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1683
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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1683
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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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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cassert> |
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28 #include <csetjmp> |
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29 #include <csignal> |
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30 #include <cstdlib> |
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31 #include <cstring> |
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32 #include <ctime> |
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33 |
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1728
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34 #include <string> |
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35 |
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1683
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36 #include <fstream.h> |
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37 #include <iostream.h> |
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38 #include <strstream.h> |
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39 |
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40 #ifdef HAVE_UNISTD_H |
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2442
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41 #ifdef HAVE_SYS_TYPES_H |
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42 #include <sys/types.h> |
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2442
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43 #endif |
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44 #include <unistd.h> |
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45 #endif |
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46 |
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2926
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47 #include "cmd-edit.h" |
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48 #include "file-ops.h" |
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1683
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49 #include "lo-error.h" |
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2370
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50 #include "lo-mappers.h" |
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3020
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51 #include "oct-env.h" |
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1755
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52 #include "str-vec.h" |
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53 |
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2492
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54 #include <defaults.h> |
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55 #include "defun.h" |
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56 #include "dynamic-ld.h" |
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57 #include "error.h" |
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58 #include "file-io.h" |
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59 #include "input.h" |
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60 #include "lex.h" |
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2492
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61 #include <oct-conf.h> |
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1742
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62 #include "oct-hist.h" |
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2162
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63 #include "oct-map.h" |
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2862
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64 #include "oct-obj.h" |
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65 #include "pager.h" |
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66 #include "parse.h" |
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67 #include "pathsearch.h" |
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68 #include "procstream.h" |
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2370
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69 #include "ov.h" |
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2985
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70 #include "pt-jump.h" |
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1750
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71 #include "pt-plot.h" |
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2982
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72 #include "pt-stmt.h" |
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73 #include "sighandlers.h" |
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74 #include "sysdep.h" |
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2693
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75 #include "syswait.h" |
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1750
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76 #include "toplev.h" |
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77 #include "unwind-prot.h" |
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78 #include "utils.h" |
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79 #include "variables.h" |
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2492
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80 #include <version.h> |
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81 |
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3020
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82 // TRUE means we are exiting via the builtin exit or quit functions. |
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83 static bool quitting_gracefully = false; |
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84 |
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85 // Current command to execute. |
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86 tree_statement_list *global_command = 0; |
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87 |
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88 // Pointer to function that is currently being evaluated. |
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2891
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89 octave_user_function *curr_function = 0; |
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90 |
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1907
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91 // Top level context (?) |
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92 jmp_buf toplevel; |
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93 |
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94 int |
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95 main_loop (void) |
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96 { |
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97 // Allow the user to interrupt us without exiting. |
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98 |
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99 octave_save_signal_mask (); |
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100 |
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1907
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101 if (setjmp (toplevel) != 0) |
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102 { |
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103 raw_mode (0); |
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104 |
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105 cout << "\n"; |
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106 |
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107 octave_restore_signal_mask (); |
