From: Guy Lewin <guy@lewin.co.il>
Date: Sat, 7 Apr 2018 22:04:58 +0000 (+0300)
Subject: When SIGINFO (or SIGUSR1) signal sent, also flush the buffer. Useful when you want... 
X-Git-Tag: tcpdump-4.99-bp~1213^2~1
X-Git-Url: https://git.tcpdump.org/tcpdump/commitdiff_plain/ff30ebc5428e7f51c8970cba84f5c7e292c0ae42

When SIGINFO (or SIGUSR1) signal sent, also flush the buffer. Useful when you want to download the dump file and want to have all of the packets.
---

diff --git a/tcpdump.c b/tcpdump.c
index 7d6d5099..dbec2f88 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -255,6 +255,7 @@ static const struct tok status_flags[] = {
 };
 #endif
 
+static pcap_dumper_t *p = NULL;
 static pcap_t *pd;
 
 static int supports_monitor_mode;
@@ -2178,7 +2179,6 @@ DIAG_ON_CLANG(assign-enum)
 	}
 #endif
 	if (WFileName) {
-		pcap_dumper_t *p;
 		/* Do not exceed the default PATH_MAX for files. */
 		dumpinfo.CurrentFileName = (char *)malloc(PATH_MAX + 1);
 
@@ -2905,6 +2905,11 @@ void requestinfo(int signo _U_)
 		++infoprint;
 	else
 		info(0);
+
+#ifdef HAVE_PCAP_DUMP_FLUSH
+	if (p != NULL)
+		pcap_dump_flush(p);
+#endif
 }
 #endif