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Major cleanup from Charles Steinkuehler <charles@steinkuehler.net>:

Browse Source 
- 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.
This commit is contained in:
Eric Andersen 2001-10-31 09:59:57 +00:00
parent 950d8b496f
commit 3d61b10595
1 changed files with 58 additions and 56 deletions
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114
networking/hostname.c
View File

@ -1,6 +1,6 @@
/* vi: set sw=4 ts=4: */
/*
* $Id: hostname.c,v 1.31 2001/10/24 04:59:56 andersen Exp $
* $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>
@ -30,8 +30,12 @@
#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;
@ -48,81 +52,79 @@ static void do_sethostname(char *s, int isfile)
}
} else {
f = xfopen(s, "r");
fgets(buf, 255, f);
while (fgets(buf, 255, f) != NULL) {
if (buf[0] =='#') {
continue;
}
chomp(buf);
do_sethostname(buf, 0);
}
#ifdef CONFIG_FEATURE_CLEAN_UP
fclose(f);
#endif
chomp(buf);
do_sethostname(buf, 0);
}
}
int hostname_main(int argc, char **argv)
{
int opt_short = 0;
int opt_domain = 0;
int opt_ip = 0;
struct hostent *h;
int opt;
int type = 0;
struct hostent *hp;
char *filename = NULL;
char buf[255];
char *s = NULL;
char *p = NULL;
if (argc < 1)
show_usage();
while (--argc > 0 && **(++argv) == '-') {
while (*(++(*argv))) {
switch (**argv) {
case 's':
opt_short = 1;
break;
case 'i':
opt_ip = 1;
break;
case 'd':
opt_domain = 1;
break;
case 'F':
if (--argc == 0) {
show_usage();
}
filename = *(++argv);
break;
case '-':
if (strcmp(++(*argv), "file") || --argc ==0 ) {
show_usage();
}
filename = *(++argv);
break;
default:
show_usage();
}
if (filename != NULL)
break;
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();
}
}
if (argc >= 1) {
do_sethostname(*argv, 0);
} else if (filename != NULL) {
do_sethostname(filename, 1);
} else {
/* Output in desired format */
if (type != 0) {
gethostname(buf, 255);
if (opt_short) {
s = strchr(buf, '.');
if (!s)
s = buf;
*s = 0;
puts(buf);
} else if (opt_domain) {
s = strchr(buf, '.');
puts(s ? s + 1 : "");
} else if (opt_ip) {
h = xgethostbyname(buf);
puts(inet_ntoa(*(struct in_addr *) (h->h_addr)));
} else {
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);
}