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    Annotation of /trunk/mkinitrd-magellan/busybox/archival/ar.c

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    Revision 532 - (hide annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 2567 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     * Mini ar implementation for busybox
    4     *
    5     * Copyright (C) 2000 by Glenn McGrath
    6     * Written by Glenn McGrath <bug1@iinet.net.au> 1 June 2000
    7     *
    8     * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
    9     *
    10     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    11     *
    12     * There is no single standard to adhere to so ar may not portable
    13     * between different systems
    14     * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html
    15     */
    16    
    17     #include "busybox.h"
    18     #include "unarchive.h"
    19    
    20     static void header_verbose_list_ar(const file_header_t *file_header)
    21     {
    22     const char *mode = bb_mode_string(file_header->mode);
    23     char *mtime;
    24    
    25     mtime = ctime(&file_header->mtime);
    26     mtime[16] = ' ';
    27     memmove(&mtime[17], &mtime[20], 4);
    28     mtime[21] = '\0';
    29     printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid,
    30     (int) file_header->size, &mtime[4], file_header->name);
    31     }
    32    
    33     #define AR_CTX_PRINT 0x01
    34     #define AR_CTX_LIST 0x02
    35     #define AR_CTX_EXTRACT 0x04
    36     #define AR_OPT_PRESERVE_DATE 0x08
    37     #define AR_OPT_VERBOSE 0x10
    38     #define AR_OPT_CREATE 0x20
    39     #define AR_OPT_INSERT 0x40
    40    
    41     int ar_main(int argc, char **argv)
    42     {
    43     archive_handle_t *archive_handle;
    44     unsigned opt;
    45     static const char msg_unsupported_err[] =
    46     "Archive %s not supported. Install binutils 'ar'.";
    47     char magic[8];
    48    
    49     archive_handle = init_handle();
    50    
    51     /* Prepend '-' to the first argument if required */
    52     opt_complementary = "--:p:t:x:-1:?:p--tx:t--px:x--pt";
    53     opt = getopt32(argc, argv, "ptxovcr");
    54    
    55     if (opt & AR_CTX_PRINT) {
    56     archive_handle->action_data = data_extract_to_stdout;
    57     }
    58     if (opt & AR_CTX_LIST) {
    59     archive_handle->action_header = header_list;
    60     }
    61     if (opt & AR_CTX_EXTRACT) {
    62     archive_handle->action_data = data_extract_all;
    63     }
    64     if (opt & AR_OPT_PRESERVE_DATE) {
    65     archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
    66     }
    67     if (opt & AR_OPT_VERBOSE) {
    68     archive_handle->action_header = header_verbose_list_ar;
    69     }
    70     if (opt & AR_OPT_CREATE) {
    71     bb_error_msg_and_die(msg_unsupported_err, "creation");
    72     }
    73     if (opt & AR_OPT_INSERT) {
    74     bb_error_msg_and_die(msg_unsupported_err, "insertion");
    75     }
    76    
    77     archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
    78    
    79     while (optind < argc) {
    80     archive_handle->filter = filter_accept_list;
    81     llist_add_to(&(archive_handle->accept), argv[optind++]);
    82     }
    83    
    84     xread(archive_handle->src_fd, magic, 7);
    85     if (strncmp(magic, "!<arch>", 7) != 0) {
    86     bb_error_msg_and_die("invalid ar magic");
    87     }
    88     archive_handle->offset += 7;
    89    
    90     while (get_header_ar(archive_handle) == EXIT_SUCCESS) /* repeat */;
    91    
    92     return EXIT_SUCCESS;
    93     }