*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
- *
adjusted by Erik Andersen <andersen@codepoet.org> to remove
+ *
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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//usage:#define hostname_trivial_usage
+//usage: "[OPTIONS] [HOSTNAME | -F FILE]"
+//usage:#define hostname_full_usage "\n\n"
+//usage: "Get or set hostname or DNS domain name\n"
+//usage: "\n -s Short"
+//usage: "\n -i Addresses for the hostname"
+//usage: "\n -d DNS domain name"
+//usage: "\n -f Fully qualified domain name"
+//usage: "\n -F FILE Use FILE's content as hostname"
+//usage:
+//usage:#define hostname_example_usage
+//usage: "$ hostname\n"
+//usage: "sage\n"
+//usage:
+//usage:#define dnsdomainname_trivial_usage NOUSAGE_STR
+//usage:#define dnsdomainname_full_usage ""
+
#include "libbb.h"
static void do_sethostname(char *s, int isfile)
{
- if (!s)
- return;
+// if (!s)
+// return;
if (isfile) {
parser_t *parser = config_open2(s, xfopen_for_read);
- while (config_read(parser, &s, 1, 1, "# \t", 0)) {
+ 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)) < 0) {
- if (errno == EPERM)
- bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+ } else if (sethostname(s, strlen(s))) {
+// if (errno == EPERM)
+// bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
bb_perror_msg_and_die("sethostname");
}
}
+/* Manpage circa 2009:
+ *
+ * hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [--long]
+ * [-i] [--ip-address] [-s] [--short] [-y] [--yp] [--nis]
+ *
+ * hostname [-v] [-F filename] [--file filename] / [hostname]
+ *
+ * domainname [-v] [-F filename] [--file filename] / [name]
+ * { bbox: not supported }
+ *
+ * nodename [-v] [-F filename] [--file filename] / [name]
+ * { bbox: not supported }
+ *
+ * dnsdomainname [-v]
+ * { bbox: supported: Linux kernel build needs this }
+ * nisdomainname [-v]
+ * { bbox: not supported }
+ * ypdomainname [-v]
+ * { bbox: not supported }
+ *
+ * -a, --alias
+ * Display the alias name of the host (if used).
+ * { bbox: not supported }
+ * -d, --domain
+ * Display the name of the DNS domain. Don't use the command
+ * domainname to get the DNS domain name because it will show the
+ * NIS domain name and not the DNS domain name. Use dnsdomainname
+ * instead.
+ * -f, --fqdn, --long
+ * Display the FQDN (Fully Qualified Domain Name). A FQDN consists
+ * of a short host name and the DNS domain name. Unless you are
+ * using bind or NIS for host lookups you can change the FQDN and
+ * the DNS domain name (which is part of the FQDN) in the
+ * /etc/hosts file.
+ * -i, --ip-address
+ * Display the IP address(es) of the host.
+ * -s, --short
+ * Display the short host name. This is the host name cut at the
+ * first dot.
+ * -v, --verbose
+ * Be verbose and tell what's going on.
+ * { bbox: supported but ignored }
+ * -y, --yp, --nis
+ * Display the NIS domain name. If a parameter is given (or --file
+ * name ) then root can also set a new NIS domain.
+ * { bbox: not supported }
+ * -F, --file filename
+ * Read the host name from the specified file. Comments (lines
+ * starting with a `#') are ignored.
+ */
int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int hostname_main(int argc, char **argv)
+int hostname_main(int argc UNUSED_PARAM, char **argv)
{
enum {
OPT_d = 0x1,
OPT_dfis = 0xf,
};
+ unsigned opts;
char *buf;
char *hostname_str;
- if (argc < 1)
- bb_show_usage();
+#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"
+ ;
- getopt32(argv, "dfisF:", &hostname_str);
+#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;
- /* Output in desired format */
- if (option_mask32 & OPT_dfis) {
+ if (opts & OPT_dfis) {
+ /* Cases when we need full hostname (or its part) */
struct hostent *hp;
char *p;
+
hp = xgethostbyname(buf);
- p = strchr(hp->h_name, '.');
- if (option_mask32 & OPT_f) {
+ p = strchrnul(hp->h_name, '.');
+ if (opts & OPT_f) {
puts(hp->h_name);
- } else if (option_mask32 & OPT_s) {
- if (p)
- *p = '\0';
+ } else if (opts & OPT_s) {
+ *p = '\0';
puts(hp->h_name);
- } else if (option_mask32 & OPT_d) {
- if (p)
+ } else if (opts & 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++)));
+ } 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');
}
- bb_putchar('\n');
}
- }
- /* Set the hostname */
- else if (option_mask32 & OPT_F) {
+ } 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);
- }
- /* Or if all else fails,
- * just print the current hostname */
- else {
+ } else {
+ /* Just print the current hostname */
puts(buf);
}
+
if (ENABLE_FEATURE_CLEAN_UP)
free(buf);
return EXIT_SUCCESS;
projects / oweals / busybox.git / blobdiff