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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1230
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24 #include <config.h> |
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1
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25 #endif |
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26 |
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2536
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27 #include <cstdlib> |
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28 |
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3503
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29 #include <iostream> |
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1344
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30 #include <new> |
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31 |
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1350
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32 #ifdef HAVE_UNISTD_H |
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2442
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33 #ifdef HAVE_SYS_TYPES_H |
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834
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34 #include <sys/types.h> |
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2442
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35 #endif |
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834
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36 #include <unistd.h> |
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37 #endif |
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1343
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38 |
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3281
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39 #include "cmd-edit.h" |
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4153
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40 #include "quit.h" |
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3281
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41 |
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4185
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42 #include "defun.h" |
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1352
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43 #include "error.h" |
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1373
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44 #include "load-save.h" |
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4294
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45 #include "oct-map.h" |
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2091
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46 #include "pager.h" |
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4185
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47 #include "pt-bp.h" |
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1
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48 #include "sighandlers.h" |
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1352
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49 #include "syswait.h" |
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2091
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50 #include "toplev.h" |
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1
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51 #include "utils.h" |
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52 |
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53 // Nonzero means we have already printed a message for this series of |
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54 // SIGPIPES. We assume that the writer will eventually give up. |
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55 int pipe_handler_error_count = 0; |
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56 |
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3018
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57 // TRUE means we can be interrupted. |
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58 bool can_interrupt = false; |
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1
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59 |
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4185
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60 // TRUE means we should try to enter the debugger on SIGINT. |
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61 static bool Vdebug_on_interrupt = false; |
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62 |
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4449
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63 // Allow users to avoid writing octave-core for SIGHUP (sent by |
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64 // closing gnome-terminal, for example). Note that this variable has |
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65 // no effect if Vcrash_dumps_octave_core is FALSE. |
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66 static bool Vsighup_dumps_octave_core; |
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67 |
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68 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. |
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69 static bool Vsigterm_dumps_octave_core; |
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70 |
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2469
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71 #if RETSIGTYPE == void |
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72 #define SIGHANDLER_RETURN(status) return |
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73 #else |
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74 #define SIGHANDLER_RETURN(status) return status |
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75 #endif |
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76 |
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2554
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77 #if defined (MUST_REINSTALL_SIGHANDLERS) |
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78 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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79 octave_set_signal_handler (sig, handler) |
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2931
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80 #define REINSTALL_USES_SIG 1 |
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2554
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81 #else |
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82 #define MAYBE_REINSTALL_SIGHANDLER(sig, handler) \ |
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83 do { } while (0) |
