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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1230
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24 #include <config.h> |
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25 #endif |
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26 |
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2536
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27 #include <cstdlib> |
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28 |
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3503
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29 #include <iostream> |
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1344
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30 #include <new> |
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31 |
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1350
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32 #ifdef HAVE_UNISTD_H |
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2442
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33 #ifdef HAVE_SYS_TYPES_H |
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834
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34 #include <sys/types.h> |
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35 #endif |
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36 #include <unistd.h> |
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37 #endif |
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38 |
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39 #include "cmd-edit.h" |
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4153
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40 #include "quit.h" |
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41 |
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4185
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42 #include "defun.h" |
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1352
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43 #include "error.h" |
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1373
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44 #include "load-save.h" |
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4294
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45 #include "oct-map.h" |
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2091
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46 #include "pager.h" |
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4185
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47 #include "pt-bp.h" |
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48 #include "sighandlers.h" |
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4787
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49 #include "sysdep.h" |
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1352
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50 #include "syswait.h" |
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2091
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51 #include "toplev.h" |
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1
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52 #include "utils.h" |
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53 |
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54 // Nonzero means we have already printed a message for this series of |
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55 // SIGPIPES. We assume that the writer will eventually give up. |
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56 int pipe_handler_error_count = 0; |
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57 |
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3018
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58 // TRUE means we can be interrupted. |
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59 bool can_interrupt = false; |
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60 |
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4185
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61 // TRUE means we should try to enter the debugger on SIGINT. |
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62 static bool Vdebug_on_interrupt = false; |
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63 |
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4449
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64 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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65 // closing gnome-terminal, for example). Note that this variable has |
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66 // no effect if Vcrash_dumps_octave_core is FALSE. |
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67 static bool Vsighup_dumps_octave_core; |
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68 |
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69 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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70 static bool Vsigterm_dumps_octave_core; |
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71 |
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2469
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72 #if RETSIGTYPE == void |
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73 #define SIGHANDLER_RETURN(status) return |
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74 #else |
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75 #define SIGHANDLER_RETURN(status) return status |
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76 #endif |
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77 |
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2554
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78 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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79 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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80 octave_set_signal_handler (sig, handler) |
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2931
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81 #define REINSTALL_USES_SIG 1 |
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2554
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82 #else |
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83 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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84 do { } while (0) |
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85 #endif |
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86 |
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87 #if defined (__EMX__) |
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88 #define MAYBE_ACK_SIGNAL(sig) \ |
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89 octave_set_signal_handler (sig, SIG_ACK) |
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90 #define ACK_USES_SIG 1 |
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91 #else |
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92 #define MAYBE_ACK_SIGNAL(sig) \ |
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93 do { } while (0) |
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94 #endif |
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95 |
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96 static void |
