/*
* Mini unzip implementation for busybox
*
- * Copyright (C) 2001 by Laurence Anderson
+ * Copyright (C) 2004 by Ed Clark
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Loosely based on original busybox unzip applet by Laurence Anderson.
+ * All options and features should work in this version.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* For reference see
+ * http://www.pkware.com/company/standards/appnote/
+ * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
*
+ * TODO
+ * Zip64 + other methods
+ */
+
+//config:config UNZIP
+//config: bool "unzip"
+//config: default y
+//config: help
+//config: unzip will list or extract files from a ZIP archive,
+//config: commonly found on DOS/WIN systems. The default behavior
+//config: (with no options) is to extract the archive into the
+//config: current directory. Use the `-d' option to extract to a
+//config: directory of your choice.
+
+//applet:IF_UNZIP(APPLET(unzip, BB_DIR_USR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_UNZIP) += unzip.o
+
+//usage:#define unzip_trivial_usage
+//usage: "[-lnopq] FILE[.zip] [FILE]... [-x FILE...] [-d DIR]"
+//usage:#define unzip_full_usage "\n\n"
+//usage: "Extract FILEs from ZIP archive\n"
+//usage: "\n -l List contents (with -q for short form)"
+//usage: "\n -n Never overwrite files (default: ask)"
+//usage: "\n -o Overwrite"
+//usage: "\n -p Print to stdout"
+//usage: "\n -q Quiet"
+//usage: "\n -x FILE Exclude FILEs"
+//usage: "\n -d DIR Extract into DIR"
+
+#include "libbb.h"
+#include "bb_archive.h"
+
+enum {
+#if BB_BIG_ENDIAN
+ ZIP_FILEHEADER_MAGIC = 0x504b0304,
+ ZIP_CDF_MAGIC = 0x504b0102, /* central directory's file header */
+ ZIP_CDE_MAGIC = 0x504b0506, /* "end of central directory" record */
+ ZIP_DD_MAGIC = 0x504b0708,
+#else
+ ZIP_FILEHEADER_MAGIC = 0x04034b50,
+ ZIP_CDF_MAGIC = 0x02014b50,
+ ZIP_CDE_MAGIC = 0x06054b50,
+ ZIP_DD_MAGIC = 0x08074b50,
+#endif
+};
+
+#define ZIP_HEADER_LEN 26
+
+typedef union {
+ uint8_t raw[ZIP_HEADER_LEN];
+ struct {
+ uint16_t version; /* 0-1 */
+ uint16_t zip_flags; /* 2-3 */
+ uint16_t method; /* 4-5 */
+ uint16_t modtime; /* 6-7 */
+ uint16_t moddate; /* 8-9 */
+ uint32_t crc32 PACKED; /* 10-13 */
+ uint32_t cmpsize PACKED; /* 14-17 */
+ uint32_t ucmpsize PACKED; /* 18-21 */
+ uint16_t filename_len; /* 22-23 */
+ uint16_t extra_len; /* 24-25 */
+ } formatted PACKED;
+} zip_header_t; /* PACKED - gcc 4.2.1 doesn't like it (spews warning) */
+
+/* Check the offset of the last element, not the length. This leniency
+ * allows for poor packing, whereby the overall struct may be too long,
+ * even though the elements are all in the right place.
