From 52e822173aa3cd4f610531d32fbf943f026cdca6 Mon Sep 17 00:00:00 2001
From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Sun, 3 Jul 2022 18:20:44 +0200
Subject: select: do not return fatal error on EINTR from poll()

The same was done for select() in 5912da25 but poll() was missed.

Bug: https://bugs.archlinux.org/task/75201
Reported-by: Alexandre Bury (gyscos at archlinux)

Ref: https://github.com/curl/curl/issues/8921
Ref: https://github.com/curl/curl/pull/8961
Ref: https://github.com/curl/curl/commit/5912da25#r77584294

Closes https://github.com/curl/curl/pull/9091
---
 lib/select.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/select.c b/lib/select.c
index c16358d56..2ac074677 100644
--- a/lib/select.c
+++ b/lib/select.c
@@ -310,8 +310,12 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms)
   else
     pending_ms = 0;
   r = poll(ufds, nfds, pending_ms);
-  if(r <= 0)
+  if(r <= 0) {
+    if((r == -1) && (SOCKERRNO == EINTR))
+      /* make EINTR from select or poll not a "lethal" error */
+      r = 0;
     return r;
+  }
 
   for(i = 0; i < nfds; i++) {
     if(ufds[i].fd == CURL_SOCKET_BAD)
-- 
cgit v1.2.3-18-g5258