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97 my_friendly_exit (const char *sig_name, int sig_number, |
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98 bool save_vars = true) |
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99 { |
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100 static bool been_there_done_that = false; |
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101 |
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102 if (been_there_done_that) |
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103 { |
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104 #if defined (SIGABRT) |
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105 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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106 #endif |
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107 |
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108 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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109 abort (); |
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110 } |
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111 else |
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112 { |
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113 been_there_done_that = true; |
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114 |
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115 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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116 |
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4787
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117 if (save_vars) |
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118 save_user_variables (); |
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119 |
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3162
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120 if (sig_number < 0) |
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121 exit (1); |
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122 else |
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123 { |
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124 octave_set_signal_handler (sig_number, SIG_DFL); |
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125 |
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4092
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126 #if defined (HAVE_RAISE) |
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127 raise (sig_number); |
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128 #elif defined (HAVE_KILL) |
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129 kill (getpid (), sig_number); |
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4092
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130 #else |
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131 exit (1); |
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132 #endif |
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3162
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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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138 sig_handler * |
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139 octave_set_signal_handler (int sig, sig_handler *handler) |
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140 { |
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141 #if defined (HAVE_POSIX_SIGNALS) |
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142 struct sigaction act, oact; |
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143 act.sa_handler = handler; |
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144 act.sa_flags = 0; |
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145 sigemptyset (&act.sa_mask); |
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146 sigemptyset (&oact.sa_mask); |
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147 sigaction (sig, &act, &oact); |
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148 return oact.sa_handler; |
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149 #else |
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150 return signal (sig, handler); |
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151 #endif |
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152 } |
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153 |
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154 static RETSIGTYPE |
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1446
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155 generic_sig_handler (int sig) |
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156 { |
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1446
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157 my_friendly_exit (sys_siglist[sig], sig); |
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158 |
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2469
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159 SIGHANDLER_RETURN (0); |
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160 } |
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161 |
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162 // Handle SIGCHLD. |
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163 |
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164 #ifdef SIGCHLD |
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165 static RETSIGTYPE |
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166 sigchld_handler (int /* sig */) |
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167 { |
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168 volatile octave_interrupt_handler saved_interrupt_handler |
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169 = octave_ignore_interrupts (); |
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170 |
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171 // I wonder if this is really right, or if SIGCHLD should just be |
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172 // blocked on OS/2 systems the same as for systems with POSIX signal |
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173 // functions. |
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174 |
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175 #if defined (__EMX__) |
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176 volatile sig_handler *saved_sigchld_handler |
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177 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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178 #endif |
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179 |
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2626
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180 sigset_t set, oset; |
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181 |
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182 BLOCK_CHILD (set, oset); |
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183 |
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2209
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184 int n = octave_child_list::length (); |
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185 |
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3252
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186 for (int i = 0; i < n; i++) |
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187 { |
