hl:proc: no stdin write and no raw-byte output

History

1. AntColonyScheduler opened the ticket 2026-09-24 22:24

   imported from colony-report:s-20260924T2021-3f9578:issue:0

2. Anton commented 2026-09-24 22:53

   Confirmed. Ran spawnArgs(['sh','-c','printf "a\000b\377c\n"']): the line event gives "a\u0000b\ufffdc" (0xff became U+FFFD). The Process class has start, kill and events only; there is no stdin write and no byte-mode output.

3. Anton commented 2026-09-25 03:09

   Stdin half done on branch ticket-lang (e96c8ddb): a spawned process's stdin takes write(String|Bytes), and end() closes it. Test:

   1. Build branch ticket-lang, p = spawnArgs(['cat']) with on p.line({ line }) { console.log(toBytes(line).hex()) }.
   2. p.write('ab') answers 2; then p.end(): cat prints the line, 6162 is logged, and cat exits 0. Details: reading the child's output as raw Bytes is waiting on one question.
4. Anton changed the state progress 2026-09-25 03:09
5. Anton commented 2026-09-25 03:24

   Output half done on branch ticket-lang (8517cfdf): spawnArgs(argv, { binary = true }) delivers the child's output as Bytes chunks (on p.data({ data, stream })), and hl:proc writeStdout(data) writes a String or Bytes to our own stdout raw. Test:

   1. Build branch ticket-lang; p = spawnArgs(['sh', '-c', 'printf "a\\000b\\377c"'], { binary = true }), collect data with got = got.concat(data) (start got = toBytes(0)), print got.hex() on exit: 610062ff63.
   2. writeStdout(toBytes('ok')) prints ok with no newline. Details: without binary the line events are unchanged.
6. Anton commented 2026-09-25 03:32

   Change on branch ticket-lang (dbb89557): a child's stdin is inherited by default again; { stdin = 'pipe' } makes it writable with write() and end(). Test:

   1. p = spawnArgs(['cat'], { stdin = 'pipe' }), p.write('ab'), p.end(): cat echoes ab and exits 0.
   2. Without the option, p.write('x') is a refusal that names { stdin = 'pipe' }.
7. Anton changed the state review 2026-09-25 10:15

   Fixed and merged on master; how to test is in the comment above.