X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=networking%2Fhostname.c;h=579eff7959874c9f1dfdd684affbd918dca98789;hb=e7670ff81d01d06f8f27ffb3b6e6d5e6f92c8f74;hp=6522bb21bbd2a074adc3f40fdbb3e46872270284;hpb=cad5364599eb5062d59e0c397ed638ddd61a8d5d;p=oweals%2Fbusybox.git diff --git a/networking/hostname.c b/networking/hostname.c index 6522bb21b..579eff795 100644 --- a/networking/hostname.c +++ b/networking/hostname.c @@ -1,130 +1,154 @@ /* vi: set sw=4 ts=4: */ /* - * $Id: hostname.c,v 1.35 2003/03/19 09:12:37 mjn3 Exp $ * Mini hostname implementation for busybox * * Copyright (C) 1999 by Randolph Chung * - * adjusted by Erik Andersen to remove + * Adjusted by Erik Andersen 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 + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include "busybox.h" - -extern char *optarg; /* in unistd.h */ -extern int optind, opterr, optopt; /* in unistd.h */ +#include "libbb.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"); +// 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); } - } 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 + if (ENABLE_FEATURE_CLEAN_UP) + config_close(parser); + } else if (sethostname(s, strlen(s))) { +// 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) +/* Manpage circa 2009: + * + * hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [--long] + * [-i] [--ip-address] [-s] [--short] [-y] [--yp] [--nis] + * + * hostname [-v] [-F filename] [--file filename] / [hostname] + * + * domainname [-v] [-F filename] [--file filename] / [name] + * { bbox: not supported } + * + * nodename [-v] [-F filename] [--file filename] / [name] + * { bbox: not supported } + * + * dnsdomainname [-v] + * { bbox: supported: Linux kernel build needs this } + * nisdomainname [-v] + * { bbox: not supported } + * ypdomainname [-v] + * { bbox: not supported } + * + * -a, --alias + * Display the alias name of the host (if used). + * { bbox: not supported } + * -d, --domain + * Display the name of the DNS domain. Don't use the command + * domainname to get the DNS domain name because it will show the + * NIS domain name and not the DNS domain name. Use dnsdomainname + * instead. + * -f, --fqdn, --long + * Display the FQDN (Fully Qualified Domain Name). A FQDN consists + * of a short host name and the DNS domain name. Unless you are + * using bind or NIS for host lookups you can change the FQDN and + * the DNS domain name (which is part of the FQDN) in the + * /etc/hosts file. + * -i, --ip-address + * Display the IP address(es) of the host. + * -s, --short + * Display the short host name. This is the host name cut at the + * first dot. + * -v, --verbose + * Be verbose and tell what's going on. + * { bbox: supported but ignored } + * -y, --yp, --nis + * Display the NIS domain name. If a parameter is given (or --file + * name ) then root can also set a new NIS domain. + * { bbox: not supported } + * -F, --file filename + * Read the host name from the specified file. Comments (lines + * starting with a `#') are ignored. + */ +int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int hostname_main(int argc UNUSED_PARAM, char **argv) { - int opt; - int type = 0; - struct hostent *hp; - char *filename = NULL; - char buf[255]; - char *p = NULL; + enum { + OPT_d = 0x1, + OPT_f = 0x2, + OPT_i = 0x4, + OPT_s = 0x8, + OPT_F = 0x10, + OPT_dfis = 0xf, + }; - if (argc < 1) - bb_show_usage(); + unsigned opts; + char *buf; + char *hostname_str; - 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(); - } - } +#if ENABLE_LONG_OPTS + applet_long_options = + "domain\0" No_argument "d" + "fqdn\0" No_argument "f" + //Enable if seen in active use in some distro: + // "long\0" No_argument "f" + // "ip-address\0" No_argument "i" + // "short\0" No_argument "s" + // "verbose\0" No_argument "v" + "file\0" No_argument "F" + ; + +#endif + /* dnsdomainname from net-tools 1.60, hostname 1.100 (2001-04-14), + * supports hostname's options too (not just -v as manpage says) */ + opts = getopt32(argv, "dfisF:v", &hostname_str); + argv += optind; + buf = safe_gethostname(); + if (applet_name[0] == 'd') /* dnsdomainname? */ + opts = OPT_d; + + if (opts & OPT_dfis) { + /* Cases when we need full hostname (or its part) */ + struct hostent *hp; + char *p; - /* Output in desired format */ - if (type != 0) { - gethostname(buf, 255); hp = xgethostbyname(buf); - p = strchr(hp->h_name, '.'); - if (type == 'f') { + p = strchrnul(hp->h_name, '.'); + if (opts & OPT_f) { puts(hp->h_name); - } else if (type == 's') { - if (p != NULL) { - *p = 0; - } + } else if (opts & OPT_s) { + *p = '\0'; puts(hp->h_name); - } else if (type == 'd') { - if (p) puts(p + 1); - } else if (type == 'i') { + } else if (opts & OPT_d) { + if (*p) + puts(p + 1); + } else /*if (opts & OPT_i)*/ { while (hp->h_addr_list[0]) { printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++))); } - printf("\n"); + bb_putchar('\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); + } else if (opts & OPT_F) { + /* Set the hostname */ + do_sethostname(hostname_str, 1); + } else if (argv[0]) { + /* Set the hostname */ + do_sethostname(argv[0], 0); + } else { + /* Just print the current hostname */ puts(buf); } - return(0); + + if (ENABLE_FEATURE_CLEAN_UP) + free(buf); + return EXIT_SUCCESS; }