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84 #endif |
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85 |
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86 #if defined (__EMX__) |
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2626
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87 #define MAYBE_ACK_SIGNAL(sig) \ |
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88 octave_set_signal_handler (sig, SIG_ACK) |
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2931
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89 #define ACK_USES_SIG 1 |
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2554
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90 #else |
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91 #define MAYBE_ACK_SIGNAL(sig) \ |
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92 do { } while (0) |
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93 #endif |
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94 |
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95 static void |
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96 my_friendly_exit (const char *sig_name, int sig_number) |
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97 { |
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2536
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98 static bool been_there_done_that = false; |
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99 |
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100 if (been_there_done_that) |
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101 { |
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102 #if defined (SIGABRT) |
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103 octave_set_signal_handler (SIGABRT, SIG_DFL); |
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104 #endif |
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105 |
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3644
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106 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
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107 abort (); |
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108 } |
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109 else |
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110 { |
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111 been_there_done_that = true; |
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112 |
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3644
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113 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
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114 |
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115 save_user_variables (); |
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116 |
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3162
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117 if (sig_number < 0) |
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118 exit (1); |
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119 else |
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120 { |
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121 octave_set_signal_handler (sig_number, SIG_DFL); |
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122 |
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4092
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123 #if defined (HAVE_RAISE) |
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124 raise (sig_number); |
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125 #elif defined (HAVE_KILL) |
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3162
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126 kill (getpid (), sig_number); |
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4092
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127 #else |
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128 exit (1); |
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129 #endif |
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3162
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130 } |
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131 |
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132 } |
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133 } |
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134 |
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1446
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135 sig_handler * |
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136 octave_set_signal_handler (int sig, sig_handler *handler) |
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137 { |
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138 #if defined (HAVE_POSIX_SIGNALS) |
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139 struct sigaction act, oact; |
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140 act.sa_handler = handler; |
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141 act.sa_flags = 0; |
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142 sigemptyset (&act.sa_mask); |
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143 sigemptyset (&oact.sa_mask); |
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144 sigaction (sig, &act, &oact); |
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145 return oact.sa_handler; |
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146 #else |
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147 return signal (sig, handler); |
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148 #endif |
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149 } |
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150 |
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151 static RETSIGTYPE |
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152 generic_sig_handler (int sig) |
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1
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153 { |
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154 my_friendly_exit (sys_siglist[sig], sig); |
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155 |
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2469
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156 SIGHANDLER_RETURN (0); |
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157 } |
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158 |
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2091
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159 // Handle SIGCHLD. |
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160 |
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4064
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161 #ifdef SIGCHLD |
