void data_extract_to_buffer(archive_handle_t *archive_handle)
{
const unsigned int size = archive_handle->file_header->size;
archive_handle->buffer = xmalloc(size + 1);
archive_xread_all(archive_handle, archive_handle->buffer, size);
archive_handle->buffer[size] = '\0';
}
extern void unpack_ar_archive(archive_handle_t *ar_archive)
{
char magic[7];
archive_xread_all(ar_archive, magic, 7);
if (strncmp(magic, "!<arch>", 7) != 0) {
bb_error_msg_and_die("Invalid ar magic");
}
ar_archive->offset += 7;
while (get_header_ar(ar_archive) == EXIT_SUCCESS);
}
extern char get_header_tar(archive_handle_t *archive_handle)
{
file_header_t *file_header = archive_handle->file_header;
union {
unsigned char raw[512];
struct {
char name[100]; /* 0-99 */
char mode[8]; /* 100-107 */
char uid[8]; /* 108-115 */
char gid[8]; /* 116-123 */
char size[12]; /* 124-135 */
char mtime[12]; /* 136-147 */
char chksum[8]; /* 148-155 */
char typeflag; /* 156-156 */
char linkname[100]; /* 157-256 */
char magic[6]; /* 257-262 */
char version[2]; /* 263-264 */
char uname[32]; /* 265-296 */
char gname[32]; /* 297-328 */
char devmajor[8]; /* 329-336 */
char devminor[8]; /* 337-344 */
char prefix[155]; /* 345-499 */
char padding[12]; /* 500-512 */
} formated;
} tar;
long sum = 0;
long i;
char *tmp;
/* Align header */
data_align(archive_handle, 512);
if (archive_xread(archive_handle, tar.raw, 512) != 512) {
/* Assume end of file */
return(EXIT_FAILURE);
}
archive_handle->offset += 512;
/* If there is no filename its an empty header */
if (tar.formated.name[0] == 0) {
return(EXIT_SUCCESS);
}
/* Check header has valid magic, "ustar" is for the proper tar
* 0's are for the old tar format
*/
if (strncmp(tar.formated.magic, "ustar", 5) != 0) {
#ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
if (strncmp(tar.formated.magic, "\0\0\0\0\0", 5) != 0)
#endif
bb_error_msg_and_die("Invalid tar magic");
}
/* Do checksum on headers */
for (i = 0; i < 148 ; i++) {
sum += tar.raw[i];
}
sum += ' ' * 8;
for (i = 156; i < 512 ; i++) {
sum += tar.raw[i];
}
if (sum != strtol(tar.formated.chksum, NULL, 8)) {
bb_error_msg("Invalid tar header checksum");
return(EXIT_FAILURE);
}
#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
if (longname) {
file_header->name = longname;
longname = NULL;
}
else if (linkname) {
file_header->name = linkname;
linkname = NULL;
} else
#endif
if (tar.formated.prefix[0] == 0) {
file_header->name = strdup(tar.formated.name);
} else {
file_header->name = concat_path_file(tar.formated.prefix, tar.formated.name);
}
tmp = last_char_is(archive_handle->file_header->name, '/');
if (tmp) {
*tmp = '\0';
}
file_header->mode = strtol(tar.formated.mode, NULL, 8);
file_header->uid = strtol(tar.formated.uid, NULL, 8);
file_header->gid = strtol(tar.formated.gid, NULL, 8);
file_header->size = strtol(tar.formated.size, NULL, 8);
file_header->mtime = strtol(tar.formated.mtime, NULL, 8);
file_header->link_name = (tar.formated.linkname[0] != '\0') ?
