---
-Why does st not handle utmp entries?
+## Why does st not handle utmp entries?
-Use the excellent tool of utmp[0] for this task.
+Use the excellent tool of [utmp](http://git.suckless.org/utmp/) for this task.
-[0] http://git.suckless.org/utmp/
---
-Some _random program_ complains that st is unknown/not
-recognised/unsupported/whatever!
+## Some _random program_ complains that st is unknown/not recognised/unsupported/whatever!
It means that st doesn’t have any terminfo entry on your system. Chances are
-you did not make install. If you just want to test it without installing it,
-you can manualy run tic -s st.info in st dir. It will compile st.info into a
-fully working local terminfo description. You can delete it when you’re done.
---
-Nothing works, and nothing is said about an unknown terminal!
+you did not `make install`. If you just want to test it without installing it,
+you can manualy run `tic -s st.info`.
+
+## Nothing works, and nothing is said about an unknown terminal!
* Some programs just assume they’re running in xterm i.e. they don’t rely on
terminfo. What you see is the current state of the “xterm compliance”.
* Some programs don’t complain about the lacking st description and default to
another terminal. In that case see the question about terminfo.
---
-I get some weird glitches/visual bug on _random program_!
-
-Try lauching it with a different TERM: $ TERM=xterm myapp. toe(1) will give
-you a list of available terminals, but you’ll most likely switch between
-xterm, st or st-256color. The default value for TERM can be changed in
-config.h (TNAME).
---
-How do I scroll back up?
-
-Invoke st with a screen multiplexer like GNU screen[0] or tmux[1].
-st -e screen works better for text reflowing. To enter screen’s scroll
-back mode aka “copy mode”, it’s C-a ESC. You probably want defscrollback
-10000 in your ~/.screenrc too.
-
-[0] http://en.wikipedia.org/wiki/GNU_Screen
-[1] http://en.wikipedia.org/wiki/Tmux
---
-Why doesn't the Del key work in some programs?
+
+## I get some weird glitches/visual bug on _random program_!
+
+Try launching it with a different TERM: $ TERM=xterm myapp. toe(1) will give
+you a list of available terminals, but you’ll most likely switch between xterm,
+st or st-256color. The default value for TERM can be changed in config.h
+(TNAME).
+
+## How do I scroll back up?
+
+Using a terminal multiplexer.
+
+* `st -e tmux` using C-b [
+* `st -e screen` using C-a ESC
+
+## Why doesn't the Del key work in some programs?
Taken from the terminfo manpage:
are pressed, this information can be given. Note that it is not
possible to handle terminals where the keypad only works in
local (this applies, for example, to the unshifted HP 2621 keys).
- If the keypad can be set to transmit or not transmit, tive these
+ If the keypad can be set to transmit or not transmit, give these
codes as smkx and rmkx. Otherwise the keypad is assumed to
always transmit.
-In the st case smkx=\E[?1h\E= and rmkx=\E[?1l\E>, so it is mandatory that
-applications which want to test against keypad keys, have to send these
+In the st case smkx=E[?1hE= and rmkx=E[?1lE>, so it is mandatory that
+applications which want to test against keypad keys send these
sequences.
-But buggy applications like bash and irssi for example don't do this. A fast
+But buggy applications (like bash and irssi, for example) don't do this. A fast
solution for them is to use the following command:
- $ printf "\033?1h\033=" >/dev/tty
+ $ printf '\033[?1h\033=' >/dev/tty
or
$ echo $(tput smkx) >/dev/tty
-In the case of bash readline is used. Readline has a different note in its
+In the case of bash, readline is used. Readline has a different note in its
manpage about this issue:
enable-keypad (Off)
applications using readline.
If you are using zsh, then read the zsh FAQ
-(http://zsh.sourceforge.net/FAQ/zshfaq03.html#l25):
+<http://zsh.sourceforge.net/FAQ/zshfaq03.html#l25>:
It should be noted that the O / [ confusion can occur with other keys
such as Home and End. Some systems let you query the key sequences
zle -N zle-line-finish
Putting these lines into your .zshrc will fix the problems.
---
+
+## How can I use meta in 8bit mode?
+
+ St supports meta in 8bit mode, but the default terminfo entry doesn't
+ use this capability. If you want it, you have to use the 'st-meta' value
+ in TERM.
+
+## I cannot compile st in OpenBSD
+
+OpenBSD lacks of librt, despite it begin mandatory in POSIX
+<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html#tag_20_11_13>.
+If you want to compile st for OpenBSD you have to remove -lrt from config.mk, and
+st will compile without any loss of functionality, because all the functions are
+included in libc on this platform.
+
+## Backspace key does not work
+
+This is an issue that was discussed in suckless mailing list
+<http://lists.suckless.org/dev/1404/20697.html>:
+
+ Well, I am going to comment why I want to change the behaviour
+ of this key. When ASCII was defined in 1968, communication
+ with computers was done using punched cards, or hardcopy
+ terminals (basically a typewriter machine connected with the
+ computer using a serial port). ASCII defines DELETE as 7F,
+ because, in punched-card terms, it means all the holes of the
+ card punched; it is thus a kind of 'physical delete'. In the
+ same way, the BACKSPACE key was a non-destructive backspace,
+ as on a typewriter. So, if you wanted to delete a character,
+ you had to BACKSPACE and then DELETE. Another use of BACKSPACE
+ was to type accented characters, for example 'a BACKSPACE `'.
+ The VT100 had no BACKSPACE key; it was generated using the
+ CONTROL key as another control character (CONTROL key sets to
+ 0 b7 b6 b5, so it converts H (code 0x48) into BACKSPACE (code
+ 0x08)), but it had a DELETE key in a similar position where
+ the BACKSPACE key is located today on common PC keyboards.
+ All the terminal emulators emulated the difference between
+ these keys correctly: the backspace key generated a BACKSPACE
+ (^H) and delete key generated a DELETE (^?).
+
+ But a problem arose when Linus Torvalds wrote Linux. Unlike
+ earlier terminals, the Linux virtual terminal (the terminal
+ emulator integrated in the kernel) returned a DELETE when
+ backspace was pressed, due to the VT100 having a DELETE key in
+ the same position. This created a lot of problems (see [1]
+ and [2]). Since Linux has become the king, a lot of terminal
+ emulators today generate a DELETE when the backspace key is
+ pressed in order to avoid problems with Linux. The result is
+ that the only way of generating a BACKSPACE on these systems
+ is by using CONTROL + H. (I also think that emacs had an
+ important point here because the CONTROL + H prefix is used
+ in emacs in some commands (help commands).)
+
+ From point of view of the kernel, you can change the key
+ for deleting a previous character with stty erase. When you
+ connect a real terminal into a machine you describe the type
+ of terminal, so getty configures the correct value of stty
+ erase for this terminal. In the case of terminal emulators,
+ however, you don't have any getty that can set the correct
+ value of stty erase, so you always get the default value.
+ For this reason, it is necessary to add 'stty erase ^H' to your
+ profile if you have changed the value of the backspace key.
+ Of course, another solution is for st itself to modify the
+ value of stty erase. I usually have the inverse problem:
+ when I connect to non-Unix machines, I have to press CONTROL +
+ h to get a BACKSPACE. The inverse problem occurs when a user
+ connects to my Unix machines from a different system with a
+ correct backspace key.
+
+ [1] http://www.ibb.net/~anne/keyboard.html
+ [2] http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-5.html
Got questions, comments, patches, etc.? Contact Jason Woofenden