/* * Copyright (c) 1987 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. Neither the name of the University nor the names of its * contributors may 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #define __FORCE_GLIBC #include <features.h> #include <stdio.h> #include <string.h> #include <netdb.h> static const char *error_msg = "Resolver error"; static const char *const h_errlist[] = { "Error 0", "Unknown host", /* 1 HOST_NOT_FOUND */ "Host name lookup failure", /* 2 TRY_AGAIN */ "Unknown server error", /* 3 NO_RECOVERY */ "No address associated with name", /* 4 NO_ADDRESS */ }; static const int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; /* * herror -- print the error indicated by the h_errno value. */ void herror(const char *s) { static const char colon_space[] = ": "; const char *p; const char *c; c = colon_space; if (!s || !*s) { c += 2; } p = error_msg; if ((h_errno >= 0) && (h_errno < h_nerr)) { p = h_errlist[h_errno]; } fprintf(stderr, "%s%s%s\n", s, c, p); } const char *hstrerror(int err) { if (err < 0) { return(error_msg); } else if (err < h_nerr) { return(h_errlist[err]); } return(error_msg); }