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@ryanwoodsmall
Created October 25, 2017 07:02
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get linux kernel version from linux/version.h header and uname() syscall
#include <stdio.h>
#include <linux/version.h>
#include <sys/utsname.h>
/*
* from rhel7's linux/version.h:
* #define LINUX_VERSION_CODE 199168
* #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
*/
int main(void)
{
int maj = LINUX_VERSION_CODE >> 16;
int min = ( LINUX_VERSION_CODE - ( maj << 16 ) ) >> 8;
int pat = LINUX_VERSION_CODE - ( maj << 16 ) - ( min << 8 );
struct utsname unamedata;
printf("linux/version.h : %d = %d.%d.%d\n", LINUX_VERSION_CODE, maj, min, pat);
uname(&unamedata);
printf("uname : utsname.release = %s\n", unamedata.release);
return(0);
}
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