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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 |
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1728
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33 #include <string> |
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34 |
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1683
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35 #include <fstream.h> |
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36 #include <iostream.h> |
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37 #include <strstream.h> |
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38 |
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39 #ifdef HAVE_UNISTD_H |
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2442
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40 #ifdef HAVE_SYS_TYPES_H |
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1683
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41 #include <sys/types.h> |
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2442
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42 #endif |
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43 #include <unistd.h> |
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44 #endif |
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45 |
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2926
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46 #include "cmd-edit.h" |
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47 #include "file-ops.h" |
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1683
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48 #include "lo-error.h" |
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2370
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49 #include "lo-mappers.h" |
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3020
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50 #include "oct-env.h" |
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1755
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51 #include "str-vec.h" |
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52 |
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2492
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53 #include <defaults.h> |
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1683
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54 #include "defun.h" |
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55 #include "dynamic-ld.h" |
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56 #include "error.h" |
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57 #include "file-io.h" |
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58 #include "input.h" |
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59 #include "lex.h" |
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2492
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60 #include <oct-conf.h> |
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1742
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61 #include "oct-hist.h" |
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2162
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62 #include "oct-map.h" |
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2862
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63 #include "oct-obj.h" |
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1683
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64 #include "pager.h" |
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65 #include "parse.h" |
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66 #include "pathsearch.h" |
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67 #include "procstream.h" |
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2370
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68 #include "ov.h" |
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2985
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69 #include "pt-jump.h" |
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1750
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70 #include "pt-plot.h" |
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2982
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71 #include "pt-stmt.h" |
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72 #include "sighandlers.h" |
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73 #include "sysdep.h" |
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2693
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74 #include "syswait.h" |
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1750
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75 #include "toplev.h" |
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76 #include "unwind-prot.h" |
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77 #include "utils.h" |
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78 #include "variables.h" |
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2492
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79 #include <version.h> |
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80 |
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3020
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81 // TRUE means we are exiting via the builtin exit or quit functions. |
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82 static bool quitting_gracefully = false; |
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83 |
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84 // Current command to execute. |
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85 tree_statement_list *global_command = 0; |
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86 |
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87 // Pointer to function that is currently being evaluated. |
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2891
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88 octave_user_function *curr_function = 0; |
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89 |
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1907
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90 // Top level context (?) |
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91 jmp_buf toplevel; |
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92 |
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93 int |
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94 main_loop (void) |
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95 { |
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96 // Allow the user to interrupt us without exiting. |
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97 |
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98 octave_save_signal_mask (); |
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99 |
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1907
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100 if (setjmp (toplevel) != 0) |
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101 { |
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102 raw_mode (0); |
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103 |
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104 cout << "\n"; |
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105 |
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106 octave_restore_signal_mask (); |
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1907
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107 } |
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108 |
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3020
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109 can_interrupt = true; |
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1907
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110 |
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2554
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111 octave_catch_interrupts (); |
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1907
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112 |
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113 // The big loop. |
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114 |
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115 int retval; |
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116 do |
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117 { |
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118 curr_sym_tab = top_level_sym_tab; |
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119 |
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120 reset_parser (); |
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121 |
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122 retval = yyparse (); |
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123 |
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124 if (retval == 0 && global_command) |
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125 { |
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2898
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126 global_command->eval (); |
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2299
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127 |
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1907
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128 delete global_command; |
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2299
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129 |
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2620
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130 global_command = 0; |
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131 |
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132 if (! (interactive || forced_interactive)) |
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133 { |
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2985
