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 #include "ui/terminal/terminal.h"
  55
  56 #include "gl/fatal-signal.h"
  57 #include "gl/progname.h"
  58 #include "gl/relocatable.h"
  59
  60 #include "gettext.h"
  61 #define _(msgid) gettext (msgid)
  62
  63 static struct session *the_session;
  64
  65 static void add_syntax_reader (struct lexer *, const char *file_name,
  66                                const char *encoding, enum lex_syntax_mode);
  67 static void bug_handler(int sig);
  68 static void fpu_init (void);
  69 static void output_msg (const struct msg *, void *);
  70
  71 /* Program entry point. */
  72 int
  73 main (int argc, char **argv)
  74 {
  75   struct terminal_opts *terminal_opts;
  76   struct argv_parser *parser;
  77   enum lex_syntax_mode syntax_mode;
  78   char *syntax_encoding;
  79   bool process_statrc;
  80   struct lexer *lexer;
  81
  82   set_program_name (argv[0]);
  83
  84   signal (SIGABRT, bug_handler);
  85   signal (SIGSEGV, bug_handler);
  86   signal (SIGFPE, bug_handler);
  87
  88   i18n_init ();
  89   fpu_init ();
  90   gsl_set_error_handler_off ();
  91
  92   output_engine_push ();
  93   fh_init ();
  94   settings_init ();
  95   terminal_check_size ();
  96   random_init ();
  97
  98   lexer = lex_create ();
  99   the_session = session_create (NULL);
 100   dataset_create (the_session, "");
 101
 102   parser = argv_parser_create ();
 103   terminal_opts = terminal_opts_init (parser, &syntax_mode, &process_statrc,
 104                                       &syntax_encoding);
 105   source_init_register_argv_parser (parser);
 106   if (!argv_parser_run (parser, argc, argv))
 107     exit (EXIT_FAILURE);
 108   terminal_opts_done (terminal_opts, argc, argv);
 109   argv_parser_destroy (parser);
 110
 111   msg_set_handler (output_msg, lexer);
 112   session_set_default_syntax_encoding (the_session, syntax_encoding);
 113
 114   /* Add syntax files to source stream. */
 115   if (process_statrc)
 116     {
 117       char *rc = include_path_search ("rc");
 118       if (rc != NULL)
 119         {
 120           add_syntax_reader (lexer, rc, "Auto", LEX_SYNTAX_AUTO);
 121           free (rc);
 122         }
 123     }
 124   if (optind < argc)
 125     {
 126       int i;
 127
 128       for (i = optind; i < argc; i++)
 129         add_syntax_reader (lexer, argv[i], syntax_encoding, syntax_mode);
 130     }
 131   else
 132     add_syntax_reader (lexer, "-", syntax_encoding, syntax_mode);
 133
 134   /* Parse and execute syntax. */
 135   lex_get (lexer);
 136   for (;;)
 137     {
 138       int result = cmd_parse (lexer, session_active_dataset (the_session));
 139
 140       if (result == CMD_EOF || result == CMD_FINISH)
 141         break;
 142       else if (cmd_result_is_failure (result) && lex_token (lexer) != T_STOP)
 143         {
 144           if (lex_get_error_mode (lexer) == LEX_ERROR_STOP)
 145             {
 146               msg (MW, _("Error encountered while ERROR=STOP is effective."));
 147               lex_discard_noninteractive (lexer);
 148             }
 149           else if (result == CMD_CASCADING_FAILURE
 150                    && lex_get_error_mode (lexer) != LEX_ERROR_TERMINAL)
 151             {
 152               msg (SE, _("Stopping syntax file processing here to avoid "
 153                          "a cascade of dependent command failures."));
 154               lex_discard_noninteractive (lexer);
 155             }
 156         }
 157
 158       if (msg_ui_too_many_errors ())
 159         lex_discard_noninteractive (lexer);
 160     }
 161
 162
 163   session_destroy (the_session);
 164
 165   random_done ();
 166   settings_done ();
 167   fh_done ();
 168   lex_destroy (lexer);
 169   output_engine_pop ();
 170   i18n_done ();
 171
 172   return msg_ui_any_errors ();
 173 }
 174 \f
 175 static void
 176 fpu_init (void)
 177 {
 178 #if HAVE_FEHOLDEXCEPT
 179   fenv_t foo;
 180   feholdexcept (&foo);
 181 #elif HAVE___SETFPUCW && defined(_FPU_IEEE)
 182   __setfpucw (_FPU_IEEE);
 183 #elif HAVE_FPSETMASK
 184   fpsetmask (0);
 185 #endif
 186 }
 187
 188 /* If a segfault happens, issue a message to that effect and halt */
 189 static void
 190 bug_handler(int sig)
 191 {
 192   /* Reset SIG to its default handling so that if it happens again we won't
 193      recurse. */
 194   signal (sig, SIG_DFL);
 195
 196   switch (sig)
 197     {
 198     case SIGABRT:
 199       request_bug_report("Assertion Failure/Abort");
 200       break;
 201     case SIGFPE:
 202       request_bug_report("Floating Point Exception");
 203       break;
 204     case SIGSEGV:
 205       request_bug_report("Segmentation Violation");
 206       break;
 207     default:
 208       request_bug_report("Unknown");
 209       break;
 210     }
 211
 212   /* Re-raise the signal so that we terminate with the correct status. */
 213   raise (sig);
 214 }
 215
 216 static void
 217 output_msg (const struct msg *m_, void *lexer_)
 218 {
 219   struct lexer *lexer = lexer_;
 220   struct msg m = *m_;
 221
 222   if (m.file_name == NULL)
 223     {
 224       m.file_name = CONST_CAST (char *, lex_get_file_name (lexer));
 225       m.first_line = lex_get_first_line_number (lexer, 0);
 226       m.last_line = lex_get_last_line_number (lexer, 0);
 227     }
 228
 229   message_item_submit (message_item_create (&m));
 230 }
 231
 232 static void
 233 add_syntax_reader (struct lexer *lexer, const char *file_name,
 234                    const char *encoding, enum lex_syntax_mode syntax_mode)
 235 {
 236   struct lex_reader *reader;
 237
 238   reader = (!strcmp (file_name, "-") && isatty (STDIN_FILENO)
 239             ? terminal_reader_create ()
 240             : lex_reader_for_file (file_name, encoding, syntax_mode,
 241                                    LEX_ERROR_CONTINUE));
 242
 243   if (reader)
 244     lex_append (lexer, reader);
 245 }