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Add CLOEXEC when calling accept on Linux. 

Prevents leakage of file descriptors to subprocesses.
The symptom of the above issue is sockets that don't seem to close
until a subprocess completes.
This commit is contained in:
Calvin Rose 2022-10-10 18:06:31 -05:00
parent 6b27008c99
commit 448ea7167f
1 changed files with 5 additions and 0 deletions
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5
src/core/net.c
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@ -224,7 +224,12 @@ JanetAsyncStatus net_machine_accept(JanetListenerState *s, JanetAsyncEvent event
janet_schedule(s->fiber, janet_wrap_nil());
return JANET_ASYNC_STATUS_DONE;
case JANET_ASYNC_EVENT_READ: {
#if defined(JANET_LINUX)
JSock connfd = accept4(s->stream->handle, NULL, NULL, SOCK_CLOEXEC);
#else
/* On BSDs, CLOEXEC should be inherited from server socket */
JSock connfd = accept(s->stream->handle, NULL, NULL);
#endif
if (JSOCKVALID(connfd)) {
janet_net_socknoblock(connfd);
JanetStream *stream = make_stream(connfd, JANET_STREAM_READABLE | JANET_STREAM_WRITABLE);