+ */
+struct BUG_zip_header_must_be_26_bytes {
+ char BUG_zip_header_must_be_26_bytes[
+ offsetof(zip_header_t, formatted.extra_len) + 2
+ == ZIP_HEADER_LEN ? 1 : -1];
+};
+
+#define FIX_ENDIANNESS_ZIP(zip_header) do { \
+ (zip_header).formatted.version = SWAP_LE16((zip_header).formatted.version ); \
+ (zip_header).formatted.method = SWAP_LE16((zip_header).formatted.method ); \
+ (zip_header).formatted.modtime = SWAP_LE16((zip_header).formatted.modtime ); \
+ (zip_header).formatted.moddate = SWAP_LE16((zip_header).formatted.moddate ); \
+ (zip_header).formatted.crc32 = SWAP_LE32((zip_header).formatted.crc32 ); \
+ (zip_header).formatted.cmpsize = SWAP_LE32((zip_header).formatted.cmpsize ); \
+ (zip_header).formatted.ucmpsize = SWAP_LE32((zip_header).formatted.ucmpsize ); \
+ (zip_header).formatted.filename_len = SWAP_LE16((zip_header).formatted.filename_len); \
+ (zip_header).formatted.extra_len = SWAP_LE16((zip_header).formatted.extra_len ); \
+} while (0)
+
+#define CDF_HEADER_LEN 42
+
+typedef union {
+ uint8_t raw[CDF_HEADER_LEN];
+ struct {
+ /* uint32_t signature; 50 4b 01 02 */
+ uint16_t version_made_by; /* 0-1 */
+ uint16_t version_needed; /* 2-3 */
+ uint16_t cdf_flags; /* 4-5 */
+ uint16_t method; /* 6-7 */
+ uint16_t mtime; /* 8-9 */
+ uint16_t mdate; /* 10-11 */
+ uint32_t crc32; /* 12-15 */
+ uint32_t cmpsize; /* 16-19 */
+ uint32_t ucmpsize; /* 20-23 */
+ uint16_t file_name_length; /* 24-25 */
+ uint16_t extra_field_length; /* 26-27 */
+ uint16_t file_comment_length; /* 28-29 */
+ uint16_t disk_number_start; /* 30-31 */
+ uint16_t internal_file_attributes; /* 32-33 */
+ uint32_t external_file_attributes PACKED; /* 34-37 */
+ uint32_t relative_offset_of_local_header PACKED; /* 38-41 */
+ } formatted PACKED;
+} cdf_header_t;
+
+struct BUG_cdf_header_must_be_42_bytes {
+ char BUG_cdf_header_must_be_42_bytes[
+ offsetof(cdf_header_t, formatted.relative_offset_of_local_header) + 4
+ == CDF_HEADER_LEN ? 1 : -1];
+};
+
+#define FIX_ENDIANNESS_CDF(cdf_header) do { \
+ (cdf_header).formatted.crc32 = SWAP_LE32((cdf_header).formatted.crc32 ); \
+ (cdf_header).formatted.cmpsize = SWAP_LE32((cdf_header).formatted.cmpsize ); \
+ (cdf_header).formatted.ucmpsize = SWAP_LE32((cdf_header).formatted.ucmpsize ); \
+ (cdf_header).formatted.file_name_length = SWAP_LE16((cdf_header).formatted.file_name_length); \
+ (cdf_header).formatted.extra_field_length = SWAP_LE16((cdf_header).formatted.extra_field_length); \
+ (cdf_header).formatted.file_comment_length = SWAP_LE16((cdf_header).formatted.file_comment_length); \
+ IF_DESKTOP( \
+ (cdf_header).formatted.version_made_by = SWAP_LE16((cdf_header).formatted.version_made_by); \
+ (cdf_header).formatted.external_file_attributes = SWAP_LE32((cdf_header).formatted.external_file_attributes); \
+ ) \
+} while (0)
+
+#define CDE_HEADER_LEN 16
+
+typedef union {
+ uint8_t raw[CDE_HEADER_LEN];
+ struct {
+ /* uint32_t signature; 50 4b 05 06 */
+ uint16_t this_disk_no;
+ uint16_t disk_with_cdf_no;
+ uint16_t cdf_entries_on_this_disk;
+ uint16_t cdf_entries_total;
+ uint32_t cdf_size;
+ uint32_t cdf_offset;
+ /* uint16_t file_comment_length; */
+ /* .ZIP file comment (variable size) */
+ } formatted PACKED;
+} cde_header_t;
+
+struct BUG_cde_header_must_be_16_bytes {
+ char BUG_cde_header_must_be_16_bytes[
+ sizeof(cde_header_t) == CDE_HEADER_LEN ? 1 : -1];
+};
+
+#define FIX_ENDIANNESS_CDE(cde_header) do { \
+ (cde_header).formatted.cdf_offset = SWAP_LE32((cde_header).formatted.cdf_offset); \
+} while (0)
+
+enum { zip_fd = 3 };
+
+
+#if ENABLE_DESKTOP
+
+/* Seen in the wild:
+ * Self-extracting PRO2K3XP_32.exe contains 19078464 byte zip archive,
+ * where CDE was nearly 48 kbytes before EOF.
