X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fhostname.c;h=579eff7959874c9f1dfdd684affbd918dca98789;hb=e7670ff81d01d06f8f27ffb3b6e6d5e6f92c8f74;hp=50ef7b5d13fef2c63edd94d8b56a7330d54a9af2;hpb=b6adbf1be29841501cc49917249e85f273e1df7c;p=oweals%2Fbusybox.git diff --git a/networking/hostname.c b/networking/hostname.c index 50ef7b5d1..579eff795 100644 --- a/networking/hostname.c +++ b/networking/hostname.c @@ -4,45 +4,83 @@ * * 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. * - * 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 "libbb.h" static void do_sethostname(char *s, int isfile) { - FILE *f; - - if (!s) - return; - if (!isfile) { - if (sethostname(s, strlen(s)) < 0) { - if (errno == EPERM) - bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); - else - bb_perror_msg_and_die("sethostname"); - } - } else { - f = xfopen(s, "r"); - while (fgets(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), f) != NULL) { - if (bb_common_bufsiz1[0] == '#') { - continue; - } - chomp(bb_common_bufsiz1); - do_sethostname(bb_common_bufsiz1, 0); +// 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); } if (ENABLE_FEATURE_CLEAN_UP) - fclose(f); + 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); -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) { enum { OPT_d = 0x1, @@ -53,49 +91,64 @@ int hostname_main(int argc, char **argv) OPT_dfis = 0xf, }; - char buf[256]; + unsigned opts; + char *buf; char *hostname_str; - if (argc < 1) - 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" + ; - getopt32(argc, argv, "dfisF:", &hostname_str); +#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; - /* Output in desired format */ - if (option_mask32 & OPT_dfis) { + if (opts & OPT_dfis) { + /* Cases when we need full hostname (or its part) */ struct hostent *hp; char *p; - gethostname(buf, sizeof(buf)); + hp = xgethostbyname(buf); - p = strchr(hp->h_name, '.'); - if (option_mask32 & OPT_f) { + p = strchrnul(hp->h_name, '.'); + if (opts & OPT_f) { puts(hp->h_name); - } else if (option_mask32 & OPT_s) { - if (p != NULL) { - *p = '\0'; - } + } else if (opts & OPT_s) { + *p = '\0'; puts(hp->h_name); - } else if (option_mask32 & OPT_d) { - if (p) + } else if (opts & OPT_d) { + if (*p) puts(p + 1); - } else if (option_mask32 & OPT_i) { + } else /*if (opts & OPT_i)*/ { while (hp->h_addr_list[0]) { printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++))); } - puts(""); + bb_putchar('\n'); } - } - /* Set the hostname */ - else if (option_mask32 & OPT_F) { + } else if (opts & OPT_F) { + /* Set the hostname */ do_sethostname(hostname_str, 1); - } else if (optind < argc) { - do_sethostname(argv[optind], 0); - } - /* Or if all else fails, - * just print the current hostname */ - else { - gethostname(buf, sizeof(buf)); + } 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; }