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1230
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162 static RETSIGTYPE |
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2092
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163 sigchld_handler (int /* sig */) |
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164 { |
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2705
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165 volatile octave_interrupt_handler saved_interrupt_handler |
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166 = octave_ignore_interrupts (); |
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167 |
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168 // I wonder if this is really right, or if SIGCHLD should just be |
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169 // blocked on OS/2 systems the same as for systems with POSIX signal |
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170 // functions. |
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171 |
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172 #if defined (__EMX__) |
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173 volatile sig_handler *saved_sigchld_handler |
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174 = octave_set_signal_handler (SIGCHLD, SIG_IGN); |
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175 #endif |
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176 |
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2626
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177 sigset_t set, oset; |
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178 |
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179 BLOCK_CHILD (set, oset); |
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180 |
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2209
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181 int n = octave_child_list::length (); |
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182 |
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3252
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183 for (int i = 0; i < n; i++) |
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2554
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184 { |
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3252
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185 octave_child& elt = octave_child_list::elem (i); |
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186 |
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187 pid_t pid = elt.pid; |
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2209
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188 |
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3252
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189 if (pid > 0) |
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190 { |
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191 int status; |
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192 |
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3252
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193 if (waitpid (pid, &status, WNOHANG) > 0) |
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194 { |
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3252
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195 elt.pid = -1; |
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196 |
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3252
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197 octave_child::dead_child_handler f = elt.handler; |
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2197
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198 |
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3252
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199 if (f) |
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200 f (pid, status); |
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2197
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201 |
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3252
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202 break; |
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2091
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203 } |
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1230
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204 } |
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205 } |
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206 |
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2600
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207 octave_set_interrupt_handler (saved_interrupt_handler); |
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208 |
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2626
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209 UNBLOCK_CHILD (oset); |
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210 |
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211 #ifdef __EMX__ |
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212 octave_set_signal_handler (SIGCHLD, saved_sigchld_handler); |
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2475
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213 #endif |
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214 |
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215 MAYBE_ACK_SIGNAL (SIGCHLD); |
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216 |
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217 MAYBE_REINSTALL_SIGHANDLER (SIGCHLD, sigchld_handler); |
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218 |
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219 SIGHANDLER_RETURN (0); |
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220 } |
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221 #endif /* defined(SIGCHLD) */ |
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222 |
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4064
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223 #ifdef SIGFPE |
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224 #if defined (__alpha__) |
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225 static RETSIGTYPE |
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226 sigfpe_handler (int /* sig */) |
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227 { |
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228 MAYBE_ACK_SIGNAL (SIGFPE); |
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229 |
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230 MAYBE_REINSTALL_SIGHANDLER (SIGFPE, sigfpe_handler); |
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231 |
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3531
