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format files to comply with kernel coding standards, rename .config to config

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tomoron
2025-08-13 19:45:11 +02:00
parent 2e4d67d510
commit cf0ab7f1db
10 changed files with 97 additions and 83 deletions
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31
05/main.c
View File

@ -1,3 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
@ -13,30 +14,30 @@ ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off);
ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off);
static const struct file_operations fops = {
.owner = THIS_MODULE,
.read = dev_read,
.write = dev_write,
.owner = THIS_MODULE,
.read = dev_read,
.write = dev_write,
};
static struct miscdevice dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = FILENAME,
.fops = &fops,
.mode = 0666,
.minor = MISC_DYNAMIC_MINOR,
.name = FILENAME,
.fops = &fops,
.mode = 0666,
};
static int __init fortytwo_init(void)
{
static int __init fortytwo_init(void)
{
pr_info("creating fortytwo misc device\n");
return misc_register(&dev);
}
}
static void __exit fortytwo_exit(void)
{
pr_info("removing forytwo misc device\n");
static void __exit fortytwo_exit(void)
{
pr_info("removing forytwo misc device\n");
misc_deregister(&dev);
}
}
module_init(fortytwo_init);
module_init(fortytwo_init);
module_exit(fortytwo_exit);

31
05/rw.c
View File

@ -1,3 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
@ -9,27 +10,29 @@
ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off);
ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off);
ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off) {
char msg[] = VALUE;
ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off)
{
char msg[] = VALUE;
pr_info("someone read from the file\n");
return simple_read_from_buffer(buf, len, off, msg, sizeof(msg) - 1);
return simple_read_from_buffer(buf, len, off, msg, sizeof(msg) - 1);
}
ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off)
{
char kbuf[64];
ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off) {
char kbuf[64];
if (len > sizeof(kbuf) - 1)
return -EINVAL;
if (copy_from_user(kbuf, buf, len))
return -EINVAL;
if (len > sizeof(kbuf) - 1)
return -EINVAL;
if (copy_from_user(kbuf, buf, len))
return -EINVAL;
kbuf[len] = '\0';
kbuf[len] = '\0';
if (strcmp(kbuf, VALUE) == 0)
{
if (strcmp(kbuf, VALUE) == 0) {
pr_info("someone wrote the right string\n");
return len;
return len;
}
pr_info("someone wrote the wrong string\n");
return -EINVAL;
return -EINVAL;
}