bb_xstrdup(tar.formated.linkname) : NULL;
file_header->device = (dev_t) ((strtol(tar.formated.devmajor, NULL, 8) << 8) +
strtol(tar.formated.devminor, NULL, 8));
if (tar.formated.typeflag == '1') {
bb_error_msg("WARNING: Converting hard link to symlink");
file_header->mode |= S_IFLNK;
}
#if defined CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY || defined CONFIG_FEATURE_TAR_GNU_EXTENSIONS
/* Fix mode, used by the old format */
switch (tar.formated.typeflag) {
# ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
case 0:
case '0':
file_header->mode |= S_IFREG;
break;
case '1':
// bb_error_msg("Internal hard link not supported");
break;
case '2':
file_header->mode |= S_IFLNK;
break;
case '3':
file_header->mode |= S_IFCHR;
break;
case '4':
file_header->mode |= S_IFBLK;
break;
case '5':
file_header->mode |= S_IFDIR;
break;
case '6':
file_header->mode |= S_IFIFO;
break;
# endif
# ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
case 'L': {
longname = xmalloc(file_header->size + 1);
archive_xread_all(archive_handle, longname, file_header->size);
longname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
return(get_header_tar(archive_handle));
}
case 'K': {
linkname = xmalloc(file_header->size + 1);
archive_xread_all(archive_handle, linkname, file_header->size);
linkname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
file_header->name = linkname;
return(get_header_tar(archive_handle));
}
case 'D':
case 'M':
case 'N':
case 'S':
case 'V':
bb_error_msg("Ignoring GNU extension type %c", tar.formated.typeflag);
# endif
}
#endif
if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {
archive_handle->action_header(archive_handle->file_header);
archive_handle->flags |= ARCHIVE_EXTRACT_QUIET;
archive_handle->action_data(archive_handle);
archive_handle->passed = llist_add_to(archive_handle->passed, archive_handle->file_header->name);
} else {
data_skip(archive_handle);
}
archive_handle->offset += file_header->size;
return(EXIT_SUCCESS);
}
extern int unzip_main(int argc, char **argv)
{
union {
unsigned char raw[26];
struct {
unsigned short version; /* 0-1 */
unsigned short flags; /* 2-3 */
unsigned short method; /* 4-5 */
unsigned short modtime; /* 6-7 */
unsigned short moddate; /* 8-9 */
unsigned int crc32 __attribute__ ((packed)); /* 10-13 */
unsigned int cmpsize __attribute__ ((packed));; /* 14-17 */
unsigned int ucmpsize __attribute__ ((packed));; /* 18-21 */
unsigned short filename_len; /* 22-23 */
unsigned short extra_len; /* 24-25 */
} formated __attribute__ ((packed));
} zip_header;
archive_handle_t *archive_handle;
unsigned int total_size = 0;
unsigned int total_entries = 0;
char *base_dir = NULL;
int opt = 0;
/* Initialise */
archive_handle = init_handle();
archive_handle->action_data = NULL;
archive_handle->action_header = header_list_unzip;
while ((opt = getopt(argc, argv, "lnopqd:")) != -1) {
switch (opt) {
case 'l': /* list */
archive_handle->action_header = header_verbose_list_unzip;
archive_handle->action_data = data_skip;
break;
case 'n': /* never overwright existing files */
break;
case 'o':
archive_handle->flags = ARCHIVE_EXTRACT_UNCONDITIONAL;
break;
case 'p': /* extract files to stdout */
archive_handle->action_data = data_extract_to_stdout;
break;
case 'q': /* Extract files quietly */
archive_handle->action_header = header_skip;
break;
case 'd': /* Extract files to specified base directory*/
base_dir = optarg;
break;
#if 0
case 'x': /* Exclude the specified files */
archive_handle->filter = filter_accept_reject_list;
break;
#endif
default:
bb_show_usage();
}
}
if (argc == optind) {
bb_show_usage();
}
printf("Archive: %s\n", argv[optind]);
if (archive_handle->action_header == header_verbose_list_unzip) {
printf(" Length Date Time Name\n");
printf(" -------- ---- ---- ----\n");
}
if (*argv[optind] == '-') {
archive_handle->src_fd = fileno(stdin);
archive_handle->seek = seek_by_char;
} else {
archive_handle->src_fd = bb_xopen(argv[optind++], O_RDONLY);
}