+ * (Surprisingly, it also apparently has *another* CDE structure
+ * closer to the end, with bogus cdf_offset).
+ * To make extraction work, bumped PEEK_FROM_END from 16k to 64k.
*/
+#define PEEK_FROM_END (64*1024)
+
+/* This value means that we failed to find CDF */
+#define BAD_CDF_OFFSET ((uint32_t)0xffffffff)
+
+/* NB: does not preserve file position! */
+static uint32_t find_cdf_offset(void)
+{
+ cde_header_t cde_header;
+ unsigned char *p;
+ off_t end;
+ unsigned char *buf = xzalloc(PEEK_FROM_END);
+
+ end = xlseek(zip_fd, 0, SEEK_END);
+ end -= PEEK_FROM_END;
+ if (end < 0)
+ end = 0;
+ xlseek(zip_fd, end, SEEK_SET);
+ full_read(zip_fd, buf, PEEK_FROM_END);
+
+ cde_header.formatted.cdf_offset = BAD_CDF_OFFSET;
+ p = buf;
+ while (p <= buf + PEEK_FROM_END - CDE_HEADER_LEN - 4) {
+ if (*p != 'P') {
+ p++;
+ continue;
+ }
+ if (*++p != 'K')
+ continue;
+ if (*++p != 5)
+ continue;
+ if (*++p != 6)
+ continue;
+ /* we found CDE! */
+ memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
+ FIX_ENDIANNESS_CDE(cde_header);
+ /*
+ * I've seen .ZIP files with seemingly valid CDEs
+ * where cdf_offset points past EOF - ??
+ * Ignore such CDEs:
+ */
+ if (cde_header.formatted.cdf_offset < end + (p - buf))
+ break;
+ cde_header.formatted.cdf_offset = BAD_CDF_OFFSET;
+ }
+ free(buf);
+ return cde_header.formatted.cdf_offset;
+};
-/* For reference to format see http://www.pkware.com/support/appnote.html */
+static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf_ptr)
+{
+ off_t org;
-/* TODO Endian issues, exclude, should we accept input from stdin ? */
+ org = xlseek(zip_fd, 0, SEEK_CUR);
-#include <fcntl.h>
-#include <getopt.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "unarchive.h"
-#include "busybox.h"
+ if (!cdf_offset)
+ cdf_offset = find_cdf_offset();
-#define ZIP_FILEHEADER_MAGIC 0x04034b50
-#define ZIP_CDS_MAGIC 0x02014b50
-#define ZIP_CDS_END_MAGIC 0x06054b50
-#define ZIP_DD_MAGIC 0x08074b50
+ if (cdf_offset != BAD_CDF_OFFSET) {
+ xlseek(zip_fd, cdf_offset + 4, SEEK_SET);
+ xread(zip_fd, cdf_ptr->raw, CDF_HEADER_LEN);
+ FIX_ENDIANNESS_CDF(*cdf_ptr);
+ cdf_offset += 4 + CDF_HEADER_LEN
+ + cdf_ptr->formatted.file_name_length
+ + cdf_ptr->formatted.extra_field_length
+ + cdf_ptr->formatted.file_comment_length;
+ }
-extern unsigned int gunzip_crc;
-extern unsigned int gunzip_bytes_out;
+ xlseek(zip_fd, org, SEEK_SET);
+ return cdf_offset;
+};
+#endif
-static void header_list_unzip(const file_header_t *file_header)
+static void unzip_skip(off_t skip)
{
- printf(" inflating: %s\n", file_header->name);
+ if (skip != 0)
+ if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
+ bb_copyfd_exact_size(zip_fd, -1, skip);
}
-static void header_verbose_list_unzip(const file_header_t *file_header)
+static void unzip_create_leading_dirs(const char *fn)
{
- unsigned int dostime = (unsigned int) file_header->mtime;
+ /* Create all leading directories */
+ char *name = xstrdup(fn);
+ if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
+ xfunc_die(); /* bb_make_directory is noisy */
+ }
+ free(name);
+}
- /* can printf arguments cut of the decade component ? */
- unsigned short year = 1980 + ((dostime & 0xfe000000) >> 25);
- while (year >= 100) {