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134 bool quit = (tree_return_command::returning |
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135 || tree_break_command::breaking); |
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2620
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136 |
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2985
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137 if (tree_return_command::returning) |
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138 tree_return_command::returning = 0; |
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2620
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139 |
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2985
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140 if (tree_break_command::breaking) |
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141 tree_break_command::breaking--; |
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2620
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142 |
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143 if (quit) |
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144 break; |
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145 } |
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146 |
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147 if (error_state) |
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148 { |
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149 if (! (interactive || forced_interactive)) |
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150 break; |
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151 } |
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2299
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152 else |
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2620
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153 { |
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154 if (octave_completion_matches_called) |
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155 octave_completion_matches_called = false; |
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156 else |
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2973
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157 command_editor::increment_current_command_number (); |
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2620
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158 } |
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1907
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159 } |
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160 } |
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161 while (retval == 0); |
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162 |
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163 return retval; |
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164 } |
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165 |
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1683
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166 // Fix up things before exiting. |
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167 |
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168 void |
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3162
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169 clean_up_and_exit (int retval) |
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170 { |
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3216
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171 do_octave_atexit (); |
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172 |
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3162
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173 exit (retval == EOF ? 0 : retval); |
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174 } |
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175 |
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1957
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176 DEFUN_TEXT (casesen, args, , |
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177 "casesen [on|off]") |
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178 { |
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2086
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179 octave_value_list retval; |
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180 |
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1755
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181 int argc = args.length () + 1; |
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182 |
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1965
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183 string_vector argv = args.make_argv ("casesen"); |
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184 |
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1755
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185 if (error_state) |
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186 return retval; |
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187 |
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188 if (argc == 1 || (argc > 1 && argv[1] == "off")) |
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189 warning ("casesen: sorry, Octave is always case sensitive"); |
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190 else if (argc > 1 && argv[1] == "on") |
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191 ; // ok. |
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192 else |
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193 print_usage ("casesen"); |
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194 |
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195 return retval; |
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196 } |
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197 |
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1957
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198 DEFUN (computer, args, nargout, |
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199 "computer ():\n\ |
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200 \n\ |
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201 Have Octave ask the system, \"What kind of computer are you?\"") |
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202 { |
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2086
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203 octave_value_list retval; |
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204 |
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205 int nargin = args.length (); |
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206 |
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207 if (nargin != 0) |
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208 warning ("computer: ignoring extra arguments"); |
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209 |
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2095
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210 string msg; |
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211 |
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3234
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212 if (strcmp (CANONICAL_HOST_TYPE, "unknown") == 0) |
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213 msg = "Hi Dave, I'm a HAL-9000"; |
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214 else |
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3234
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215 msg = CANONICAL_HOST_TYPE; |
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216 |
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217 if (nargout == 0) |
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218 octave_stdout << msg << "\n"; |
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219 else |
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220 retval = msg; |
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221 |
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222 return retval; |
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223 } |
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224 |
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3180
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225 DEFUN (quit, args, nargout, |
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2068
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226 "quit (STATUS): exit Octave gracefully, returning STATUS to the system.\n\ |
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227 \n\ |
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228 STATUS should be an integer value. If STATUS is missing, 0 is assumed.") |
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229 { |
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2086
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230 octave_value_list retval; |
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2068
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231 |
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3180
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232 if (nargout == 0) |
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2068
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233 { |
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3180
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234 int exit_status = 0; |
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235 |
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236 quitting_gracefully = true; |
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237 |
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3180
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238 if (args.length () > 0) |
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239 { |
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3202
