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-rw-r--r--docs/fs.md27
1 files changed, 17 insertions, 10 deletions
diff --git a/docs/fs.md b/docs/fs.md
index f98a1ae0..3efc5b36 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -123,9 +123,10 @@ and opens into the new editor, which acme, whose Load only adds windows,
never needed); and `Kill`, which
does not quit but stops commands, as acme's does: bare, every command pardes
started, and `Kill make ls`, those whose line begins with one of the words. A
-command pardes started is a line it typed into a terminal (a word written to
-`exec`, a middle click on one, a `pty/run`), from its shell's start mark (C)
-to its end mark (D); Kill sends its foreground job SIGTERM -- acme posts the
+command pardes started is a command pane's, until its child exits -- Kill
+sends its whole process group SIGTERM -- or a line it typed into a terminal (a
+word written to `exec`, a middle click on one, a `pty/run`), from its shell's
+start mark (C) to its end mark (D), where Kill sends its foreground job SIGTERM -- acme posts the
"kill" note, which ends a process -- and never signals the shell itself;
in a shell running without job control (`set +m`) the job shares the
shell's group, so there is none to signal: Kill says `Kill: no job to
@@ -232,13 +233,19 @@ same tree without leaving the process.
- a line written to `exec` is a middle click: a command word from
`src/builtins.zig` (`Save`, `Del`, `New`, `Newcol`, `Mount NAME DIAL`,
`Unmount NAME`, `Dump`, `Restore`, `Msg TEXT`, `Find`, `Grep`, `Tty`, ...),
- or anything else, which is typed into a terminal: the pane itself when it
- is a terminal at its prompt, otherwise a terminal in the pane's directory
- that is at its prompt, and failing both a new one made below the last
- column. That is not an error, whatever the shell makes of the line, and a
- misspelled builtin word ends up there too (whether it should is an open
- question, docs/open-questions.md). `echo Tty > pane/<n>/ctl` makes a
- terminal in that pane's directory outright.
+ or anything else, a command line. Written at a terminal at its prompt it
+ is typed into that shell. From anywhere else -- a file, a scratch, a tag,
+ a terminal whose tty a program holds -- it runs as a command pane: a
+ terminal whose child is `$SHELL -c` the line in the pane's directory,
+ which shows its output and then `exit N` (its tag reads `<dir> (<line>)
+ running`, then `exit N`), and stays. The directory's next command runs in
+ that pane once it is done, below what it showed, after a `% <line>` line;
+ one still running gets a second pane. A command pane's own exec starts
+ the next command there too. The log says `run <serial> <word>` and `exit
+ <serial> <N|?>`; `exec` reads back the command pane's serial; Kill ends
+ its whole process group; a line is at most 1 KB. A misspelled word is a
+ command that says so and ends `exit 127`. `echo Tty > pane/<n>/ctl` makes
+ an interactive terminal in that pane's directory.
The root's pair clicks at the active pane and `/pane/<n>/look` and
`/pane/<n>/exec` at that pane. Blank lines are skipped, and every other line