- year -= 100;
+static void unzip_extract(zip_header_t *zip_header, int dst_fd)
+{
+ if (zip_header->formatted.method == 0) {
+ /* Method 0 - stored (not compressed) */
+ off_t size = zip_header->formatted.ucmpsize;
+ if (size)
+ bb_copyfd_exact_size(zip_fd, dst_fd, size);
+ } else {
+ /* Method 8 - inflate */
+ transformer_aux_data_t aux;
+ init_transformer_aux_data(&aux);
+ aux.bytes_in = zip_header->formatted.cmpsize;
+ if (inflate_unzip(&aux, zip_fd, dst_fd) < 0)
+ bb_error_msg_and_die("inflate error");
+ /* Validate decompression - crc */
+ if (zip_header->formatted.crc32 != (aux.crc32 ^ 0xffffffffL)) {
+ bb_error_msg_and_die("crc error");
+ }
+ /* Validate decompression - size */
+ if (zip_header->formatted.ucmpsize != aux.bytes_out) {
+ /* Don't die. Who knows, maybe len calculation
+ * was botched somewhere. After all, crc matched! */
+ bb_error_msg("bad length");
+ }
}
+}
- 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);
+static void my_fgets80(char *buf80)
+{
+ fflush_all();
+ if (!fgets(buf80, 80, stdin)) {
+ bb_perror_msg_and_die("can't read standard input");
+ }
}
-extern int unzip_main(int argc, char **argv)
+int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+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;
+ enum { O_PROMPT, O_NEVER, O_ALWAYS };
+
+ zip_header_t zip_header;
+ smallint quiet = 0;
+ IF_NOT_DESKTOP(const) smallint verbose = 0;
+ smallint listing = 0;
+ smallint overwrite = O_PROMPT;
+ smallint x_opt_seen;
+#if ENABLE_DESKTOP
+ uint32_t cdf_offset;
+#endif
+ unsigned long total_usize;
+ unsigned long total_size;
+ unsigned total_entries;
+ int dst_fd = -1;
+ char *src_fn = NULL;
+ char *dst_fn = NULL;
+ llist_t *zaccept = NULL;
+ llist_t *zreject = NULL;
char *base_dir = NULL;
- int opt = 0;
+ int i, opt;
+ char key_buf[80]; /* must match size used by my_fgets80 */
+ struct stat stat_buf;
- /* Initialise */
- archive_handle = init_handle();
- archive_handle->action_data = NULL;
- archive_handle->action_header = header_list_unzip;
+/* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
+ *
+ * # /usr/bin/unzip -qq -v decompress_unlzma.i.zip
+ * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
+ * # /usr/bin/unzip -q -v decompress_unlzma.i.zip
+ * Length Method Size Ratio Date Time CRC-32 Name
+ * -------- ------ ------- ----- ---- ---- ------ ----
+ * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
+ * -------- ------- --- -------
+ * 204372 35278 83% 1 file
+ * # /usr/bin/unzip -v decompress_unlzma.i.zip
+ * Archive: decompress_unlzma.i.zip
+ * Length Method Size Ratio Date Time CRC-32 Name
+ * -------- ------ ------- ----- ---- ---- ------ ----
+ * 204372 Defl:N 35278 83% 09-06-09 14:23 0d056252 decompress_unlzma.i
+ * -------- ------- --- -------
+ * 204372 35278 83% 1 file
+ * # unzip -v decompress_unlzma.i.zip
+ * Archive: decompress_unlzma.i.zip
+ * Length Date Time Name
+ * -------- ---- ---- ----
+ * 204372 09-06-09 14:23 decompress_unlzma.i
+ * -------- -------
+ * 204372 1 files
+ * # /usr/bin/unzip -l -qq decompress_unlzma.i.zip
+ * 204372 09-06-09 14:23 decompress_unlzma.i
+ * # /usr/bin/unzip -l -q decompress_unlzma.i.zip
+ * Length Date Time Name
+ * -------- ---- ---- ----
