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    Contents of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/data_extract_all.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: 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 /* 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 }