tcpdump/backport-0090-Set-SA_RESTART-non-lethal-signals-avoid-corrupting-binary-pcap-output.patch

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From 8a28e07f3bfd2a031491db55173370e10dc074e3 Mon Sep 17 00:00:00 2001
From: Alexandre Ferrieux <alexandre.ferrieux@orange.com>
Date: Sat, 16 Jul 2022 21:34:39 +0200
Subject: [PATCH] Set SA_RESTART on non-lethal signals (REQ_INFO, FLUSH_PCAP)
to avoid corrupting binary pcap output
---
tcpdump.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tcpdump.c b/tcpdump.c
index e028d2e7..515edf5d 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -2743,7 +2743,14 @@ static void
memset(&new, 0, sizeof(new));
new.sa_handler = func;
- if (sig == SIGCHLD)
+ if ((sig == SIGCHLD)
+# ifdef SIGNAL_REQ_INFO
+ || (sig == SIGNAL_REQ_INFO)
+# endif
+# ifdef SIGNAL_FLUSH_PCAP
+ || (sig == SIGNAL_FLUSH_PCAP)
+# endif
+ )
new.sa_flags = SA_RESTART;
if (sigaction(sig, &new, &old) < 0)
return (SIG_ERR);
--
2.25.1