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/* vi: set sw=4 ts=4: */
/*
* Mini hostname implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
* adjusted by Erik Andersen <andersen@codepoet.org> to remove
* use of long options and GNU getopt. Improved the usage info.
*
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
static void do_sethostname(char *s, int isfile)
{
FILE *f;
if (!s)
return;
if (!isfile) {
if (sethostname(s, strlen(s)) < 0) {
if (errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
bb_perror_msg_and_die("sethostname");
}
} else {
f = xfopen(s, "r");
#define strbuf bb_common_bufsiz1
while (fgets(strbuf, sizeof(strbuf), f) != NULL) {
if (strbuf[0] == '#') {
continue;
}
chomp(strbuf);
do_sethostname(strbuf, 0);
}
if (ENABLE_FEATURE_CLEAN_UP)
fclose(f);
}
}
int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int hostname_main(int argc, char **argv)
{
enum {
OPT_d = 0x1,
OPT_f = 0x2,
OPT_i = 0x4,
OPT_s = 0x8,
OPT_F = 0x10,
OPT_dfis = 0xf,
};
char *buf;
char *hostname_str;
if (argc < 1)
bb_show_usage();
getopt32(argv, "dfisF:", &hostname_str);
argv += optind;
buf = safe_gethostname();
/* Output in desired format */
if (option_mask32 & OPT_dfis) {
struct hostent *hp;
char *p;
hp = xgethostbyname(buf);
p = strchr(hp->h_name, '.');
if (option_mask32 & OPT_f) {
puts(hp->h_name);
} else if (option_mask32 & OPT_s) {
if (p)
*p = '\0';
puts(hp->h_name);
} else if (option_mask32 & OPT_d) {
if (p)
puts(p + 1);
} else if (option_mask32 & OPT_i) {
while (hp->h_addr_list[0]) {
printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
}
bb_putchar('\n');
}
}
/* Set the hostname */
else if (option_mask32 & OPT_F) {
do_sethostname(hostname_str, 1);
} else if (argv[0]) {
do_sethostname(argv[0], 0);
}
/* Or if all else fails,
* just print the current hostname */
else {
puts(buf);
}
if (ENABLE_FEATURE_CLEAN_UP)
free(buf);
return 0;
}
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