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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/* vi: set sw=4 ts=4: */
/*
* Mini hostname implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
* adjusted by Erik Andersen <andersen@codepoet.org> to remove
* use of long options and GNU getopt. Improved the usage info.
*
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
static void do_sethostname(char *s, int isfile)
{
if (!s)
return;
if (isfile) {
parser_t *parser = config_open2(s, xfopen_for_read);
while (config_read(parser, &s, 1, 1, "# \t", 0)) {
do_sethostname(s, 0);
}
if (ENABLE_FEATURE_CLEAN_UP)
config_close(parser);
} else if (sethostname(s, strlen(s)) < 0) {
if (errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
bb_perror_msg_and_die("sethostname");
}
}
int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int hostname_main(int argc, char **argv)
{
enum {
OPT_d = 0x1,
OPT_f = 0x2,
OPT_i = 0x4,
OPT_s = 0x8,
OPT_F = 0x10,
OPT_dfis = 0xf,
};
char *buf;
char *hostname_str;
if (argc < 1)
bb_show_usage();
getopt32(argv, "dfisF:", &hostname_str);
argv += optind;
buf = safe_gethostname();
/* Output in desired format */
if (option_mask32 & OPT_dfis) {
struct hostent *hp;
char *p;
hp = xgethostbyname(buf);
p = strchr(hp->h_name, '.');
if (option_mask32 & OPT_f) {
puts(hp->h_name);
} else if (option_mask32 & OPT_s) {
if (p)
*p = '\0';
puts(hp->h_name);
} else if (option_mask32 & OPT_d) {
if (p)
puts(p + 1);
} else if (option_mask32 & OPT_i) {
while (hp->h_addr_list[0]) {
printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
}
bb_putchar('\n');
}
}
/* Set the hostname */
else if (option_mask32 & OPT_F) {
do_sethostname(hostname_str, 1);
} else if (argv[0]) {
do_sethostname(argv[0], 0);
}
/* Or if all else fails,
* just print the current hostname */
else {
puts(buf);
}
if (ENABLE_FEATURE_CLEAN_UP)
free(buf);
return EXIT_SUCCESS;
}
|
