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diverse:fkernelmodul:v2025 [06-03-2025 18:47] (nuværende) tjen19 oprettet |
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| + | grundet uforsvarlige ændringer i linux kernen gennem de få 20 år siden [[diverse:fkernelmodul|]] blev skabt, er følgende diff nødvendig: | ||
| + | <code diff> | ||
| + | diff --git a/f-kernel.c b/f-kernel.c | ||
| + | index be62e81..d7e2d7f 100644 | ||
| + | --- a/f-kernel.c | ||
| + | +++ b/f-kernel.c | ||
| + | @@ -1,6 +1,7 @@ | ||
| + | #include <linux/kernel.h> | ||
| + | #include <linux/module.h> | ||
| + | #include <linux/fs.h> | ||
| + | +#include <linux/uaccess.h> | ||
| + | |||
| + | #define MAX_Fs 99999 //-1 for infinitet | ||
| + | |||
| + | @@ -20,9 +21,11 @@ static int device_close(struct inode *i, struct file *f) | ||
| + | } | ||
| + | |||
| + | static ssize_t device_read( | ||
| + | - struct file *f, char *buffer, size_t length, loff_t *offset) | ||
| + | + struct file *f, char __user *buffer, size_t length, loff_t *offset) | ||
| + | { | ||
| + | - *buffer = 'F'; | ||
| + | + char F = 'F'; | ||
| + | + copy_to_user(buffer, &F, 1); | ||
| + | + | ||
| + | fCount++; | ||
| + | |||
| + | if (fCount != -1 && fCount >= MAX_Fs){ | ||
| + | @@ -33,12 +36,15 @@ static ssize_t device_read( | ||
| + | } | ||
| + | |||
| + | static ssize_t device_write( | ||
| + | - struct file *f, const char *buffer, size_t length, loff_t *offset) | ||
| + | + struct file *f, const char __user *buffer, size_t length, loff_t *offset) | ||
| + | { | ||
| + | - if (*buffer = 'F' || *buffer = 'f'){ | ||
| + | + char buf; | ||
| + | + copy_from_user(&buf, buffer, 1); | ||
| + | + | ||
| + | + if (buf == 'F' || buf == 'f'){ | ||
| + | fCount--; | ||
| + | }else{ | ||
| + | - panic("My world only contains F!!! ") | ||
| + | + panic("My world only contains F!!! "); | ||
| + | } | ||
| + | return length; | ||
| + | } | ||
| + | @@ -67,11 +73,11 @@ static int device_init(void) | ||
| + | |||
| + | static void device_exit(void) | ||
| + | { | ||
| + | - int n = unregister_chrdev(major, "null device"); | ||
| + | - if (n < 0) | ||
| + | - { | ||
| + | - printk("Cleanup failed (%d)\n", n); | ||
| + | - } | ||
| + | + unregister_chrdev(major, "null device"); | ||
| + | + //if (n < 0) | ||
| + | + //{ | ||
| + | + // printk("Cleanup failed (%d)\n", n); | ||
| + | + //} | ||
| + | } | ||
| + | |||
| + | module_init(device_init); | ||
| + | </code> | ||