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240 int tmp = args(0).nint_value (); |
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241 |
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3202
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242 if (! error_state) |
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243 exit_status = tmp; |
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3180
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244 } |
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245 |
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246 clean_up_and_exit (exit_status); |
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2068
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247 } |
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3180
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248 else |
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249 error ("quit: invalid number of output arguments"); |
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2068
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250 |
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251 return retval; |
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252 } |
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253 |
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254 DEFALIAS (exit, quit); |
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255 |
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1957
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256 DEFUN (warranty, , , |
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257 "warranty (): describe copying conditions") |
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258 { |
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2086
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259 octave_value_list retval; |
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260 |
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2095
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261 octave_stdout << "\n" OCTAVE_NAME_VERSION_AND_COPYRIGHT "\n\n\ |
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262 This program is free software; you can redistribute it and/or modify\n\ |
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263 it under the terms of the GNU General Public License as published by\n\ |
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264 the Free Software Foundation; either version 2 of the License, or\n\ |
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265 (at your option) any later version.\n\ |
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266 \n\ |
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267 This program is distributed in the hope that it will be useful,\n\ |
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268 but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ |
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269 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ |
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270 GNU General Public License for more details.\n\ |
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271 \n\ |
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272 You should have received a copy of the GNU General Public License\n\ |
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273 along with this program. If not, write to the Free Software\n\ |
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274 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.\n\ |
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275 \n"; |
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276 |
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277 return retval; |
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278 } |
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279 |
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280 // Execute a shell command. |
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281 |
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1965
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282 static void |
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283 cleanup_iprocstream (void *p) |
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284 { |
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3060
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285 iprocstream *cmd = static_cast<iprocstream *> (p); |
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286 |
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287 octave_child_list::remove (cmd->pid ()); |
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288 |
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289 delete cmd; |
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1965
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290 } |
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291 |
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2086
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292 static octave_value_list |
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2321
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293 run_command_and_return_output (const string& cmd_str) |
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2083
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294 { |
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2086
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295 octave_value_list retval; |
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2083
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296 |
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297 iprocstream *cmd = new iprocstream (cmd_str.c_str ()); |
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298 |
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3060
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299 if (cmd) |
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2083
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300 { |
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3060
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301 unwind_protect::add (cleanup_iprocstream, cmd); |
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302 |
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303 if (*cmd) |
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304 { |
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305 ostrstream output_buf; |
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2095
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306 |
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3147
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307 // XXX FIXME XXX -- sometimes, the subprocess hasn't written |
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308 // anything before we try to read from the procstream. The |
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309 // kluge below (simply waiting and trying again) is ugly, |
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310 // but it seems to work, at least most of the time. It |
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311 // could probably still fail if the subprocess hasn't |
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312 // started writing after the snooze. Isn't there a better |
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313 // way? If there is, you should also fix the code for the |
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314 // ls function in dirfns.cc. |
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315 |
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3060
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316 char ch; |
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3147
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317 |
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318 if (cmd->get (ch)) |
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319 output_buf.put (ch); |
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320 else |
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321 { |
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322 cmd->clear (); |
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323 |
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324 #if defined (HAVE_USLEEP) |
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325 usleep (100); |
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326 #else |
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327 sleep (1); |
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328 #endif |
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329 } |
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330 |
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3060
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331 while (cmd->get (ch)) |
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332 output_buf.put (ch); |
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2083
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333 |
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3252
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334 int cmd_status = cmd->close (); |
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2083
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335 |
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3060
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336 if (WIFEXITED (cmd_status)) |
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337 cmd_status = WEXITSTATUS (cmd_status); |
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338 else |
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339 cmd_status = 127; |
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2083
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340 |
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3060
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341 output_buf << ends; |
