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/* Copyright 1998 by Andi Kleen. Subject to the GPL. */
/* $Id: util.c,v 1.4 1998/11/17 15:17:02 freitag Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/utsname.h>
#include <unistd.h>
#include "util.h"
static void oom(void)
{
fprintf(stderr, "out of virtual memory\n");
exit(2);
}
void *xmalloc(size_t sz)
{
void *p = calloc(sz, 1);
if (!p)
oom();
return p;
}
/* Like strdup, but oom() instead of NULL */
char *xstrdup(const char *s)
{
char *d = strdup(s);
if (!d)
oom();
return d;
}
void *xrealloc(void *oldp, size_t sz)
{
void *p = realloc(oldp, sz);
if (!p)
oom();
return p;
}
int kernel_version(void)
{
struct utsname uts;
int major, minor, patch=0;
if (uname(&uts) < 0)
return -1;
if (sscanf(uts.release, "%d.%d.%d", &major, &minor, &patch) < 2)
return -1;
return KRELEASE(major, minor, patch);
}
long ticks_per_second(void)
{
return sysconf(_SC_CLK_TCK);
}
/* Like strncpy but make sure the resulting string is always 0 terminated. */
char *safe_strncpy(char *dst, const char *src, size_t size)
{
dst[size-1] = '\0';
return strncpy(dst,src,size-1);
}
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