src/ui/terminal/main.c

   1 /* PSPP - a program for statistical analysis.
   2    Copyright (C) 1997-2000, 2006-2007, 2009-2014 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  16
  17 #include <config.h>
  18
  19 #include <signal.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #if HAVE_FPU_CONTROL_H
  23 #include <fpu_control.h>
  24 #endif
  25 #if HAVE_FENV_H
  26 #include <fenv.h>
  27 #endif
  28 #if HAVE_IEEEFP_H
  29 #include <ieeefp.h>
  30 #endif
  31 #include <unistd.h>
  32
  33 #include "data/dataset.h"
  34 #include "data/dictionary.h"
  35 #include "data/file-handle-def.h"
  36 #include "data/session.h"
  37 #include "data/settings.h"
  38 #include "data/variable.h"
  39 #include "gsl/gsl_errno.h"
  40 #include "language/command.h"
  41 #include "language/lexer/lexer.h"
  42 #include "language/lexer/include-path.h"
  43 #include "libpspp/argv-parser.h"
  44 #include "libpspp/compiler.h"
  45 #include "libpspp/i18n.h"
  46 #include "libpspp/message.h"
  47 #include "libpspp/version.h"
  48 #include "math/random.h"
  49 #include "output/driver.h"
  50 #include "output/message-item.h"
  51 #include "ui/source-init-opts.h"
  52 #include "ui/terminal/terminal-opts.h"
  53 #include "ui/terminal/terminal-reader.h"
  54
  55 #include "gl/fatal-signal.h"
  56 #include "gl/progname.h"
  57 #include "gl/relocatable.h"
  58
  59 #include "gettext.h"
  60 #define _(msgid) gettext (msgid)
  61
  62 static struct session *the_session;
  63
  64 static void add_syntax_reader (struct lexer *, const char *file_name,
  65                                const char *encoding, enum lex_syntax_mode);
  66 static void bug_handler(int sig);
  67 static void fpu_init (void);
  68 static void output_msg (const struct msg *, void *);
  69
  70 /* Program entry point. */
  71 int
  72 main (int argc, char **argv)
  73 {
  74   struct terminal_opts *terminal_opts;
  75   struct argv_parser *parser;
  76   enum lex_syntax_mode syntax_mode;
  77   char *syntax_encoding;
  78   bool process_statrc;
  79   struct lexer *lexer;
  80
  81   set_program_name (argv[0]);
  82
  83   prepare_fatal_error_message ();
  84   prepare_diagnostic_information ();
  85
  86   signal (SIGABRT, bug_handler);
  87   signal (SIGSEGV, bug_handler);
  88   signal (SIGFPE, bug_handler);
  89
  90   i18n_init ();
  91   fpu_init ();
  92   gsl_set_error_handler_off ();
  93
  94   output_engine_push ();
  95   fh_init ();
  96   settings_init ();
  97   random_init ();
  98
  99   lexer = lex_create ();
 100   the_session = session_create (NULL);
 101   dataset_create (the_session, "");
 102
 103   parser = argv_parser_create ();
 104   terminal_opts = terminal_opts_init (parser, &syntax_mode, &process_statrc,
 105                                       &syntax_encoding);
 106   source_init_register_argv_parser (parser);
 107   if (!argv_parser_run (parser, argc, argv))
 108     exit (EXIT_FAILURE);
 109   terminal_opts_done (terminal_opts, argc, argv);
 110   argv_parser_destroy (parser);
 111
 112   msg_set_handler (output_msg, lexer);
 113   session_set_default_syntax_encoding (the_session, syntax_encoding);
 114
 115   /* Add syntax files to source stream. */
 116   if (process_statrc)
 117     {
 118       char *rc = include_path_search ("rc");
 119       if (rc != NULL)
 120         {
 121           add_syntax_reader (lexer, rc, "Auto", LEX_SYNTAX_AUTO);
 122           free (rc);
 123         }
 124     }
 125   if (optind < argc)
 126     {
 127       int i;
 128
 129       for (i = optind; i < argc; i++)
 130         add_syntax_reader (lexer, argv[i], syntax_encoding, syntax_mode);
