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* elf/Makefile (distribute): Add dl-osinfo.h.
	* sysdeps/generic/dl-osinfo.h: New file.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: New file.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Use DL_SYSDEP_OSCHECK
	if defined.
	* sysdeps/unix/sysv/linux/init-first.c: Perform kernel version test
	only for !SHARED case.  Get the code from dl-osinfo.h.
This commit is contained in:
Ulrich Drepper
2000-08-22 17:48:22 +00:00
parent ea83223c5c
commit 32b4fe6a63
6 changed files with 124 additions and 66 deletions
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70
sysdeps/unix/sysv/linux/init-first.c
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@ -24,10 +24,13 @@
#include <sysdep.h>
#include <fpu_control.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include "kernel-features.h"
#ifndef SHARED
# include "dl-osinfo.h"
#endif
extern void __libc_init_secure (void);
extern void __libc_init (int, char **, char **);
extern void __libc_global_ctors (void);
@ -69,68 +72,9 @@ init (int argc, char **argv, char **envp)
/* Make sure we don't initialize twice. */
if (!__libc_multiple_libcs)
{
/* 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)
{
static const int sysctl_args[] = { CTL_KERN, KERN_OSRELEASE };
char buf[64];
size_t reslen = sizeof (buf);
unsigned int version;
int parts;
char *cp;
/* Try reading the number using `sysctl' first. */
if (__sysctl ((int *) sysctl_args,
sizeof (sysctl_args) / sizeof (sysctl_args[0]),
buf, &reslen, NULL, 0) < 0)
{
/* This was not successful. Now try reading the /proc
filesystem. */
int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY);
if (fd == -1
|| (reslen = __read (fd, buf, sizeof (buf))) <= 0)
/* This also didn't work. We give up since we cannot
make sure the library can actually work. */
__libc_fatal ("FATAL: cannot determine library version\n");
__close (fd);
}
buf[MIN (reslen, sizeof (buf) - 1)] = '\0';
/* 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 sufficent. */
__libc_fatal ("FATAL: kernel too old\n");
}
#ifndef SHARED
DL_SYSDEP_OSCHECK (__libc_fatal);
#endif
/* Set the FPU control word to the proper default value if the
kernel would use a different value. (In a static program we