Check that enough space for newline and 0-byte is left in line.
This fixes a buffer overflow on specific completion results.
Reported-By: Leona Maroni <dev@leona.is>
iwctl quit (running quit non-interactively) isn't a useful command,
but it shouldn't segfault. Let's avoid calling readline functions if
we haven't initialized readline in this run.
In nearly all cases the auto-line breaks can be on spaces in the
string. The only exception (so far) is DPP which displays a very
long URI without any spaces. When this is displayed a single
character was lost on each break. This was due to the current line
being NULL terminated prior to the next line string being returned.
To handle both cases the next line is copied prior to terminating
the current line. The offsets were modified slightly so the line
will be broken *after* the space, not on the space. This leaves
the space at the end of the current line which is invisible to the
user but allows the no-space case to also work without loss of
the last character (since that last character is where the space
normally would be).
Each color escape is tracked and the new_width is adjusted
accordingly. But if the color escape comes after a space which breaks
the line, the adjusted width ends up being too long since that escape
sequence isn't appearing on the current line. This causes the next
column to be shifted over.
The old 'max' parameter was being used both as an input and output
parameter which was confusing. Instead have next_line take the
column width as input, and output a new width which includes any
color escapes and wide characters.
In theory any input to this function should have valid utf-8 but
just in case the strings should be validated. This removes the
need to check the return of l_utf8_get_codepoint which is useful
since there is no graceful failure path at this point.
The utf-8 bytes were being counted as normal ascii so the
width maximum was not being increased to include
non-printable bytes like it is for color escape sequences.
This lead to the row not printing enough characters which
effected the text further down the line.
Fix this by increasing 'max' when non-codepoint utf-8
characters are found.
The existing color code escape sequences required the user to set the
color, write the string, then unset with COLOR_OFF. Instead the macros
can be made to take the string itself and automatically terminate the
color with COLOR_OFF. This makes for much more concise strings.
There was no easy to use API for printing the contents of a table, and
was left up to the caller to handle manually. This adds display_table_row
which makes displaying tables much easier, including automatic support
for line truncation and continuation on the next line.
Lines which are too long will be truncated and displayed on the next
line while also taking into account any colored output. This works with any
number of columns.
This removes the need for the module to play games with encoding newlines
and tabs to make the output look nice.
As a start, this functionality was added to the command display.
This fixes up a previous commit which breaks iwctl. The
check was added to satisfy static analysis but it ended
up preventing iwctl from starting. In this case mkdir
can fail (e.g. if the directory already exists) and only
if it fails should the history be read. Otherwise a
successful mkdir return indicates the history folder is
new and there is no reason to try reading it.
This takes a Dbus iterator which has been entered into a
dictionary and prints out each key and value. It requires
a mapping which maps keys to types and units. For simple
cases the mapping will consist of a dbus type character
and a units string, e.g. dBm, Kbit/s etc. For more complex
printing which requires processing the value the 'units'
void* cant be set to a function which can be custom written
to handle the value.
Readline uses the characters \001 and \002 to mark the start and end
of zero-length character sequnces in the prompt before prompt
expansion. Without these characters the input point can become offset
from the visual end of the prompt when performing some actions.
The display refresh is automatically enabled or disabled depending on
the width of the window. This allows to avoid the incorrect display on
refresh for the small windows.
Instead of calling display(""), explicitly use the sequence of
commands to force readline to properly update its internal state
and re-display the prompt.
Keep cursor's position consistent when passphrase is reaching
its maximum by adding characters in the middle of the string
The use case is very rare as not many people will attempt to
modify the masked passphrase from the middle.
Previously, CTRL+D used to cause termination of the client. Now, the
command will cancel the agent’s prompts in agent mod. In regular mode
the behavior is unchanged.
Due to the changed IO behavior, pasting of the secrets
into the agent prompt became impossible. The reimplemented
logic allows to add (paste) an arbitrary number of characters
into a desired position of a secret string up to its max lengths.
The deletion has also been reworked to accommodate the new behavior.
Entering 23 characters at a prompt resulted in 9 extra characters being
added to the line. At this point, you would only be abel to backspace
until the 9th character.
It seems that claling both rl_replace_line("", 0) and rl_redisplay()
before rl_replace_line(masked_input.mask, 0) causes this to happen. Both
calls are redundant anyways as iwctl functions exactly the same without
them (plus no more bug).
We'd add the new command propmpt to history if it was different from
what current_history() returned which may not be the last command
executed, so we'd possibly add multiple identical commands to history
and skip some that were new. Instead compare against
history_get(last index).
Also remove an always-true part of the condition on the next line.