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1907
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108 } |
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109 |
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110 can_interrupt = true; |
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111 |
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2554
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112 octave_catch_interrupts (); |
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113 |
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114 // The big loop. |
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115 |
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116 int retval; |
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117 do |
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118 { |
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119 curr_sym_tab = top_level_sym_tab; |
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120 |
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121 reset_parser (); |
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122 |
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123 retval = yyparse (); |
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124 |
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125 if (retval == 0 && global_command) |
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126 { |
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2898
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127 global_command->eval (); |
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2299
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128 |
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1907
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129 delete global_command; |
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2299
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130 |
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2620
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131 global_command = 0; |
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132 |
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133 if (! (interactive || forced_interactive)) |
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134 { |
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2985
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135 bool quit = (tree_return_command::returning |
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136 || tree_break_command::breaking); |
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2620
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137 |
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2985
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138 if (tree_return_command::returning) |
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139 tree_return_command::returning = 0; |
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140 |
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141 if (tree_break_command::breaking) |
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142 tree_break_command::breaking--; |
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143 |
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144 if (quit) |
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145 break; |
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146 } |
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147 |
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148 if (error_state) |
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149 { |
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150 if (! (interactive || forced_interactive)) |
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151 break; |
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152 } |
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2299
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153 else |
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2620
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154 { |
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155 if (octave_completion_matches_called) |
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156 octave_completion_matches_called = false; |
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157 else |
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2973
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158 command_editor::increment_current_command_number (); |
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2620
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159 } |
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1907
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160 } |
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161 } |
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162 while (retval == 0); |
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163 |
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164 return retval; |
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165 } |
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166 |
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167 // Fix up things before exiting. |
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168 |
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169 void |
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170 clean_up_and_exit (int retval) |
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171 { |
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2926
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172 command_editor::restore_terminal_state (); |
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173 |
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174 // XXX FIXME XXX -- is this needed? Can it cause any trouble? |
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175 raw_mode (0); |
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176 |
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2926
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177 command_history::clean_up_and_save (); |
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178 |
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179 close_plot_stream (); |
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180 |
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181 close_files (); |
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182 |
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183 cleanup_tmp_files (); |
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184 |
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185 if (!quitting_gracefully && (interactive || forced_interactive)) |
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186 cout << "\n"; |
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187 |
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188 if (retval == EOF) |
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189 retval = 0; |
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190 |
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191 exit (retval); |
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192 |
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193 // This is bogus but should prevent g++ from giving a warning saying |
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194 // that this volatile function does return. |
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195 |
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196 panic_impossible (); |
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197 } |
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198 |
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1957
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199 DEFUN_TEXT (casesen, args, , |
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200 "casesen [on|off]") |
