X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/f08eb851eedf9775e6485ab75c0d8cf8d1306be6..54d1e9dae883de6cddc814af11bd2861dfb6977a:/tcpdump.c

diff --git a/tcpdump.c b/tcpdump.c
index 1ad22927..b1f88cf3 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -607,6 +607,15 @@ show_devices_and_exit (void)
  *
  * OS X tcpdump uses -P to indicate that -w should write pcap-ng rather
  * than pcap files.
+ *
+ * OS X tcpdump also uses -Q to specify expressions that match packet
+ * metadata, including but not limited to the packet direction.
+ * The expression syntax is different from a simple "in|out|inout",
+ * and those expressions aren't accepted by OS X tcpdump, but the
+ * equivalents would be "in" = "dir=in", "out" = "dir=out", and
+ * "inout" = "dir=in or dir=out", and the parser could conceivably
+ * special-case "in", "out", and "inout" as expressions for backwards
+ * compatibility, so all is not (yet) lost.
  */
 
 /*
@@ -655,6 +664,8 @@ show_devices_and_exit (void)
 #define Q_FLAG
 #endif
 
+#define SHORTOPTS "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpq" Q_FLAG "r:Rs:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#"
+
 /*
  * Long options.
  *
@@ -1061,7 +1072,7 @@ main(int argc, char **argv)
 #endif
 
 	while (
-	    (op = getopt_long(argc, argv, "aAb" B_FLAG "c:C:d" D_FLAG "eE:fF:G:hHi:" I_FLAG j_FLAG J_FLAG "KlLm:M:nNOpq" Q_FLAG "r:Rs:StT:u" U_FLAG "vV:w:W:xXy:Yz:Z:#", longopts, NULL)) != -1)
+	    (op = getopt_long(argc, argv, SHORTOPTS, longopts, NULL)) != -1)
 		switch (op) {
 
 		case 'a':