3rd-party/linux-kernel-module-cheat
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Generalize module_version.c into module_info.c

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Ciro Santilli
2018-04-13 09:13:22 +01:00
parent 2427a322fc
commit d992ba4e6e
4 changed files with 34 additions and 30 deletions
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2
kernel_module/README.adoc
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@@ -9,7 +9,7 @@
.. link:params.c[]
.. link:vermagic.c[]
.. link:vermagic_fail.c[]
.. link:module_version.c[]
.. link:module_info.c[]
. Pseudo filesystems
.. link:debugfs.c[]
.. link:procfs.c[]

2
kernel_module/kstrto.c
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@@ -23,7 +23,7 @@ static ssize_t write(struct file *filp, const char __user *buf, size_t len, loff
pr_info("ko = %d\n", ret);
return ret;
} else {
pr_info("ok = %llu\n", res);
pr_info("ok = %llu\n", res);
*off= len;
return len;
}

32
kernel_module/module_info.c Normal file
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@@ -0,0 +1,32 @@
/*
- https://stackoverflow.com/questions/4839024/how-to-find-the-version-of-a-compiled-kernel-module/42556565#42556565
- https://stackoverflow.com/questions/19467150/significance-of-this-module-in-linux-driver/49812248#49812248
Usage:
insmod /module_info.ko
# dmesg => name = module_info
# dmesg => version = 1.0
cat /sys/module/module_info/version
# => module_info
modinfo /module_info.ko | grep -E '^version:'
# => version: 1.0
*/
#include <linux/module.h>
#include <linux/kernel.h>
static int myinit(void)
{
/* Set by default based on the module file name. */
pr_info("name = %s\n", THIS_MODULE->name);
pr_info("version = %s\n", THIS_MODULE->version);
return 0;
}
static void myexit(void) {}
module_init(myinit)
module_exit(myexit)
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");

28
kernel_module/module_version.c
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@@ -1,28 +0,0 @@
/*
https://stackoverflow.com/questions/4839024/how-to-find-the-version-of-a-compiled-kernel-module/42556565#42556565
insmod /module_version.ko
cat /sys/modules/module_version/version
# => 1.0
cat /sys/module/module_version/srcversion
# => AB0F06618BC3A36B687CDC5
modinfo /module_version.ko | grep -E '^(src|)version'
# => version: 1.0
# => srcversion: AB0F06618BC3A36B687CDC5
*/
#include <linux/module.h>
#include <linux/kernel.h>
static int myinit(void)
{
pr_info(__FILE__ "\n");
return 0;
}
static void myexit(void) {}
module_init(myinit)
module_exit(myexit)
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");