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232 std::cerr << "error: floating point exception -- trying to return to prompt\n"; |
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233 |
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4182
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234 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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235 // here? |
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236 |
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1373
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237 if (can_interrupt) |
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4182
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238 octave_interrupt_state = 1; |
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239 |
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2469
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240 SIGHANDLER_RETURN (0); |
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1373
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241 } |
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4064
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242 #endif /* defined(__alpha__) */ |
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243 #endif /* defined(SIGFPE) */ |
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244 |
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4449
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245 #if defined (SIGHUP) || defined (SIGTERM) |
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246 static RETSIGTYPE |
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247 sig_hup_or_term_handler (int sig) |
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248 { |
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249 MAYBE_ACK_SIGNAL (sig); |
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250 |
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251 MAYBE_REINSTALL_SIGHANDLER (sig, sig_hup_or_term_handler); |
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252 |
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253 switch (sig) |
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254 { |
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255 #if defined (SIGHUP) |
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256 case SIGHUP: |
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257 { |
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258 if (Vsighup_dumps_octave_core) |
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259 save_user_variables (); |
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260 } |
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261 break; |
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262 #endif |
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263 |
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264 #if defined (SIGTERM) |
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265 case SIGTERM: |
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266 { |
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267 if (Vsigterm_dumps_octave_core) |
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268 save_user_variables (); |
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269 } |
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270 break; |
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271 #endif |
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272 |
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273 default: |
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274 break; |
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275 } |
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276 |
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277 clean_up_and_exit (0); |
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278 |
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279 SIGHANDLER_RETURN (0); |
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280 } |
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281 #endif |
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282 |
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3343
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283 #if 0 |
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3281
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284 #if defined (SIGWINCH) |
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285 static RETSIGTYPE |
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286 sigwinch_handler (int /* sig */) |
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287 { |
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288 MAYBE_ACK_SIGNAL (SIGWINCH); |
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289 |
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290 MAYBE_REINSTALL_SIGHANDLER (SIGWINCH, sigwinch_handler); |
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291 |
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292 command_editor::resize_terminal (); |
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293 |
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294 SIGHANDLER_RETURN (0); |
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295 } |
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296 #endif |
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3343
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297 #endif |
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3281
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298 |
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635
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299 // Handle SIGINT by restarting the parser (see octave.cc). |
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2554
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300 // |
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301 // This also has to work for SIGBREAK (on systems that have it), so we |
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302 // use the value of sig, instead of just assuming that it is called |
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303 // for SIGINT only. |
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635
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304 |
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1
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305 static RETSIGTYPE |
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2931
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306 #if defined (ACK_USES_SIG) || defined (REINSTALL_USES_SIG) |
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2554
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307 sigint_handler (int sig) |
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2931
