Add -yy option: print ip and port associated with socket descriptors
When two ore more -y options are given, print local and remote ip:port
pairs associated with socket descriptors. This implementation uses
NETLINK_INET_DIAG for sockaddr lookup; it's based on the patch
prepared by Zubin Mithra as a part of his GSoC 2014 strace project.
* Makefile.am (strace_SOURCES): Add socketutils.c
(EXTRA_DIST): Add linux/inet_diag.h and linux/sock_diag.h.
* defs.h (print_sockaddr_by_inode): New prototype.
* linux/inet_diag.h: New file.
* linux/sock_diag.h: Likewise.
* socketutils.c: Likewise.
* strace.1: Document -yy option.
* strace.c (usage): Likewise.
* util.c (printfd): Use print_sockaddr_by_inode.
diff --git a/strace.1 b/strace.1
index 2a24c38..1e69217 100644
--- a/strace.1
+++ b/strace.1
@@ -321,6 +321,9 @@
.B \-y
Print paths associated with file descriptor arguments.
.TP
+.B \-yy
+Print ip:port pairs associated with socket file descriptors.
+.TP
.BI "\-a " column
Align return values in a specific column (default column 40).
.TP