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188 octave_child& elt = octave_child_list::elem (i); |
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189 |
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190 pid_t pid = elt.pid; |
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191 |
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3252
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192 if (pid > 0) |
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193 { |
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194 int status; |
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195 |
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196 if (waitpid (pid, &status, WNOHANG) > 0) |
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197 { |
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198 elt.pid = -1; |
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199 |
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200 octave_child::dead_child_handler f = elt.handler; |
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201 |
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3252
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202 if (f) |
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203 f (pid, status); |
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204 |
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205 break; |
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206 } |
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207 } |
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208 } |
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209 |
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210 octave_set_interrupt_handler (saved_interrupt_handler); |
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211 |
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212 UNBLOCK_CHILD (oset); |
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213 |
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214 #ifdef __EMX__ |
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215 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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216 #endif |
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217 |
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218 MAYBE_ACK_SIGNAL (SIGCHLD); |
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219 |
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220 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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221 |
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222 SIGHANDLER_RETURN (0); |
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223 } |
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224 #endif /* defined(SIGCHLD) */ |
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225 |
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226 #ifdef SIGFPE |
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227 #if defined (__alpha__) |
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228 static RETSIGTYPE |
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229 sigfpe_handler (int /* sig */) |
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230 { |
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231 MAYBE_ACK_SIGNAL (SIGFPE); |
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232 |
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233 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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234 |
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3531
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235 std::cerr << "error: floating point exception -- trying to return to prompt\n"; |
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236 |
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4182
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237 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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238 // here? |
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239 |
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1373
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240 if (can_interrupt) |
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241 octave_interrupt_state++; |
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242 |
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2469
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243 SIGHANDLER_RETURN (0); |
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1373
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244 } |
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4064
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245 #endif /* defined(__alpha__) */ |
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246 #endif /* defined(SIGFPE) */ |
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247 |
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248 #if defined (SIGHUP) || defined (SIGTERM) |
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249 static RETSIGTYPE |
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250 sig_hup_or_term_handler (int sig) |
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251 { |
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252 MAYBE_ACK_SIGNAL (sig); |
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253 |
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254 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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255 |
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256 switch (sig) |
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257 { |
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258 #if defined (SIGHUP) |
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259 case SIGHUP: |
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260 { |
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261 if (Vsighup_dumps_octave_core) |
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262 save_user_variables (); |
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263 } |
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264 break; |
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265 #endif |
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266 |
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267 #if defined (SIGTERM) |
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268 case SIGTERM: |
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269 { |
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270 if (Vsigterm_dumps_octave_core) |
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271 save_user_variables (); |
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272 } |
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273 break; |
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274 #endif |
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275 |
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276 default: |
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277 break; |
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278 } |
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279 |
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280 clean_up_and_exit (0); |