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308 #else |
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309 sigint_handler (int) |
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310 #endif |
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1
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311 { |
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2626
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312 MAYBE_ACK_SIGNAL (sig); |
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2554
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313 |
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314 MAYBE_REINSTALL_SIGHANDLER (sig, sigint_handler); |
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834
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315 |
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4172
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316 if (! octave_initialized) |
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317 exit (1); |
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318 |
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1
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319 if (can_interrupt) |
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320 { |
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4185
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321 if (Vdebug_on_interrupt) |
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322 { |
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323 if (! octave_debug_on_interrupt_state) |
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324 { |
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325 octave_debug_on_interrupt_state = true; |
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326 |
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327 SIGHANDLER_RETURN (0); |
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328 } |
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329 else |
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330 // Clear the flag and do normal interrupt stuff. |
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331 octave_debug_on_interrupt_state = false; |
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332 } |
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333 |
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4153
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334 if (octave_interrupt_immediately) |
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335 octave_jump_to_enclosing_context (); |
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4429
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336 else |
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337 octave_interrupt_state = 1; |
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1
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338 } |
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339 |
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2469
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340 SIGHANDLER_RETURN (0); |
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1
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341 } |
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342 |
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4064
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343 #ifdef SIGPIPE |
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1
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344 static RETSIGTYPE |
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1488
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345 sigpipe_handler (int /* sig */) |
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1
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346 { |
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2626
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347 MAYBE_ACK_SIGNAL (SIGPIPE); |
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2554
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348 |
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349 MAYBE_REINSTALL_SIGHANDLER (SIGPIPE, sigpipe_handler); |
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834
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350 |
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1
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351 if (pipe_handler_error_count++ == 0) |
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3531
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352 std::cerr << "warning: broken pipe\n"; |
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1
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353 |
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1358
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354 // Don't loop forever on account of this. |
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355 |
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4182
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356 // XXX FIXME XXX -- will setting octave_interrupt_state really help |
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357 // here? |
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358 |
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1
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359 if (pipe_handler_error_count > 100) |
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4182
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360 octave_interrupt_state = 1; |
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1
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361 |
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2469
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362 SIGHANDLER_RETURN (0); |
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1
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363 } |
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4064
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364 #endif /* defined(SIGPIPE) */ |
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1
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365 |
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2705
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366 octave_interrupt_handler |
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2554
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367 octave_catch_interrupts (void) |
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368 { |
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2705
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369 octave_interrupt_handler retval; |
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2554
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370 |
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371 #ifdef SIGINT |
