906318f2b6
Xorg finds its VT through /dev/tty0, and without one ran on none: the console went on drawing into the framebuffer over the X screen. tty0 is the terminal on screen, as on Linux. FBIOPUTCMAP succeeds, as it does on a true-colour Linux framebuffer, instead of 256 logged errors per start. schos-base gives root a .xserverrc with -dumbSched, Xorg's switch for input on the main loop: SchOS has no threads, and Xorg crashed in pthread_join on its input thread when the first client left. It adds the hostname to /etc/hosts, so xauth can resolve schos:0. zsh loses PROMPT_SP: on a serial terminal narrower than the console its padding wrapped and left a # above every prompt. bootcheck knows zsh's prompt and matches without colour codes, so busybox's ls reads as text. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
122 lines
5.7 KiB
Shell
122 lines
5.7 KiB
Shell
# /etc/zsh/zshrc — the system-wide interactive zsh configuration for SchOS.
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#
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# Deliberately short. This sets up the things an interactive shell is useless
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# without -- history, completion, and the keys a console sends -- and stops.
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# Anything beyond that belongs in a user's own ~/.zshrc, which is the file zsh
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# reads after this one.
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# ---------------------------------------------------------------------------
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# History
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# ---------------------------------------------------------------------------
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HISTFILE=${HOME:-/root}/.zsh_history
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HISTSIZE=2000
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SAVEHIST=2000
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setopt APPEND_HISTORY INC_APPEND_HISTORY SHARE_HISTORY
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setopt HIST_IGNORE_DUPS HIST_IGNORE_SPACE HIST_REDUCE_BLANKS
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# ---------------------------------------------------------------------------
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# Behaviour
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# ---------------------------------------------------------------------------
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setopt AUTO_CD # `cd /tmp` is implied by typing `/tmp`
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setopt EXTENDED_GLOB
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setopt INTERACTIVE_COMMENTS # a # in an interactive line is a comment
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setopt NO_BEEP # SchOS has no audio, but it would also scroll
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unsetopt FLOW_CONTROL # ^S/^Q are worth more as keys than as flow control
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# No PROMPT_SP. It marks output that did not end in a newline by printing a
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# `#` and then padding to $COLUMNS, trusting the terminal to wrap so the next
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# CR can erase it. The console is mirrored to the serial port, and a host
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# terminal narrower than the SchOS screen wraps the padding early: every
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# prompt came with a `#` line above it.
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unsetopt PROMPT_SP
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# ---------------------------------------------------------------------------
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# Keys
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# ---------------------------------------------------------------------------
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# Emacs bindings, because that is what every other line editor on the system
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# does -- mksh's default and the kernel's own canonical-mode editing both.
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bindkey -e
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# Home, End, Delete and the arrows, taken from terminfo rather than written
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# out as escape sequences. The sequences differ between the SchOS console and
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# a serial terminal; the terminal's own description does not.
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typeset -A _sch_keys=(
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"${terminfo[khome]}" beginning-of-line
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"${terminfo[kend]}" end-of-line
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"${terminfo[kdch1]}" delete-char
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"${terminfo[kich1]}" overwrite-mode
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"${terminfo[kcuu1]}" up-line-or-search
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"${terminfo[kcud1]}" down-line-or-search
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"${terminfo[kcub1]}" backward-char
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"${terminfo[kcuf1]}" forward-char
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)
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for _k _w in "${(@kv)_sch_keys}"; do
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[[ -n $_k ]] && bindkey -- "$_k" "$_w"
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done
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unset _sch_keys _k _w
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# A terminal that has just been resized, or that zsh has just taken over, may
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# not have told terminfo yet. This puts the keypad in the mode the escape
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# sequences above were described for, and takes it back out on exit.
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if (( ${+terminfo[smkx]} && ${+terminfo[rmkx]} )); then
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autoload -Uz add-zle-hook-widget 2>/dev/null
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function _sch_zle_init { echoti smkx }
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function _sch_zle_line_finish { echoti rmkx }
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zle -N zle-line-init _sch_zle_init
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zle -N zle-line-finish _sch_zle_line_finish
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fi
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# ---------------------------------------------------------------------------
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# Completion
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# ---------------------------------------------------------------------------
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# Completion is NOT initialised here yet, and the reason is a filesystem
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# measurement rather than anything to do with zsh.
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#
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# A small write to SchFS costs about 58 ms, because every operation is its own
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# transaction group and a commit is two cache flushes and an uberblock write --
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# see the comment at the top of kernel/fs/schfs/kmount.c, which describes the
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# trade-off exactly. Measured on this machine, 200 writes:
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#
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# to one open file on SchFS 11.75 s (58 ms each)
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# open + write + close each 21.39 s (107 ms each)
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# to /dev/null 0.14 s (0.7 ms each)
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#
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# compdump writes the digest with a few thousand separate `print` calls, so
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# compinit -d takes minutes and looks exactly like a hang. compinit itself is
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# fine: with -D, which skips the dump, it finishes in 3.6 seconds.
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#
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# So this waits for deferred commits. When small writes stop costing a disk
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# barrier each, delete this comment and uncomment the three lines below.
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#
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# autoload -Uz compinit
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# compinit -u -d ${HOME:-/root}/.zcompdump
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#
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# Until then, completion is available on demand in a shell you do not mind
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# waiting three seconds for:
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#
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# autoload -Uz compinit && compinit -D -u
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#
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# -u is not optional whenever this is turned back on. Without it compinit runs
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# compaudit, decides the function directories are "insecure" because SchOS has
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# no ownership model to check, and *prompts* for an answer on a shell that is
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# still starting up -- which is a real hang, unlike the one above.
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# These take effect as soon as compinit is turned on above; a zstyle with no
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# completion system to read it is inert, not an error.
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zstyle ':completion:*' menu select
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zstyle ':completion:*' matcher-list 'm:{a-z}={A-Za-z}' # case-insensitive
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zstyle ':completion:*' list-colors ''
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zstyle ':completion:*:descriptions' format '%F{244}%d%f'
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# ---------------------------------------------------------------------------
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# Prompt
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# ---------------------------------------------------------------------------
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# The accent violet from include/gfx/theme.h, which is 99 in the 256-colour cube
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# and falls back to magenta on the 8-colour console. The last-status marker is
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# the only thing here that ever turns red -- same rule as the rest of the
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# system: normal states are calm, only failure is loud.
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setopt PROMPT_SUBST
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# The chevron is », not ❯. The console font is CP437 and has a glyph for
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# the first and none for the second, so ❯ renders as '?' -- correctly, since
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# drawing a *different* character would be worse, but it still looks broken.
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PROMPT='%F{magenta}%B%n@schos%b%f %F{cyan}%~%f %(?.%F{green}».%F{red}»)%f '
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RPROMPT=''
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