1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)herror.c 6.5 (Berkeley) 06/01/90"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <sys/uio.h> 14 15 char *h_errlist[] = { 16 "Error 0", 17 "Unknown host", /* 1 HOST_NOT_FOUND */ 18 "Host name lookup failure", /* 2 TRY_AGAIN */ 19 "Unknown server error", /* 3 NO_RECOVERY */ 20 "No address associated with name", /* 4 NO_ADDRESS */ 21 }; 22 int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; 23 24 extern int h_errno; 25 26 /* 27 * herror -- 28 * print the error indicated by the h_errno value. 29 */ 30 herror(s) 31 char *s; 32 { 33 struct iovec iov[4]; 34 register struct iovec *v = iov; 35 36 if (s && *s) { 37 v->iov_base = s; 38 v->iov_len = strlen(s); 39 v++; 40 v->iov_base = ": "; 41 v->iov_len = 2; 42 v++; 43 } 44 v->iov_base = (u_int)h_errno < h_nerr ? 45 h_errlist[h_errno] : "Unknown error"; 46 v->iov_len = strlen(v->iov_base); 47 v++; 48 v->iov_base = "\n"; 49 v->iov_len = 1; 50 writev(2, iov, (v - iov) + 1); 51 } 52