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2705
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372 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
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2554
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373 #endif |
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374 |
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375 #ifdef SIGBREAK |
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2705
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376 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
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2554
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377 #endif |
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2705
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378 |
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379 return retval; |
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2554
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380 } |
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381 |
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2705
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382 octave_interrupt_handler |
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383 octave_ignore_interrupts (void) |
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2554
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384 { |
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2705
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385 octave_interrupt_handler retval; |
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386 |
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2554
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387 #ifdef SIGINT |
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2705
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388 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
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2554
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389 #endif |
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390 |
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391 #ifdef SIGBREAK |
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2705
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392 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
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2554
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393 #endif |
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2705
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394 |
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395 return retval; |
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396 } |
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397 |
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398 octave_interrupt_handler |
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399 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h) |
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400 { |
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401 octave_interrupt_handler retval; |
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402 |
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403 #ifdef SIGINT |
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404 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler); |
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405 #endif |
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406 |
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407 #ifdef SIGBREAK |
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408 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler); |
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409 #endif |
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410 |
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411 return retval; |
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1651
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412 } |
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413 |
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635
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414 // Install all the handlers for the signals we might care about. |
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415 |
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1
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416 void |
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417 install_signal_handlers (void) |
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418 { |
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2554
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419 octave_catch_interrupts (); |
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420 |
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1
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421 #ifdef SIGABRT |
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1446
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422 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
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1
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423 #endif |
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424 |
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425 #ifdef SIGALRM |
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1446
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426 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
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1
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427 #endif |
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428 |
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429 #ifdef SIGBUS |
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1446
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430 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
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1
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431 #endif |
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432 |
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1230
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433 #ifdef SIGCHLD |
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1446
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434 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
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1230
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435 #endif |
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436 |
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3174
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437 // SIGCLD |
