[src/trunk]: src/sys/rump/net/lib/libshmif Recognize ``-'' for stdout. allow...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/06f565ecc81f
branches:  trunk
changeset: 757064:06f565ecc81f
user:      pooka <pooka%NetBSD.org@localhost>
date:      Thu Aug 12 18:22:40 2010 +0000

description:
Recognize ``-'' for stdout.  allows piping output to tcpdump -r -

diffstat:

 sys/rump/net/lib/libshmif/dumpbus.c |  12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diffs (26 lines):

diff -r fd922d48e1ce -r 06f565ecc81f sys/rump/net/lib/libshmif/dumpbus.c
--- a/sys/rump/net/lib/libshmif/dumpbus.c       Thu Aug 12 18:17:23 2010 +0000
+++ b/sys/rump/net/lib/libshmif/dumpbus.c       Thu Aug 12 18:22:40 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dumpbus.c,v 1.4 2010/08/12 18:17:23 pooka Exp $        */
+/*     $NetBSD: dumpbus.c,v 1.5 2010/08/12 18:22:40 pooka Exp $        */
 
 /*
  * Little utility to convert shmif bus traffic to a pcap file
@@ -83,9 +83,13 @@
        if (pcapfile) {
                struct pcap_file_header phdr;
 
-               pfd = open(pcapfile, O_RDWR | O_CREAT, 0777);
-               if (pfd == -1)
-                       err(1, "create pcap dump");
+               if (strcmp(pcapfile, "-") == 0) {
+                       pfd = STDOUT_FILENO;
+               } else {
+                       pfd = open(pcapfile, O_RDWR | O_CREAT, 0777);
+                       if (pfd == -1)
+                               err(1, "create pcap dump");
+               }
 
                memset(&phdr, 0, sizeof(phdr));
                phdr.magic = 0xa1b2c3d4; /* tcpdump magic */