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