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281 |
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282 SIGHANDLER_RETURN (0); |
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283 } |
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284 #endif |
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285 |
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3343
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286 #if 0 |
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3281
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287 #if defined (SIGWINCH) |
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288 static RETSIGTYPE |
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289 sigwinch_handler (int /* sig */) |
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290 { |
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291 MAYBE_ACK_SIGNAL (SIGWINCH); |
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292 |
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293 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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294 |
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295 command_editor::resize_terminal (); |
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296 |
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297 SIGHANDLER_RETURN (0); |
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298 } |
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299 #endif |
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3343
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300 #endif |
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3281
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301 |
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635
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302 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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303 // |
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304 // This also has to work for SIGBREAK (on systems that have it), so we |
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305 // use the value of sig, instead of just assuming that it is called |
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306 // for SIGINT only. |
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635
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307 |
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1
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308 static RETSIGTYPE |
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2554
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309 sigint_handler (int sig) |
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1
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310 { |
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2626
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311 MAYBE_ACK_SIGNAL (sig); |
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2554
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312 |
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313 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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314 |
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4172
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315 if (! octave_initialized) |
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316 exit (1); |
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317 |
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1
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318 if (can_interrupt) |
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319 { |
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4185
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320 if (Vdebug_on_interrupt) |
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321 { |
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322 if (! octave_debug_on_interrupt_state) |
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323 { |
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324 octave_debug_on_interrupt_state = true; |
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325 |
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326 SIGHANDLER_RETURN (0); |
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327 } |
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328 else |
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329 // Clear the flag and do normal interrupt stuff. |
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330 octave_debug_on_interrupt_state = false; |
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331 } |
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332 |
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4153
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333 if (octave_interrupt_immediately) |
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334 octave_jump_to_enclosing_context (); |
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4429
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335 else |
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4787
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336 { |
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337 octave_interrupt_state++; |
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338 |
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339 if (interactive) |
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340 { |
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341 if (octave_interrupt_state > 3) |
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342 { |
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343 // XXX FIXME XXX -- might want to attempt to flush |
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344 // any pending input first... |
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345 |
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346 std::cerr << "abort [y/N]? "; |
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347 |
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348 int c = octave_kbhit (); |
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349 |
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350 std::cerr << static_cast<char> (c) << std::endl; |
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351 |
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352 if (c == 'y' || c == 'Y') |
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353 { |
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354 std::cerr << "save top-level workspace [y/N]? "; |
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355 |
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356 c = octave_kbhit (); |
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357 |
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358 std::cerr << static_cast<char> (c) << std::endl; |
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359 |
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360 my_friendly_exit (sys_siglist[sig], sig, |
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361 (c == 'y' || c == 'Y')); |
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362 } |
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363 else |
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364 { |