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2145
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342 |
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3060
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343 char *msg = output_buf.str (); |
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2083
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344 |
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3060
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345 retval(1) = (double) cmd_status; |
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346 retval(0) = msg; |
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2083
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347 |
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3060
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348 delete [] msg; |
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349 } |
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350 |
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351 unwind_protect::run (); |
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2083
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352 } |
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353 else |
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354 error ("unable to start subprocess for `%s'", cmd_str.c_str ()); |
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355 |
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356 return retval; |
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357 } |
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358 |
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1957
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359 DEFUN (system, args, nargout, |
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2083
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360 "system (STRING [, RETURN_OUTPUT] [, TYPE])\n\ |
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361 \n\ |
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362 Execute the shell command specified by STRING.\n\ |
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363 \n\ |
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364 If TYPE is \"async\", the process is started in the background and the\n\ |
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365 pid of the child proces is returned immediately. Otherwise, the\n\ |
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366 process is started, and Octave waits until it exits. If TYPE argument\n\ |
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367 is omitted, a value of \"sync\" is assumed.\n\ |
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368 \n\ |
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369 If NARGIN == 2 (the actual value of RETURN_OUTPUT is irrelevant) and\n\ |
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370 the subprocess is started synchronously, or if system() is called with\n\ |
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371 NARGIN == 1 and NARGOUT > 0, the output from the command is returned.\n\ |
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372 Otherwise, if the subprocess is executed synchronously, it's output is\n\ |
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2321
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373 sent to the standard output. To send the output of a command executed\n\ |
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374 with system() through the pager, use a command like\n\ |
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375 \n\ |
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376 disp (system (CMD, 1));\n\ |
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377 \n\ |
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378 or\n\ |
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379 \n\ |
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2322
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380 printf (\"%s\\n\", system (CMD, 1));") |
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1683
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381 { |
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2086
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382 octave_value_list retval; |
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1683
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383 |
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384 int nargin = args.length (); |
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385 |
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2083
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386 if (nargin > 0 && nargin < 4) |
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1683
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387 { |
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2083
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388 bool return_output = (nargout > 0 || nargin > 1); |
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389 |
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390 string cmd_str = args(0).string_value (); |
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391 |
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392 enum exec_type { sync, async }; |
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393 |
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394 exec_type type = sync; |
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395 |
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396 if (! error_state) |
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397 { |
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398 if (nargin > 2) |
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399 { |
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400 string type_str = args(2).string_value (); |
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1683
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401 |
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2083
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402 if (! error_state) |
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403 { |
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404 if (type_str == "sync") |
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405 type = sync; |
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406 else if (type_str == "async") |
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407 type = async; |
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408 else |
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409 error ("system: third arg must be \"sync\" or \"async\""); |
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410 } |
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411 else |
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412 error ("system: third argument must be a string"); |
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413 } |
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414 } |
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415 else |
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416 error ("system: expecting string as first argument"); |
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1683
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417 |
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2083
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418 if (! error_state) |
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419 { |
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420 if (type == async) |
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421 { |
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422 pid_t pid = fork (); |
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423 |
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424 if (pid < 0) |
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425 error ("system: fork failed -- can't create child process"); |
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426 else if (pid == 0) |
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427 { |
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3273
|
428 // XXX FIXME XXX -- should probably replace this |
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429 // call with something portable. |
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430 |
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431 execl ("/bin/sh", "sh", "-c", cmd_str.c_str (), 0); |
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432 |
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433 panic_impossible (); |
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2083
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434 } |
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435 else |
|
2800
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436 retval(0) = static_cast<double> (pid); |
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2083
|
437 } |
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2321
|
438 else if (return_output) |
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439 retval = run_command_and_return_output (cmd_str); |
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2083
|
440 else |
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2321
|
441 { |
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442 int status = system (cmd_str.c_str ()); |
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443 |
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444 // The value in status is as returned by waitpid. If |
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445 // the process exited normally, extract the actual exit |
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446 // status of the command. Otherwise, return 127 as a |
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447 // failure code. |
