20060303

1 files changed, 147 insertions, 0 deletions

diff --git a/os/port/devXXX.c b/os/port/devXXX.c
new file mode 100644
index 00000000..2c76abcd
--- /dev/null
+++ b/os/port/devXXX.c
@@ -0,0 +1,147 @@
+/*
+ *  template for making a new device
+ */
+#include	"u.h"
+#include	"../port/lib.h"
+#include	"mem.h"
+#include	"dat.h"
+#include	"fns.h"
+#include	"../port/error.h"
+
+
+enum{
+	Qdir,
+	Qdata,
+};
+
+static
+Dirtab XXXtab[]={
+	".",			{Qdir, 0, QTDIR},	0,	0555,	/* entry for "." must be first if devgen used */
+	"data",		{Qdata, 0},	0,	0666,
+};
+
+static void
+XXXreset(void)						/* default in dev.c */
+{
+}
+
+static void
+XXXinit(void)						/* default in dev.c */
+{
+}
+
+static Chan*
+XXXattach(char* spec)
+{
+	return devattach('X', spec);
+}
+
+static Walkqid*
+XXXwalk(Chan *c, Chan *nc, char **name, int nname)
+{
+	return devwalk(c, nc, name, nname, XXXtab, nelem(XXXtab), devgen);
+}
+
+static int
+XXXstat(Chan* c, uchar *db, int n)
+{
+	return devstat(c, db, n, XXXtab, nelem(XXXtab), devgen);
+}
+
+static Chan*
+XXXopen(Chan* c, int omode)
+{
+	return devopen(c, omode, XXXtab, nelem(XXXtab), devgen);
+}
+
+static void
+XXXcreate(Chan* c, char* name, int omode, ulong perm)	/* default in dev.c */
+{
+	USED(c, name, omode, perm);
+	error(Eperm);
+}
+
+static void
+XXXremove(Chan* c)					/* default in dev.c */
+{
+	USED(c);
+	error(Eperm);
+}
+
+static int
+XXXwstat(Chan* c, uchar *dp, int n)				/* default in dev.c */
+{
+	USED(c, dp);
+	error(Eperm);
+	return n;
+}
+
+static void
+XXXclose(Chan* c)
+{
+	USED(c);
+}
+
+static long
+XXXread(Chan* c, void* a, long n, vlong offset)
+{
+	USED(offset);
+
+	switch((ulong)c->qid.path){
+	case Qdir:
+		return devdirread(c, a, n, XXXtab, nelem(XXXtab), devgen);
+	case Qdata:
+		break;
+	default:
+		n=0;
+		break;
+	}
+	return n;
+}
+
+static Block*
+XXXbread(Chan* c, long n, ulong offset)			/* default in dev.c */
+{
+	return devbread(c, n, offset);
+}
+
+static long
+XXXwrite(Chan* c, void* a, long n, vlong offset)
+{
+	USED(a, offset);
+
+	switch((ulong)c->qid.path){
+	case Qdata:
+		break;
+	default:
+		error(Ebadusefd);
+	}
+	return n;
+}
+
+static long
+XXXbwrite(Chan* c, Block* bp, ulong offset)		/* default in dev.c */
+{
+	return devbwrite(c, bp, offset);
+}
+
+Dev XXXdevtab = {					/* defaults in dev.c */
+	'X',
+	"XXX",
+
+	XXXreset,					/* devreset */
+	XXXinit,					/* devinit */
+	devshutdown,
+	XXXattach,
+	XXXwalk,
+	XXXstat,
+	XXXopen,
+	XXXcreate,					/* devcreate */
+	XXXclose,
+	XXXread,
+	XXXbread,					/* devbread */
+	XXXwrite,
+	XXXbwrite,					/* devbwrite */
+	XXXremove,					/* devremove */
+	XXXwstat,					/* devwstat */
+};