+ * 204372 09-06-09 14:23 decompress_unlzma.i
+ * -------- -------
+ * 204372 1 file
+ * # /usr/bin/unzip -l decompress_unlzma.i.zip
+ * Archive: decompress_unlzma.i.zip
+ * Length Date Time Name
+ * -------- ---- ---- ----
+ * 204372 09-06-09 14:23 decompress_unlzma.i
+ * -------- -------
+ * 204372 1 file
+ */
- while ((opt = getopt(argc, argv, "lnopqd:")) != -1) {
+ x_opt_seen = 0;
+ /* '-' makes getopt return 1 for non-options */
+ while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -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:
- show_usage();
+ case 'd': /* Extract to base directory */
+ base_dir = optarg;
+ break;
+
+ case 'l': /* List */
+ listing = 1;
+ break;
+
+ case 'n': /* Never overwrite existing files */
+ overwrite = O_NEVER;
+ break;
+
+ case 'o': /* Always overwrite existing files */
+ overwrite = O_ALWAYS;
+ break;
+
+ case 'p': /* Extract files to stdout and fall through to set verbosity */
+ dst_fd = STDOUT_FILENO;
+
+ case 'q': /* Be quiet */
+ quiet++;
+ break;
+
+ case 'v': /* Verbose list */
+ IF_DESKTOP(verbose++;)
+ listing = 1;
+ break;
+
+ case 'x':
+ x_opt_seen = 1;
+ break;
+
+ case 1:
+ if (!src_fn) {
+ /* The zip file */
+ /* +5: space for ".zip" and NUL */
+ src_fn = xmalloc(strlen(optarg) + 5);
+ strcpy(src_fn, optarg);
+ } else if (!x_opt_seen) {
+ /* Include files */
+ llist_add_to(&zaccept, optarg);
+ } else {
+ /* Exclude files */
+ llist_add_to(&zreject, optarg);
+ }
+ break;
+
+ default:
+ bb_show_usage();
}
}
- if (argc == optind) {
- show_usage();
+#ifndef __GLIBC__
+ /*
+ * This code is needed for non-GNU getopt
+ * which doesn't understand "-" in option string.
+ * The -x option won't work properly in this case:
+ * "unzip a.zip q -x w e" will be interpreted as
+ * "unzip a.zip q w e -x" = "unzip a.zip q w e"
+ */
+ argv += optind;
+ if (argv[0]) {
+ /* +5: space for ".zip" and NUL */
+ src_fn = xmalloc(strlen(argv[0]) + 5);
+ strcpy(src_fn, argv[0]);
+ while (*++argv)
+ llist_add_to(&zaccept, *argv);
}
+#endif
- printf("Archive: %s\n", argv[optind]);
- if (archive_handle->action_header == header_verbose_list_unzip) {
- printf(" Length Date Time Name\n");
- printf(" -------- ---- ---- ----\n");
+ if (!src_fn) {
+ bb_show_usage();
}
- if (*argv[optind] == '-') {
- archive_handle->src_fd = fileno(stdin);
- } else {
- archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
+ /* Open input file */
+ if (LONE_DASH(src_fn)) {
+ xdup2(STDIN_FILENO, zip_fd);
+ /* Cannot use prompt mode since zip data is arriving on STDIN */
+ if (overwrite == O_PROMPT)
+ overwrite = O_NEVER;
+ } else {
+ static const char extn[][5] = { ".zip", ".ZIP" };
+ char *ext = src_fn + strlen(src_fn);
+ int src_fd;
+
+ i = 0;
+ for (;;) {
+ src_fd = open(src_fn, O_RDONLY);
+ if (src_fd >= 0)
+ break;
+ if (++i > 2) {
+ *ext = '\0';
+ bb_error_msg_and_die("can't open %s[.zip]", src_fn);
+ }
+ strcpy(ext, extn[i - 1]);
}
+ xmove_fd(src_fd, zip_fd);
+ }
- if ((base_dir) && (chdir(base_dir))) {
- perror_msg_and_die("Couldnt chdir");
+ /* Change dir if necessary */
+ if (base_dir)
+ xchdir(base_dir);
+
+ if (quiet <= 1) { /* not -qq */
+ if (quiet == 0)
+ printf("Archive: %s\n", src_fn);
+ if (listing) {
+ puts(verbose ?
