lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 1987 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: (1) source distributions retain this entire copyright |
| 7 | * notice and comment, and (2) distributions including binaries display |
| 8 | * the following acknowledgement: ``This product includes software |
| 9 | * developed by the University of California, Berkeley and its contributors'' |
| 10 | * in the documentation or other materials provided with the distribution |
| 11 | * and in all advertising materials mentioning features or use of this |
| 12 | * software. Neither the name of the University nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | */ |
| 19 | |
| 20 | #define __FORCE_GLIBC |
| 21 | #include <features.h> |
| 22 | #include <stdio.h> |
| 23 | #include <string.h> |
| 24 | #include <netdb.h> |
| 25 | |
| 26 | |
| 27 | static const char error_msg[] = "Resolver error"; |
| 28 | static const char *const h_errlist[] = { |
| 29 | "Error 0", |
| 30 | "Unknown host", /* 1 HOST_NOT_FOUND */ |
| 31 | "Host name lookup failure", /* 2 TRY_AGAIN */ |
| 32 | "Unknown server error", /* 3 NO_RECOVERY */ |
| 33 | "No address associated with name", /* 4 NO_ADDRESS */ |
| 34 | }; |
| 35 | static const int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; |
| 36 | |
| 37 | /* |
| 38 | * herror -- print the error indicated by the h_errno value. |
| 39 | */ |
| 40 | void herror(const char *s) |
| 41 | { |
| 42 | static const char colon_space[] = ": "; |
| 43 | const char *p; |
| 44 | const char *c; |
| 45 | |
| 46 | c = colon_space; |
| 47 | if (!s || !*s) { |
| 48 | c += 2; |
| 49 | } |
| 50 | p = error_msg; |
| 51 | if ((h_errno >= 0) && (h_errno < h_nerr)) { |
| 52 | p = h_errlist[h_errno]; |
| 53 | } |
| 54 | fprintf(stderr, "%s%s%s\n", s, c, p); |
| 55 | } |
| 56 | libc_hidden_def(herror) |
| 57 | |
| 58 | |
| 59 | const char *hstrerror(int err) |
| 60 | { |
| 61 | if ((unsigned)err < h_nerr) |
| 62 | return(h_errlist[err]); |
| 63 | |
| 64 | return error_msg; |
| 65 | } |