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201 { |
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2086
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202 octave_value_list retval; |
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203 |
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1755
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204 int argc = args.length () + 1; |
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205 |
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1965
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206 string_vector argv = args.make_argv ("casesen"); |
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207 |
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1755
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208 if (error_state) |
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209 return retval; |
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210 |
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211 if (argc == 1 || (argc > 1 && argv[1] == "off")) |
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212 warning ("casesen: sorry, Octave is always case sensitive"); |
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213 else if (argc > 1 && argv[1] == "on") |
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214 ; // ok. |
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215 else |
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216 print_usage ("casesen"); |
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217 |
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218 return retval; |
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219 } |
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220 |
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1957
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221 DEFUN (computer, args, nargout, |
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222 "computer ():\n\ |
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223 \n\ |
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224 Have Octave ask the system, \"What kind of computer are you?\"") |
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225 { |
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2086
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226 octave_value_list retval; |
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227 |
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228 int nargin = args.length (); |
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229 |
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230 if (nargin != 0) |
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231 warning ("computer: ignoring extra arguments"); |
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232 |
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2095
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233 string msg; |
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234 |
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235 if (strcmp (TARGET_HOST_TYPE, "unknown") == 0) |
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236 msg = "Hi Dave, I'm a HAL-9000"; |
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237 else |
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238 msg = TARGET_HOST_TYPE; |
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239 |
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240 if (nargout == 0) |
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241 octave_stdout << msg << "\n"; |
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242 else |
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243 retval = msg; |
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244 |
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245 return retval; |
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246 } |
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247 |
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2068
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248 DEFUN (quit, args, , |
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249 "quit (STATUS): exit Octave gracefully, returning STATUS to the system.\n\ |
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250 \n\ |
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251 STATUS should be an integer value. If STATUS is missing, 0 is assumed.") |
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252 { |
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2086
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253 octave_value_list retval; |
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2068
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254 |
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255 int exit_status = 0; |
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256 |
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3020
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257 quitting_gracefully = true; |
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2068
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258 |
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259 int nargin = args.length (); |
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260 |
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261 if (nargin > 0) |
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2068
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262 { |
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263 // XXX FIXME XXX -- need a safe uniform way to do this. |
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264 |
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2068
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265 double tmp = args(0).double_value (); |
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266 |
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2068
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267 if (! error_state && ! xisnan (tmp)) |
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268 exit_status = NINT (tmp); |
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269 } |
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270 |
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271 clean_up_and_exit (exit_status); |
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272 |
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1683
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273 return retval; |
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274 } |
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275 |
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276 DEFALIAS (exit, quit); |
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277 |
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1957
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278 DEFUN (warranty, , , |
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279 "warranty (): describe copying conditions") |
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280 { |
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2086
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281 octave_value_list retval; |
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282 |
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2095
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283 octave_stdout << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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284 This program is free software; you can redistribute it and/or modify\n\ |
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285 it under the terms of the GNU General Public License as published by\n\ |
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286 the Free Software Foundation; either version 2 of the License, or\n\ |
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287 (at your option) any later version.\n\ |
