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    Contents of /tags/mkinitrd-6_1_7/busybox/networking/hostname.c

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    Revision 909 - (show annotations) (download)
    Fri Oct 16 13:40:14 2009 UTC (14 years, 7 months ago) by niro
    File MIME type: text/plain
    File size: 2137 byte(s) 
    tagged 'mkinitrd-6_1_7'
    1 /* 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 #include "libbb.h"
    16
    17 static void do_sethostname(char *s, int isfile)
    18 {
    19 if (!s)
    20 return;
    21 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 }
    26 if (ENABLE_FEATURE_CLEAN_UP)
    27 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 }
    33 }
    34
    35 int hostname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    36 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 OPT_F = 0x10,
    44 OPT_dfis = 0xf,
    45 };
    46
    47 char *buf;
    48 char *hostname_str;
    49
    50 if (argc < 1)
    51 bb_show_usage();
    52
    53 getopt32(argv, "dfisF:", &hostname_str);
    54 argv += optind;
    55 buf = safe_gethostname();
    56
    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 if (p)
    67 *p = '\0';
    68 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 bb_putchar('\n');
    77 }
    78 }
    79 /* Set the hostname */
    80 else if (option_mask32 & OPT_F) {
    81 do_sethostname(hostname_str, 1);
    82 } else if (argv[0]) {
    83 do_sethostname(argv[0], 0);
    84 }
    85 /* Or if all else fails,
    86 * just print the current hostname */
    87 else {
    88 puts(buf);
    89 }
    90 if (ENABLE_FEATURE_CLEAN_UP)
    91 free(buf);
    92 return EXIT_SUCCESS;
    93 }