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fix(process): use poll() to drain PTY master on Linux (#38005)

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On Linux, libuv's polling (which uses epoll) doesn't flush PTY master's
pending work on kernel workqueue, so use an explicit poll() before that.
This commit is contained in:
zeertzjq
2026-02-23 07:15:38 +08:00
committed by GitHub
parent f90cd620c5
commit 8a4719e117
1 changed files with 12 additions and 1 deletions
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13
src/nvim/event/proc.c
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@@ -3,6 +3,9 @@
#include <signal.h>
#include <string.h>
#include <uv.h>
#ifdef __linux__
# include <poll.h>
#endif
#include "klib/kvec.h"
#include "nvim/channel.h"
@@ -391,9 +394,17 @@ static void flush_stream(Proc *proc, RStream *stream)
// Read remaining data.
while (!stream->s.closed && stream->num_bytes < max_bytes) {
// Remember number of bytes before polling
// Remember number of bytes before polling.
size_t num_bytes = stream->num_bytes;
#ifdef __linux__
// On Linux, libuv's polling (which uses epoll) doesn't flush PTY master's pending
// work on kernel workqueue, so use an explcit poll() before that. #37982
if (proc->type == kProcTypePty && !stream->did_eof) {
struct pollfd pollfd = { .fd = ((PtyProc *)proc)->tty_fd, .events = POLLIN };
poll(&pollfd, 1, 0);
}
#endif
// Poll for data and process the generated events.
loop_poll_events(proc->loop, 0);
if (stream->s.events) {