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365 // We will still eventually interrupt and jump to |
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366 // the top level even if no additional interrupts |
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367 // happen, but we will have to wait until it is |
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368 // safe to do so. It will take 3 more |
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369 // consecutive interrupts before we offer to |
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370 // abort again. |
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371 |
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372 octave_interrupt_state = 1; |
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373 } |
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374 } |
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375 } |
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376 } |
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1
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377 } |
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378 |
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2469
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379 SIGHANDLER_RETURN (0); |
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1
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380 } |
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381 |
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4064
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382 #ifdef SIGPIPE |
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1
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383 static RETSIGTYPE |
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1488
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384 sigpipe_handler (int /* sig */) |
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1
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385 { |
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2626
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386 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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387 |
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388 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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389 |
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1
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390 if (pipe_handler_error_count++ == 0) |
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3531
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391 std::cerr << "warning: broken pipe\n"; |
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1
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392 |
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1358
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393 // Don't loop forever on account of this. |
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394 |
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4182
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395 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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396 // here? |
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397 |
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1
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398 if (pipe_handler_error_count > 100) |
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4787
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399 octave_interrupt_state++; |
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1
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400 |
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2469
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401 SIGHANDLER_RETURN (0); |
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1
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402 } |
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4064
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403 #endif /* defined(SIGPIPE) */ |
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1
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404 |
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2705
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405 octave_interrupt_handler |
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2554
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406 octave_catch_interrupts (void) |
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407 { |
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2705
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408 octave_interrupt_handler retval; |
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2554
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409 |
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410 #ifdef SIGINT |
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2705
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411 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
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2554
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412 #endif |
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413 |
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414 #ifdef SIGBREAK |
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2705
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415 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
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2554
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416 #endif |
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2705
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417 |
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418 return retval; |
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2554
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419 } |
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420 |
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2705
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421 octave_interrupt_handler |
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422 octave_ignore_interrupts (void) |
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2554
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423 { |
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2705
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424 octave_interrupt_handler retval; |
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425 |
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2554
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426 #ifdef SIGINT |
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2705
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427 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
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2554
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428 #endif |
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429 |
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430 #ifdef SIGBREAK |
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2705
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431 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
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2554
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432 #endif |
