display dialog boxes from shell scripts
whiptail [ --title title ] [ --backtitle backtitle ] [ --clear ] [ --default -item string ] [ --defaultno ] [ --fb ] [ --nocancel ] [ --yes -button text ] [ --no -button text ] [ --ok -button text ] [ --cancel -button text ] [ --noitem [ ] --output -fd fd ] [ --separate -output ] [ --scrolltext ] [ --topleft ] box-options
whiptail is a program that will let you present a variety of questions or display messages using dialog boxes from a shell script. Currently, these types of dialog boxes are implemented:
yes/nobox,menubox,inputbox, messagebox,textbox,infobox, checklistbox,radiolistboxgaugebox, and passwordbox.
--clear The screen will be cleared to the screen attributeon exit. This doesn't work in an xterm (and descendants) if alternate screen switching is enabled, because in that case slang writes to (and clears) an alternate screen.
--defaultno The dialog box will open with the cursor over the Nobutton.
--default-itemstring Set the default item in a menu box. Normally the first item in the box is the default.
--fb , --fullbuttons Use full buttons. (By default, whiptail uses compact buttons).
--nocancel The dialog box won't have a Cancelbutton.
--yes-buttontext Set the text of the Yesbutton.
--no-buttontext Set the text of the Nobutton.
--ok-buttontext Set the text of the Okbutton.
--cancel-buttontext Set the text of the Cancelbutton.
--noitem The menu, checklist and radiolist widgets will display tags only, not the item strings. The menu widget still needs some items specified, but checklist and radiolist expect only tag and status.
--notags Don't display tags in the menu, checklist and radiolist widgets.
--separate-output For checklist widgets, output result one line at a time, with no quoting. This facilitates parsing by another program.
--output-fdfd Direct output to the given file descriptor. Most whiptail scripts write to standard error, but error messages may also be written there, depending on your script.
--titletitle Specifies a title string to be displayed at the top of the dialog box.
--backtitlebacktitle Specifies a backtitle string to be displayed on the backdrop, at the top of the screen.
--scrolltext Force the display of a vertical scrollbar.
--topleft Put window in top-left corner.
-h , --help Print a help message and exit.
-v , --version Print version information and exit.
--yesnotext height width Ayes/nodialog box of size height rows by width columns will be displayed. The string specified by text is displayed inside the dialog box. If this string is too long to be fit in one line, it will be automatically divided into multiple lines at appropriate places. The text string may also contain the sub-string " \ n" or newline characters ` \ n' to control line breaking explicitly. This dialog box is useful for asking questions that require the user to answer either yes or no. The dialog box has aYesbutton and aNo button, in which the user can switch between by pressing the TABkey.
--msgboxtext height width Amessagebox is very similar to ayes/nobox. The only difference between a message box and a yes/no box is that a message box has only a single OK button. You can use this dialog box to display any message you like. After reading the message, the user can press the ENTER key so that whiptail will exit and the calling shell script can continue its operation.
--infoboxtext height width Aninfobox is basically amessagebox. However, in this case, whiptail will exit immediately after displaying the message to the user. The screen is not cleared when whiptail exits, so that the message will remain on the screen until the calling shell script clears it later. This is useful when you want to inform the user that some operations are carrying on that may require some time to finish.
--inputboxtext height width [init] Aninputbox is useful when you want to ask questions that require the user to input a string as the answer. If init is supplied it is used to initialize the input string. When inputing the string, the BACKSPACE key can be used to correct typing errors. If the input string is longer than the width of the dialog box, the input field will be scrolled. On exit, the input string will be printed on stderr.
--passwordboxtext height width [init] Apasswordbox is similar to an input box, except the text the user enters is not displayed. This is useful when prompting for passwords or other sensitive information. Be aware that if anything is passed in "init", it will be visible in the system's process table to casual snoopers. Also, it is very confusing to the user to provide them with a default password they cannot see. For these reasons, using "init" is highly discouraged.
--textboxfile height width Atextbox lets you display the contents of a text file in a dialog box. It is like a simple text file viewer. The user can move through the file by using the UP/DOWN,PGUP/PGDN andHOME/ENDkeys available on most keyboards. If the lines are too long to be displayed in the box, the LEFT/RIGHT keys can be used to scroll the text region horizontally. For more convenience, forward and backward searching functions are also provided.
" --menu textheight width menu-height [ tagitem ] ..." As its name suggests, a menu box is a dialog box that can be used to present a list of choices in the form of a menu for the user to choose. Each menu entry consists of a tagstring and anitemstring. The tag gives the entry a name to distinguish it from the other entries in the menu. The item is a short description of the option that the entry represents. The user can move between the menu entries by pressing the UP/DOWN keys, the first letter of the tag as a hot-key. There are menu-height entries displayed in the menu at one time, but the menu will be scrolled if there are more entries than that. When whiptail exits, the tag of the chosen menu entry will be printed on stderr.
" --checklist textheight width list-height [ tagitem status ] ..." Achecklistbox is similar to amenubox in that there are multiple entries presented in the form of a menu. You can select and deselect items using the SPACE key. The initial on/off state of each entry is specified by status. On exit, a list of the tag strings of those entries that are turned on will be printed on stderr.
" --radiolist textheight width list-height [ tagitem status ] ..." Aradiolistbox is similar to amenubox. The only difference is that you can indicate which entry is currently selected, by setting its statustoon.
" --gauge textheight width percent " Agauge"boxdisplaysameteralongthebottomofthebox. The meter indicates a percentage. New percentages are read from standard input, one integer per line. The meter is updated to reflect each new percentage. If stdin is XXX, the first following line is a percentage and subsequent lines up to another XXX are used for a new prompt. The gauge exits when EOF is reached on stdin.
whiptail interprets arguments starting with a dash " -" as being arguments. To avoid this, and start some text in, for example, a menubox item, with a dash, whiptail honours the getopt convention of accepting the special argument " --" which means that all following arguments with dashes are to be treated verbatim and not parsed as options.
Exit status is 0 if whiptailis exited by pressing theYesorOK button, and 1 if the NoorCancel button is pressed. Otherwise, if errors occur inside whiptail or whiptail is exited by pressing the ESC key, the exit status is -1.
Based on the man page for dialog(1) by:
Savio Lam (firstname.lastname@example.org) - version 0.3
Stuart Herbert (S.Herbert@sheffield.ac.uk) - patch for version 0.4
Modifications for whiptail by:
Enrique Zanardi (email@example.com)
Alastair McKinstry (firstname.lastname@example.org)