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    Annotation of /tags/mkinitrd-6_1_11/busybox/networking/hostname.c

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    Revision 928 - (hide annotations) (download)
    Wed Oct 28 13:31:19 2009 UTC (14 years, 7 months ago) by niro
    File MIME type: text/plain
    File size: 2137 byte(s) 
    tagged 'mkinitrd-6_1_11'
    1 niro 532 /* vi: set sw=4 ts=4: */
    2     /*
    3     * Mini hostname implementation for busybox
    4     *
    5     * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
    6     *
    7     * adjusted by Erik Andersen <andersen@codepoet.org> to remove
    8     * use of long options and GNU getopt. Improved the usage info.
    9     *
    10     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    11     *
    12     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    13     */
    14    
    15 niro 816 #include "libbb.h"
    16 niro 532
    17     static void do_sethostname(char *s, int isfile)
    18     {
    19     if (!s)
    20     return;
    21 niro 816 if (isfile) {
    22     parser_t *parser = config_open2(s, xfopen_for_read);
    23     while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY)) {
    24     do_sethostname(s, 0);
    25 niro 532 }
    26     if (ENABLE_FEATURE_CLEAN_UP)
    27 niro 816 config_close(parser);
    28     } else if (sethostname(s, strlen(s)) < 0) {
    29     if (errno == EPERM)
    30     bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
    31     bb_perror_msg_and_die("sethostname");
    32 niro 532 }
    33     }
    34    
    35 niro 816 int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    36 niro 532 int hostname_main(int argc, char **argv)
    37     {
    38     enum {
    39     OPT_d = 0x1,
    40     OPT_f = 0x2,
    41     OPT_i = 0x4,
    42     OPT_s = 0x8,
    43 niro 816 OPT_F = 0x10,
    44 niro 532 OPT_dfis = 0xf,
    45     };
    46    
    47 niro 816 char *buf;
    48     char *hostname_str;
    49 niro 532
    50     if (argc < 1)
    51     bb_show_usage();
    52    
    53 niro 816 getopt32(argv, "dfisF:", &hostname_str);
    54     argv += optind;
    55     buf = safe_gethostname();
    56 niro 532
    57     /* Output in desired format */
    58     if (option_mask32 & OPT_dfis) {
    59     struct hostent *hp;
    60     char *p;
    61     hp = xgethostbyname(buf);
    62     p = strchr(hp->h_name, '.');
    63     if (option_mask32 & OPT_f) {
    64     puts(hp->h_name);
    65     } else if (option_mask32 & OPT_s) {
    66 niro 816 if (p)
    67     *p = '\0';
    68 niro 532 puts(hp->h_name);
    69     } else if (option_mask32 & OPT_d) {
    70     if (p)
    71     puts(p + 1);
    72     } else if (option_mask32 & OPT_i) {
    73     while (hp->h_addr_list[0]) {
    74     printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
    75     }
    76 niro 816 bb_putchar('\n');
    77 niro 532 }
    78     }
    79     /* Set the hostname */
    80 niro 816 else if (option_mask32 & OPT_F) {
    81 niro 532 do_sethostname(hostname_str, 1);
    82 niro 816 } else if (argv[0]) {
    83     do_sethostname(argv[0], 0);
    84 niro 532 }
    85     /* Or if all else fails,
    86     * just print the current hostname */
    87     else {
    88     puts(buf);
    89     }
    90 niro 816 if (ENABLE_FEATURE_CLEAN_UP)
    91     free(buf);
    92     return EXIT_SUCCESS;
    93 niro 532 }