Report periodic stats only when safe to do so. [skip ci]

[tcpdump] / tcpdump.c

diff --git a/tcpdump.c b/tcpdump.c
index 939df0b46fe964ba514b6b706a85fda981a9c67b..d5d35ffbfe58ac421a534971567eace9a1cad516 100644 (file)
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -2438,11 +2438,14 @@ DIAG_ON_CLANG(assign-enum)
        (void)setsignal(SIGNAL_FLUSH_PCAP, flushpcap);
 #endif
 
-       if (ndo->ndo_vflag > 0 && WFileName && !print) {
+       if (ndo->ndo_vflag > 0 && WFileName && RFileName == NULL && !print) {
                /*
                 * When capturing to a file, if "--print" wasn't specified,
                 *"-v" means tcpdump should, once per second,
                 * "v"erbosely report the number of packets captured.
+                * Except when reading from a file, because -r, -w and -v
+                * together used to make a corner case, in which pcap_loop()
+                * errored due to EINTR (see GH #155 for details).
                 */
 #ifdef _WIN32
                /*