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288 \n\ |
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289 This program is distributed in the hope that it will be useful,\n\ |
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290 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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291 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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292 GNU General Public License for more details.\n\ |
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293 \n\ |
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294 You should have received a copy of the GNU General Public License\n\ |
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295 along with this program. If not, write to the Free Software\n\ |
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296 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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297 \n"; |
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298 |
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299 return retval; |
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300 } |
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301 |
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302 // Execute a shell command. |
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303 |
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1965
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304 static void |
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305 cleanup_iprocstream (void *p) |
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306 { |
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2800
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307 delete static_cast<iprocstream *> (p); |
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1965
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308 } |
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309 |
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2086
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310 static octave_value_list |
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2321
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311 run_command_and_return_output (const string& cmd_str) |
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2083
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312 { |
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2086
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313 octave_value_list retval; |
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2083
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314 |
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315 iprocstream *cmd = new iprocstream (cmd_str.c_str ()); |
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316 |
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2985
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317 unwind_protect::add (cleanup_iprocstream, cmd); |
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2083
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318 |
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319 int status = 127; |
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320 |
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321 if (cmd && *cmd) |
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322 { |
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323 ostrstream output_buf; |
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2095
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324 |
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2083
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325 char ch; |
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326 while (cmd->get (ch)) |
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2321
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327 output_buf.put (ch); |
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2083
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328 |
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329 status = cmd->close (); |
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330 |
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331 // The value in status is as returned by waitpid. If the |
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332 // process exited normally, extract the actual exit status of |
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333 // the command. Otherwise, return 127 as a failure code. |
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334 |
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2693
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335 if (WIFEXITED (status)) |
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336 status = WEXITSTATUS (status); |
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2083
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337 |
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2321
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338 output_buf << ends; |
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2145
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339 |
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2321
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340 char *msg = output_buf.str (); |
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2083
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341 |
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2800
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342 retval(1) = static_cast<double> (status); |
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2321
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343 retval(0) = msg; |
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2083
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344 |
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2321
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345 delete [] msg; |
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2083
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346 } |
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347 else |
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348 error ("unable to start subprocess for `%s'", cmd_str.c_str ()); |
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349 |
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2985
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350 unwind_protect::run (); |
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2083
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351 |
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352 return retval; |
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353 } |
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354 |
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1957
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355 DEFUN (system, args, nargout, |
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2083
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356 "system (STRING [, RETURN_OUTPUT] [, TYPE])\n\ |
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357 \n\ |
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358 Execute the shell command specified by STRING.\n\ |
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359 \n\ |
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360 If TYPE is \"async\", the process is started in the background and the\n\ |
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361 pid of the child proces is returned immediately. Otherwise, the\n\ |
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362 process is started, and Octave waits until it exits. If TYPE argument\n\ |
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363 is omitted, a value of \"sync\" is assumed.\n\ |
