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Diffstat (limited to 'docs/fs.md')
| -rw-r--r-- | docs/fs.md | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -908,7 +908,13 @@ where the host cannot name the program, and when text is typed at the prompt) terminal (a REPL, `less`) takes none: write to `pty/data` for it -- which is also when the third field of `pty/status` reads 1. `pty/status` is one line, three right-aligned fields and a newline: the pty's columns and -rows, then busy (0 or 1). The size, and `pty/ctl`'s `winsize` read back, is +rows, then busy (0 or 1). `pty/ctl` takes `winsize C R`, `sig +INT|TERM|HUP|QUIT|KILL` and `exec`, which starts the pane's shell again in +its directory: one that is gone is refused before anything runs, `exec: +<dir>: no such directory` (ENOENT), and a shell the host cannot start fails +the write with why, as any builtin's failure does. A directory removed +under a running shell leaves the pane its name (never `... (deleted)`), so +an `exec` works there once the directory is back. The size, and `pty/ctl`'s `winsize` read back, is what `winsize C R` last set (R of 1 is taken as 2: a one-row pty loses its prompt's mark and would read busy for ever), until the pane itself resizes and gives the pty its grid again. A line written |