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    revision 983 by niro, Fri Apr 24 18:33:46 2009 UTC revision 984 by niro, Sun May 30 11:32:42 2010 UTC
    # Line 4  Line 4 
    4   *   *
    5   * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>   * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
    6   *   *
    7   * adjusted by Erik Andersen <andersen@codepoet.org> to remove   * Adjusted by Erik Andersen <andersen@codepoet.org> to remove
    8   * use of long options and GNU getopt.  Improved the usage info.   * use of long options and GNU getopt.  Improved the usage info.
    9   *   *
      * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA  
      *  
    10   * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.   * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    11   */   */
       
    12  #include "libbb.h"  #include "libbb.h"
    13    
    14  static void do_sethostname(char *s, int isfile)  static void do_sethostname(char *s, int isfile)
    15  {  {
    16   if (!s)  // if (!s)
    17   return;  // return;
    18   if (isfile) {   if (isfile) {
    19   parser_t *parser = config_open2(s, xfopen_for_read);   parser_t *parser = config_open2(s, xfopen_for_read);
    20   while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {   while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
    # Line 25  static void do_sethostname(char *s, int Line 22  static void do_sethostname(char *s, int
    22   }   }
    23   if (ENABLE_FEATURE_CLEAN_UP)   if (ENABLE_FEATURE_CLEAN_UP)
    24   config_close(parser);   config_close(parser);
    25   } else if (sethostname(s, strlen(s)) < 0) {   } else if (sethostname(s, strlen(s))) {
    26   if (errno == EPERM)  // if (errno == EPERM)
    27   bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);  // bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
    28   bb_perror_msg_and_die("sethostname");   bb_perror_msg_and_die("sethostname");
    29   }   }
    30  }  }
    31    
    32    /* Manpage circa 2009:
    33     *
    34     * hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [--long]
    35     *      [-i] [--ip-address] [-s] [--short] [-y] [--yp] [--nis]
    36     *
    37     * hostname [-v] [-F filename] [--file filename] / [hostname]
    38     *
    39     * domainname [-v] [-F filename] [--file filename]  / [name]
    40     *  { bbox: not supported }
    41     *
    42     * nodename [-v] [-F filename] [--file filename] / [name]
    43     *  { bbox: not supported }
    44     *
    45     * dnsdomainname [-v]
    46     *  { bbox: supported: Linux kernel build needs this }
    47     * nisdomainname [-v]
    48     *  { bbox: not supported }
    49     * ypdomainname [-v]
    50     *  { bbox: not supported }
    51     *
    52     * -a, --alias
    53     *  Display the alias name of the host (if used).
    54     *  { bbox: not supported }
    55     * -d, --domain
    56     *  Display the name of the DNS domain. Don't use the command
    57     *  domainname to get the DNS domain name because it will show the
    58     *  NIS domain name and not the DNS domain name. Use dnsdomainname
    59     *  instead.
    60     * -f, --fqdn, --long
    61     *  Display the FQDN (Fully Qualified Domain Name). A FQDN consists
    62     *  of a short host name and the DNS domain name. Unless you are
    63     *  using bind or NIS for host lookups you can change the FQDN and
    64     *  the DNS domain name (which is part of the FQDN) in the
    65     *  /etc/hosts file.
    66     * -i, --ip-address
    67     *  Display the IP address(es) of the host.
    68     * -s, --short
    69     *  Display the short host name. This is the host name cut at the
    70     *  first dot.
    71     * -v, --verbose
    72     *  Be verbose and tell what's going on.
    73     *  { bbox: supported but ignored }
    74     * -y, --yp, --nis
    75     *  Display the NIS domain name. If a parameter is given (or --file
    76     *  name ) then root can also set a new NIS domain.
    77     *  { bbox: not supported }
    78     * -F, --file filename
    79     *  Read the host name from the specified file. Comments (lines
    80     *  starting with a `#') are ignored.
