static void setfilename(char *name, int what)
{
register FILE *fd;
register char *p;
char fline[MAXHOSTNAMELEN];
if ((fd = fopen(name, "r")) != NULL) {
while (fgets(fline, sizeof(fline), fd) != NULL) {
if ((p = index(fline, '\n')) != NULL)
*p = '\0';
if (opt_v)
fprintf(stderr, ">> %s\n", fline);
if (fline[0] == '#')
continue;
switch(what) {
case SETHOST:
sethname(fline);
break;
case SETDOMAIN:
setdname(fline);
break;
#if HAVE_AFDECnet
case SETNODE:
setnname(fline);
break;
#endif /* HAVE_AFDECnet */
}
}
(void) fclose(fd);
} else {
fprintf(stderr, _("%s: can't open `%s'\n"),
program_name, name);
exit(1);
}
}
int main(int argc, char **argv)
{
int c;
char type = '\0';
int option_index = 0;
int what = 0;
char myname[MAXHOSTNAMELEN + 1] =
{0};
char *file = NULL;
static const struct option long_options[] =
{
{"domain", no_argument, 0, 'd'},
{"file", required_argument, 0, 'F'},
{"fqdn", no_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
{"long", no_argument, 0, 'f'},
{"short", no_argument, 0, 's'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
{"alias", no_argument, 0, 'a'},
{"ip-address", no_argument, 0, 'i'},
{"nis", no_argument, 0, 'y'},
{"yp", no_argument, 0, 'y'},
#if HAVE_AFDECnet
{"node", no_argument, 0, 'n'},
#endif /* HAVE_AFDECnet */
{0, 0, 0, 0}
};
#if I18N
setlocale (LC_ALL, "");
bindtextdomain("net-tools", "/usr/share/locale");
textdomain("net-tools");
#endif
program_name = (rindex(argv[0], '/')) ? rindex(argv[0], '/') + 1 : argv[0];
if (!strcmp(program_name, "ypdomainname") ||
!strcmp(program_name, "domainname") ||
!strcmp(program_name, "nisdomainname"))
what = 3;
if (!strcmp(program_name, "dnsdomainname"))
what = 2;
#if HAVE_AFDECnet
if (!strcmp(program_name, "nodename"))
what = 4;
#endif /* HAVE_AFDECnet */
while ((c = getopt_long(argc, argv, "adfF:h?isVvyn", long_options, &option_index)) != EOF)
switch (c) {
case 'd':
what = 2;
break;
case 'a':
case 'f':
case 'i':
case 's':
what = 1;
type = c;
break;
case 'y':
what = 3;
break;
#if HAVE_AFDECnet
case 'n':
what = 4;
break;
#endif /* HAVE_AFDECnet */
case 'F':
file = optarg;
break;
case 'v':
opt_v++;
break;
case 'V':
version();
break; // not reached
case '?':
case 'h':
default:
usage();
break; // not reached
};
switch (what) {
case 2:
if (file || (optind < argc)) {
fprintf(stderr, _("%s: You can't change the DNS domain name with this command\n"), program_name);
fprintf(stderr, _("\nUnless you are using bind or NIS for host lookups you can change the DNS\n"));
fprintf(stderr, _("domain name (which is part of the FQDN) in the /etc/hosts file.\n"));
exit(1);
}
type = 'd';
/* NOBREAK */
case 0:
if (file) {
setfilename(file, SETHOST);
break;
}
if (optind < argc) {
sethname(argv[optind]);
break;
}
case 1:
gethostname(myname, sizeof(myname));
if (opt_v)
fprintf(stderr, _("gethostname()=`%s'\n"), myname);
if (!type)
printf("%s\n", myname);
else
showhname(myname, type);
break;
case 3:
if (file) {
setfilename(file, SETDOMAIN);
break;
}
if (optind < argc) {
setdname(argv[optind]);
break;
}
if (getdomainname(myname, sizeof(myname)) < 0) {
perror("getdomainname()");
exit(1);
}
if (opt_v)
fprintf(stderr, _("getdomainname()=`%s'\n"), myname);
printf("%s\n", myname);
