Default to first interface from pcap_findalldevs()

[tcpdump] / machdep.c

diff --git a/machdep.c b/machdep.c
index 3b8c9664f26669a38e5aaea3fc6903e61ece4e1c..1f0861611326b7e9828fad42072d56097c44aff3 100644 (file)
--- a/machdep.c
+++ b/machdep.c
@@ -29,7 +29,7 @@
  * need to do to get it defined?  This is clearly wrong, as we shouldn't
  * have to include UNIX or Windows system header files to get it.
  */
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #ifndef HAVE___ATTRIBUTE__
 #define __attribute__(x)
@@ -50,6 +50,15 @@ int snprintf(char *, size_t, const char *, ...)
 
 #include "machdep.h"
 
+/*
+ * On platforms where the CPU doesn't support unaligned loads, force
+ * unaligned accesses to abort with SIGBUS, rather than being fixed
+ * up (slowly) by the OS kernel; on those platforms, misaligned accesses
+ * are bugs, and we want tcpdump to crash so that the bugs are reported.
+ *
+ * The only OS on which this is necessary is DEC OSF/1^W^WDigital
+ * UNIX^W^WTru64 UNIX.
+ */
 int
 abort_on_misalignment(char *ebuf _U_, size_t ebufsiz _U_)
 {