1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* 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>
libc_hidden_proto(fprintf)
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);
}
libc_hidden_proto(herror)
libc_hidden_def(herror)
const char *hstrerror(int err)
{
if (err < 0) {
return(error_msg);
} else if (err < h_nerr) {
return(h_errlist[err]);
}
return(error_msg);
}
|
