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/* Copyright 1998 by Andi Kleen. Subject to the GPL. */

/* $Id: util.c,v 1.1 2002-03-17 19:58:53 simons Exp $ */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/utsname.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;

}

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;

    if (uname(&uts) < 0)

        return -1;

    if (sscanf(uts.release, "%d.%d.%d", &major, &minor, &patch) != 3)

        return -1;

    return KRELEASE(major, minor, patch);

}

/* 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);

}