Linux Cross Reference
Linux/scripts/lxdialog/lxdialog.c

   /*
    *  dialog - Display simple dialog boxes from shell scripts
    *
    *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
    *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
    *
    *  This program is free software; you can redistribute it and/or
    *  modify it under the terms of the GNU General Public License
    *  as published by the Free Software Foundation; either version 2
   *  of the License, or (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */
  
  #include "dialog.h"
  
  static void Usage (const char *name);
  
  typedef int (jumperFn) (const char *title, int argc, const char * const * argv);
  
  struct Mode {
      char *name;
      int argmin, argmax, argmod;
      jumperFn *jumper;
  };
  
  jumperFn j_menu, j_checklist, j_radiolist, j_yesno, j_textbox, j_inputbox;
  jumperFn j_msgbox, j_infobox;
  
  static struct Mode modes[] =
  {
      {"--menu", 9, 0, 3, j_menu},
      {"--checklist", 9, 0, 3, j_checklist},
      {"--radiolist", 9, 0, 3, j_radiolist},
      {"--yesno",    5,5,1, j_yesno},
      {"--textbox",  5,5,1, j_textbox},
      {"--inputbox", 5, 6, 1, j_inputbox},
      {"--msgbox", 5, 5, 1, j_msgbox},
      {"--infobox", 5, 5, 1, j_infobox},
      {NULL, 0, 0, 0, NULL}
  };
  
  static struct Mode *modePtr;
  
  #ifdef LOCALE
  #include <locale.h>
  #endif
  
  int
  main (int argc, const char * const * argv)
  {
      int offset = 0, clear_screen = 0, end_common_opts = 0, retval;
      const char *title = NULL;
  
  #ifdef LOCALE
      (void) setlocale (LC_ALL, "");
  #endif
  
  #ifdef TRACE
      trace(TRACE_CALLS|TRACE_UPDATE);
  #endif
      if (argc < 2) {
          Usage (argv[0]);
          exit (-1);
      }
  
      while (offset < argc - 1 && !end_common_opts) {     /* Common options */
          if (!strcmp (argv[offset + 1], "--title")) {
              if (argc - offset < 3 || title != NULL) {
                  Usage (argv[0]);
                  exit (-1);
              } else {
                  title = argv[offset + 2];
                  offset += 2;
              }
          } else if (!strcmp (argv[offset + 1], "--backtitle")) {
              if (backtitle != NULL) {
                  Usage (argv[0]);
                  exit (-1);
              } else {
                  backtitle = argv[offset + 2];
                  offset += 2;
              }
          } else if (!strcmp (argv[offset + 1], "--clear")) {
              if (clear_screen) { /* Hey, "--clear" can't appear twice! */
                  Usage (argv[0]);
                  exit (-1);
              } else if (argc == 2) {     /* we only want to clear the screen */
                  init_dialog ();
                  refresh ();     /* init_dialog() will clear the screen for us */
                  end_dialog ();
                  return 0;
             } else {
                 clear_screen = 1;
                 offset++;
             }
         } else                  /* no more common options */
             end_common_opts = 1;
     }
 
     if (argc - 1 == offset) {   /* no more options */
         Usage (argv[0]);
         exit (-1);
     }
     /* use a table to look for the requested mode, to avoid code duplication */
 
     for (modePtr = modes; modePtr->name; modePtr++)     /* look for the mode */
         if (!strcmp (argv[offset + 1], modePtr->name))
             break;
 
     if (!modePtr->name)
         Usage (argv[0]);
     if (argc - offset < modePtr->argmin)
         Usage (argv[0]);
     if (modePtr->argmax && argc - offset > modePtr->argmax)
         Usage (argv[0]);
 
 
 
     init_dialog ();
     retval = (*(modePtr->jumper)) (title, argc - offset, argv + offset);
 
     if (clear_screen) {         /* clear screen before exit */
         attr_clear (stdscr, LINES, COLS, screen_attr);
         refresh ();
     }
     end_dialog();
 
     exit (retval);
 }
 
 /*
  * Print program usage
  */
 static void
 Usage (const char *name)
 {
     fprintf (stderr, "\
 \ndialog, by Savio Lam (lam836@cs.cuhk.hk).\
 \n  patched by Stuart Herbert (S.Herbert@shef.ac.uk)\
 \n  modified/gutted for use as a Linux kernel config tool by \
 \n  William Roadcap (roadcapw@cfw.com)\
 \n\
 \n* Display dialog boxes from shell scripts *\
 \n\
 \nUsage: %s --clear\
 \n       %s [--title <title>] [--backtitle <backtitle>] --clear <Box options>\
 \n\
 \nBox options:\
 \n\
 \n  --menu      <text> <height> <width> <menu height> <tag1> <item1>...\
 \n  --checklist <text> <height> <width> <list height> <tag1> <item1> <status1>...\
 \n  --radiolist <text> <height> <width> <list height> <tag1> <item1> <status1>...\
 \n  --textbox   <file> <height> <width>\
 \n  --inputbox  <text> <height> <width> [<init>]\
 \n  --yesno     <text> <height> <width>\
 \n", name, name);
     exit (-1);
 }
 
 /*
  * These are the program jumpers
  */
 
 int
 j_menu (const char *t, int ac, const char * const * av)
 {
     return dialog_menu (t, av[2], atoi (av[3]), atoi (av[4]),
                         atoi (av[5]), av[6], (ac - 6) / 2, av + 7);
 }
 
 int
 j_checklist (const char *t, int ac, const char * const * av)
 {
     return dialog_checklist (t, av[2], atoi (av[3]), atoi (av[4]),
         atoi (av[5]), (ac - 6) / 3, av + 6, FLAG_CHECK);
 }
 
 int
 j_radiolist (const char *t, int ac, const char * const * av)
 {
     return dialog_checklist (t, av[2], atoi (av[3]), atoi (av[4]),
         atoi (av[5]), (ac - 6) / 3, av + 6, FLAG_RADIO);
 }
 
 int
 j_textbox (const char *t, int ac, const char * const * av)
 {
     return dialog_textbox (t, av[2], atoi (av[3]), atoi (av[4]));
 }
 
 int
 j_yesno (const char *t, int ac, const char * const * av)
 {
     return dialog_yesno (t, av[2], atoi (av[3]), atoi (av[4]));
 }
 
 int
 j_inputbox (const char *t, int ac, const char * const * av)
 {
     int ret = dialog_inputbox (t, av[2], atoi (av[3]), atoi (av[4]),
                             ac == 6 ? av[5] : (char *) NULL);
     if (ret == 0)
         fprintf(stderr, dialog_input_result);
     return ret;
 }
 
 int
 j_msgbox (const char *t, int ac, const char * const * av)
 {
     return dialog_msgbox (t, av[2], atoi (av[3]), atoi (av[4]), 1);
 }
 
 int
 j_infobox (const char *t, int ac, const char * const * av)
 {
     return dialog_msgbox (t, av[2], atoi (av[3]), atoi (av[4]), 0);
 }