 131     }
 132   else
 133     add_syntax_reader (lexer, "-", syntax_encoding, syntax_mode);
 134
 135   /* Parse and execute syntax. */
 136   lex_get (lexer);
 137   for (;;)
 138     {
 139       int result = cmd_parse (lexer, session_active_dataset (the_session));
 140
 141       if (result == CMD_EOF || result == CMD_FINISH)
 142         break;
 143       else if (cmd_result_is_failure (result) && lex_token (lexer) != T_STOP)
 144         {
 145           if (lex_get_error_mode (lexer) == LEX_ERROR_STOP)
 146             {
 147               msg (MW, _("Error encountered while ERROR=STOP is effective."));
 148               lex_discard_noninteractive (lexer);
 149             }
 150           else if (result == CMD_CASCADING_FAILURE
 151                    && lex_get_error_mode (lexer) != LEX_ERROR_TERMINAL)
 152             {
 153               msg (SE, _("Stopping syntax file processing here to avoid "
 154                          "a cascade of dependent command failures."));
 155               lex_discard_noninteractive (lexer);
 156             }
 157         }
 158
 159       if (msg_ui_too_many_errors ())
 160         lex_discard_noninteractive (lexer);
 161     }
 162
 163
 164   output_engine_pop ();
 165   session_destroy (the_session);
 166
 167   random_done ();
 168   settings_done ();
 169   fh_done ();
 170   lex_destroy (lexer);
 171   i18n_done ();
 172
 173   return msg_ui_any_errors ();
 174 }
 175 \f
 176 static void
 177 fpu_init (void)
 178 {
 179 #if HAVE_FEHOLDEXCEPT
 180   fenv_t foo;
 181   feholdexcept (&foo);
 182 #elif HAVE___SETFPUCW && defined(_FPU_IEEE)
 183   __setfpucw (_FPU_IEEE);
 184 #elif HAVE_FPSETMASK
 185   fpsetmask (0);
 186 #endif
 187 }
 188
 189 /* If a segfault happens, issue a message to that effect and halt */
 190 static void
 191 bug_handler(int sig)
 192 {
 193   /* Reset SIG to its default handling so that if it happens again we won't
 194      recurse. */
 195   signal (sig, SIG_DFL);
 196
 197   switch (sig)
 198     {
 199     case SIGABRT:
 200       request_bug_report("Assertion Failure/Abort");
 201       break;
 202     case SIGFPE:
 203       request_bug_report("Floating Point Exception");
 204       break;
 205     case SIGSEGV:
 206       request_bug_report("Segmentation Violation");
 207       break;
 208     default:
 209       request_bug_report("Unknown");
 210       break;
 211     }
 212
 213   /* Re-raise the signal so that we terminate with the correct status. */
 214   raise (sig);
 215 }
 216
 217 static void
 218 output_msg (const struct msg *m_, void *lexer_)
 219 {
 220   struct lexer *lexer = lexer_;
 221   struct msg m = *m_;
 222
 223   if (m.file_name == NULL)
 224     {
 225       m.file_name = CONST_CAST (char *, lex_get_file_name (lexer));
 226       m.first_line = lex_get_first_line_number (lexer, 0);
 227       m.last_line = lex_get_last_line_number (lexer, 0);
 228     }
 229
 230   m.command_name = output_get_uppercase_command_name ();
 231
 232   message_item_submit (message_item_create (&m));
 233
 234   free (m.command_name);
 235 }
 236
 237 static void
 238 add_syntax_reader (struct lexer *lexer, const char *file_name,
 239                    const char *encoding, enum lex_syntax_mode syntax_mode)
 240 {
 241   struct lex_reader *reader;
 242
 243   reader = (!strcmp (file_name, "-") && isatty (STDIN_FILENO)
 244             ? terminal_reader_create ()
 245             : lex_reader_for_file (file_name, encoding, syntax_mode,
 246                                    LEX_ERROR_CONTINUE));
 247
 248   if (reader)
 249     lex_append (lexer, reader);
 250 }