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- /*
- * 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[] = "@(#)perror.c 5.7 (Berkeley) 12/16/88";
- #endif /* LIBC_SCCS and not lint */
-
- #include <sys/types.h>
- #include <sys/uio.h>
-
- int errno;
- extern int sys_nerr;
- extern char *sys_errlist[];
-
- static char ebuf[20];
-
- perror(s)
- char *s;
- {
- struct iovec iov[4];
- register struct iovec *v = iov;
-
- if (s && *s) {
- v->iov_base = s;
- v->iov_len = strlen(s);
- v++;
- v->iov_base = ": ";
- v->iov_len = 2;
- v++;
- }
- if ((u_int)errno < sys_nerr)
- v->iov_base = sys_errlist[errno];
- else {
- (void)sprintf(ebuf, "Unknown error: %d", errno);
- v->iov_base = ebuf;
- }
- v->iov_len = strlen(v->iov_base);
- v++;
- v->iov_base = "\n";
- v->iov_len = 1;
- (void)writev(2, iov, (v - iov) + 1);
- }
-
- char *
- strerror(errnum)
- int errnum;
- {
- if ((u_int)errnum < sys_nerr)
- return(sys_errlist[errnum]);
- (void)sprintf(ebuf, "Unknown error: %d", errnum);
- return(ebuf);
- }
-