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448 |
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2693
|
449 if (WIFEXITED (status)) |
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450 status = WEXITSTATUS (status); |
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2321
|
451 |
|
2800
|
452 retval = static_cast<double> (status); |
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2321
|
453 } |
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2083
|
454 } |
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1683
|
455 } |
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456 else |
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2083
|
457 print_usage ("system"); |
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1683
|
458 |
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459 return retval; |
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|
460 } |
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|
461 |
|
|
462 DEFALIAS (shell_cmd, system); |
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|
463 |
|
2614
|
464 // XXX FIXME XXX -- this should really be static, but that causes |
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|
465 // problems on some systems. |
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|
466 SLStack<string> octave_atexit_functions; |
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2077
|
467 |
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|
468 void |
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469 do_octave_atexit (void) |
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470 { |
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3216
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471 static bool deja_vu = false; |
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472 |
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2077
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473 while (! octave_atexit_functions.empty ()) |
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474 { |
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2086
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475 octave_value_list fcn = octave_atexit_functions.pop (); |
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2077
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476 |
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2942
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477 feval (fcn, 0); |
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3215
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478 |
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479 flush_octave_stdout (); |
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2077
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480 } |
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3216
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481 |
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482 if (! deja_vu) |
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483 { |
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484 deja_vu = true; |
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485 |
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486 command_editor::restore_terminal_state (); |
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487 |
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488 // XXX FIXME XXX -- is this needed? Can it cause any trouble? |
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489 raw_mode (0); |
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490 |
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491 command_history::clean_up_and_save (); |
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492 |
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493 close_plot_stream (); |
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494 |
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495 close_files (); |
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496 |
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497 cleanup_tmp_files (); |
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498 |
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499 flush_octave_stdout (); |
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500 |
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501 if (!quitting_gracefully && (interactive || forced_interactive)) |
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502 cout << "\n"; |
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503 } |
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2077
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504 } |
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505 |
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2162
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506 DEFUN (atexit, args, , |
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2077
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507 "atexit (NAME): register NAME as a function to call when Octave exits\n\ |
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508 \n\ |
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2802
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509 Functions are called with no arguments in the reverse of the order in\n\ |
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2077
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510 which they were registered with atexit()") |
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511 { |
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2086
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512 octave_value_list retval; |
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2077
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513 |
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514 int nargin = args.length (); |
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515 |
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516 if (nargin == 1) |
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517 { |
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2475
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518 #if defined (HAVE_ATEXIT) || defined (HAVE_ON_EXIT) |
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2077
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519 string arg = args(0).string_value (); |
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520 |
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521 if (! error_state) |
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522 octave_atexit_functions.push (arg); |
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523 else |
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524 error ("atexit: argument must be a string"); |
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2475
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525 #else |
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526 gripe_not_supported ("atexit"); |
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527 #endif |
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2077
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528 } |
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529 else |
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530 print_usage ("atexit"); |
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531 |
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532 return retval; |
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533 } |
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534 |
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2689
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535 DEFUN (octave_config_info, args, , |
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536 "octave_config_info (OPTION)\n\ |
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537 \n\ |
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538 If OPTION is a string, return the configuration information for the\n\ |
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539 specified option.\n\ |
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540 \n\ |
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541 With no arguments, return a structure containing configuration\n\ |
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542 information.") |
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2162
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543 { |
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2689
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544 octave_value retval; |
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545 |
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2696
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546 #if defined (WITH_DYNAMIC_LINKING) && (defined (WITH_DL) || defined (WITH_SHL)) |
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2689
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547 bool octave_supports_dynamic_linking = true; |
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548 #else |
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549 bool octave_supports_dynamic_linking = false; |
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550 #endif |
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551 |
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2162
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552 Octave_map m; |
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553 |
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3141
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554 // XXX FIXME XXX -- should we perform OCTAVE_HOME substitution on these? |
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555 |
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2162
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556 m ["default_pager"] = DEFAULT_PAGER; |
