44 lines
938 B
C
44 lines
938 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/miscdevice.h>
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#include <linux/uaccess.h>
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("hello world module");
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#define FILENAME "fortytwo"
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ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off);
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ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off);
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static const struct file_operations fops = {
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.owner = THIS_MODULE,
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.read = dev_read,
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.write = dev_write,
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};
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static struct miscdevice dev = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = FILENAME,
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.fops = &fops,
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.mode = 0666,
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};
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static int __init fortytwo_init(void)
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{
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pr_info("creating fortytwo misc device\n");
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return misc_register(&dev);
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}
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static void __exit fortytwo_exit(void)
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{
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pr_info("removing forytwo misc device\n");
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misc_deregister(&dev);
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}
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module_init(fortytwo_init);
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module_exit(fortytwo_exit);
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