mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
37 lines
682 B
C
37 lines
682 B
C
/*
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Give integer and a pointer to the kernel, and get one positive integer out.
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/printk.h> /* printk */
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MODULE_LICENSE("GPL");
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static struct dentry *dir;
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static long unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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pr_info("cmd = %u\n", cmd);
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return cmd + 1;
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}
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static const struct file_operations fops = {
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.unlocked_ioctl = unlocked_ioctl
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};
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static int myinit(void)
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{
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dir = debugfs_create_dir("lkmc_ioctl", 0);
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debugfs_create_file("f", 0666, dir, NULL, &fops);
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return 0;
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}
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static void myexit(void)
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{
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debugfs_remove_recursive(dir);
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}
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module_init(myinit)
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module_exit(myexit)
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