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From cd822ff6ef904e3e25060e77556670784b0b1aea Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Tue, 22 Nov 2022 13:00:48 +0100
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Subject: [PATCH] sd-netlink: handle EINTR from poll() gracefully, as success
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(cherry picked from commit 69858785335afffc51bc03127beb53332c0fb983)
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Related: #2137584
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---
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src/libsystemd/sd-netlink/sd-netlink.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/src/libsystemd/sd-netlink/sd-netlink.c b/src/libsystemd/sd-netlink/sd-netlink.c
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index feb751a848..b99abae640 100644
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--- a/src/libsystemd/sd-netlink/sd-netlink.c
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+++ b/src/libsystemd/sd-netlink/sd-netlink.c
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@@ -464,13 +464,18 @@ static int netlink_poll(sd_netlink *nl, bool need_more, usec_t timeout_usec) {
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}
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int sd_netlink_wait(sd_netlink *nl, uint64_t timeout_usec) {
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+ int r;
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+
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assert_return(nl, -EINVAL);
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assert_return(!netlink_pid_changed(nl), -ECHILD);
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if (nl->rqueue_size > 0)
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return 0;
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- return netlink_poll(nl, false, timeout_usec);
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+ r = netlink_poll(nl, false, timeout_usec);
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+ if (r < 0 && ERRNO_IS_TRANSIENT(r)) /* Convert EINTR to "something happened" and give user a chance to run some code before calling back into us */
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+ return 1;
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+ return r;
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}
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static int timeout_compare(const void *a, const void *b) {
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