mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 11:00:07 +00:00
b4246fd63d
2000-08-23 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/dl-osinfo.h: Include "kernel-features.h", otherwise __LINUX_KERNEL_VERSION might not be defined. (MIN): Define if not already defined.
110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/* Operating system specific code for generic dynamic loader functions.
|
|
Copyright (C) 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <sys/sysctl.h>
|
|
#include "kernel-features.h"
|
|
|
|
#ifndef MIN
|
|
# define MIN(a,b) (((a)<(b))?(a):(b))
|
|
#endif
|
|
|
|
/* There is no prototype for __sysctl in that file. */
|
|
extern int __sysctl (int *name, int nlen, void *oldval,
|
|
size_t *oldlenp, void *newval, size_t newlen);
|
|
|
|
|
|
#ifdef SHARED
|
|
/* This is the function used in the dynamic linker to print the fatal error
|
|
message. */
|
|
static inline void
|
|
__attribute__ ((__noreturn__))
|
|
dl_fatal (const char *str)
|
|
{
|
|
_dl_sysdep_output (2, str, NULL);
|
|
_exit (1);
|
|
}
|
|
#endif
|
|
|
|
|
|
#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) \
|
|
{ \
|
|
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. */ \
|
|
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. */ \
|
|
FATAL ("FATAL: kernel too old\n"); \
|
|
} \
|
|
} while (0)
|