1 files changed, 130 insertions, 0 deletions

diff --git a/busybox/networking/hostname.c b/busybox/networking/hostname.c
new file mode 100644
index 000000000..a00263d8f
--- /dev/null
+++ b/busybox/networking/hostname.c
@@ -0,0 +1,130 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * $Id: hostname.c,v 1.36 2003/07/14 21:21:01 andersen Exp $
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <errno.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include "busybox.h"
+
+extern char *optarg; /* in unistd.h */
+extern int  optind, opterr, optopt; /* in unistd.h */
+
+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
+        }
+}
+
+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);
+}