if ((base_dir) && (chdir(base_dir))) {
bb_perror_msg_and_die("Couldnt chdir");
}
while (optind < argc) {
archive_handle->filter = filter_accept_list;
archive_handle->accept = llist_add_to(archive_handle->accept, argv[optind]);
optind++;
}
while (1) {
unsigned int magic;
int dst_fd;
/* TODO Endian issues */
archive_xread_all(archive_handle, &magic, 4);
archive_handle->offset += 4;
if (magic == ZIP_CDS_MAGIC) {
break;
}
else if (magic != ZIP_FILEHEADER_MAGIC) {
bb_error_msg_and_die("Invlaide zip magic");
}
/* Read the file header */
archive_xread_all(archive_handle, zip_header.raw, 26);
archive_handle->offset += 26;
archive_handle->file_header->mode = S_IFREG | 0777;
if (zip_header.formated.method != 8) {
bb_error_msg_and_die("Unsupported compression method %d\n", zip_header.formated.method);
}
/* Read filename */
archive_handle->file_header->name = xmalloc(zip_header.formated.filename_len + 1);
archive_xread_all(archive_handle, archive_handle->file_header->name, zip_header.formated.filename_len);
archive_handle->offset += zip_header.formated.filename_len;
archive_handle->file_header->name[zip_header.formated.filename_len] = '\0';
/* Skip extra header bits */
archive_handle->file_header->size = zip_header.formated.extra_len;
data_skip(archive_handle);
archive_handle->offset += zip_header.formated.extra_len;
/* Handle directories */
archive_handle->file_header->mode = S_IFREG | 0777;
if (last_char_is(archive_handle->file_header->name, '/')) {
archive_handle->file_header->mode ^= S_IFREG;
archive_handle->file_header->mode |= S_IFDIR;
}
/* Data section */
archive_handle->file_header->size = zip_header.formated.cmpsize;
if (archive_handle->action_data) {
archive_handle->action_data(archive_handle);
} else {
dst_fd = bb_xopen(archive_handle->file_header->name, O_WRONLY | O_CREAT);
inflate(archive_handle->src_fd, dst_fd);
close(dst_fd);
chmod(archive_handle->file_header->name, archive_handle->file_header->mode);
/* Validate decompression - crc */
if (zip_header.formated.crc32 != (gunzip_crc ^ 0xffffffffL)) {
bb_error_msg("Invalid compressed data--crc error");
}
/* Validate decompression - size */
if (gunzip_bytes_out != zip_header.formated.ucmpsize) {
bb_error_msg("Invalid compressed data--length error");
}
}
/* local file descriptor section */
archive_handle->offset += zip_header.formated.cmpsize;
/* This ISNT unix time */
archive_handle->file_header->mtime = zip_header.formated.modtime | (zip_header.formated.moddate << 16);
archive_handle->file_header->size = zip_header.formated.ucmpsize;
total_size += archive_handle->file_header->size;
total_entries++;
archive_handle->action_header(archive_handle->file_header);
/* Data descriptor section */
if (zip_header.formated.flags & 4) {
/* skip over duplicate crc, compressed size and uncompressed size */
unsigned short i;
for (i = 0; i != 12; i++) {
archive_xread_char(archive_handle);
}
archive_handle->offset += 12;
}
}
/* Central directory section */
if (archive_handle->action_header == header_verbose_list_unzip) {
printf(" -------- -------\n");
printf("%9d %d files\n", total_size, total_entries);
}
return(EXIT_SUCCESS);
}
extern char get_header_tar(archive_handle_t *archive_handle)
{
file_header_t *file_header = archive_handle->file_header;
union {
/* ustar header, Posix 1003.1 */
unsigned char raw[512];
struct {
char name[100]; /* 0-99 */
char mode[8]; /* 100-107 */
char uid[8]; /* 108-115 */
char gid[8]; /* 116-123 */
char size[12]; /* 124-135 */
char mtime[12]; /* 136-147 */
char chksum[8]; /* 148-155 */
char typeflag; /* 156-156 */
char linkname[100]; /* 157-256 */
char magic[6]; /* 257-262 */
char version[2]; /* 263-264 */
char uname[32]; /* 265-296 */
char gname[32]; /* 297-328 */
char devmajor[8]; /* 329-336 */
char devminor[8]; /* 337-344 */
char prefix[155]; /* 345-499 */
char padding[12]; /* 500-512 */
} formated;
} tar;
long sum = 0;
long i;
/* Align header */
data_align(archive_handle, 512);
if (bb_full_read(archive_handle->src_fd, tar.raw, 512) != 512) {
