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text data bss dec hex filename 808035 611 6868 815514 c719a busybox_old 804472 611 6868 811951 c63af busybox_unstripped
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "unarchive.h"
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void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
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{
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file_header_t *file_header = archive_handle->file_header;
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int dst_fd;
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int res;
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if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) {
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char *name = xstrdup(file_header->name);
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bb_make_directory(dirname(name), -1, FILEUTILS_RECUR);
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free(name);
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}
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/* Check if the file already exists */
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if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
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/* Remove the entry if it exists */
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if (((file_header->mode & S_IFMT) != S_IFDIR)
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&& (unlink(file_header->name) == -1)
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&& (errno != ENOENT)
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) {
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bb_perror_msg_and_die("cannot remove old file %s",
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file_header->name);
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}
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}
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else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
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/* Remove the existing entry if its older than the extracted entry */
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struct stat statbuf;
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if (lstat(file_header->name, &statbuf) == -1) {
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if (errno != ENOENT) {
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bb_perror_msg_and_die("cannot stat old file");
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}
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}
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else if (statbuf.st_mtime <= file_header->mtime) {
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if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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bb_error_msg("%s not created: newer or "
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"same age file exists", file_header->name);
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}
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data_skip(archive_handle);
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return;
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}
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else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
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bb_perror_msg_and_die("cannot remove old file %s",
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file_header->name);
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}
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}
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/* Handle hard links separately
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* We identified hard links as regular files of size 0 with a symlink */
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if (S_ISREG(file_header->mode) && (file_header->link_target)
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&& (file_header->size == 0)
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) {
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/* hard link */
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res = link(file_header->link_target, file_header->name);
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if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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bb_perror_msg("cannot create %slink "
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"from %s to %s", "hard",
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file_header->name,
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file_header->link_target);
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}
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} else {
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/* Create the filesystem entry */
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switch (file_header->mode & S_IFMT) {
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case S_IFREG: {
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/* Regular file */
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dst_fd = xopen3(file_header->name, O_WRONLY | O_CREAT | O_EXCL,
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file_header->mode);
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bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
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close(dst_fd);
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break;
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}
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case S_IFDIR:
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res = mkdir(file_header->name, file_header->mode);
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if ((res == -1) && (errno != EISDIR)
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&& !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
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) {
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bb_perror_msg("cannot make dir %s", file_header->name);
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}
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break;
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case S_IFLNK:
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/* Symlink */
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res = symlink(file_header->link_target, file_header->name);
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if ((res == -1)
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&& !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
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) {
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bb_perror_msg("cannot create %slink "
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"from %s to %s", "sym",
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file_header->name,
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file_header->link_target);
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}
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break;
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case S_IFSOCK:
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case S_IFBLK:
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case S_IFCHR:
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case S_IFIFO:
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res = mknod(file_header->name, file_header->mode, file_header->device);
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if ((res == -1)
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&& !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
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) {
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bb_perror_msg("cannot create node %s", file_header->name);
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}
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break;
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default:
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bb_error_msg_and_die("unrecognized file type");
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}
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}
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if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
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#if ENABLE_FEATURE_TAR_UNAME_GNAME
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uid_t uid = file_header->uid;
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gid_t gid = file_header->gid;
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if (file_header->uname) {
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struct passwd *pwd = getpwnam(file_header->uname);
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if (pwd) uid = pwd->pw_uid;
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}
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if (file_header->gname) {
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struct group *grp = getgrnam(file_header->gname);
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if (grp) gid = grp->gr_gid;
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}
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lchown(file_header->name, uid, gid);
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#else
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lchown(file_header->name, file_header->uid, file_header->gid);
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#endif
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}
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if ((file_header->mode & S_IFMT) != S_IFLNK) {
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/* uclibc has no lchmod, glibc is even stranger -
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* it has lchmod which seems to do nothing!
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* so we use chmod... */
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if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM)) {
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chmod(file_header->name, file_header->mode);
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}
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/* same for utime */
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if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
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struct utimbuf t;
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t.actime = t.modtime = file_header->mtime;
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utime(file_header->name, &t);
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}
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}
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}
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