Allow remote debugging over a Unix local domain socket.

Extend the "target remote" and "target extended-remote" commands
such that if the filename provided is a Unix local domain (AF_UNIX)
socket, then it'll be treated as such, instead of trying to open
it as if it were a character device.

gdb/ChangeLog:
	* NEWS: Mention changed commands.
	* ser-uds.c: New file.
	* configure.ac (SER_HARDWIRE): Add ser-uds.o.
	* configure: Regenerate.
	* Makefile.in: Add new file.
	* serial.c (serial_open): Check if filename is a socket
	  and lookup the appropriate interface accordingly.

gdb/doc/ChangeLog:
	* gdb.texinfo (Remote Connection Commands): Describe
	  the changes to target remote and target extended-remote
	  relating to Unix domain sockets.

1 files changed, 11 insertions, 1 deletions

diff --git a/gdb/serial.c b/gdb/serial.c
index fb2b212..7f9362a 100644
--- a/gdb/serial.c
+++ b/gdb/serial.c
@@ -213,7 +213,17 @@ serial_open (const char *name)
   else if (strchr (name, ':'))
     ops = serial_interface_lookup ("tcp");
   else
-    ops = serial_interface_lookup ("hardwire");
+    {
+#ifndef USE_WIN32API
+      /* Check to see if name is a socket.  If it is, then treat it
+         as such.  Otherwise assume that it's a character device.  */
+      struct stat sb;
+      if (stat (name, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFSOCK)
+	ops = serial_interface_lookup ("local");
+      else
+#endif
+	ops = serial_interface_lookup ("hardwire");
+    }
 
   if (!ops)
     return NULL;