    81     */
    82  int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;  int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    83  int hostname_main(int argc, char **argv)  int hostname_main(int argc UNUSED_PARAM, char **argv)
    84  {  {
    85   enum {   enum {
    86   OPT_d = 0x1,   OPT_d = 0x1,
    # Line 44  int hostname_main(int argc, char **argv) Line 91  int hostname_main(int argc, char **argv)
    91   OPT_dfis = 0xf,   OPT_dfis = 0xf,
    92   };   };
    93    
    94     unsigned opts;
    95   char *buf;   char *buf;
    96   char *hostname_str;   char *hostname_str;
    97    
    98   if (argc < 1)  #if ENABLE_LONG_OPTS
    99   bb_show_usage();   applet_long_options =
    100     "domain\0"     No_argument "d"
    101   getopt32(argv, "dfisF:", &hostname_str);   "fqdn\0"       No_argument "f"
    102     //Enable if seen in active use in some distro:
    103     // "long\0"       No_argument "f"
    104     // "ip-address\0" No_argument "i"
    105     // "short\0"      No_argument "s"
    106     // "verbose\0"    No_argument "v"
    107     "file\0"       No_argument "F"
    108     ;
    109    
    110    #endif
    111     /* dnsdomainname from net-tools 1.60, hostname 1.100 (2001-04-14),
    112     * supports hostname's options too (not just -v as manpage says) */
    113     opts = getopt32(argv, "dfisF:v", &hostname_str);
    114   argv += optind;   argv += optind;
    115   buf = safe_gethostname();   buf = safe_gethostname();
    116     if (applet_name[0] == 'd') /* dnsdomainname? */
    117     opts = OPT_d;
    118    
    119   /* Output in desired format */   if (opts & OPT_dfis) {
    120   if (option_mask32 & OPT_dfis) {   /* Cases when we need full hostname (or its part) */
    121   struct hostent *hp;   struct hostent *hp;
    122   char *p;   char *p;
    123    
    124   hp = xgethostbyname(buf);   hp = xgethostbyname(buf);
    125   p = strchr(hp->h_name, '.');   p = strchrnul(hp->h_name, '.');
    126   if (option_mask32 & OPT_f) {   if (opts & OPT_f) {
    127   puts(hp->h_name);   puts(hp->h_name);
    128   } else if (option_mask32 & OPT_s) {   } else if (opts & OPT_s) {
    129   if (p)   *p = '\0';
      *p = '\0';  
    130   puts(hp->h_name);   puts(hp->h_name);
    131   } else if (option_mask32 & OPT_d) {   } else if (opts & OPT_d) {
    132   if (p)   if (*p)
    133   puts(p + 1);   puts(p + 1);
    134   } else if (option_mask32 & OPT_i) {   } else /*if (opts & OPT_i)*/ {
    135   while (hp->h_addr_list[0]) {   while (hp->h_addr_list[0]) {
    136   printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));   printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
    137   }   }
    138   bb_putchar('\n');   bb_putchar('\n');
    139   }   }
    140   }   } else if (opts & OPT_F) {
    141   /* Set the hostname */   /* Set the hostname */
      else if (option_mask32 & OPT_F) {  
    142   do_sethostname(hostname_str, 1);   do_sethostname(hostname_str, 1);
    143   } else if (argv[0]) {   } else if (argv[0]) {
    144     /* Set the hostname */
    145   do_sethostname(argv[0], 0);   do_sethostname(argv[0], 0);
    146   }   } else {
    147   /* Or if all else fails,   /* Just print the current hostname */
      * just print the current hostname */  
      else {  
    148   puts(buf);   puts(buf);
    149   }   }
    150    
    151   if (ENABLE_FEATURE_CLEAN_UP)   if (ENABLE_FEATURE_CLEAN_UP)
    152   free(buf);   free(buf);
    153   return EXIT_SUCCESS;   return EXIT_SUCCESS;
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