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    Contents of /trunk/mkinitrd-magellan/busybox/networking/hostname.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    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 /* 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 }