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Simple kernel module example. Lists process list and count.
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#include <linux/module.h> // Needed by all modules | |
#include <linux/kernel.h> // KERN_INFO | |
#include <linux/sched.h> // for_each_process, pr_info | |
void procs_info_print(void) | |
{ | |
struct task_struct* task_list; | |
size_t process_counter = 0; | |
for_each_process(task_list) { | |
pr_info("== %s [%d]\n", task_list->comm, task_list->pid); | |
++process_counter; | |
} | |
printk(KERN_INFO "== Number of process: %zu\n", process_counter); | |
} | |
int init_module(void) | |
{ | |
printk(KERN_INFO "[ INIT ==\n"); | |
procs_info_print(); | |
return 0; | |
} | |
void cleanup_module(void) | |
{ | |
printk(KERN_INFO "== CLEANUP ]\n"); | |
} | |
MODULE_LICENSE("MIT"); |
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obj-m += lkm_hello1.o | |
KDIR ?= /lib/modules/$(shell uname -r)/build | |
all: | |
make -C $(KDIR) M=$(PWD) modules | |
clean: | |
make -C $(KDIR) M=$(PWD) clean |
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