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    Annotation of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/data_extract_all.c

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    Revision 984 - (hide annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 4688 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    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 niro 816 void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
    10 niro 532 {
    11     file_header_t *file_header = archive_handle->file_header;
    12     int dst_fd;
    13     int res;
    14    
    15 niro 816 if (archive_handle->ah_flags & ARCHIVE_CREATE_LEADING_DIRS) {
    16 niro 984 char *slash = strrchr(file_header->name, '/');
    17     if (slash) {
    18     *slash = '\0';
    19     bb_make_directory(file_header->name, -1, FILEUTILS_RECUR);
    20     *slash = '/';
    21     }
    22 niro 532 }
    23    
    24 niro 984 if (archive_handle->ah_flags & ARCHIVE_UNLINK_OLD) {
    25 niro 816 /* Remove the entry if it exists */
    26 niro 984 if ((!S_ISDIR(file_header->mode))
    27 niro 532 && (unlink(file_header->name) == -1)
    28     && (errno != ENOENT)
    29     ) {
    30 niro 984 bb_perror_msg_and_die("can't remove old file %s",
    31 niro 816 file_header->name);
    32 niro 532 }
    33     }
    34 niro 816 else if (archive_handle->ah_flags & ARCHIVE_EXTRACT_NEWER) {
    35 niro 532 /* Remove the existing entry if its older than the extracted entry */
    36 niro 984 struct stat existing_sb;
    37     if (lstat(file_header->name, &existing_sb) == -1) {
    38 niro 532 if (errno != ENOENT) {
    39 niro 984 bb_perror_msg_and_die("can't stat old file");
    40 niro 532 }
    41     }
    42 niro 984 else if (existing_sb.st_mtime >= file_header->mtime) {
    43 niro 816 if (!(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) {
    44 niro 532 bb_error_msg("%s not created: newer or "
    45     "same age file exists", file_header->name);
    46     }
    47     data_skip(archive_handle);
    48     return;
    49     }
    50     else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
    51 niro 984 bb_perror_msg_and_die("can't remove old file %s",
    52 niro 532 file_header->name);
    53     }
    54     }
    55    
    56     /* Handle hard links separately
    57     * We identified hard links as regular files of size 0 with a symlink */
    58 niro 984 if (S_ISREG(file_header->mode)
    59     && file_header->link_target
    60     && file_header->size == 0
    61 niro 532 ) {
    62     /* hard link */
    63 niro 816 res = link(file_header->link_target, file_header->name);
    64     if ((res == -1) && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) {
    65 niro 984 bb_perror_msg("can't create %slink "
    66 niro 816 "from %s to %s", "hard",
    67     file_header->name,
    68     file_header->link_target);
    69 niro 532 }
    70     } else {
    71     /* Create the filesystem entry */
    72     switch (file_header->mode & S_IFMT) {
    73     case S_IFREG: {
    74     /* Regular file */
    75 niro 984 int flags = O_WRONLY | O_CREAT | O_EXCL;
    76     if (archive_handle->ah_flags & ARCHIVE_O_TRUNC)
    77     flags = O_WRONLY | O_CREAT | O_TRUNC;
    78     dst_fd = xopen3(file_header->name,
    79     flags,
    80     file_header->mode
    81     );
    82 niro 532 bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
    83     close(dst_fd);
    84     break;
    85     }
    86     case S_IFDIR:
    87     res = mkdir(file_header->name, file_header->mode);
    88 niro 816 if ((res == -1)
    89     && (errno != EISDIR) /* btw, Linux doesn't return this */
    90     && (errno != EEXIST)
    91     && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
    92 niro 532 ) {
    93 niro 984 bb_perror_msg("can't make dir %s", file_header->name);
    94 niro 532 }
    95     break;
    96     case S_IFLNK:
    97     /* Symlink */
    98 niro 816 res = symlink(file_header->link_target, file_header->name);
    99 niro 532 if ((res == -1)
    100 niro 816 && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
    101 niro 532 ) {
    102 niro 984 bb_perror_msg("can't create %slink "
    103 niro 816 "from %s to %s", "sym",
    104 niro 532 file_header->name,
    105 niro 816 file_header->link_target);
    106 niro 532 }
    107     break;
    108     case S_IFSOCK:
    109     case S_IFBLK:
    110     case S_IFCHR:
    111     case S_IFIFO:
    112     res = mknod(file_header->name, file_header->mode, file_header->device);
    113     if ((res == -1)
    114 niro 816 && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
    115 niro 532 ) {
    116 niro 984 bb_perror_msg("can't create node %s", file_header->name);
    117 niro 532 }
    118     break;
    119     default:
    120     bb_error_msg_and_die("unrecognized file type");
    121     }
    122     }
    123    
    124 niro 984 if (!(archive_handle->ah_flags & ARCHIVE_DONT_RESTORE_OWNER)) {
    125 niro 816 #if ENABLE_FEATURE_TAR_UNAME_GNAME
    126 niro 984 if (!(archive_handle->ah_flags & ARCHIVE_NUMERIC_OWNER)) {
    127     uid_t uid = file_header->uid;
    128     gid_t gid = file_header->gid;
    129 niro 816
    130 niro 984 if (file_header->tar__uname) {
    131     //TODO: cache last name/id pair?
    132     struct passwd *pwd = getpwnam(file_header->tar__uname);
    133     if (pwd) uid = pwd->pw_uid;
    134     }
    135     if (file_header->tar__gname) {
    136     struct group *grp = getgrnam(file_header->tar__gname);
    137     if (grp) gid = grp->gr_gid;
    138     }
    139     /* GNU tar 1.15.1 uses chown, not lchown */
    140     chown(file_header->name, uid, gid);
    141     } else
    142 niro 816 #endif
    143 niro 984 chown(file_header->name, file_header->uid, file_header->gid);
    144 niro 532 }
    145 niro 984 if (!S_ISLNK(file_header->mode)) {
    146 niro 816 /* uclibc has no lchmod, glibc is even stranger -
    147     * it has lchmod which seems to do nothing!
    148     * so we use chmod... */
    149 niro 984 if (!(archive_handle->ah_flags & ARCHIVE_DONT_RESTORE_PERM)) {
    150 niro 816 chmod(file_header->name, file_header->mode);
    151     }
    152     /* same for utime */
    153 niro 984 if (archive_handle->ah_flags & ARCHIVE_RESTORE_DATE) {
    154     struct timeval t[2];
    155    
    156     t[1].tv_sec = t[0].tv_sec = file_header->mtime;
    157     t[1].tv_usec = t[0].tv_usec = 0;
    158     utimes(file_header->name, t);
    159 niro 816 }
    160 niro 532 }
    161     }