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438 // SIGCONT |
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439 |
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1
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440 #ifdef SIGEMT |
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1446
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441 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
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1
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442 #endif |
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443 |
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444 #ifdef SIGFPE |
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1373
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445 #if defined (__alpha__) |
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1446
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446 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
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1373
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447 #else |
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1446
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448 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
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1
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449 #endif |
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1373
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450 #endif |
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1
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451 |
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452 #ifdef SIGHUP |
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4449
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453 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
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1
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454 #endif |
|
|
455 |
|
|
456 #ifdef SIGILL |
|
1446
|
457 octave_set_signal_handler (SIGILL, generic_sig_handler); |
|
1
|
458 #endif |
|
|
459 |
|
3174
|
460 // SIGINFO |
|
|
461 // SIGINT |
|
|
462 |
|
1
|
463 #ifdef SIGIOT |
|
1446
|
464 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
|
1
|
465 #endif |
|
|
466 |
|
|
467 #ifdef SIGLOST |
|
1446
|
468 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
|
1
|
469 #endif |
|
|
470 |
|
|
471 #ifdef SIGPIPE |
|
1446
|
472 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
|
1
|
473 #endif |
|
|
474 |
|
|
475 #ifdef SIGPOLL |
|
1446
|
476 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
|
1
|
477 #endif |
|
|
478 |
|
|
479 #ifdef SIGPROF |
|
1446
|
480 octave_set_signal_handler (SIGPROF, generic_sig_handler); |
|
1
|
481 #endif |
|
|
482 |
|
3174
|
483 // SIGPWR |
|
|
484 |
|
1
|
485 #ifdef SIGQUIT |
|
1446
|
486 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
|
1
|
487 #endif |
|
|
488 |
|
|
489 #ifdef SIGSEGV |
|
1446
|
490 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
|
1
|
491 #endif |
|
|
492 |
|
3174
|
493 // SIGSTOP |
|
|
494 |
|
1
|
495 #ifdef SIGSYS |
|
1446
|
496 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
|
1
|
497 #endif |
|
|
498 |
|
|
499 #ifdef SIGTERM |
|
4449
|
500 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
|
1
|
501 #endif |
|
|
502 |
|
|
503 #ifdef SIGTRAP |
|
1446
|
504 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
|
1
|
505 #endif |
|
|
506 |
|
3174
|
507 // SIGTSTP |
|
|
508 // SIGTTIN |
|
|
509 // SIGTTOU |
|
|
510 // SIGURG |
|
|
511 |
|
1
|
512 #ifdef SIGUSR1 |
|
1446
|
513 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
|
1
|
514 #endif |
|
|
515 |
|
|
516 #ifdef SIGUSR2 |
|
1446
|
517 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
|
1
|
518 #endif |
|
|
519 |
|
|
520 #ifdef SIGVTALRM |
|
1446
|
521 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
|
1
|
522 #endif |
|
|
523 |
|
895
|
524 #ifdef SIGIO |
|
1446
|
525 octave_set_signal_handler (SIGIO, SIG_IGN); |
|
895
|
526 #endif |
|
|
527 |
|
3343
|
528 #if 0 |
|
3281
|
529 #ifdef SIGWINCH |
|
|
530 octave_set_signal_handler (SIGWINCH, sigwinch_handler); |
|
|
531 #endif |
|
3343
|
532 #endif |
|
3174
|
533 |
|
1
|
534 #ifdef SIGXCPU |
|
1446
|
535 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
|
1
|
536 #endif |
|
|
537 |
|
|
538 #ifdef SIGXFSZ |
|
1446
|
539 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
|
1
|
540 #endif |
|
|
541 } |
|
|
542 |
|
4294
|
543 static Octave_map |
|
|
544 make_sig_struct (void) |
|
|
545 { |
|
|
546 Octave_map m; |
|
|
547 |
|
|
548 #ifdef SIGABRT |
|
4675
|
549 m.assign ("ABRT", SIGABRT); |
|
4294
|
550 #endif |
|
|
551 |
|
|
552 #ifdef SIGALRM |
|
4675
|
553 m.assign ("ALRM", SIGALRM); |
|
4294
|
554 #endif |
|
|
555 |
|
|
556 #ifdef SIGBUS |
|
4675
|
557 m.assign ("BUS", SIGBUS); |
|
4294
|
558 #endif |
|
|
559 |
|
|
560 #ifdef SIGCHLD |
|
4675
|
561 m.assign ("CHLD", SIGCHLD); |
|
4294
|
562 #endif |
|
|
563 |
|
|
564 #ifdef SIGCLD |
|
4675
|
565 m.assign ("CLD", SIGCLD); |
|
4294
|
566 #endif |
|
|
567 |
|
|
568 #ifdef SIGCONT |
|
4675
|
569 m.assign ("CONT", SIGCONT); |
|
4294
|
570 #endif |
|
|
571 |
|
|
572 #ifdef SIGEMT |
|
4675
|
573 m.assign ("EMT", SIGEMT); |
|
4294
|
574 #endif |
|
|
575 |
|
|
576 #ifdef SIGFPE |
|
4675
|
577 m.assign ("FPE", SIGFPE); |
|
4294
|
578 #endif |
|
|
579 |
|
|
580 #ifdef SIGHUP |
|
4675
|
581 m.assign ("HUP", SIGHUP); |
|
4294
|
582 #endif |
|
|
583 |
|
|
584 #ifdef SIGILL |
|
4675
|
585 m.assign ("ILL", SIGILL); |
|
4294
|
586 #endif |
|
|
587 |
|
|
588 #ifdef SIGINFO |
|
4675
|
589 m.assign ("INFO", SIGINFO); |
|
4294
|
590 #endif |
|
|
591 |
|
|
592 #ifdef SIGINT |
|
4675
|
593 m.assign ("INT", SIGINT); |
|
4294
|
594 #endif |
|
|
595 |
|
|
596 #ifdef SIGIOT |
|
4675
|
597 m.assign ("IOT", SIGIOT); |
|
4294
|
598 #endif |
|
|
599 |
|
|
600 #ifdef SIGLOST |
|
4675
|
601 m.assign ("LOST", SIGLOST); |
|
4294
|
602 #endif |
|
|
603 |
|
|
604 #ifdef SIGPIPE |
|
4675
|
605 m.assign ("PIPE", SIGPIPE); |
|
4294
|
606 #endif |
|
|
607 |
|
|
608 #ifdef SIGPOLL |
|
4675
|
609 m.assign ("POLL", SIGPOLL); |
|
4294
|
610 #endif |
|
|
611 |
|
|
612 #ifdef SIGPROF |
|
4675
|
613 m.assign ("PROF", SIGPROF); |
|
4294
|
614 #endif |
|
|
615 |
|
|
616 #ifdef SIGPWR |
|
4675
|
617 m.assign ("PWR", SIGPWR); |
|
4294
|
618 #endif |
|
|
619 |
|
|
620 #ifdef SIGQUIT |
|
4675
|
621 m.assign ("QUIT", SIGQUIT); |
|
4294
|
622 #endif |
|
|
623 |
|
|
624 #ifdef SIGSEGV |
|
4675
|
625 m.assign ("SEGV", SIGSEGV); |
|
4294
|
626 #endif |
|
|
627 |
|
|
628 #ifdef SIGSTOP |
|
4675
|
629 m.assign ("STOP", SIGSTOP); |
|
4294
|
630 #endif |
|
|
631 |
|
|
632 #ifdef SIGSYS |
|
4675
|
633 m.assign ("SYS", SIGSYS); |
|
4294
|
634 #endif |
|
|
635 |
|
|
636 #ifdef SIGTERM |
|
4675
|
637 m.assign ("TERM", SIGTERM); |
