1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)perror.c 5.8 (Berkeley) 04/09/89"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <sys/types.h> 23 #include <sys/uio.h> 24 25 perror(s) 26 char *s; 27 { 28 extern int errno; 29 register struct iovec *v; 30 struct iovec iov[4]; 31 char *strerror(); 32 33 v = iov; 34 if (s && *s) { 35 v->iov_base = s; 36 v->iov_len = strlen(s); 37 v++; 38 v->iov_base = ": "; 39 v->iov_len = 2; 40 v++; 41 } 42 v->iov_base = strerror(errno); 43 v->iov_len = strlen(v->iov_base); 44 v++; 45 v->iov_base = "\n"; 46 v->iov_len = 1; 47 (void)writev(2, iov, (v - iov) + 1); 48 } 49