Sample modules for KLD.

PR: misc/8621
Submitted by: Rajesh Vaidheeswarran <rv@fore.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/share/examples/kld/cdev/module/cdev.c b/share/examples/kld/cdev/module/cdev.c
new file mode 100644
index 0000000..4c9e139
--- /dev/null
+++ b/share/examples/kld/cdev/module/cdev.c
@@ -0,0 +1,124 @@
+/* 08 Nov 1998*/
+/*
+ * cdev.c
+ *
+ * 08 Nov 1998	Rajesh Vaidheeswarran
+ *
+ * Copyright (c) 1998 Rajesh Vaidheeswarran
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Rajesh Vaidheeswarran.
+ * 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE RAJESH VAIDHEESWARRAN BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+  * Copyright (c) 1993 Terrence R. Lambert.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Terrence R. Lambert.
+ * 4. The name Terrence R. Lambert may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/ioccom.h>
+#include "cdev.h"
+
+/*
+ * This is the actual code for the system call... it can't be static because
+ * it is exported to another part of the module... the only place it needs
+ * to be referenced is the sysent we are interested in.
+ *
+ * To write your own system call using this as a template, you could strip
+ * out this code and use the rest as a prototype module, changing only the
+ * function names and the number of arguments to the call in the module
+ * specific "sysent".
+ *
+ * You would have to use the "-R" option of "ld" to ensure a linkable file
+ * if you were to do this, since you would need to combine multiple ".o"
+ * files into a single ".o" file for use by "modload".
+ */
+
+#define CDEV_IOCTL1         _IOR('C', 1, u_int)
+
+int
+mydev_open(dev_t dev, int flag, int otyp, struct proc *procp)
+{
+    printf("mydev_open: dev_t=%d, flag=%x, otyp=%x, procp=%p\n",
+	   dev, flag, otyp, procp);
+    return (0);
+}
+
+int
+mydev_close(dev_t dev, int flag, int otyp, struct proc *procp)
+{
+    printf("mydev_close: dev_t=%d, flag=%x, otyp=%x, procp=%p\n",
+	      dev, flag, otyp, procp);
+    return (0);
+}
+
+int
+mydev_ioctl(dev_t dev, u_long cmd, caddr_t arg, int mode, struct proc *procp)
+{
+    int error = 0;
+
+    printf("mydev_ioctl: dev_t=%d, cmd=%lx, arg=%p, mode=%x procp=%p\n",
+	   dev, cmd, arg, mode, procp);
+
+    switch(cmd) {
+    case CDEV_IOCTL1:
+	printf("you called mydev_ioctl CDEV_IOCTL1\n");
+	break;
+    default:
+	printf("No such ioctl for me!\n");
+	error = EINVAL;
+	break;
+    }
+    return error;
+}