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557 m ["prefix"] = OCTAVE_PREFIX; |
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558 m ["exec_prefix"] = OCTAVE_EXEC_PREFIX; |
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559 m ["datadir"] = OCTAVE_DATADIR; |
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2800
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560 m ["dld"] = static_cast<double> (octave_supports_dynamic_linking); |
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2162
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561 m ["libdir"] = OCTAVE_LIBDIR; |
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562 m ["bindir"] = OCTAVE_BINDIR; |
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563 m ["infodir"] = OCTAVE_INFODIR; |
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564 m ["fcnfiledir"] = OCTAVE_FCNFILEDIR; |
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565 m ["localfcnfiledir"] = OCTAVE_LOCALFCNFILEDIR; |
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566 m ["localstartupfiledir"] = OCTAVE_LOCALSTARTUPFILEDIR; |
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567 m ["startupfiledir"] = OCTAVE_STARTUPFILEDIR; |
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568 m ["localfcnfilepath"] = OCTAVE_LOCALFCNFILEPATH; |
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569 m ["archlibdir"] = OCTAVE_ARCHLIBDIR; |
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2439
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570 m ["localarchlibdir"] = OCTAVE_LOCALARCHLIBDIR; |
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2162
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571 m ["octfiledir"] = OCTAVE_OCTFILEDIR; |
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572 m ["localoctfilepath"] = OCTAVE_LOCALOCTFILEPATH; |
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573 m ["fcnfilepath"] = OCTAVE_FCNFILEPATH; |
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574 m ["imagepath"] = OCTAVE_IMAGEPATH; |
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3234
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575 m ["canonical_host_type"] = CANONICAL_HOST_TYPE; |
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2162
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576 m ["configure_options"] = config_opts; |
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577 m ["F77"] = F77; |
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578 m ["FFLAGS"] = FFLAGS; |
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579 m ["FPICFLAG"] = FPICFLAG; |
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580 m ["F2C"] = F2C; |
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581 m ["F2CFLAGS"] = F2CFLAGS; |
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582 m ["FLIBS"] = FLIBS; |
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583 m ["CPPFLAGS"] = CPPFLAGS; |
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584 m ["INCFLAGS"] = INCFLAGS; |
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585 m ["CC"] = CC " " CC_VERSION; |
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586 m ["CFLAGS"] = CFLAGS; |
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587 m ["CPICFLAG"] = CPICFLAG; |
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588 m ["CXX"] = CXX " " CXX_VERSION; |
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589 m ["CXXFLAGS"] = CXXFLAGS; |
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590 m ["CXXPICFLAG"] = CXXPICFLAG; |
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591 m ["LDFLAGS"] = LDFLAGS; |
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592 m ["LIBFLAGS"] = LIBFLAGS; |
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2675
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593 m ["RLD_FLAG"] = RLD_FLAG; |
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2162
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594 m ["TERMLIBS"] = TERMLIBS; |
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595 m ["LIBS"] = LIBS; |
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596 m ["LEXLIB"] = LEXLIB; |
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597 m ["LIBPLPLOT"] = LIBPLPLOT; |
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598 m ["LIBDLFCN"] = LIBDLFCN; |
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599 m ["DEFS"] = DEFS; |
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600 |
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2689
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601 int nargin = args.length (); |
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602 |
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603 if (nargin == 1) |
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604 { |
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605 string arg = args(0).string_value (); |
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606 |
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607 if (! error_state) |
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608 retval = octave_value (m [arg.c_str ()]); |
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609 } |
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610 else if (nargin == 0) |
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611 retval = octave_value (m); |
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612 else |
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613 print_usage ("octave_config_info"); |
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614 |
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615 return retval; |
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2162
|
616 } |
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617 |
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1683
|
618 #if defined (__GNUG__) && defined (DEBUG_NEW_DELETE) |
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2806
|
619 |
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1683
|
620 int debug_new_delete = 0; |
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621 |
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622 typedef void (*vfp)(void); |
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623 extern vfp __new_handler; |
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624 |
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625 void * |
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626 __builtin_new (size_t sz) |
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627 { |
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628 void *p; |
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629 |
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630 /* malloc (0) is unpredictable; avoid it. */ |
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631 if (sz == 0) |
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632 sz = 1; |
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2800
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633 p = malloc (sz); |
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1683
|
634 while (p == 0) |
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635 { |
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636 (*__new_handler) (); |
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2800
|
637 p = malloc (sz); |
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1683
|
638 } |
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639 |
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640 if (debug_new_delete) |
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641 cout << "__builtin_new: " << p << endl; |
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642 |
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643 return p; |
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|
644 } |
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|
645 |
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646 void |
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|
647 __builtin_delete (void *ptr) |
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|
648 { |
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|
649 if (debug_new_delete) |
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|
650 cout << "__builtin_delete: " << ptr << endl; |
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651 |
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|
652 if (ptr) |
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653 free (ptr); |
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654 } |
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2806
|
655 |
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1683
|
656 #endif |
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657 |
|
2806
|
658 void |
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|
659 symbols_of_toplev (void) |
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|
660 { |
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3141
|
661 DEFCONST (argv, , |
|
3020
|
662 "the command line arguments this program was invoked with"); |
|
2806
|
663 |
|
3020
|
664 DEFCONST (program_invocation_name, |
|
3141
|
665 octave_env::get_program_invocation_name (), |
|
3020
|
666 "the full name of the current program or script, including the\n\ |
|
|
667 directory specification"); |
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|
668 |
|
3141
|
669 DEFCONST (program_name, octave_env::get_program_name (), |
|
3020
|
670 "the name of the current program or script"); |
|
2806
|
671 } |
|
|
672 |
|
1683
|
673 /* |
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|
674 ;;; Local Variables: *** |
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|
675 ;;; mode: C++ *** |
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|
676 ;;; End: *** |
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|
677 */ |
