart_syscalls); |
|
2705
|
554 #endif |
|
|
555 |
|
|
556 #ifdef SIGBREAK |
|
5770
|
557 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler, |
|
|
558 restart_syscalls); |
|
2705
|
559 #endif |
|
|
560 |
|
|
561 return retval; |
|
1651
|
562 } |
|
|
563 |
|
635
|
564 // Install all the handlers for the signals we might care about. |
|
|
565 |
|
1
|
566 void |
|
|
567 install_signal_handlers (void) |
|
|
568 { |
|
5142
|
569 for (int i = 0; i < NSIG; i++) |
|
|
570 octave_signals_caught[i] = false; |
|
|
571 |
|
2554
|
572 octave_catch_interrupts (); |
|
|
573 |
|
1
|
574 #ifdef SIGABRT |
|
1446
|
575 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
|
1
|
576 #endif |
|
|
577 |
|
|
578 #ifdef SIGALRM |
|
1446
|
579 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
|
1
|
580 #endif |
|
|
581 |
|
|
582 #ifdef SIGBUS |
|
1446
|
583 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
|
1
|
584 #endif |
|
|
585 |
|
1230
|
586 #ifdef SIGCHLD |
|
1446
|
587 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
|
1230
|
588 #endif |
|
|
589 |
|
3174
|
590 // SIGCLD |
|
|
591 // SIGCONT |
|
|
592 |
|
1
|
593 #ifdef SIGEMT |
|
1446
|
594 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
|
1
|
595 #endif |
|
|
596 |
|
|
597 #ifdef SIGFPE |
|
1373
|
598 #if defined (__alpha__) |
|
1446
|
599 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
|
1373
|
600 #else |
|
1446
|
601 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
|
1
|
602 #endif |
|
1373
|
603 #endif |
|
1
|
604 |
|
|
605 #ifdef SIGHUP |
|
4449
|
606 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
|
1
|
607 #endif |
|
|
608 |
|
|
609 #ifdef SIGILL |
|
1446
|
610 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
611 #endif |
|
|
612 |
|
3174
|
613 // SIGINFO |
|
|
614 // SIGINT |
|
|
615 |
|
1
|
616 #ifdef SIGIOT |
|
1446
|
617 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
618 #endif |
|
|
619 |
|
|
620 #ifdef SIGLOST |
|
1446
|
621 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
622 #endif |
|
|
623 |
|
|
624 #ifdef SIGPIPE |
|
1446
|
625 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
626 #endif |
|
|
627 |
|
|
628 #ifdef SIGPOLL |
|
1446
|
629 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
630 #endif |
|
|
631 |
|
|
632 #ifdef SIGPROF |
|
1446
|
633 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
634 #endif |
|
|
635 |
|
3174
|
636 // SIGPWR |
|
|
637 |
|
1
|
638 #ifdef SIGQUIT |
|
1446
|
639 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
640 #endif |
|
|
641 |
|
|
642 #ifdef SIGSEGV |
|
1446
|
643 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
644 #endif |
|
|
645 |
|
3174
|
646 // SIGSTOP |
|
|
647 |
|
1
|
648 #ifdef SIGSYS |
|
1446
|
649 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
650 #endif |
|
|
651 |
|
|
652 #ifdef SIGTERM |
|
4449
|
653 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
654 #endif |
|
|
655 |
|
|
656 #ifdef SIGTRAP |
|
1446
|
657 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
658 #endif |
|
|
659 |
|
3174
|
660 // SIGTSTP |
|
|
661 // SIGTTIN |
|
|
662 // SIGTTOU |
|
|
663 // SIGURG |
|
|
664 |
|
1
|
665 #ifdef SIGUSR1 |
|
1446
|
666 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
667 #endif |
|
|
668 |
|
|
669 #ifdef SIGUSR2 |
|
1446
|
670 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
