+/* vi: set sw=4 ts=4: */
/*
- * $Id: hostname.c,v 1.2 1999/12/08 04:13:44 andersen Exp $
+ * $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 <andersee@debian.org> to remove
+ * 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include "internal.h"
#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"
-static const char* hostname_usage =
-"hostname [OPTION] {hostname | -F file}\n\n"
-"Get or set the hostname or DNS domain name. If a hostname is given\n"
-"(or a file with the -F parameter), the host name will be set.\n\n"
-"Options:\n"
-"\t-s\t\tShort\n"
-"\t-i\t\tAddresses for the hostname\n"
-"\t-d\t\tDNS domain name\n"
-"\t-F file\tUse FILE to specify the hostname\n";
+extern char *optarg; /* in unistd.h */
+extern int optind, opterr, optopt; /* in unistd.h */
-
-void do_sethostname(char *s, int isfile)
+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)
- 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);
+ 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 {
- 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);
- }
+ 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_short = 0;
- int opt_domain = 0;
- int opt_ip = 0;
- struct hostent *h;
- char *filename = NULL;
- char buf[255];
- char *s = NULL;
-
- if (argc < 1) usage(hostname_usage);
+ int opt;
+ int type = 0;
+ struct hostent *hp;
+ char *filename = NULL;
+ char buf[255];
+ char *p = NULL;
+
+ if (argc < 1)
+ bb_show_usage();
- while (--argc > 0 && **(++argv) == '-') {
- while (*(++(*argv))) {
- switch (**argv) {
- case 's':
- opt_short = 1;
- break;
- case 'i':
- opt_ip = 1;
- break;
- case 'd':
- opt_domain = 1;
- break;
- case 'F':
- filename = optarg;
- if (--argc == 0) {
- usage(hostname_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();
}
- filename = *(++argv);
- break;
- default:
- usage(hostname_usage);
- }
- if (filename!=NULL)
- break;
}
- }
- if (argc >= 1) {
- do_sethostname(*argv, 0);
- } else if (filename!=NULL) {
- 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);
- }
- }
- exit( 0);
+ /* 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);
}
-
projects / oweals / busybox.git / blobdiff