X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fhostname.c;h=04a051ede7f79089eb98a4d43d9e989ddb990158;hb=11d0096516c0d5395729caba5dfd940a10a6e20c;hp=3dba641540e2c8da76c6fedfae5e189a7ed7a9a6;hpb=dd19c6990496023fe23fefef8f1798740f7d39c6;p=oweals%2Fbusybox.git diff --git a/networking/hostname.c b/networking/hostname.c index 3dba64154..04a051ede 100644 --- a/networking/hostname.c +++ b/networking/hostname.c @@ -1,131 +1,201 @@ /* vi: set sw=4 ts=4: */ /* - * $Id: hostname.c,v 1.22 2001/01/31 19:00:20 kraai 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 source tree. */ -#include "busybox.h" -#include -#include -#include -#include -#include -#include +//config:config HOSTNAME +//config: bool "hostname" +//config: default y +//config: help +//config: Show or set the system's host name. +//config: +//config:config DNSDOMAINNAME +//config: bool "dnsdomainname" +//config: default y +//config: help +//config: Alias to "hostname -d". -void do_sethostname(char *s, int isfile) -{ - FILE *f; - char buf[255]; +//applet:IF_DNSDOMAINNAME(APPLET_ODDNAME(dnsdomainname, hostname, BB_DIR_BIN, BB_SUID_DROP, dnsdomainname)) +//applet:IF_HOSTNAME(APPLET(hostname, BB_DIR_BIN, BB_SUID_DROP)) + +//kbuild: lib-$(CONFIG_HOSTNAME) += hostname.o +//kbuild: lib-$(CONFIG_DNSDOMAINNAME) += hostname.o + +//usage:#define hostname_trivial_usage +//usage: "[OPTIONS] [HOSTNAME | -F FILE]" +//usage:#define hostname_full_usage "\n\n" +//usage: "Get or set hostname or DNS domain name\n" +//usage: "\n -s Short" +//usage: "\n -i Addresses for the hostname" +//usage: "\n -d DNS domain name" +//usage: "\n -f Fully qualified domain name" +//usage: "\n -F FILE Use FILE's content as hostname" +//usage: +//usage:#define hostname_example_usage +//usage: "$ hostname\n" +//usage: "sage\n" +//usage: +//usage:#define dnsdomainname_trivial_usage NOUSAGE_STR +//usage:#define dnsdomainname_full_usage "" + +#include "libbb.h" - 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"); +static void do_sethostname(char *s, int isfile) +{ +// 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 = xfopen(s, "r"); - fgets(buf, 255, f); - fclose(f); - if (buf[strlen(buf) - 1] == '\n') - buf[strlen(buf) - 1] = 0; - if (sethostname(buf, strlen(buf)) < 0) - perror_msg_and_die("sethostname"); + 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_short = 0; - int opt_domain = 0; - int opt_ip = 0; - struct hostent *h; - char *filename = NULL; - char buf[255]; - char *s = NULL; + enum { + OPT_d = 0x1, + OPT_f = 0x2, + OPT_i = 0x4, + OPT_s = 0x8, + OPT_F = 0x10, + OPT_dfi = 0x7, + }; - if (argc < 1) - usage(hostname_usage); + unsigned opts; + char *buf; + char *hostname_str; - 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) { - usage(hostname_usage); - } - filename = *(++argv); - break; - case '-': - if (strcmp(++(*argv), "file") || --argc ==0 ) { - usage(hostname_usage); - } - filename = *(++argv); - break; - default: - usage(hostname_usage); - } - if (filename != NULL) - break; +#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 (ENABLE_DNSDOMAINNAME) { + if (!ENABLE_HOSTNAME || applet_name[0] == 'd') { + /* dnsdomainname */ + opts = OPT_d; } } - 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); + if (opts & OPT_dfi) { + /* Cases when we need full hostname (or its part) */ + struct hostent *hp; + char *p; + + hp = xgethostbyname(buf); + p = strchrnul(hp->h_name, '.'); + if (opts & OPT_f) { + puts(hp->h_name); + } else if (opts & OPT_s) { + *p = '\0'; + puts(hp->h_name); + } else if (opts & OPT_d) { + if (*p) + puts(p + 1); + } else /*if (opts & OPT_i)*/ { + if (hp->h_length == sizeof(struct in_addr)) { + struct in_addr **h_addr_list = (struct in_addr **)hp->h_addr_list; + while (*h_addr_list) { + printf(h_addr_list[1] ? "%s " : "%s", inet_ntoa(**h_addr_list)); + h_addr_list++; + } + bb_putchar('\n'); } - printf("%s\n", inet_ntoa(*(struct in_addr *) (h->h_addr))); - } else { - printf("%s\n", buf); } + } else if (opts & OPT_s) { + strchrnul(buf, '.')[0] = '\0'; + puts(buf); + } 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; }