break;
#if HAVE_AFDECnet
case 4:
if (file) {
setfilename(file, SETNODE);
break;
}
if (optind < argc) {
setnname(argv[optind]);
break;
}
getnodename(myname, sizeof(myname));
if (opt_v)
fprintf(stderr, _("getnodename()=`%s'\n"), myname);
printf("%s\n", myname);
break;
#endif /* HAVE_AFDECnet */
}
exit(0);
}
static void setnname(char *nname)
{
if (opt_v)
fprintf(stderr, _("Setting nodename to `%s'\n"),
nname);
if (setnodename(nname, strlen(nname))) {
switch(errno) {
case EPERM:
fprintf(stderr, _("%s: you must be root to change the node name\n"), program_name);
break;
case EINVAL:
fprintf(stderr, _("%s: name too long\n"), program_name);
break;
default:
}
exit(1);
}
}
#endif /* HAVE_AFDECnet */
static void sethname(char *hname)
{
if (opt_v)
fprintf(stderr, _("Setting hostname to `%s'\n"),
hname);
if (sethostname(hname, strlen(hname))) {
switch (errno) {
case EPERM:
fprintf(stderr, _("%s: you must be root to change the host name\n"), program_name);
break;
case EINVAL:
fprintf(stderr, _("%s: name too long\n"), program_name);
break;
default:
break;
}
exit(1);
};
}
static void setdname(char *dname)
{
if (opt_v)
fprintf(stderr, _("Setting domainname to `%s'\n"),
dname);
if (setdomainname(dname, strlen(dname))) {
switch (errno) {
case EPERM:
fprintf(stderr, _("%s: you must be root to change the domain name\n"), program_name);
break;
case EINVAL:
fprintf(stderr, _("%s: name too long\n"), program_name);
break;
default:
break;
}
exit(1);
};
}
static void showhname(char *hname, int c)
{
struct hostent *hp;
register char *p, **alias;
struct in_addr **ip;
if (opt_v)
fprintf(stderr, _("Resolving `%s' ...\n"), hname);
if (!(hp = gethostbyname(hname))) {
herror(program_name);
exit(1);
}
if (opt_v) {
fprintf(stderr, _("Result: h_name=`%s'\n"),
hp->h_name);
alias = hp->h_aliases;
while (alias[0])
fprintf(stderr, _("Result: h_aliases=`%s'\n"),
*alias++);
ip = (struct in_addr **) hp->h_addr_list;
while (ip[0])
fprintf(stderr, _("Result: h_addr_list=`%s'\n"),
inet_ntoa(**ip++));
}
if (!(p = strchr(hp->h_name, '.')) && (c == 'd'))
return;
switch (c) {
case 'a':
while (hp->h_aliases[0])
printf("%s ", *hp->h_aliases++);
printf("\n");
break;
case 'i':
while (hp->h_addr_list[0])
printf("%s ", inet_ntoa(*(struct in_addr *) *hp->h_addr_list++));
printf("\n");
break;
case 'd':
printf("%s\n", ++p);
break;
case 'f':
printf("%s\n", hp->h_name);
break;
case 's':
if (p != NULL)
*p = '\0';
printf("%s\n", hp->h_name);
break;
default:
break;
}
}
static void setfilename(char *name, int what)
{
register FILE *fd;
register char *p;
char fline[MAXHOSTNAMELEN];
if ((fd = fopen(name, "r")) != NULL) {
while (fgets(fline, sizeof(fline), fd) != NULL) {
if ((p = index(fline, '\n')) != NULL)
*p = '\0';
if (opt_v)
fprintf(stderr, ">> %s\n", fline);
if (fline[0] == '#')
continue;
switch(what) {
case SETHOST:
sethname(fline);
break;
case SETDOMAIN:
setdname(fline);
break;
#if HAVE_AFDECnet
case SETNODE:
setnname(fline);
break;
#endif /* HAVE_AFDECnet */
}
}
(void) fclose(fd);
} else {
fprintf(stderr, _("%s: can't open `%s'\n"),
program_name, name);
exit(1);
}
}
static void version(void)
{
fprintf(stderr, "%s\n%s\n", Release, Version);
exit(5); /* E_VERSION */
}