*
*/
+/* For reference to format see http://www.pkware.com/support/appnote.html */
+
+/* TODO Endian issues, exclude, should we accept input from stdin ? */
+
#include <fcntl.h>
#include <getopt.h>
#include <stdlib.h>
#include "unarchive.h"
#include "busybox.h"
+#define ZIP_FILEHEADER_MAGIC 0x04034b50
+#define ZIP_CDS_MAGIC 0x02014b50
+#define ZIP_CDS_END_MAGIC 0x06054b50
+#define ZIP_DD_MAGIC 0x08074b50
+
+extern unsigned int gunzip_crc;
+extern unsigned int gunzip_bytes_out;
+
+static void header_list_unzip(const file_header_t *file_header)
+{
+ printf(" inflating: %s\n", file_header->name);
+}
+
+static void header_verbose_list_unzip(const file_header_t *file_header)
+{
+ unsigned int dostime = (unsigned int) file_header->mtime;
+
+ /* can printf arguments cut of the decade component ? */
+ unsigned short year = 1980 + ((dostime & 0xfe000000) >> 25);
+ while (year >= 100) {
+ year -= 100;
+ }
+
+ printf("%9u %02u-%02u-%02u %02u:%02u %s\n",
+ (unsigned int) file_header->size,
+ (dostime & 0x01e00000) >> 21,
+ (dostime & 0x001f0000) >> 16,
+ year,
+ (dostime & 0x0000f800) >> 11,
+ (dostime & 0x000007e0) >> 5,
+ file_header->name);
+}
+
extern int unzip_main(int argc, char **argv)
{
- FILE *src_stream;
- int extract_function = extract_all_to_fs | extract_create_leading_dirs;
- char **extract_names = NULL;
- char **exclude_names = NULL;
+ 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;
- int num_of_entries = 0;
- int exclude = 0;
- char *outdir = "./";
- FILE *msgout = stdout;
- while ((opt = getopt(argc, argv, "lnopqxd:")) != -1) {
+ /* 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':
- extract_function |= extract_verbose_list;
- extract_function ^= extract_all_to_fs;
+ case 'l': /* list */
+ archive_handle->action_header = header_verbose_list_unzip;
+ archive_handle->action_data = data_skip;
break;
- case 'n':
+ case 'n': /* never overwright existing files */
break;
case 'o':
- extract_function |= extract_unconditional;
+ archive_handle->flags = ARCHIVE_EXTRACT_UNCONDITIONAL;
break;
- case 'p':
- extract_function |= extract_to_stdout;
- extract_function ^= extract_all_to_fs;
- /* FALLTHROUGH */
- case 'q':
- msgout = xfopen("/dev/null", "w");
+ case 'p': /* extract files to stdout */
+ archive_handle->action_data = data_extract_to_stdout;
break;
- case 'd':
- outdir = xstrdup(optarg);
- strcat(outdir, "/");
+ case 'q': /* Extract files quietly */
+ archive_handle->action_header = header_skip;
break;
- case 'x':
- exclude = 1;
+ 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:
+ show_usage();
}
}
- if (optind == argc) {
+ if (argc == optind) {
show_usage();
}
- if (*argv[optind] == '-') src_stream = stdin;
- else src_stream = xfopen(argv[optind++], "r");
+ printf("Archive: %s\n", argv[optind]);
+ if (archive_handle->action_header == header_verbose_list_unzip) {
+ printf(" Length Date Time Name\n");
+ printf(" -------- ---- ---- ----\n");
+ }
- while (optind < argc) {
- if (exclude) {
- exclude_names = xrealloc(exclude_names, sizeof(char *) * (num_of_entries + 2));
- exclude_names[num_of_entries] = xstrdup(argv[optind]);
+ if (*argv[optind] == '-') {
+ archive_handle->src_fd = fileno(stdin);
} else {
- extract_names = xrealloc(extract_names, sizeof(char *) * (num_of_entries + 2));
- extract_names[num_of_entries] = xstrdup(argv[optind]);
+ archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
}
- num_of_entries++;
- if (exclude) exclude_names[num_of_entries] = NULL;
- else extract_names[num_of_entries] = NULL;
+
+ if ((base_dir) && (chdir(base_dir))) {
+ perror_msg_and_die("Couldnt chdir");
+ }
+
+ while (optind < argc) {
+ archive_handle->filter = filter_accept_list;
+ archive_handle->accept = add_to_list(archive_handle->accept, argv[optind]);
optind++;
}
- unarchive(src_stream, msgout, &get_header_zip, extract_function, outdir, extract_names, exclude_names);
- return EXIT_SUCCESS;
+ while (1) {
+ unsigned int magic;
+ int dst_fd;
+
+ /* TODO Endian issues */
+ xread_all(archive_handle->src_fd, &magic, 4);
+ archive_handle->offset += 4;
+
+ if (magic == ZIP_CDS_MAGIC) {
+ break;
+ }
+ else if (magic != ZIP_FILEHEADER_MAGIC) {
+ error_msg_and_die("Invlaide zip magic");
+ }
+
+ /* Read the file header */
+ xread_all(archive_handle->src_fd, zip_header.raw, 26);
+ archive_handle->offset += 26;
+ archive_handle->file_header->mode = S_IFREG | 0777;
+
+ if (zip_header.formated.method != 8) {
+ 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);
+ xread_all(archive_handle->src_fd, 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 = 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)) {
+ error_msg("Invalid compressed data--crc error");
+ }
+
+ /* Validate decompression - size */
+ if (gunzip_bytes_out != zip_header.formated.ucmpsize) {
+ 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++) {
+ xread_char(archive_handle->src_fd);
+ }
+ 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);
}
projects / oweals / busybox.git / blobdiff