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2705
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433 |
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434 return retval; |
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435 } |
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436 |
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437 octave_interrupt_handler |
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438 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h) |
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439 { |
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440 octave_interrupt_handler retval; |
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441 |
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442 #ifdef SIGINT |
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443 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler); |
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444 #endif |
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445 |
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446 #ifdef SIGBREAK |
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447 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler); |
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448 #endif |
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449 |
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450 return retval; |
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1651
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451 } |
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452 |
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635
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453 // Install all the handlers for the signals we might care about. |
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454 |
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1
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455 void |
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456 install_signal_handlers (void) |
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457 { |
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2554
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458 octave_catch_interrupts (); |
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459 |
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1
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460 #ifdef SIGABRT |
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1446
|
461 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
|
1
|
462 #endif |
|
|
463 |
|
|
464 #ifdef SIGALRM |
|
1446
|
465 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
|
1
|
466 #endif |
|
|
467 |
|
|
468 #ifdef SIGBUS |
|
1446
|
469 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
|
1
|
470 #endif |
|
|
471 |
|
1230
|
472 #ifdef SIGCHLD |
|
1446
|
473 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
|
1230
|
474 #endif |
|
|
475 |
|
3174
|
476 // SIGCLD |
|
|
477 // SIGCONT |
|
|
478 |
|
1
|
479 #ifdef SIGEMT |
|
1446
|
480 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
|
1
|
481 #endif |
|
|
482 |
|
|
483 #ifdef SIGFPE |
|
1373
|
484 #if defined (__alpha__) |
|
1446
|
485 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
|
1373
|
486 #else |
|
1446
|
487 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
|
1
|
488 #endif |
|
1373
|
489 #endif |
|
1
|
490 |
|
|
491 #ifdef SIGHUP |
|
4449
|
492 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
|
1
|
493 #endif |
|
|
494 |
|
|
495 #ifdef SIGILL |
|
1446
|
496 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
497 #endif |
|
|
498 |
|
3174
|
499 // SIGINFO |
|
|
500 // SIGINT |
|
|
501 |
|
1
|
502 #ifdef SIGIOT |
|
1446
|
503 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
504 #endif |
|
|
505 |
|
|
506 #ifdef SIGLOST |
|
1446
|
507 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
508 #endif |
|
|
509 |
|
|
510 #ifdef SIGPIPE |
|
1446
|
511 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
512 #endif |
|
|
513 |
|
|
514 #ifdef SIGPOLL |
|
1446
|
515 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
516 #endif |
|
|
517 |
|
|
518 #ifdef SIGPROF |
|
1446
|
519 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
520 #endif |
|
|
521 |
|
3174
|
522 // SIGPWR |
|
|
523 |
|
1
|
524 #ifdef SIGQUIT |
|
1446
|
525 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
526 #endif |
|
|
527 |
|
|
528 #ifdef SIGSEGV |
|
1446
|
529 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
530 #endif |
|
|
531 |
|
3174
|
532 // SIGSTOP |
|
|
533 |
|
1
|
534 #ifdef SIGSYS |
|
1446
|
535 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
536 #endif |
|
|
537 |
|
|
538 #ifdef SIGTERM |
|
4449
|
539 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
540 #endif |
|
|
541 |
|
|
542 #ifdef SIGTRAP |
|
1446
|
543 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
544 #endif |
|
|
545 |
|
3174
|
546 // SIGTSTP |
|
|
547 // SIGTTIN |
|
|
548 // SIGTTOU |
|
|
549 // SIGURG |
|
|
550 |
|
1
|
551 #ifdef SIGUSR1 |
|
1446
|
552 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
553 #endif |
|
|
554 |
|
|
555 #ifdef SIGUSR2 |
|
1446
|
556 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
557 #endif |
|
|
558 |
|
|
559 #ifdef SIGVTALRM |
|
1446
|
560 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
561 #endif |
|
|
562 |
|
895
|
563 #ifdef SIGIO |
|
1446
|
564 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
565 #endif |
|
|
566 |
|
3343
|
567 #if 0 |
|
3281
|
568 #ifdef SIGWINCH |
|
|
569 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
570 #endif |
|
3343
|
571 #endif |
|
3174
|
572 |
|
1
|
573 #ifdef SIGXCPU |
|
1446
|
574 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
575 #endif |
|
|
576 |
|
|
577 #ifdef SIGXFSZ |
|
1446
|
578 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
579 #endif |
|
|
580 } |
|
|
581 |
|
4294
|
582 static Octave_map |
|
|
583 make_sig_struct (void) |
|
|
584 { |
|
|
585 Octave_map m; |
|
|
586 |
|
|
587 #ifdef SIGABRT |
|
4675
|
588 m.assign ("ABRT", SIGABRT); |
|
4294
|
589 #endif |
|
|
590 |
|
|
591 #ifdef SIGALRM |
|
4675
|
592 m.assign ("ALRM", SIGALRM); |
|
4294
|
593 #endif |
|
|
594 |
|
|
595 #ifdef SIGBUS |
|
4675
|
596 m.assign ("BUS", SIGBUS); |
|
4294
|
597 #endif |
|
|
598 |
|
|
599 #ifdef SIGCHLD |
|
4675
|
600 m.assign ("CHLD", SIGCHLD); |
|
4294
|
601 #endif |
|
|
602 |
|
|
603 #ifdef SIGCLD |
|
4675
|
604 m.assign ("CLD", SIGCLD); |
|
4294
|
605 #endif |
|
|
606 |
|
|
607 #ifdef SIGCONT |
|
4675
|
608 m.assign ("CONT", SIGCONT); |
|
4294
|
609 #endif |
|
|
610 |
|
|
611 #ifdef SIGEMT |
|
4675
|
612 m.assign ("EMT", SIGEMT); |
|
4294
|
613 #endif |
|
|
614 |
|
|
615 #ifdef SIGFPE |
|
4675
|
616 m.assign ("FPE", SIGFPE); |
|
4294
|
617 #endif |
|
|
618 |
|
|
619 #ifdef SIGHUP |
|
4675
|
620 m.assign ("HUP", SIGHUP); |
|
4294
|
621 #endif |
|
|
622 |
|
|
623 #ifdef SIGILL |
|
4675
|
624 m.assign ("ILL", SIGILL); |
|
4294
|
625 #endif |
|
|
626 |
|
|
627 #ifdef SIGINFO |
|
4675
|
628 m.assign ("INFO", SIGINFO); |
|
4294
|
629 #endif |
|
|
630 |
|
|
631 #ifdef SIGINT |
|
4675
|
632 m.assign ("INT", SIGINT); |
|
4294
|
633 #endif |
|
|
634 |
|
|
635 #ifdef SIGIOT |
|
4675
|
636 m.assign ("IOT", SIGIOT); |
|
4294
|
637 #endif |
|
|
638 |
|
|
639 #ifdef SIGLOST |
|
4675
|
640 m.assign ("LOST", SIGLOST); |
|
4294
|
641 #endif |
|
|
642 |
|
|
