11974Swnj /* 2*35303Sbostic * Copyright (c) 1988 Regents of the University of California. 3*35303Sbostic * All rights reserved. 4*35303Sbostic * 5*35303Sbostic * Redistribution and use in source and binary forms are permitted 6*35303Sbostic * provided that the above copyright notice and this paragraph are 7*35303Sbostic * duplicated in all such forms and that any documentation, 8*35303Sbostic * advertising materials, and other materials related to such 9*35303Sbostic * distribution and use acknowledge that the software was developed 10*35303Sbostic * by the University of California, Berkeley. The name of the 11*35303Sbostic * University may not be used to endorse or promote products derived 12*35303Sbostic * from this software without specific prior written permission. 13*35303Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14*35303Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15*35303Sbostic * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1621351Sdist */ 1721351Sdist 1826574Sdonn #if defined(LIBC_SCCS) && !defined(lint) 19*35303Sbostic static char sccsid[] = "@(#)perror.c 5.4 (Berkeley) 08/02/88"; 20*35303Sbostic #endif /* LIBC_SCCS and not lint */ 2121351Sdist 2213488Ssam #include <sys/types.h> 2313488Ssam #include <sys/uio.h> 241974Swnj 251974Swnj int errno; 2632293Sbostic extern int sys_nerr; 2732293Sbostic extern char *sys_errlist[]; 281974Swnj perror(s) 2913488Ssam char *s; 301974Swnj { 3113488Ssam struct iovec iov[4]; 3213488Ssam register struct iovec *v = iov; 331974Swnj 3413488Ssam if (s && *s) { 3513488Ssam v->iov_base = s; 3613488Ssam v->iov_len = strlen(s); 3713488Ssam v++; 3813488Ssam v->iov_base = ": "; 3913488Ssam v->iov_len = 2; 4013488Ssam v++; 411974Swnj } 4213488Ssam v->iov_base = errno < sys_nerr ? sys_errlist[errno] : "Unknown error"; 4313488Ssam v->iov_len = strlen(v->iov_base); 4413488Ssam v++; 4513488Ssam v->iov_base = "\n"; 4613488Ssam v->iov_len = 1; 47*35303Sbostic (void)writev(2, iov, (v - iov) + 1); 481974Swnj } 49