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gdbfs: spawn the gdb processes in the file-server proc's note group

This prevents the gdbproc from getting killed when
one hits [Del] in the same window. (Happens to
interrupt cont()).

--- a/sys/src/cmd/gdbfs/main.c

+++ b/sys/src/cmd/gdbfs/main.c

@@ -250,7 +250,16 @@

 	}

 }

+static int rfd = 0, wfd = 1;

+

+static void

+start(Srv*)

+{

+	gdbinit(rfd, wfd);

+}

+

 Srv fs = {

+	.start	= start,

 	.open	= fsopen,

 	.read	= fsread,

 	.write	= fswrite,

@@ -262,7 +271,7 @@

 void

 threadmain(int argc, char *argv[])

 {

-	int i, rfd, wfd;

+	int i;

 	File *dir;

 	Fhdr hdr;

 	char *textfile, *arch;

@@ -304,11 +313,9 @@

 	} else

 		sysfatal("-t or -m required");

-	rfd = 0;

-	wfd = 1;

 	switch(argc){

 	case 1:

-		rfd = dial(argv[0], nil, nil, nil);

+		rfd = dial(netmkaddr(argv[0], "tcp", "1234"), nil, nil, nil);

 		if(rfd == -1)

 			sysfatal("dial %s: %r", argv[1]);

 		wfd = rfd;

@@ -319,7 +326,6 @@

 		usage();

 	}

-	gdbinit(rfd, wfd);

 	fs.tree = alloctree("gdbfs", "gdbfs", DMDIR|0555, nil);

 	dir = createfile(fs.tree->root, procname, "gdbfs", DMDIR|0555, 0);

 	for(i = 0; i < nelem(tab); i++)

-- 

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