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gerrit.nordix.org / codeaurora / busybox / f07fe62d899b964dac7941660c56c5451ae2e594 / . / networking / hostname.c
blob: 6975b2b307250a07431702ae9be02304d80b4f7d [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]1/* vi: set sw=4 ts=4: */
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]2/*
Eric Andersencb81e642003-07-14 21:21:08 +0000[diff] [blame]3 * $Id: hostname.c,v 1.36 2003/07/14 21:21:01 andersen Exp $
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]4 * Mini hostname implementation for busybox
5 *
6 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
7 *
Eric Andersencb81e642003-07-14 21:21:08 +0000[diff] [blame]8 * adjusted by Erik Andersen <andersen@codepoet.org> to remove
Eric Andersend29edf31999-12-08 04:13:44 +0000[diff] [blame]9 * use of long options and GNU getopt. Improved the usage info.
10 *
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]11 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"Robert P. J. Day"2819f752006-07-11 11:32:31 +0000[diff] [blame]12 *
13 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]14 */
15
Eric Andersene0c07572001-06-23 13:49:14 +0000[diff] [blame]16#include "busybox.h"
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]17
Eric Andersen3e6ff902001-03-09 21:24:12 +0000[diff] [blame]18static void do_sethostname(char *s, int isfile)
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]19{
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]20 FILE *f;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]21
22 if (!s)
23 return;
24 if (!isfile) {
25 if (sethostname(s, strlen(s)) < 0) {
26 if (errno == EPERM)
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]27 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]28 else
Manuel Novoa III cad53642003-03-19 09:13:01 +0000[diff] [blame]29 bb_perror_msg_and_die("sethostname");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]30 }
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]31 } else {
Rob Landleyd921b2e2006-08-03 15:41:12 +0000[diff] [blame]32 f = xfopen(s, "r");
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]33 while (fgets(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), f) != NULL) {
34 if (bb_common_bufsiz1[0] == '#') {
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]35 continue;
36 }
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]37 chomp(bb_common_bufsiz1);
38 do_sethostname(bb_common_bufsiz1, 0);
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]39 }
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]40 if (ENABLE_FEATURE_CLEAN_UP)
41 fclose(f);
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]42 }
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]43}
44
45int hostname_main(int argc, char **argv)
46{
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]47 enum {
48 OPT_d = 0x1,
49 OPT_f = 0x2,
50 OPT_i = 0x4,
51 OPT_s = 0x8,
52 OPT_dfis = 0xf,
53 };
54
55 char buf[256];
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]56 char *hostname_str = NULL;
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]57
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]58 if (argc < 1)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000[diff] [blame]59 bb_show_usage();
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]60
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]61 getopt32(argc, argv, "dfisF:", &hostname_str);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]62
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]63 /* Output in desired format */
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]64 if (option_mask32 & OPT_dfis) {
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]65 struct hostent *hp;
66 char *p;
67 gethostname(buf, sizeof(buf));
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]68 hp = xgethostbyname(buf);
69 p = strchr(hp->h_name, '.');
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]70 if (option_mask32 & OPT_f) {
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]71 puts(hp->h_name);
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]72 } else if (option_mask32 & OPT_s) {
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]73 if (p != NULL) {
74 *p = 0;
75 }
Glenn L McGrath3ff3f4a2002-11-10 22:07:48 +0000[diff] [blame]76 puts(hp->h_name);
Bernhard Reutner-Fischerf07fe622007-01-09 10:06:19 +0000[diff] [blame^]77 } else if (option_mask32 & OPT_d) {
78 if (p)
79 puts(p + 1);
80 } else if (option_mask32 & OPT_i) {
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]81 while (hp->h_addr_list[0]) {
82 printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
83 }
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]84 puts("");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000[diff] [blame]85 }
86 }
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]87 /* Set the hostname */
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]88 else if (hostname_str != NULL) {
89 do_sethostname(hostname_str, 1);
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]90 } else if (optind < argc) {
91 do_sethostname(argv[optind], 0);
92 }
93 /* Or if all else fails,
94 * just print the current hostname */
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]95 else {
96 gethostname(buf, sizeof(buf));
Eric Andersen3d61b102001-10-31 09:59:57 +0000[diff] [blame]97 puts(buf);
98 }
Denis Vlasenko8514fc52006-09-22 08:53:14 +0000[diff] [blame]99 return 0;
Eric Andersen485b9551999-12-07 23:14:59 +0000[diff] [blame]100}