diff options
Diffstat (limited to 'release/src/router/busybox/hostname.c')
-rw-r--r-- | release/src/router/busybox/hostname.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/release/src/router/busybox/hostname.c b/release/src/router/busybox/hostname.c new file mode 100644 index 00000000..a09d9560 --- /dev/null +++ b/release/src/router/busybox/hostname.c @@ -0,0 +1,128 @@ +/* vi: set sw=4 ts=4: */ +/* + * $Id: hostname.c,v 1.1.1.4 2003/10/14 08:09:38 sparq Exp $ + * Mini hostname implementation for busybox + * + * Copyright (C) 1999 by Randolph Chung <tausq@debian.org> + * + * adjusted by Erik Andersen <andersee@debian.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 "busybox.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) + error_msg_and_die("you must be root to change the hostname"); + else + perror_msg_and_die("sethostname"); + } + } else { + f = xfopen(s, "r"); + fgets(buf, 255, f); +#ifdef BB_FEATURE_CLEAN_UP + fclose(f); +#endif + chomp(buf); + do_sethostname(buf, 0); + } +} + +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) + 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': + if (--argc == 0) { + show_usage(); + } + filename = *(++argv); + break; + case '-': + if (strcmp(++(*argv), "file") || --argc ==0 ) { + show_usage(); + } + filename = *(++argv); + break; + default: + show_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; + puts(buf); + } else if (opt_domain) { + s = strchr(buf, '.'); + puts(s ? s + 1 : ""); + } else if (opt_ip) { + h = xgethostbyname(buf); + puts(inet_ntoa(*(struct in_addr *) (h->h_addr))); + } else { + puts(buf); + } + } + return(0); +} |