|
4294
|
638 #endif |
|
|
639 |
|
|
640 #ifdef SIGTRAP |
|
4675
|
641 m.assign ("TRAP", SIGTRAP); |
|
4294
|
642 #endif |
|
|
643 |
|
|
644 #ifdef SIGTSTP |
|
4675
|
645 m.assign ("TSTP", SIGTSTP); |
|
4294
|
646 #endif |
|
|
647 |
|
|
648 #ifdef SIGTTIN |
|
4675
|
649 m.assign ("TTIN", SIGTTIN); |
|
4294
|
650 #endif |
|
|
651 |
|
|
652 #ifdef SIGTTOU |
|
4675
|
653 m.assign ("TTOU", SIGTTOU); |
|
4294
|
654 #endif |
|
|
655 |
|
|
656 #ifdef SIGURG |
|
4675
|
657 m.assign ("URG", SIGURG); |
|
4294
|
658 #endif |
|
|
659 |
|
|
660 #ifdef SIGUSR1 |
|
4675
|
661 m.assign ("USR1", SIGUSR1); |
|
4294
|
662 #endif |
|
|
663 |
|
|
664 #ifdef SIGUSR2 |
|
4675
|
665 m.assign ("USR2", SIGUSR2); |
|
4294
|
666 #endif |
|
|
667 |
|
|
668 #ifdef SIGVTALRM |
|
4675
|
669 m.assign ("VTALRM", SIGVTALRM); |
|
4294
|
670 #endif |
|
|
671 |
|
|
672 #ifdef SIGIO |
|
4675
|
673 m.assign ("IO", SIGIO); |
|
4294
|
674 #endif |
|
|
675 |
|
|
676 #ifdef SIGWINCH |
|
4675
|
677 m.assign ("WINCH", SIGWINCH); |
|
4294
|
678 #endif |
|
|
679 |
|
|
680 #ifdef SIGXCPU |
|
4675
|
681 m.assign ("XCPU", SIGXCPU); |
|
4294
|
682 #endif |
|
|
683 |
|
|
684 #ifdef SIGXFSZ |
|
4675
|
685 m.assign ("XFSZ", SIGXFSZ); |
|
4294
|
686 #endif |
|
|
687 |
|
|
688 return m; |
|
|
689 } |
|
|
690 |
|
2209
|
691 octave_child_list *octave_child_list::instance = 0; |
|
|
692 |
|
2926
|
693 bool |
|
|
694 octave_child_list::instance_ok (void) |
|
|
695 { |
|
|
696 bool retval = true; |
|
|
697 |
|
|
698 if (! instance) |
|
|
699 instance = new octave_child_list (); |
|
|
700 |
|
|
701 if (! instance) |
|
|
702 { |
|
|
703 ::error ("unable to create child list object!"); |
|
|
704 |
|
|
705 retval = false; |
|
|
706 } |
|
|
707 |
|
|
708 return retval; |
|
|
709 } |
|
|
710 |
|
|
711 void |
|
|
712 octave_child_list::insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
713 { |
|
|
714 if (instance_ok ()) |
|
|
715 instance->do_insert (pid, f); |
|
|
716 } |
|
|
717 |
|
|
718 void |
|
|
719 octave_child_list::remove (pid_t pid) |
|
|
720 { |
|
|
721 if (instance_ok ()) |
|
|
722 instance->do_remove (pid); |
|
|
723 } |
|
|
724 |
|
|
725 int |
|
|
726 octave_child_list::length (void) |
|
|
727 { |
|
|
728 return (instance_ok ()) ? instance->do_length () : 0; |
|
|
729 } |
|
|
730 |
|
|
731 octave_child& |
|
|
732 octave_child_list::elem (int i) |
|
|
733 { |
|
|
734 static octave_child foo; |
|
|
735 |
|
|
736 return (instance_ok ()) ? instance->do_elem (i) : foo; |
|
|
737 } |
|
|
738 |
|
2209
|
739 void |
|
|
740 octave_child_list::do_insert (pid_t pid, octave_child::dead_child_handler f) |
|
|
741 { |
|
|
742 // Insert item in first open slot, increasing size of list if |
|
|
743 // necessary. |
|
|
744 |
|
|
745 bool enlarge = true; |
|
|
746 |
|
|
747 for (int i = 0; i < curr_len; i++) |
|
|
748 { |
|
2305
|
749 octave_child& tmp = list (i); |
|
2209
|
750 |
|
|
751 if (tmp.pid < 0) |
|
|
752 { |
|
2305
|
753 list (i) = octave_child (pid, f); |
|
2209
|
754 enlarge = false; |
|
|
755 break; |
|
|
756 } |
|
|
757 } |
|
|
758 |
|
|
759 if (enlarge) |
|
|
760 { |
|
|
761 int total_len = list.length (); |
|
|
762 |
|
|
763 if (curr_len == total_len) |
|
|
764 { |
|
|
765 if (total_len == 0) |
|
|
766 list.resize (16); |
|
|
767 else |
|
|
768 list.resize (total_len * 2); |
|
|
769 } |
|
|
770 |
|
2305
|
771 list (curr_len) = octave_child (pid, f); |
|
2209
|
772 curr_len++; |
|
|
773 } |
|
|
774 } |
|
|
775 |
|
|
776 void |
|
2210
|
777 octave_child_list::do_remove (pid_t pid) |
|
|
778 { |
|
|
779 // Mark the record for PID invalid. |
|
|
780 |
|
|
781 for (int i = 0; i < curr_len; i++) |
|
|
782 { |
|
2305
|
783 octave_child& tmp = list (i); |
|
2210
|
784 |
|
|
785 if (tmp.pid == pid) |
|
|
786 { |
|
|
787 tmp.pid = -1; |
|
|
788 break; |
|
|
789 } |
|
|
790 } |
|
|
791 } |
|
|
792 |
|
2926
|
793 int |
|
|
794 octave_child_list::do_length (void) const |
|
|
795 { |
|
|
796 return curr_len; |
|
|
797 } |
|
|
798 |
|
|
799 octave_child& |
|
|
800 octave_child_list::do_elem (int i) |
|
2210
|
801 { |
|
2926
|
802 static octave_child foo; |
|
|
803 |
|
|
804 int n = do_length (); |
|
2210
|
805 |
|
2926
|
806 if (i >= 0 && i < n) |
|
|
807 return list (i); |
|
2210
|
808 else |
|
2926
|
809 return foo; |
|
2210
|
810 } |
|
|
811 |
|
4185
|
812 static int |
|
|
813 debug_on_interrupt (void) |
|
|
814 { |
|
|
815 Vdebug_on_interrupt = check_preference ("debug_on_interrupt"); |
|
|
816 |
|
|
817 return 0; |
|
|
818 } |
|
|
819 |
|
4449
|
820 static int |
|
|
821 sighup_dumps_octave_core (void) |
|
|
822 { |
|
|
823 Vsighup_dumps_octave_core = check_preference ("sighup_dumps_octave_core"); |
|
|
824 |
|
|
825 return 0; |
|
|
826 } |
|
|
827 |
|
|
828 static int |
|
|
829 sigterm_dumps_octave_core (void) |
|
|
830 { |
|
|
831 Vsigterm_dumps_octave_core = check_preference ("sigterm_dumps_octave_core"); |
|
|
832 |
|
|
833 return 0; |
|
|
834 } |
|
|
835 |
|
4185
|
836 void |
|
|
837 symbols_of_sighandlers (void) |
|
|
838 { |
|
4233
|
839 DEFVAR (debug_on_interrupt, false, debug_on_interrupt, |
|
4185
|
840 "-*- texinfo -*-\n\ |
|
|
841 @defvr {Built-in Variable} debug_on_interrupt\n\ |
|
|
842 If @code{debug_on_interrupt} is nonzero, Octave will try to enter\n\ |
|
|
843 debugging mode when it receives an interrupt signal (typically\n\ |
|
|
844 generated with @kbd{C-c}). If a second interrupt signal is received\n\ |
|
|
845 before reaching the debugging mode, a normal interrupt will occur.\n\ |
|
|
846 The default value is 0.\n\ |
|
|
847 @end defvr"); |
|
4294
|
848 |
|
4449
|
849 DEFVAR (sighup_dumps_octave_core, true, sighup_dumps_octave_core, |
|
|
850 "-*- texinfo -*-\n\ |
|
|
851 @defvr {Built-in Variable} sighup_dumps_octave_core\n\ |
|
|
852 If this variable is set to a nonzero value and\n\ |
|
|
853 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
854 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
855 hangup signal. The default value is 1.\n\ |
|
|
856 @end defvr"); |
|
|
857 |
|
|
858 DEFVAR (sigterm_dumps_octave_core, true, sigterm_dumps_octave_core, |
|
|
859 "-*- texinfo -*-\n\ |
|
|
860 @defvr {Built-in Variable} sigterm_dumps_octave_core\n\ |
|
|
861 If this variable is set to a nonzero value and\n\ |
|
|
862 @code{crash_dumps_octave_core} is also nonzero, Octave tries to save all\n\ |
|
|
863 current variables the the file \"octave-core\" if it receives a\n\ |
|
|
864 terminate signal. The default value is 1.\n\ |
|
|
865 @end defvr"); |
|
|
866 |
|
4294
|
867 DEFCONST (SIG, make_sig_struct (), |
|
|
868 "-*- texinfo -*-\n\ |
|
|
869 @defvr {Built-in Variable} SIG\n\ |
|
|
870 Structure of Unix signal names and their defined values.\n\ |
|
|
871 @end defvr"); |
|
4185
|
872 } |
|
|
873 |
|
1
|
874 /* |
|
|
875 ;;; Local Variables: *** |
|
|
876 ;;; mode: C++ *** |
|
|
877 ;;; End: *** |
|
|
878 */ |
