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)
bb_error_msg_and_die("you must be root to change the hostname");
else
bb_perror_msg_and_die("sethostname");
}
} else {
f = bb_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
}
}
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", PARSE_NORMAL & ~PARSE_GREEDY)) {
do_sethostname(s, 0);
}
if (ENABLE_FEATURE_CLEAN_UP)
config_close(parser);
} else if (sethostname(s, strlen(s))) {
// if (errno == EPERM)
// bb_error_msg_and_die("%s", bb_msg_perm_denied_are_you_root);
bb_perror_msg_and_die("sethostname");
}
}
int hostname_main(int argc UNUSED_PARAM, char **argv)
{
enum {
OPT_d = 0x1,
OPT_f = 0x2,
OPT_i = 0x4,
OPT_s = 0x8,
OPT_F = 0x10,
OPT_dfi = 0x7,
};
unsigned opts;
char *buf;
char *hostname_str;
#if ENABLE_LONG_OPTS
applet_long_options =
"domain\0" No_argument "d"
"fqdn\0" No_argument "f"
//Enable if seen in active use in some distro:
// "long\0" No_argument "f"
// "ip-address\0" No_argument "i"
// "short\0" No_argument "s"
// "verbose\0" No_argument "v"
"file\0" No_argument "F"
;
#endif
/* dnsdomainname from net-tools 1.60, hostname 1.100 (2001-04-14),
* supports hostname's options too (not just -v as manpage says) */
opts = getopt32(argv, "dfisF:v", &hostname_str);
argv += optind;
buf = safe_gethostname();
if (applet_name[0] == 'd') /* dnsdomainname? */
opts = OPT_d;
if (opts & OPT_dfi) {
/* Cases when we need full hostname (or its part) */
struct hostent *hp;
char *p;
hp = xgethostbyname(buf);
p = strchrnul(hp->h_name, '.');
if (opts & OPT_f) {
puts(hp->h_name);
} else if (opts & OPT_s) {
*p = '\0';
puts(hp->h_name);
} else if (opts & OPT_d) {
if (*p)
puts(p + 1);
} else /*if (opts & OPT_i)*/ {
if (hp->h_length == sizeof(struct in_addr)) {
struct in_addr **h_addr_list = (struct in_addr **)hp->h_addr_list;
while (*h_addr_list) {
printf(h_addr_list[1] ? "%s " : "%s", inet_ntoa(**h_addr_list));
h_addr_list++;
}
bb_putchar('\n');
}
}
} else if (opts & OPT_s) {
strchrnul(buf, '.')[0] = '\0';
puts(buf);
} else if (opts & OPT_F) {
/* Set the hostname */
do_sethostname(hostname_str, 1);
} else if (argv[0]) {
/* Set the hostname */
do_sethostname(argv[0], 0);
} else {
/* Just print the current hostname */
puts(buf);
}
if (ENABLE_FEATURE_CLEAN_UP)
free(buf);
return EXIT_SUCCESS;
}
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)
bb_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:
bb_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(hp->h_name);
} else if (type == 'd') {
if (p) puts(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);
}
int hostname_main(int argc, char **argv)
{
int opt_short = 0;
int opt_domain = 0;
int opt_ip = 0;
struct hostent *h;
char *filename = NULL;
char buf[255];
char *s = NULL;
if (argc < 1)
printf("%% Incomplete command\r\n");
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) {
printf("%% Incomplete command\r\n");
}
filename = *(++argv);
break;
case '-':
if (strcmp(++(*argv), "file") || --argc ==0 ) {
printf("%% Incomplete command\r\n");
}
filename = *(++argv);
break;
default:
printf("%% Incomplete command\r\n");
}
if (filename != NULL)
break;
}
}
if (argc >= 1) {
do_sethostname(*argv, 0);
} else if (filename != NULL) {
do_sethostname(filename, 1);
} else {
gethostname(buf, 255);
if (opt_short) {
s = strchr(buf, '.');
if (!s)
s = buf;
*s = 0;
printf("%s", buf);
} else if (opt_domain) {
s = strchr(buf, '.');
printf("%s", (s ? s + 1 : ""));
} else if (opt_ip) {
h = gethostbyname(buf);
if (!h) {
printf("%% Host not found\n");
return(-1);
}
printf("%s", inet_ntoa(*(struct in_addr *) (h->h_addr)));
} else {
printf("%s", buf);
}
}
return(0);
}