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364 \n\ |
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365 If NARGIN == 2 (the actual value of RETURN_OUTPUT is irrelevant) and\n\ |
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366 the subprocess is started synchronously, or if system() is called with\n\ |
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367 NARGIN == 1 and NARGOUT > 0, the output from the command is returned.\n\ |
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368 Otherwise, if the subprocess is executed synchronously, it's output is\n\ |
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2321
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369 sent to the standard output. To send the output of a command executed\n\ |
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370 with system() through the pager, use a command like\n\ |
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371 \n\ |
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372 disp (system (CMD, 1));\n\ |
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373 \n\ |
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374 or\n\ |
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375 \n\ |
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2322
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376 printf (\"%s\\n\", system (CMD, 1));") |
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1683
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377 { |
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2086
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378 octave_value_list retval; |
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1683
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379 |
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380 int nargin = args.length (); |
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381 |
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2083
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382 if (nargin > 0 && nargin < 4) |
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1683
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383 { |
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2083
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384 bool return_output = (nargout > 0 || nargin > 1); |
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385 |
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386 string cmd_str = args(0).string_value (); |
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387 |
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388 enum exec_type { sync, async }; |
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389 |
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390 exec_type type = sync; |
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391 |
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392 if (! error_state) |
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393 { |
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394 if (nargin > 2) |
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395 { |
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396 string type_str = args(2).string_value (); |
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1683
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397 |
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2083
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398 if (! error_state) |
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399 { |
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400 if (type_str == "sync") |
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401 type = sync; |
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402 else if (type_str == "async") |
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403 type = async; |
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404 else |
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405 error ("system: third arg must be \"sync\" or \"async\""); |
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406 } |
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407 else |
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408 error ("system: third argument must be a string"); |
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409 } |
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410 } |
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411 else |
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412 error ("system: expecting string as first argument"); |
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1683
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413 |
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2083
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414 if (! error_state) |
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415 { |
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416 if (type == async) |
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417 { |
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418 pid_t pid = fork (); |
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419 |
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420 if (pid < 0) |
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421 error ("system: fork failed -- can't create child process"); |
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422 else if (pid == 0) |
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423 { |
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424 system (cmd_str.c_str ()); |
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425 exit (0); |
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426 retval(0) = 0.0; |
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427 } |
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428 else |
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2800
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429 retval(0) = static_cast<double> (pid); |
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2083
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430 } |
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2321
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431 else if (return_output) |
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432 retval = run_command_and_return_output (cmd_str); |
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2083
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433 else |
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2321
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434 { |
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435 int status = system (cmd_str.c_str ()); |
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436 |
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437 // The value in status is as returned by waitpid. If |
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438 // the process exited normally, extract the actual exit |
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439 // status of the command. Otherwise, return 127 as a |
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440 // failure code. |
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441 |
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2693
|
442 if (WIFEXITED (status)) |
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443 status = WEXITSTATUS (status); |
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2321
|
444 |
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2800
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445 retval = static_cast<double> (status); |
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2321
|
446 } |
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2083
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447 } |
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1683
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448 } |
