Blenderwizard/drivers_and_interrupts
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added misc driver log output

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Signed-off-by: Jolan Rathelot <jrathelo@student.42nice.fr>
This commit is contained in:
Jolan Rathelot
2024-03-15 15:24:42 +01:00
parent bf5d9ed83b
commit 2f8b9a1e37
2 changed files with 52 additions and 8 deletions
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50
src/misc_device_fops.c
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@@ -4,9 +4,6 @@
#include "drivers_and_interrupts.h"
// 17:06:43 "d" (0x64) PRESSED
//
size_t calc_node_size(struct linked_list_node *node) {
size_t size = 14;
if (node->key.state == PRESSED) {
@@ -24,5 +21,50 @@ size_t calc_node_size(struct linked_list_node *node) {
ssize_t read_keyboard_misc_device(struct file *file, char __user *buf, size_t count, loff_t *ppos) {
return simple_read_from_buffer(buf, count, ppos, "jrathelo", strlen("jrathelo"));
struct linked_list_node *tmp;
loff_t node_offset = *ppos;
mutex_lock(&lock);
list_for_each_entry(tmp, &keyboard_log, list) {
if (node_offset < tmp->size) {
break;
}
node_offset -= tmp->size;
}
if (node_offset > tmp->size) {
printk("early exit\n");
return 0;
}
// if (count > len - *ppos) {
// count = len - *ppos;
// }
size_t user_offset = 0;
for (; !list_entry_is_head(tmp, &keyboard_log, list); tmp = list_next_entry(tmp, list)) {
char sec = (tmp->when.tv_sec - (sys_tz.tz_minuteswest * 60)) % 60;
char min = (tmp->when.tv_sec - (sys_tz.tz_minuteswest * 60)) / 60 % 60;
char hour = (tmp->when.tv_sec - (sys_tz.tz_minuteswest * 60)) / 60 / 60 % 24;
char *buffer = kmalloc(sizeof(char) * tmp->size, GFP_KERNEL);
memset(buffer, 0, tmp->size);
snprintf(buffer, tmp->size, "%02d:%02d:%02d \"%s\"", hour, min, sec, tmp->key.key_name);
if (tmp->key.ascii_value) {
snprintf(buffer + strlen(buffer), tmp->size - strlen(buffer), "(0x%02x) ", tmp->key.ascii_value);
}
if (tmp->key.state == PRESSED) {
snprintf(buffer + strlen(buffer), tmp->size - strlen(buffer), "PRESSED\n");
} else {
snprintf(buffer + strlen(buffer), tmp->size - strlen(buffer), "RELEASED\n");
}
if (copy_to_user(buf + user_offset, buffer + node_offset, tmp->size - node_offset)) {
kfree(buffer);
return -EFAULT;
}
kfree(buffer);
user_offset += tmp->size - node_offset;
node_offset = 0;
}
*ppos += (long long)user_offset;
mutex_unlock(&lock);
return (long long)user_offset;
}