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    Annotation of /tags/mkinitrd-6_3_1/busybox/networking/hostname.c

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    Revision 532 - (hide annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
    Original Path: trunk/mkinitrd-magellan/busybox/networking/hostname.c
    File MIME type: text/plain
    File size: 2197 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    1 niro 532 /* vi: set sw=4 ts=4: */
    2     /*
    3     * $Id: hostname.c,v 1.1 2007-09-01 22:43:53 niro Exp $
    4     * Mini hostname implementation for busybox
    5     *
    6     * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
    7     *
    8     * adjusted by Erik Andersen <andersen@codepoet.org> to remove
    9     * use of long options and GNU getopt. Improved the usage info.
    10     *
    11     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    12     *
    13     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    14     */
    15    
    16     #include "busybox.h"
    17    
    18     static void do_sethostname(char *s, int isfile)
    19     {
    20     FILE *f;
    21    
    22     if (!s)
    23     return;
    24     if (!isfile) {
    25     if (sethostname(s, strlen(s)) < 0) {
    26     if (errno == EPERM)
    27     bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
    28     else
    29     bb_perror_msg_and_die("sethostname");
    30     }
    31     } else {
    32     f = xfopen(s, "r");
    33     while (fgets(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), f) != NULL) {
    34     if (bb_common_bufsiz1[0] == '#') {
    35     continue;
    36     }
    37     chomp(bb_common_bufsiz1);
    38     do_sethostname(bb_common_bufsiz1, 0);
    39     }
    40     if (ENABLE_FEATURE_CLEAN_UP)
    41     fclose(f);
    42     }
    43     }
    44    
    45     int hostname_main(int argc, char **argv)
    46     {
    47     enum {
    48     OPT_d = 0x1,
    49     OPT_f = 0x2,
    50     OPT_i = 0x4,
    51     OPT_s = 0x8,
    52     OPT_dfis = 0xf,
    53     };
    54    
    55     char buf[256];
    56     char *hostname_str = NULL;
    57    
    58     if (argc < 1)
    59     bb_show_usage();
    60    
    61     getopt32(argc, argv, "dfisF:", &hostname_str);
    62    
    63     /* Output in desired format */
    64     if (option_mask32 & OPT_dfis) {
    65     struct hostent *hp;
    66     char *p;
    67     gethostname(buf, sizeof(buf));
    68     hp = xgethostbyname(buf);
    69     p = strchr(hp->h_name, '.');
    70     if (option_mask32 & OPT_f) {
    71     puts(hp->h_name);
    72     } else if (option_mask32 & OPT_s) {
    73     if (p != NULL) {
    74     *p = 0;
    75     }
    76     puts(hp->h_name);
    77     } else if (option_mask32 & OPT_d) {
    78     if (p)
    79     puts(p + 1);
    80     } else if (option_mask32 & OPT_i) {
    81     while (hp->h_addr_list[0]) {
    82     printf("%s ", inet_ntoa(*(struct in_addr *) (*hp->h_addr_list++)));
    83     }
    84     puts("");
    85     }
    86     }
    87     /* Set the hostname */
    88     else if (hostname_str != NULL) {
    89     do_sethostname(hostname_str, 1);
    90     } else if (optind < argc) {
    91     do_sethostname(argv[optind], 0);
    92     }
    93     /* Or if all else fails,
    94     * just print the current hostname */
    95     else {
    96     gethostname(buf, sizeof(buf));
    97     puts(buf);
    98     }
    99     return 0;
    100     }