671 #endif |
|
|
672 |
|
|
673 #ifdef SIGVTALRM |
|
1446
|
674 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
675 #endif |
|
|
676 |
|
895
|
677 #ifdef SIGIO |
|
1446
|
678 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
679 #endif |
|
|
680 |
|
3343
|
681 #if 0 |
|
3281
|
682 #ifdef SIGWINCH |
|
|
683 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
684 #endif |
|
3343
|
685 #endif |
|
3174
|
686 |
|
1
|
687 #ifdef SIGXCPU |
|
1446
|
688 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
689 #endif |
|
|
690 |
|
|
691 #ifdef SIGXFSZ |
|
1446
|
692 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
693 #endif |
|
5451
|
694 |
|
1
|
695 } |
|
|
696 |
|
4294
|
697 static Octave_map |
|
|
698 make_sig_struct (void) |
|
|
699 { |
|
|
700 Octave_map m; |
|
|
701 |
|
|
702 #ifdef SIGABRT |
|
4675
|
703 m.assign ("ABRT", SIGABRT); |
|
4294
|
704 #endif |
|
|
705 |
|
|
706 #ifdef SIGALRM |
|
4675
|
707 m.assign ("ALRM", SIGALRM); |
|
4294
|
708 #endif |
|
|
709 |
|
|
710 #ifdef SIGBUS |
|
4675
|
711 m.assign ("BUS", SIGBUS); |
|
4294
|
712 #endif |
|
|
713 |
|
|
714 #ifdef SIGCHLD |
|
4675
|
715 m.assign ("CHLD", SIGCHLD); |
|
4294
|
716 #endif |
|
|
717 |
|
|
718 #ifdef SIGCLD |
|
4675
|
719 m.assign ("CLD", SIGCLD); |
|
4294
|
720 #endif |
|
|
721 |
|
|
722 #ifdef SIGCONT |
|
4675
|
723 m.assign ("CONT", SIGCONT); |
|
4294
|
724 #endif |
|
|
725 |
|
|
726 #ifdef SIGEMT |
|
4675
|
727 m.assign ("EMT", SIGEMT); |
|
4294
|
728 #endif |
|
|
729 |
|
|
730 #ifdef SIGFPE |
|
4675
|
731 m.assign ("FPE", SIGFPE); |
|
4294
|
732 #endif |
|
|
733 |
|
|
734 #ifdef SIGHUP |
|
4675
|
735 m.assign ("HUP", SIGHUP); |
|
4294
|
736 #endif |
|
|
737 |
|
|
738 #ifdef SIGILL |
|
4675
|
739 m.assign ("ILL", SIGILL); |
|
4294
|
740 #endif |
|
|
741 |
|
|
742 #ifdef SIGINFO |
|
4675
|
743 m.assign ("INFO", SIGINFO); |
|
4294
|
744 #endif |
|
|
745 |
|
|
746 #ifdef SIGINT |
|
4675
|
747 m.assign ("INT", SIGINT); |
|
4294
|
748 #endif |
|
|
749 |
|
|
750 #ifdef SIGIOT |
|
4675
|
751 m.assign ("IOT", SIGIOT); |
|
4294
|
752 #endif |
|
|
753 |
|
|
754 #ifdef SIGLOST |
|
4675
|
755 m.assign ("LOST", SIGLOST); |
|
4294
|
756 #endif |
|
|
757 |
|
|
758 #ifdef SIGPIPE |
|
4675
|
759 m.assign ("PIPE", SIGPIPE); |
|
4294
|
760 #endif |
|
|
761 |
|
|
762 #ifdef SIGPOLL |
|
4675
|
763 m.assign ("POLL", SIGPOLL); |
|
4294
|
764 #endif |
|
|
765 |
|
|
766 #ifdef SIGPROF |
|
4675
|
767 m.assign ("PROF", SIGPROF); |
|
4294
|
768 #endif |
|
|
769 |
|
|
770 #ifdef SIGPWR |
|
4675
|
771 m.assign ("PWR", SIGPWR); |
|
4294
|
772 #endif |
|
|
773 |
|
|
774 #ifdef SIGQUIT |
|
4675
|
775 m.assign ("QUIT", SIGQUIT); |
|
4294
|
776 #endif |
|
|
777 |
|
|
778 #ifdef SIGSEGV |
|
4675
|
779 m.assign ("SEGV", SIGSEGV); |
|
4294
|
780 #endif |
|
|
781 |
|
|
782 #ifdef SIGSTOP |
|
4675
|
783 m.assign ("STOP", SIGSTOP); |
|
4294
|
784 #endif |
|
|
785 |
|
|
786 #ifdef SIGSYS |
|
4675
|
787 m.assign ("SYS", SIGSYS); |
|
4294
|
788 #endif |
|
|
789 |
|
|
790 #ifdef SIGTERM |
|
4675
|
791 m.assign ("TERM", SIGTERM); |
|
4294
|
792 #endif |
|
|
793 |
|
|
794 #ifdef SIGTRAP |
|
4675
|
795 m.assign ("TRAP", SIGTRAP); |
|
4294
|
796 #endif |
|
|
797 |
|
|
798 #ifdef SIGTSTP |
|
4675
|
799 m.assign ("TSTP", SIGTSTP); |
|
4294
|
800 #endif |
|
|
801 |
|
|
802 #ifdef SIGTTIN |
|
4675
|
803 m.assign ("TTIN", SIGTTIN); |
|
4294
|