643 #ifdef SIGPIPE |
|
4675
|
644 m.assign ("PIPE", SIGPIPE); |
|
4294
|
645 #endif |
|
|
646 |
|
|
647 #ifdef SIGPOLL |
|
4675
|
648 m.assign ("POLL", SIGPOLL); |
|
4294
|
649 #endif |
|
|
650 |
|
|
651 #ifdef SIGPROF |
|
4675
|
652 m.assign ("PROF", SIGPROF); |
|
4294
|
653 #endif |
|
|
654 |
|
|
655 #ifdef SIGPWR |
|
4675
|
656 m.assign ("PWR", SIGPWR); |
|
4294
|
657 #endif |
|
|
658 |
|
|
659 #ifdef SIGQUIT |
|
4675
|
660 m.assign ("QUIT", SIGQUIT); |
|
4294
|
661 #endif |
|
|
662 |
|
|
663 #ifdef SIGSEGV |
|
4675
|
664 m.assign ("SEGV", SIGSEGV); |
|
4294
|
665 #endif |
|
|
666 |
|
|
667 #ifdef SIGSTOP |
|
4675
|
668 m.assign ("STOP", SIGSTOP); |
|
4294
|
669 #endif |
|
|
670 |
|
|
671 #ifdef SIGSYS |
|
4675
|
672 m.assign ("SYS", SIGSYS); |
|
4294
|
673 #endif |
|
|
674 |
|
|
675 #ifdef SIGTERM |
|
4675
|
676 m.assign ("TERM", SIGTERM); |
|
4294
|
677 #endif |
|
|
678 |
|
|
679 #ifdef SIGTRAP |
|
4675
|
680 m.assign ("TRAP", SIGTRAP); |
|
4294
|
681 #endif |
|
|
682 |
|
|
683 #ifdef SIGTSTP |
|
4675
|
684 m.assign ("TSTP", SIGTSTP); |
|
4294
|
685 #endif |
|
|
686 |
|
|
687 #ifdef SIGTTIN |
|
4675
|
688 m.assign ("TTIN", SIGTTIN); |
|
4294
|
689 #endif |
|
|
690 |
|
|
691 #ifdef SIGTTOU |
|
4675
|
692 m.assign ("TTOU", SIGTTOU); |
|
4294
|
693 #endif |
|
|
694 |
|
|
695 #ifdef SIGURG |
|
4675
|
696 m.assign ("URG", SIGURG); |
|
4294
|
697 #endif |
|
|
698 |
|
|
699 #ifdef SIGUSR1 |
|
4675
|
700 m.assign ("USR1", SIGUSR1); |
|
4294
|
701 #endif |
|
|
702 |
|
|
703 #ifdef SIGUSR2 |
|
4675
|
704 m.assign ("USR2", SIGUSR2); |
|
4294
|
705 #endif |
|
|
706 |
|
|
707 #ifdef SIGVTALRM |
|
4675
|
708 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
709 #endif |
|
|
710 |
|
|
711 #ifdef SIGIO |
|
4675
|
712 m.assign ("IO", SIGIO); |
|
4294
|
713 #endif |
|
|
714 |
|
|
715 #ifdef SIGWINCH |
|
4675
|
716 m.assign ("WINCH", SIGWINCH); |
|
4294
|
717 #endif |
|
|
718 |
|
|
719 #ifdef SIGXCPU |
|
4675
|
720 m.assign ("XCPU", SIGXCPU); |
|
4294
|
721 #endif |
|
|
722 |
|
|
723 #ifdef SIGXFSZ |
|
4675
|
724 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
725 #endif |
|
|
726 |
|
|
727 return m; |
|
|
728 } |
|
|
729 |
|
2209
|
730 octave_child_list *octave_child_list::instance = 0; |
|
|
731 |
|
2926
|
732 bool |
|
|
733 octave_child_list::instance_ok (void) |
|
|
734 { |
|
|
735 bool retval = true; |
|
|
736 |
|
|
737 if (! instance) |
|
|
738 instance = new octave_child_list (); |
|
|
739 |
|
|
740 if (! instance) |
|
|
741 { |
|
|
742 ::error ("unable to create child list object!"); |
|
|
743 |
|
|
744 retval = false; |
|
|
745 } |
|
|
746 |
|
|
747 return retval; |
|
|
748 } |
|
|
749 |
|
|
750 void |
|
|
751 octave_child_list::insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
752 { |
|
|
753 if (instance_ok ()) |
|
|
754 instance->do_insert (pid, f); |
|
|
755 } |
|
|
756 |
|
|
757 void |
|
|
758 octave_child_list::remove (pid_t pid) |
|
|
759 { |
|
|
760 if (instance_ok ()) |
|
|
761 instance->do_remove (pid); |
|
|
762 } |
|
|
763 |
|
|
764 int |
|
|
765 octave_child_list::length (void) |
|
|
766 { |
|
|
767 return (instance_ok ()) ? instance->do_length () : 0; |
|
|
768 } |
|
|
769 |
|
|
770 octave_child& |
|
|
771 octave_child_list::elem (int i) |
|
|
772 { |
|
|
773 static octave_child foo; |
|
|
774 |
|
|
775 return (instance_ok ()) ? instance->do_elem (i) : foo; |
|
|
776 } |
|
|
777 |
|
2209
|
778 void |
|
|
779 octave_child_list::do_insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
780 { |
|
|
781 // Insert item in first open slot, increasing size of list if |
|
|
782 // necessary. |
|
|
783 |
|
|
784 bool enlarge = true; |
|
|
785 |
|
|
786 for (int i = 0; i < curr_len; i++) |
|
|
787 { |
|
2305
|
788 octave_child& tmp = list (i); |
|
2209
|
789 |
|
|
790 if (tmp.pid < 0) |
|
|
791 { |
|
2305
|
792 list (i) = octave_child (pid, f); |
|
2209
|
793 enlarge = false; |
|
|
794 break; |
|
|
795 } |
|
|
796 } |
|
|
797 |
|
|
798 if (enlarge) |
|
|
799 { |
|
|
800 int total_len = list.length (); |
|
|
801 |
|
|
802 if (curr_len == total_len) |
|
|
803 { |
|
|
804 if (total_len == 0) |
|
|
805 list.resize (16); |
|
|
806 else |
|
|
807 list.resize (total_len * 2); |
|
|
808 } |
|
|
809 |
|
2305
|
810 list (curr_len) = octave_child (pid, f); |
|
2209
|
811 curr_len++; |
|
|
812 } |
|
|
813 } |
|
|
814 |
|
|
815 void |
|
2210
|
816 octave_child_list::do_remove (pid_t pid) |
|
|
817 { |
|
|
818 // Mark the record for PID invalid. |
|
|
819 |
|
|
820 for (int i = 0; i < curr_len; i++) |
|
|
821 { |
|
2305
|
822 octave_child& tmp = list (i); |
|
2210
|
823 |
|
|
824 if (tmp.pid == pid) |
|
|
825 { |
|
|
826 tmp.pid = -1; |
|
|
827 break; |
|
|
828 } |
|
|
829 } |
|
|
830 } |
|
|
831 |
|
2926
|
832 int |
|
|
833 octave_child_list::do_length (void) const |
|
|
834 { |
|
|
835 return curr_len; |
|
|
836 } |
|
|
837 |
|
|
838 octave_child& |
|
|
839 octave_child_list::do_elem (int i) |
|
2210
|
840 { |
|
2926
|
841 static octave_child foo; |
|
|
842 |
|
|
843 int n = do_length (); |
|
2210
|
844 |
|
2926
|
845 if (i >= 0 && i < n) |
|
|
846 return list (i); |
|
2210
|
847 else |
|
2926
|
848 return foo; |
|
2210
|
849 } |
|
|
850 |
|
4185
|
851 static int |
|
|
852 debug_on_interrupt (void) |
|
|
853 { |
|
|
854 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
855 |
|
|
856 return 0; |
|
|
857 } |
|
|
858 |
|
4449
|
859 static int |
|
|
860 sighup_dumps_octave_core (void) |
|
|
861 { |
|
|
862 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
863 |
|
|
864 return 0; |
|
|
865 } |
|
|
866 |
|
|
867 static int |
|
|
868 sigterm_dumps_octave_core (void) |
|
|
869 { |
|
|
870 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
871 |
|
|
872 return 0; |
|
|
873 } |
|
|
874 |
|
4185
|
875 void |
|
|
876 symbols_of_sighandlers (void) |
|
|
877 { |
|
4233
|
878 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
879 "-*- texinfo -*-\n\ |
|
|
880 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
881 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
882 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
883 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
884 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
885 The default value is 0.\n\ |
|
|
886 @end defvr"); |
|
4294
|
887 |
|
4449
|
888 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
889 "-*- texinfo -*-\n\ |
|
|
890 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
891 If this variable is set to a nonzero value and\n\ |
|
|
892 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
893 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
894 hangup signal. The default value is 1.\n\ |
|
|
895 @end defvr"); |
|
|
896 |
|
|
897 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
898 "-*- texinfo -*-\n\ |
|
|
899 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
900 If this variable is set to a nonzero value and\n\ |
|
|
901 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
902 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
903 terminate signal. The default value is 1.\n\ |
|
|
904 @end defvr"); |
|
|
905 |
|
4294
|
906 DEFCONST (SIG, make_sig_struct (), |
|
|
907 "-*- texinfo -*-\n\ |
|
|
908 @defvr {Built-in Variable} SIG\n\ |
|
|
909 Structure of Unix signal names and their defined values.\n\ |
|
|
910 @end defvr"); |
|
4185
|
911 } |
|
|
912 |
|
1
|
913 /* |
|
|
914 ;;; Local Variables: *** |
|
|
915 ;;; mode: C++ *** |
|
|
916 ;;; End: *** |
|
|
917 */ |
