c09015dd04
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
117 lines
6.0 KiB
C
117 lines
6.0 KiB
C
/*
|
|
* Check the lz insn.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include "sys.h"
|
|
|
|
#define __LINUX_KERNEL_VERSION 131584
|
|
|
|
#define DL_SYSDEP_OSCHECK(FATAL) \
|
|
do { \
|
|
/* Test whether the kernel is new enough. This test is only \
|
|
performed if the library is not compiled to run on all \
|
|
kernels. */ \
|
|
if (__LINUX_KERNEL_VERSION > 0) \
|
|
{ \
|
|
char bufmem[64]; \
|
|
char *buf = bufmem; \
|
|
unsigned int version; \
|
|
int parts; \
|
|
char *cp; \
|
|
struct utsname uts; \
|
|
\
|
|
/* Try the uname syscall */ \
|
|
if (__uname (&uts)) \
|
|
{ \
|
|
/* This was not successful. Now try reading the /proc \
|
|
filesystem. */ \
|
|
ssize_t reslen; \
|
|
int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \
|
|
if (fd == -1 \
|
|
|| (reslen = __read (fd, bufmem, sizeof (bufmem))) <= 0) \
|
|
/* This also didn't work. We give up since we cannot \
|
|
make sure the library can actually work. */ \
|
|
FATAL ("FATAL: cannot determine library version\n"); \
|
|
__close (fd); \
|
|
buf[MIN (reslen, (ssize_t) sizeof (bufmem) - 1)] = '\0'; \
|
|
} \
|
|
else \
|
|
buf = uts.release; \
|
|
\
|
|
/* Now convert it into a number. The string consists of at most \
|
|
three parts. */ \
|
|
version = 0; \
|
|
parts = 0; \
|
|
cp = buf; \
|
|
while ((*cp >= '0') && (*cp <= '9')) \
|
|
{ \
|
|
unsigned int here = *cp++ - '0'; \
|
|
\
|
|
while ((*cp >= '0') && (*cp <= '9')) \
|
|
{ \
|
|
here *= 10; \
|
|
here += *cp++ - '0'; \
|
|
} \
|
|
\
|
|
++parts; \
|
|
version <<= 8; \
|
|
version |= here; \
|
|
\
|
|
if (*cp++ != '.') \
|
|
/* Another part following? */ \
|
|
break; \
|
|
} \
|
|
\
|
|
if (parts < 3) \
|
|
version <<= 8 * (3 - parts); \
|
|
\
|
|
/* Now we can test with the required version. */ \
|
|
if (version < __LINUX_KERNEL_VERSION) \
|
|
/* Not sufficient. */ \
|
|
FATAL ("FATAL: kernel too old\n"); \
|
|
\
|
|
_dl_osversion = version; \
|
|
} \
|
|
} while (0)
|
|
|
|
int main(void)
|
|
{
|
|
char bufmem[64] = "2.6.22";
|
|
char *buf = bufmem;
|
|
unsigned int version;
|
|
int parts;
|
|
char *cp;
|
|
|
|
version = 0;
|
|
parts = 0;
|
|
cp = buf;
|
|
while ((*cp >= '0') && (*cp <= '9'))
|
|
{
|
|
unsigned int here = *cp++ - '0';
|
|
|
|
while ((*cp >= '0') && (*cp <= '9'))
|
|
{
|
|
here *= 10;
|
|
here += *cp++ - '0';
|
|
}
|
|
|
|
++parts;
|
|
version <<= 8;
|
|
version |= here;
|
|
|
|
if (*cp++ != '.')
|
|
/* Another part following? */
|
|
break;
|
|
}
|
|
|
|
if (parts < 3)
|
|
version <<= 8 * (3 - parts);
|
|
if (version < __LINUX_KERNEL_VERSION)
|
|
err();
|
|
pass();
|
|
exit(0);
|
|
}
|