strerror.c

来自「非常优秀的linux嵌入式http服务器」· C语言 代码 · 共 39 行

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strerror.c  5.1 (Berkeley) 4/9/89";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <stdio.h>

char *
strerror(errnum)
	int errnum;
{
	extern int sys_nerr;
	extern char *sys_errlist[];
	static char ebuf[20];

	if ((unsigned int)errnum < sys_nerr)
		return(sys_errlist[errnum]);
	(void)sprintf(ebuf, "Unknown error: %d", errnum);
	return(ebuf);
}