+ " Length Method Size Ratio Date Time CRC-32 Name\n"
+ "-------- ------ ------- ----- ---- ---- ------ ----"
+ :
+ " Length Date Time Name\n"
+ " -------- ---- ---- ----"
+ );
}
-
- while (optind < argc) {
- archive_handle->filter = filter_accept_list;
- archive_handle->accept = add_to_list(archive_handle->accept, argv[optind]);
- optind++;
}
+/* Example of an archive with one 0-byte long file named 'z'
+ * created by Zip 2.31 on Unix:
+ * 0000 [50 4b]03 04 0a 00 00 00 00 00 42 1a b8 3c 00 00 |PK........B..<..|
+ * sig........ vneed flags compr mtime mdate crc32>
+ * 0010 00 00 00 00 00 00 00 00 00 00 01 00 15 00 7a 55 |..............zU|
+ * >..... csize...... usize...... fnlen exlen fn ex>
+ * 0020 54 09 00 03 cc d3 f9 4b cc d3 f9 4b 55 78 04 00 |T......K...KUx..|
+ * >tra_field......................................
+ * 0030 00 00 00 00[50 4b]01 02 17 03 0a 00 00 00 00 00 |....PK..........|
+ * ........... sig........ vmade vneed flags compr
+ * 0040 42 1a b8 3c 00 00 00 00 00 00 00 00 00 00 00 00 |B..<............|
+ * mtime mdate crc32...... csize...... usize......
+ * 0050 01 00 0d 00 00 00 00 00 00 00 00 00 a4 81 00 00 |................|
+ * fnlen exlen clen. dnum. iattr eattr...... relofs> (eattr = rw-r--r--)
+ * 0060 00 00 7a 55 54 05 00 03 cc d3 f9 4b 55 78 00 00 |..zUT......KUx..|
+ * >..... fn extra_field...........................
+ * 0070 [50 4b]05 06 00 00 00 00 01 00 01 00 3c 00 00 00 |PK..........<...|
+ * 0080 34 00 00 00 00 00 |4.....|
+ */
+ total_usize = 0;
+ total_size = 0;
+ total_entries = 0;
+#if ENABLE_DESKTOP
+ cdf_offset = 0;
+#endif
while (1) {
- unsigned int magic;
- int dst_fd;
-
- /* TODO Endian issues */
- xread_all(archive_handle->src_fd, &magic, 4);
- archive_handle->offset += 4;
+ uint32_t magic;
+ mode_t dir_mode = 0777;
+#if ENABLE_DESKTOP
+ mode_t file_mode = 0666;
+#endif
- if (magic == ZIP_CDS_MAGIC) {
+ /* Check magic number */
+ xread(zip_fd, &magic, 4);
+ /* Central directory? It's at the end, so exit */
+ if (magic == ZIP_CDF_MAGIC)
break;
+#if ENABLE_DESKTOP
+ /* Data descriptor? It was a streaming file, go on */
+ if (magic == ZIP_DD_MAGIC) {
+ /* skip over duplicate crc32, cmpsize and ucmpsize */
+ unzip_skip(3 * 4);
+ continue;
}
- else if (magic != ZIP_FILEHEADER_MAGIC) {
- error_msg_and_die("Invlaide zip magic");
- }
+#endif
+ if (magic != ZIP_FILEHEADER_MAGIC)
+ bb_error_msg_and_die("invalid zip magic %08X", (int)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);
+ xread(zip_fd, zip_header.raw, ZIP_HEADER_LEN);
+ FIX_ENDIANNESS_ZIP(zip_header);
+ if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
+ bb_error_msg_and_die("unsupported method %d", zip_header.formatted.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;
+#if !ENABLE_DESKTOP
+ if (zip_header.formatted.zip_flags & SWAP_LE16(0x0009)) {
+ bb_error_msg_and_die("zip flags 1 and 8 are not supported");
+ }
+#else
+ if (zip_header.formatted.zip_flags & SWAP_LE16(0x0001)) {
+ /* 0x0001 - encrypted */
+ bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
}
- /* 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");
+ if (cdf_offset != BAD_CDF_OFFSET) {
+ cdf_header_t cdf_header;
+ cdf_offset = read_next_cdf(cdf_offset, &cdf_header);
+ /*
+ * Note: cdf_offset can become BAD_CDF_OFFSET after the above call.
