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whiptail.c

/* a reasonable dialog */

#include <fcntl.h>
#include <popt.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

#include "dialogboxes.h"
#include "newt.h"

enum mode { MODE_NONE, MODE_INFOBOX, MODE_MSGBOX, MODE_YESNO, MODE_CHECKLIST,
            MODE_INPUTBOX, MODE_RADIOLIST, MODE_MENU, MODE_GAUGE };

#define OPT_MSGBOX            1000
#define OPT_CHECKLIST         1001
#define OPT_YESNO             1002
#define OPT_INPUTBOX          1003
#define OPT_FULLBUTTONS       1004
#define OPT_MENU        1005
#define OPT_RADIOLIST         1006
#define OPT_GAUGE       1007
#define OPT_INFOBOX           1008

static void usage(void) {
    fprintf(stderr, "whiptail: bad parameters (see man dialog(1) for details)\n");
    exit(1);
}

int main(int argc, const char ** argv) {
    enum mode mode = MODE_NONE;
    poptContext optCon;
    int arg;
    const char * optArg;
    const char * text;
    const char * nextArg;
    char * end;
    int height;
    int width;
    int fd = -1;
    int needSpace = 0;
    int noCancel = 0;
    int noItem = 0;
    int clear = 0;
    int scrollText = 0;
    int rc = 1;
    int flags = 0;
    int defaultNo = 0;
    int separateOutput = 0;
    const char * result;
    const char ** selections, ** next;
    char * title = NULL;
    char * backtitle = NULL;
    struct poptOption optionsTable[] = {
          { "backtitle", '\0', POPT_ARG_STRING, &backtitle, 0 },
          { "checklist", '\0', 0, 0, OPT_CHECKLIST },
          { "clear", '\0', 0, &clear, 0 },
          { "defaultno", '\0', 0, &defaultNo, 0 },
          { "inputbox", '\0', 0, 0, OPT_INPUTBOX },
          { "fb", '\0', 0, 0, OPT_FULLBUTTONS },
          { "fullbuttons", '\0', 0, 0, OPT_FULLBUTTONS },
          { "gauge", '\0', 0, 0, OPT_GAUGE },
          { "infobox", '\0', 0, 0, OPT_INFOBOX },
          { "menu", '\0', 0, 0, OPT_MENU },
          { "msgbox", '\0', 0, 0, OPT_MSGBOX },
          { "nocancel", '\0', 0, &noCancel, 0 },
          { "noitem", '\0', 0, &noItem, 0 },
          { "radiolist", '\0', 0, 0, OPT_RADIOLIST },
          { "scrolltext", '\0', 0, &scrollText, 0 },
          { "separate-output", '\0', 0, &separateOutput, 0 },
          { "title", '\0', POPT_ARG_STRING, &title, 0 },
          { "yesno", '\0', 0, 0, OPT_YESNO },
          { 0, 0, 0, 0, 0 } 
    };
    
    optCon = poptGetContext("whiptail", argc, argv, optionsTable, 0);

    while ((arg = poptGetNextOpt(optCon)) > 0) {
      optArg = poptGetOptArg(optCon);

      switch (arg) {
        case OPT_INFOBOX:
          if (mode != MODE_NONE) usage();
          mode = MODE_INFOBOX;
          break;

        case OPT_MENU:
          if (mode != MODE_NONE) usage();
          mode = MODE_MENU;
          break;

        case OPT_MSGBOX:
          if (mode != MODE_NONE) usage();
          mode = MODE_MSGBOX;
          break;

        case OPT_RADIOLIST:
          if (mode != MODE_NONE) usage();
          mode = MODE_RADIOLIST;
          break;

        case OPT_CHECKLIST:
          if (mode != MODE_NONE) usage();
          mode = MODE_CHECKLIST;
          break;

        case OPT_FULLBUTTONS:
          useFullButtons(1);
          break;

        case OPT_YESNO:
          if (mode != MODE_NONE) usage();
          mode = MODE_YESNO;
          break;

        case OPT_GAUGE:
          if (mode != MODE_NONE) usage();
          mode = MODE_GAUGE;
          break;

        case OPT_INPUTBOX:
          if (mode != MODE_NONE) usage();
          mode = MODE_INPUTBOX;
          break;
      }
    }
    
    if (arg < -1) {
      fprintf(stderr, "%s: %s\n", 
            poptBadOption(optCon, POPT_BADOPTION_NOALIAS), 
            poptStrerror(arg));
      exit(1);
    }

    if (mode == MODE_NONE) usage();

    if (!(text = poptGetArg(optCon))) usage();

    if (!(nextArg = poptGetArg(optCon))) usage();
    height = strtoul(nextArg, &end, 10);
    if (*end) usage();

    if (!(nextArg = poptGetArg(optCon))) usage();
    width = strtoul(nextArg, &end, 10);
    if (*end) usage();

    if (mode == MODE_GAUGE) {
      fd = dup(0);
      close(0);
      if (open("/dev/tty", O_RDWR) != 0) perror("open /dev/tty");
    }

    newtInit();
    newtCls();
    width -= 2;
    height -= 2;
    newtOpenWindow((80 - width) / 2, (24 - height) / 2, width, height, title);

    if (backtitle)
      newtDrawRootText(0, 0, backtitle);

    if (noCancel) flags |= FLAG_NOCANCEL;
    if (noItem) flags |= FLAG_NOITEM;
    if (scrollText) flags |= FLAG_SCROLL_TEXT;
    if (defaultNo) flags |= FLAG_DEFAULT_NO;

    switch (mode) {
      case MODE_MSGBOX:
      rc = messageBox(text, height, width, MSGBOX_MSG, flags);
      break;

      case MODE_INFOBOX:
      rc = messageBox(text, height, width, MSGBOX_INFO, flags);
      break;

      case MODE_YESNO:
      rc = messageBox(text, height, width, MSGBOX_YESNO, flags);
      break;

      case MODE_INPUTBOX:
      rc = inputBox(text, height, width, optCon, flags, &result);
      if (!rc) fprintf(stderr, "%s", result);
      break;

      case MODE_MENU:
      rc = listBox(text, height, width, optCon, flags, &result);
      if (!rc) fprintf(stderr, "%s", result);
      break;

      case MODE_RADIOLIST:
      rc = checkList(text, height, width, optCon, 1, flags, &selections);
      if (!rc) {
          fprintf(stderr, "%s", selections[0]);
          free(selections);
      }
      break;

      case MODE_CHECKLIST:
      rc = checkList(text, height, width, optCon, 0, flags, &selections);

      if (!rc) {
          for (next = selections; *next; next++) {
            if (!separateOutput) {
                if (needSpace) putc(' ', stderr);
                fprintf(stderr, "\"%s\"", *next);
                needSpace = 1;
            } else {
                fprintf(stderr, "%s\n", *next);
            }
          }

          free(selections);
      }
      break;

      case MODE_GAUGE:
      rc = gauge(text, height, width, optCon, fd, flags);
      break;

      default:
      usage();
    }

    if (rc == -1) usage();

    if (clear)
      newtPopWindow();
    newtFinished();

    return rc;
}

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