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Diffstat (limited to 'docs/dev/php-rpc.md')
| -rw-r--r-- | docs/dev/php-rpc.md | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/docs/dev/php-rpc.md b/docs/dev/php-rpc.md index e55f860e..77d0d365 100644 --- a/docs/dev/php-rpc.md +++ b/docs/dev/php-rpc.md @@ -17,11 +17,16 @@ behavior. ## Transport -- A Unix domain socket (no Windows support for now), bound in a `0700` temp dir with the socket - file itself chmodded to `0600`. +- A `socketpair(2)` (no Windows support for now). The parent keeps one end and installs the + other on descriptor 3 in the child, from a `pre_exec` hook, so the worker opens it as + `php://fd/3` rather than connecting anywhere. A bound path would have to fit in `sun_path` + (108 bytes), which a long `TMPDIR` overruns, and it needs a `bind(2)` that sandboxes commonly + deny. The pair is connected from the start, so nothing has to wait for an `accept` either: a + child that dies before reading surfaces as EOF on the first call, with its exit status + attached. - The PHP glue code (`php/worker.php`) and the proxy stub classes (`php/stubs/`) are embedded in - the Rust binary and written to the temp dir at spawn time, so both halves of the protocol are - always the same commit. + the Rust binary and written to a `0700` temp dir at spawn time, so both halves of the protocol + are always the same commit. ### Frame layout |