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449 else |
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2083
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450 print_usage ("system"); |
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1683
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451 |
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452 return retval; |
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453 } |
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454 |
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455 DEFALIAS (shell_cmd, system); |
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456 |
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2614
|
457 // XXX FIXME XXX -- this should really be static, but that causes |
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|
458 // problems on some systems. |
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|
459 SLStack<string> octave_atexit_functions; |
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2077
|
460 |
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461 void |
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|
462 do_octave_atexit (void) |
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463 { |
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464 while (! octave_atexit_functions.empty ()) |
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|
465 { |
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2086
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466 octave_value_list fcn = octave_atexit_functions.pop (); |
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2077
|
467 |
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2942
|
468 feval (fcn, 0); |
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2077
|
469 } |
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470 } |
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471 |
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2162
|
472 DEFUN (atexit, args, , |
|
2077
|
473 "atexit (NAME): register NAME as a function to call when Octave exits\n\ |
|
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474 \n\ |
|
2802
|
475 Functions are called with no arguments in the reverse of the order in\n\ |
|
2077
|
476 which they were registered with atexit()") |
|
|
477 { |
|
2086
|
478 octave_value_list retval; |
|
2077
|
479 |
|
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480 int nargin = args.length (); |
|
|
481 |
|
|
482 if (nargin == 1) |
|
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483 { |
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2475
|
484 #if defined (HAVE_ATEXIT) || defined (HAVE_ON_EXIT) |
|
2077
|
485 string arg = args(0).string_value (); |
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|
486 |
|
|
487 if (! error_state) |
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488 octave_atexit_functions.push (arg); |
|
|
489 else |
|
|
490 error ("atexit: argument must be a string"); |
|
2475
|
491 #else |
|
|
492 gripe_not_supported ("atexit"); |
|
|
493 #endif |
|
2077
|
494 } |
|
|
495 else |
|
|
496 print_usage ("atexit"); |
|
|
497 |
|
|
498 return retval; |
|
|
499 } |
|
|
500 |
|
2689
|
501 DEFUN (octave_config_info, args, , |
|
|
502 "octave_config_info (OPTION)\n\ |
|
|
503 \n\ |
|
|
504 If OPTION is a string, return the configuration information for the\n\ |
|
|
505 specified option.\n\ |
|
|
506 \n\ |
|
|
507 With no arguments, return a structure containing configuration\n\ |
|
|
508 information.") |
|
2162
|
509 { |
|
2689
|
510 octave_value retval; |
|
|
511 |
|
2696
|
512 #if defined (WITH_DYNAMIC_LINKING) && (defined (WITH_DL) || defined (WITH_SHL)) |
|
2689
|
513 bool octave_supports_dynamic_linking = true; |
|
|
514 #else |
|
|
515 bool octave_supports_dynamic_linking = false; |
|
|
516 #endif |
|
|
517 |
|
2162
|
518 Octave_map m; |
|
|
519 |
|
|
520 m ["default_pager"] = DEFAULT_PAGER; |
|
|
521 m ["prefix"] = OCTAVE_PREFIX; |
|
|
522 m ["exec_prefix"] = OCTAVE_EXEC_PREFIX; |
|
|
523 m ["datadir"] = OCTAVE_DATADIR; |
|
2800
|
524 m ["dld"] = static_cast<double> (octave_supports_dynamic_linking); |
|
2162
|
525 m ["libdir"] = OCTAVE_LIBDIR; |
|
|
526 m ["bindir"] = OCTAVE_BINDIR; |
|
|
527 m ["infodir"] = OCTAVE_INFODIR; |
|
|
528 m ["fcnfiledir"] = OCTAVE_FCNFILEDIR; |
|
|
529 m ["localfcnfiledir"] = OCTAVE_LOCALFCNFILEDIR; |
|
|
530 m ["localstartupfiledir"] = OCTAVE_LOCALSTARTUPFILEDIR; |
|
|
531 m ["startupfiledir"] = OCTAVE_STARTUPFILEDIR; |
|
|
532 m ["localfcnfilepath"] = OCTAVE_LOCALFCNFILEPATH; |
|
|
533 m ["archlibdir"] = OCTAVE_ARCHLIBDIR; |
|
2439
|
534 m ["localarchlibdir"] = OCTAVE_LOCALARCHLIBDIR; |
|
2162
|
535 m ["octfiledir"] = OCTAVE_OCTFILEDIR; |
|
|
536 m ["localoctfilepath"] = OCTAVE_LOCALOCTFILEPATH; |
|
|
537 m ["fcnfilepath"] = OCTAVE_FCNFILEPATH; |
|
|
538 m ["imagepath"] = OCTAVE_IMAGEPATH; |
|
|
539 m ["target_host_type"] = TARGET_HOST_TYPE; |
|
|
540 m ["configure_options"] = config_opts; |
|
|
541 m ["F77"] = F77; |
|
|
542 m ["FFLAGS"] = FFLAGS; |
|
|
543 m ["FPICFLAG"] = FPICFLAG; |
|
|
544 m ["F2C"] = F2C; |
|
|
545 m ["F2CFLAGS"] = F2CFLAGS; |
|
|
546 m ["FLIBS"] = FLIBS; |
|
|
547 m ["CPPFLAGS"] = CPPFLAGS; |
|
|
548 m ["INCFLAGS"] = INCFLAGS; |
|
|
549 m ["CC"] = CC " " CC_VERSION; |
|
|
550 m ["CFLAGS"] = CFLAGS; |
|
|
551 m ["CPICFLAG"] = CPICFLAG; |
|
|
552 m ["CXX"] = CXX " " CXX_VERSION; |
|
|
553 m ["CXXFLAGS"] = CXXFLAGS; |
|
|
554 m ["CXXPICFLAG"] = CXXPICFLAG; |
|
|
555 m ["LDFLAGS"] = LDFLAGS; |
|
|
556 m ["LIBFLAGS"] = LIBFLAGS; |
|
2675
|
557 m ["RLD_FLAG"] = RLD_FLAG; |
|
2162
|
558 m ["TERMLIBS"] = TERMLIBS; |
|
|
559 m ["LIBS"] = LIBS; |
|
|
560 m ["LEXLIB"] = LEXLIB; |
|
|
561 m ["LIBPLPLOT"] = LIBPLPLOT; |
|
|
562 m ["LIBDLFCN"] = LIBDLFCN; |
|
|
563 m ["DEFS"] = DEFS; |
|
|
564 |
|
2689
|
565 int nargin = args.length (); |
|
|
566 |
|
|
567 if (nargin == 1) |
|
|
568 { |
|
|
569 string arg = args(0).string_value (); |
|
|
570 |
|
|
571 if (! error_state) |
|
|
572 retval = octave_value (m [arg.c_str ()]); |
|
|
573 } |
|
|
574 else if (nargin == 0) |
|
|
575 retval = octave_value (m); |
|
|
576 else |
|
|
577 print_usage ("octave_config_info"); |
|
|
578 |
|
|
579 return retval; |
|
2162
|
580 } |
|
|
581 |
|
1683
|
582 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
|
2806
|
583 |
|
1683
|
584 int debug_new_delete = 0; |
|
|
585 |
|
|
586 typedef void (*vfp)(void); |
|
|
587 extern vfp __new_handler; |
|
|
588 |
|
|
589 void * |
|
|
590 __builtin_new (size_t sz) |
|
|
591 { |
|
|
592 void *p; |
|
|
593 |
|
|
594 /* malloc (0) is unpredictable; avoid it. */ |
|
|
595 if (sz == 0) |
|
|
596 sz = 1; |
|
2800
|
597 p = malloc (sz); |
|
1683
|
598 while (p == 0) |
|
|
599 { |
|
|
600 (*__new_handler) (); |
|
2800
|
601 p = malloc (sz); |
|
1683
|
602 } |
|
|
603 |
|
|
604 if (debug_new_delete) |
|
|
605 cout << "__builtin_new: " << p << endl; |
|
|
606 |
|
|
607 return p; |
|
|
608 } |
|
|
609 |
|
|
610 void |
|
|
611 __builtin_delete (void *ptr) |
|
|
612 { |
|
|
613 if (debug_new_delete) |
|
|
614 cout << "__builtin_delete: " << ptr << endl; |
|
|
615 |
|
|
616 if (ptr) |
|
|
617 free (ptr); |
|
|
618 } |
|
2806
|
619 |
|
1683
|
620 #endif |
|
|
621 |
|
2806
|
622 void |
|
|
623 symbols_of_toplev (void) |
|
|
624 { |
|
3020
|
625 DEFCONST (argv, , 0, 0, |
|
|
626 "the command line arguments this program was invoked with"); |
|
2806
|
627 |
|
3020
|
628 DEFCONST (program_invocation_name, |
|
|
629 octave_env::get_program_invocation_name (), 0, 0, |
|
|
630 "the full name of the current program or script, including the\n\ |
|
|
631 directory specification"); |
|
|
632 |
|
|
633 DEFCONST (program_name, octave_env::get_program_name (), 0, 0, |
|
|
634 "the name of the current program or script"); |
|
2806
|
635 } |
|
|
636 |
|
1683
|
637 /* |
|
|
638 ;;; Local Variables: *** |
|
|
639 ;;; mode: C++ *** |
|
|
640 ;;; End: *** |
|
|
641 */ |