804 #endif |
|
|
805 |
|
|
806 #ifdef SIGTTOU |
|
4675
|
807 m.assign ("TTOU", SIGTTOU); |
|
4294
|
808 #endif |
|
|
809 |
|
|
810 #ifdef SIGURG |
|
4675
|
811 m.assign ("URG", SIGURG); |
|
4294
|
812 #endif |
|
|
813 |
|
|
814 #ifdef SIGUSR1 |
|
4675
|
815 m.assign ("USR1", SIGUSR1); |
|
4294
|
816 #endif |
|
|
817 |
|
|
818 #ifdef SIGUSR2 |
|
4675
|
819 m.assign ("USR2", SIGUSR2); |
|
4294
|
820 #endif |
|
|
821 |
|
|
822 #ifdef SIGVTALRM |
|
4675
|
823 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
824 #endif |
|
|
825 |
|
|
826 #ifdef SIGIO |
|
4675
|
827 m.assign ("IO", SIGIO); |
|
4294
|
828 #endif |
|
|
829 |
|
|
830 #ifdef SIGWINCH |
|
4675
|
831 m.assign ("WINCH", SIGWINCH); |
|
4294
|
832 #endif |
|
|
833 |
|
|
834 #ifdef SIGXCPU |
|
4675
|
835 m.assign ("XCPU", SIGXCPU); |
|
4294
|
836 #endif |
|
|
837 |
|
|
838 #ifdef SIGXFSZ |
|
4675
|
839 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
840 #endif |
|
|
841 |
|
|
842 return m; |
|
|
843 } |
|
|
844 |
|
5142
|
845 octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; |
|
5128
|
846 |
|
2926
|
847 bool |
|
|
848 octave_child_list::instance_ok (void) |
|
|
849 { |
|
|
850 bool retval = true; |
|
|
851 |
|
|
852 if (! instance) |
|
5142
|
853 instance = new octave_child_list_rep (); |
|
2926
|
854 |
|
|
855 if (! instance) |
|
|
856 { |
|
|
857 ::error ("unable to create child list object!"); |
|
|
858 |
|
|
859 retval = false; |
|
|
860 } |
|
|
861 |
|
|
862 return retval; |
|
|
863 } |
|
|
864 |
|
|
865 void |
|
5142
|
866 octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) |
|
|
867 { |
|
|
868 if (instance_ok ()) |
|
|
869 instance->insert (pid, f); |
|
|
870 } |
|
|
871 |
|
|
872 void |
|
|
873 octave_child_list::reap (void) |
|
2926
|
874 { |
|
|
875 if (instance_ok ()) |
|
5142
|
876 instance->reap (); |
|
|
877 } |
|
|
878 |
|
|
879 bool |
|
|
880 octave_child_list::wait (void) |
|
|
881 { |
|
|
882 return (instance_ok ()) ? instance->wait () : false; |
|
2926
|
883 } |
|
|
884 |
|
5142
|
885 class pid_equal |
|
|
886 { |
|
|
887 public: |
|
|
888 |
|
|
889 pid_equal (pid_t v) : val (v) { } |
|
|
890 |
|
|
891 bool operator () (const octave_child& oc) const { return oc.pid == val; } |
|
|
892 |
|
|
893 private: |
|
|
894 |
|
|
895 pid_t val; |
|
|
896 }; |
|
|
897 |
|
2926
|
898 void |
|
|
899 octave_child_list::remove (pid_t pid) |
|
|
900 { |
|
|
901 if (instance_ok ()) |
|
5142
|
902 instance->remove_if (pid_equal (pid)); |
|
2926
|
903 } |
|
|
904 |
|
5142
|
905 #define OCL_REP octave_child_list::octave_child_list_rep |
|
2926
|
906 |
|
5142
|
907 void |
|
|
908 OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) |
|
2926
|
909 { |
|
5142
|
910 append (octave_child (pid, f)); |
|
2926
|
911 } |
|
|
912 |
|
2209
|
913 void |
|
5142
|
914 OCL_REP::reap (void) |
|
2209
|
915 { |
|
5142
|
916 // Mark the record for PID invalid. |
|
2209
|
917 |
|
5142
|
918 for (iterator p = begin (); p != end (); p++) |
|
|
919 { |
|
|
920 // The call to the octave_child::child_event_handler might |
|
|
921 // invalidate the iterator (for example, by calling |
|
|
922 // octave_child_list::remove), so we increment the iterator |
|
|
923 // here. |
|
2209
|
924 |
|
5142
|
925 octave_child& oc = *p; |
|
2209
|
926 |
|
5142
|
927 if (oc.have_status) |
|
2209
|
928 { |
|
5142
|
929 oc.have_status = 0; |
|
|
930 |
