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