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    Annotation of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/data_extract_all.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: 3444 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     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    4     */
    5    
    6     #include "libbb.h"
    7     #include "unarchive.h"
    8    
    9     void data_extract_all(archive_handle_t *archive_handle)
    10     {
    11     file_header_t *file_header = archive_handle->file_header;
    12     int dst_fd;
    13     int res;
    14    
    15     if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) {
    16     char *name = xstrdup(file_header->name);
    17     bb_make_directory(dirname(name), -1, FILEUTILS_RECUR);
    18     free(name);
    19     }
    20    
    21     /* Check if the file already exists */
    22     if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
    23     /* Remove the existing entry if it exists */
    24     if (((file_header->mode & S_IFMT) != S_IFDIR)
    25     && (unlink(file_header->name) == -1)
    26     && (errno != ENOENT)
    27     ) {
    28     bb_perror_msg_and_die("cannot remove old file");
    29     }
    30     }
    31     else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
    32     /* Remove the existing entry if its older than the extracted entry */
    33     struct stat statbuf;
    34     if (lstat(file_header->name, &statbuf) == -1) {
    35     if (errno != ENOENT) {
    36     bb_perror_msg_and_die("cannot stat old file");
    37     }
    38     }
    39     else if (statbuf.st_mtime <= file_header->mtime) {
    40     if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
    41     bb_error_msg("%s not created: newer or "
    42     "same age file exists", file_header->name);
    43     }
    44     data_skip(archive_handle);
    45     return;
    46     }
    47     else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
    48     bb_perror_msg_and_die("cannot remove old file %s",
    49     file_header->name);
    50     }
    51     }
    52    
    53     /* Handle hard links separately
    54     * We identified hard links as regular files of size 0 with a symlink */
    55     if (S_ISREG(file_header->mode) && (file_header->link_name)
    56     && (file_header->size == 0)
    57     ) {
    58     /* hard link */
    59     res = link(file_header->link_name, file_header->name);
    60     if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
    61     bb_perror_msg("cannot create hard link");
    62     }
    63     } else {
    64     /* Create the filesystem entry */
    65     switch (file_header->mode & S_IFMT) {
    66     case S_IFREG: {
    67     /* Regular file */
    68     dst_fd = xopen3(file_header->name, O_WRONLY | O_CREAT | O_EXCL,
    69     file_header->mode);
    70     bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
    71     close(dst_fd);
    72     break;
    73     }
    74     case S_IFDIR:
    75     res = mkdir(file_header->name, file_header->mode);
    76     if ((errno != EISDIR) && (res == -1)
    77     && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
    78     ) {
    79     bb_perror_msg("extract_archive: %s", file_header->name);
    80     }
    81     break;
    82     case S_IFLNK:
    83     /* Symlink */
    84     res = symlink(file_header->link_name, file_header->name);
    85     if ((res == -1)
    86     && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
    87     ) {
    88     bb_perror_msg("cannot create symlink "
    89     "from %s to '%s'",
    90     file_header->name,
    91     file_header->link_name);
    92     }
    93     break;
    94     case S_IFSOCK:
    95     case S_IFBLK:
    96     case S_IFCHR:
    97     case S_IFIFO:
    98     res = mknod(file_header->name, file_header->mode, file_header->device);
    99     if ((res == -1)
    100     && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
    101     ) {
    102     bb_perror_msg("cannot create node %s", file_header->name);
    103     }
    104     break;
    105     default:
    106     bb_error_msg_and_die("unrecognized file type");
    107     }
    108     }
    109    
    110     if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
    111     lchown(file_header->name, file_header->uid, file_header->gid);
    112     }
    113    
    114     if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
    115     struct utimbuf t;
    116     t.actime = t.modtime = file_header->mtime;
    117     utime(file_header->name, &t);
    118     }
    119     }