1 files changed, 93 insertions, 0 deletions
diff --git a/networking/hostname.c b/networking/hostname.c
new file mode 100644
index 0000000..48e70db
--- /dev/null
+++ b/networking/hostname.c
@@ -0,0 +1,93 @@
+/* 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)
+{
+	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)) < 0) {
+		if (errno == EPERM)
+			bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+		bb_perror_msg_and_die("sethostname");
+	}
+}
+
+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 EXIT_SUCCESS;
+}