|
|
931 octave_child::child_event_handler f = oc.handler; |
|
|
932 |
|
|
933 if (f && f (oc.pid, oc.status)) |
|
|
934 oc.pid = -1; |
|
2209
|
935 } |
|
|
936 } |
|
|
937 |
|
5142
|
938 remove_if (pid_equal (-1)); |
|
2209
|
939 } |
|
|
940 |
|
5142
|
941 // Wait on our children and record any changes in their status. |
|
|
942 |
|
|
943 bool |
|
|
944 OCL_REP::wait (void) |
|
2210
|
945 { |
|
5142
|
946 bool retval = false; |
|
2210
|
947 |
|
5142
|
948 for (iterator p = begin (); p != end (); p++) |
|
2210
|
949 { |
|
5142
|
950 octave_child& oc = *p; |
|
|
951 |
|
|
952 pid_t pid = oc.pid; |
|
|
953 |
|
|
954 if (pid > 0) |
|
|
955 { |
|
|
956 int status; |
|
2210
|
957 |
|
5453
|
958 if (octave_syscalls::waitpid (pid, &status, WNOHANG) > 0) |
|
5142
|
959 { |
|
|
960 oc.have_status = 1; |
|
|
961 |
|
|
962 oc.status = status; |
|
|
963 |
|
|
964 retval = true; |
|
|
965 |
|
|
966 break; |
|
|
967 } |
|
2210
|
968 } |
|
|
969 } |
|
|
970 |
|
5142
|
971 return retval; |
|
2210
|
972 } |
|
|
973 |
|
4185
|
974 static int |
|
|
975 debug_on_interrupt (void) |
|
|
976 { |
|
|
977 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
978 |
|
|
979 return 0; |
|
|
980 } |
|
|
981 |
|
4449
|
982 static int |
|
|
983 sighup_dumps_octave_core (void) |
|
|
984 { |
|
|
985 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
986 |
|
|
987 return 0; |
|
|
988 } |
|
|
989 |
|
|
990 static int |
|
|
991 sigterm_dumps_octave_core (void) |
|
|
992 { |
|
|
993 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
994 |
|
|
995 return 0; |
|
|
996 } |
|
|
997 |
|
4185
|
998 void |
|
|
999 symbols_of_sighandlers (void) |
|
|
1000 { |
|
4233
|
1001 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
1002 "-*- texinfo -*-\n\ |
|
|
1003 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
1004 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
1005 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
1006 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
1007 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
1008 The default value is 0.\n\ |
|
|
1009 @end defvr"); |
|
4294
|
1010 |
|
4449
|
1011 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
1012 "-*- texinfo -*-\n\ |
|
|
1013 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
1014 If this variable is set to a nonzero value and\n\ |
|
|
1015 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
1016 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
1017 hangup signal. The default value is 1.\n\ |
|
|
1018 @end defvr"); |
|
|
1019 |
|
|
1020 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
1021 "-*- texinfo -*-\n\ |
|
|
1022 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
1023 If this variable is set to a nonzero value and\n\ |
|
|
1024 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
1025 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
1026 terminate signal. The default value is 1.\n\ |
|
|
1027 @end defvr"); |
|
|
1028 |
|
4294
|
1029 DEFCONST (SIG, make_sig_struct (), |
|
|
1030 "-*- texinfo -*-\n\ |
|
5333
|
1031 @defvr {Built-in Constant} SIG\n\ |
|
4294
|
1032 Structure of Unix signal names and their defined values.\n\ |
|
|
1033 @end defvr"); |
|
4185
|
1034 } |
|
|
1035 |
|
1
|
1036 /* |
|
|
1037 ;;; Local Variables: *** |
|
|
1038 ;;; mode: C++ *** |
|
|
1039 ;;; End: *** |
|
|
1040 */ |
