mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
3d61b10595
- Switched to getopt argument parsing
- Added -f option to get fully qualified domain name
- Fixed the -s (short) and -d (domain) options, which were not
doing a gethostbyname lookup to get the FQDN before trying to
separate the local and domain portions of the hostname.
- Fixed probem with 'agressive setting' of the hostname...the
previous busybox version would try to set the hostname if called
with a non-option argument, or the -F option, even if another
option (like -i or -s) was given. This behavior does not match
the net-tools hostname, which does not attempt to set anything if
given a 'display' option, regardless of the presence/absence of
the -F option or additional command line arguments.
- When using a file to set the hostname, behavior now matches
net-tools version...previous busybox version did not handle
comments, and simply grabbed the first line from the file.
131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* $Id: hostname.c,v 1.32 2001/10/31 09:59:57 andersen Exp $
|
|
* Mini hostname implementation for busybox
|
|
*
|
|
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
|
|
*
|
|
* adjusted by Erik Andersen <andersee@debian.org> to remove
|
|
* use of long options and GNU getopt. Improved the usage info.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <getopt.h>
|
|
#include "busybox.h"
|
|
|
|
extern char *optarg; /* in unistd.h */
|
|
extern int optind, opterr, optopt; /* in unistd.h */
|
|
|
|
static void do_sethostname(char *s, int isfile)
|
|
{
|
|
FILE *f;
|
|
char buf[255];
|
|
|
|
if (!s)
|
|
return;
|
|
if (!isfile) {
|
|
if (sethostname(s, strlen(s)) < 0) {
|
|
if (errno == EPERM)
|
|
error_msg_and_die("you must be root to change the hostname");
|
|
else
|
|
perror_msg_and_die("sethostname");
|
|
}
|
|
} else {
|
|
f = xfopen(s, "r");
|
|
while (fgets(buf, 255, f) != NULL) {
|
|
if (buf[0] =='#') {
|
|
continue;
|
|
}
|
|
chomp(buf);
|
|
do_sethostname(buf, 0);
|
|
}
|
|
#ifdef CONFIG_FEATURE_CLEAN_UP
|
|
fclose(f);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
int hostname_main(int argc, char **argv)
|
|
{
|
|
int opt;
|
|
int type = 0;
|
|
struct hostent *hp;
|
|
char *filename = NULL;
|
|
char buf[255];
|
|
char *p = NULL;
|
|
|
|
if (argc < 1)
|
|
show_usage();
|
|
|
|
while ((opt = getopt(argc, argv, "dfisF:")) > 0) {
|
|
switch (opt) {
|
|
case 'd':
|
|
case 'f':
|
|
case 'i':
|
|
case 's':
|
|
type = opt;
|
|
break;
|
|
case 'F':
|
|
filename = optarg;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
}
|
|
|
|
/* Output in desired format */
|
|
if (type != 0) {
|
|
gethostname(buf, 255);
|
|
hp = xgethostbyname(buf);
|
|
p = strchr(hp->h_name, '.');
|
|
if (type == 'f') {
|
|
puts(hp->h_name);
|
|
} else if (type == 's') {
|
|
if (p != NULL) {
|
|
*p = 0;
|
|
}
|
|
puts(buf);
|
|
} else if (type == 'd') {
|
|
puts(p ? p + 1 : "");
|
|
} else if (type == 'i') {
|
|
while (hp->h_addr_list[0]) {
|
|
printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
/* Set the hostname */
|
|
else if (filename != NULL) {
|
|
do_sethostname(filename, 1);
|
|
} else if (optind < argc) {
|
|
do_sethostname(argv[optind], 0);
|
|
}
|
|
/* Or if all else fails,
|
|
* just print the current hostname */
|
|
else {
|
|
gethostname(buf, 255);
|
|
puts(buf);
|
|
}
|
|
return(0);
|
|
}
|