Stuf

1 files changed, 126 insertions, 0 deletions

diff --git a/hostname.c b/hostname.c
new file mode 100644
index 0000000..27f2800
--- /dev/null
+++ b/hostname.c
@@ -0,0 +1,126 @@
+/*
+ * $Id: hostname.c,v 1.1 1999/12/07 23:14:59 andersen Exp $
+ * Mini hostname implementation for busybox
+ *
+ * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
+ *
+ * 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 "internal.h"
+#include <errno.h>
+#include <getopt.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <stdio.h>
+
+static const char* hostname_usage = "hostname [OPTION] {hostname | -F file}\n\n"
+"Options:\n"
+"\t-s, --short\t\tshort\n"
+"\t-i, --ip-address\t\taddresses for the hostname\n"
+"\t-d, --domain\t\tDNS domain name\n"
+"If a hostname is given, or a file is given with the -F parameter, the host\n"
+"name will be set\n";
+
+static char short_opts[] = "sidF:";
+static const struct option long_opts[] = {
+    { "short", no_argument, NULL, 's' },
+    { "ip-address", no_argument, NULL, 'i' },
+    { "domain", no_argument, NULL, 'd' },
+    { NULL, 0, NULL, 0 }
+};
+
+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) 
+	        fprintf(stderr, "hostname: you must be root to change the hostname\n");
+	    else	  	
+	        perror("sethostname");
+	    exit(1);
+	}	
+    } else {
+        if ((f = fopen(s, "r")) == NULL) {
+	    perror(s);
+	    exit(1);
+	} else {
+            fgets(buf, 255, f);
+	    fclose(f);
+	    if (buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = 0;
+	    if (sethostname(buf, strlen(buf)) < 0) {
+	       perror("sethostname");
+	       exit(1);
+	    }
+	}
+    }	
+}
+
+int hostname_main(int argc, char **argv)
+{
+    int c;
+    int opt_short = 0;
+    int opt_domain = 0;
+    int opt_ip = 0;
+    int opt_file = 0;
+    struct hostent *h;
+    char *filename = NULL;
+    char buf[255];
+    char *s = NULL;
+    
+    if (argc < 1) usage(hostname_usage);
+
+    while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
+        switch (c) {
+          case 's': opt_short = 1; break;
+	  case 'i': opt_ip = 1; break;
+	  case 'd': opt_domain = 1; break;
+          case 'F': opt_file = 1; filename = optarg; break;
+	  default: usage(hostname_usage);		    
+        }
+    }
+
+    if (optind < argc) {
+	do_sethostname(argv[optind], 0);
+    } else if (opt_file) {
+        do_sethostname(filename, 1);
+    } else {
+	gethostname(buf, 255);
+        if (opt_short) {
+            s = strchr(buf, '.');
+	    if (!s) s = buf; *s = 0;
+	    printf("%s\n", buf);
+	} else if (opt_domain) {
+	    s = strchr(buf, '.');
+	    printf("%s\n", (s ? s+1 : ""));
+        } else if (opt_ip) {
+	    h = gethostbyname(buf);
+	    if (!h) {
+	        printf("Host not found\n");
+		exit(1);
+	    }
+	    printf("%s\n", inet_ntoa(*(struct in_addr *)(h->h_addr)));
+        } else {
+	  printf("%s\n", buf);
+        }
+    }
+    return 0;
+}
+