/* Assume end of file */
return(EXIT_FAILURE);
}
archive_handle->offset += 512;
/* If there is no filename its an empty header */
if (tar.formated.name[0] == 0) {
return(EXIT_SUCCESS);
}
/* Check header has valid magic, "ustar" is for the proper tar
* 0's are for the old tar format
*/
if (strncmp(tar.formated.magic, "ustar", 5) != 0) {
#ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
if (strncmp(tar.formated.magic, "\0\0\0\0\0", 5) != 0)
#endif
bb_error_msg_and_die("Invalid tar magic");
}
/* Do checksum on headers */
for (i = 0; i < 148 ; i++) {
sum += tar.raw[i];
}
sum += ' ' * 8;
for (i = 156; i < 512 ; i++) {
sum += tar.raw[i];
}
if (sum != strtol(tar.formated.chksum, NULL, 8)) {
bb_error_msg("Invalid tar header checksum");
return(EXIT_FAILURE);
}
#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
if (longname) {
file_header->name = longname;
longname = NULL;
}
else if (linkname) {
file_header->name = linkname;
linkname = NULL;
} else
#endif
if (tar.formated.prefix[0] == 0) {
file_header->name = strdup(tar.formated.name);
} else {
file_header->name = concat_path_file(tar.formated.prefix, tar.formated.name);
}
file_header->uid = strtol(tar.formated.uid, NULL, 8);
file_header->gid = strtol(tar.formated.gid, NULL, 8);
file_header->size = strtol(tar.formated.size, NULL, 8);
file_header->mtime = strtol(tar.formated.mtime, NULL, 8);
file_header->link_name = (tar.formated.linkname[0] != '\0') ?
bb_xstrdup(tar.formated.linkname) : NULL;
file_header->device = (dev_t) ((strtol(tar.formated.devmajor, NULL, 8) << 8) +
strtol(tar.formated.devminor, NULL, 8));
/* Set bits 0-11 of the files mode */
file_header->mode = 07777 & strtol(tar.formated.mode, NULL, 8);
/* Set bits 12-15 of the files mode */
switch (tar.formated.typeflag) {
/* busybox identifies hard links as being regular files with 0 size and a link name */
case '1':
file_header->mode |= S_IFREG;
break;
case 'x':
case 'g':
bb_error_msg_and_die("pax is not tar");
break;
case '7':
/* Reserved for high performance files, treat as normal file */
case 0:
case '0':
#ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
if (last_char_is(file_header->name, '/')) {
file_header->mode |= S_IFDIR;
} else
#endif
file_header->mode |= S_IFREG;
break;
case '2':
file_header->mode |= S_IFLNK;
break;
case '3':
file_header->mode |= S_IFCHR;
break;
case '4':
file_header->mode |= S_IFBLK;
break;
case '5':
file_header->mode |= S_IFDIR;
break;
case '6':
file_header->mode |= S_IFIFO;
break;
#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
case 'L': {
longname = xmalloc(file_header->size + 1);
archive_xread_all(archive_handle, longname, file_header->size);
longname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
return(get_header_tar(archive_handle));
}
case 'K': {
linkname = xmalloc(file_header->size + 1);
archive_xread_all(archive_handle, linkname, file_header->size);
linkname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
file_header->name = linkname;
return(get_header_tar(archive_handle));
}
case 'D': /* GNU dump dir */
case 'M': /* Continuation of multi volume archive*/
case 'N': /* Old GNU for names > 100 characters */
case 'S': /* Sparse file */
case 'V': /* Volume header */
bb_error_msg("Ignoring GNU extension type %c", tar.formated.typeflag);
#endif
default:
bb_error_msg("Unknown typeflag: 0x%x", tar.formated.typeflag);
}
{ /* Strip trailing '/' in directories */
/* Must be done after mode is set as '/' is used to check if its a directory */
char *tmp = last_char_is(file_header->name, '/');
if (tmp) {
*tmp = '\0';
}
}
if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {
archive_handle->action_header(archive_handle->file_header);
archive_handle->flags |= ARCHIVE_EXTRACT_QUIET;
archive_handle->action_data(archive_handle);
archive_handle->passed = llist_add_to(archive_handle->passed, file_header->name);
} else {
data_skip(archive_handle);
}
archive_handle->offset += file_header->size;
free(file_header->link_name);
return(EXIT_SUCCESS);
}
