1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #if defined(LIBC_SCCS) && !defined(lint) 8 static char sccsid[] = "@(#)herror.c 6.1 (Berkeley) 12/04/87"; 9 #endif LIBC_SCCS and not lint 10 11 #include <sys/types.h> 12 #include <sys/uio.h> 13 14 char *h_errlist[] = { 15 "Error 0", 16 "Unknown host", /* 1 HOST_NOT_FOUND */ 17 "Host name lookup failure", /* 2 TRY_AGAIN */ 18 "Unknown server error", /* 3 NO_RECOVERY */ 19 "No address associated with name", /* 4 NO_ADDRESS */ 20 }; 21 int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; 22 23 extern int h_errno; 24 25 /* 26 * herror -- 27 * print the error indicated by the h_errno value. 28 */ 29 herror(s) 30 char *s; 31 { 32 struct iovec iov[4]; 33 register struct iovec *v = iov; 34 35 if (s && *s) { 36 v->iov_base = s; 37 v->iov_len = strlen(s); 38 v++; 39 v->iov_base = ": "; 40 v->iov_len = 2; 41 v++; 42 } 43 v->iov_base = h_errno < h_nerr ? h_errlist[h_errno] : "Unknown error"; 44 v->iov_len = strlen(v->iov_base); 45 v++; 46 v->iov_base = "\n"; 47 v->iov_len = 1; 48 writev(2, iov, (v - iov) + 1); 49 } 50