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/no box, menu box, input box,
message box, text box, info box,
checklist box, radiolist box gauge box, and
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.
uses compact buttons).
write to standard error, but error messages may also be
written there, depending on your script.
string to be displayed at the top of the dialog box.
string to be displayed on the backdrop, at the top of the screen.
columns will be displayed. The string specified by
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
string may also contain the sub-string
or newline characters
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 a Yes button and a No
button, in which the user can switch between by pressing the
The only difference between a
box and a
box is that a
box has only a single
button. You can use this dialog box to display any message you like.
After reading the message, the user can press the
key so that
will exit and the calling shell script can continue its operation.
However, in this case,
will exit immediately after displaying the message to the user. The
screen is not cleared when
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.
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
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
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.
dialog box. It is like a simple text file viewer. The user can move
through the file by using the
and HOME/END keys available on most keyboards.
If the lines are too long to be displayed in the box, the
keys can be used to scroll the text region horizontally. For more
convenience, forward and backward searching functions are also provided.
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
tag string and an item string. The
gives the entry a name to distinguish it from the other entries in the
is a short description of the option that the entry represents. The
user can move between the menu entries by pressing the
keys, the first letter of the
as a hot-key. There are
entries displayed in the menu at one time, but the menu will be
scrolled if there are more entries than that. When
of the chosen menu entry will be printed on
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
On exit, a list of the
strings of those entries that are turned on will be printed on
that you can indicate which entry is currently selected, by setting its
status to on.
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, then 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
whiptail is exited by pressing the Yes or OK
button, and 1 if the
No or Cancel
button is pressed. Otherwise, if errors occur inside
is exited by pressing the
Based on the man page for dialog(1) by:
Savio Lam ([email protected]) – version 0.3
Stuart Herbert ([email protected]) – patch for version 0.4
Modifications for whiptail by:
Enrique Zanardi ([email protected])
Alastair McKinstry ([email protected])