+ */
+ if (zip_header.formatted.zip_flags & SWAP_LE16(0x0008)) {
+ /* 0x0008 - streaming. [u]cmpsize can be reliably gotten
+ * only from Central Directory. See unzip_doc.txt
+ */
+ zip_header.formatted.crc32 = cdf_header.formatted.crc32;
+ zip_header.formatted.cmpsize = cdf_header.formatted.cmpsize;
+ zip_header.formatted.ucmpsize = cdf_header.formatted.ucmpsize;
+ }
+ if ((cdf_header.formatted.version_made_by >> 8) == 3) {
+ /* This archive is created on Unix */
+ dir_mode = file_mode = (cdf_header.formatted.external_file_attributes >> 16);
}
+ }
+ if (cdf_offset == BAD_CDF_OFFSET
+ && (zip_header.formatted.zip_flags & SWAP_LE16(0x0008))
+ ) {
+ /* If it's a streaming zip, we _require_ CDF */
+ bb_error_msg_and_die("can't find file table");
+ }
+#endif
- /* Validate decompression - size */
- if (gunzip_bytes_out != zip_header.formated.ucmpsize) {
- error_msg("Invalid compressed data--length error");
+ /* Read filename */
+ free(dst_fn);
+ dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
+ xread(zip_fd, dst_fn, zip_header.formatted.filename_len);
+
+ /* Skip extra header bytes */
+ unzip_skip(zip_header.formatted.extra_len);
+
+ /* Filter zip entries */
+ if (find_list_entry(zreject, dst_fn)
+ || (zaccept && !find_list_entry(zaccept, dst_fn))
+ ) { /* Skip entry */
+ i = 'n';
+
+ } else { /* Extract entry */
+ if (listing) { /* List entry */
+ unsigned dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
+ if (!verbose) {
+ // " Length Date Time Name\n"
+ // " -------- ---- ---- ----"
+ printf( "%9u %02u-%02u-%02u %02u:%02u %s\n",
+ (unsigned)zip_header.formatted.ucmpsize,
+ (dostime & 0x01e00000) >> 21,
+ (dostime & 0x001f0000) >> 16,
+ (((dostime & 0xfe000000) >> 25) + 1980) % 100,
+ (dostime & 0x0000f800) >> 11,
+ (dostime & 0x000007e0) >> 5,
+ dst_fn);
+ total_usize += zip_header.formatted.ucmpsize;
+ } else {
+ unsigned long percents = zip_header.formatted.ucmpsize - zip_header.formatted.cmpsize;
+ percents = percents * 100;
+ if (zip_header.formatted.ucmpsize)
+ percents /= zip_header.formatted.ucmpsize;
+ // " Length Method Size Ratio Date Time CRC-32 Name\n"
+ // "-------- ------ ------- ----- ---- ---- ------ ----"
+ printf( "%8u Defl:N" "%9u%4u%% %02u-%02u-%02u %02u:%02u %08x %s\n",
+ (unsigned)zip_header.formatted.ucmpsize,
+ (unsigned)zip_header.formatted.cmpsize,
+ (unsigned)percents,
+ (dostime & 0x01e00000) >> 21,
+ (dostime & 0x001f0000) >> 16,
+ (((dostime & 0xfe000000) >> 25) + 1980) % 100,
+ (dostime & 0x0000f800) >> 11,
+ (dostime & 0x000007e0) >> 5,
+ zip_header.formatted.crc32,
+ dst_fn);
+ total_usize += zip_header.formatted.ucmpsize;
+ total_size += zip_header.formatted.cmpsize;
+ }
+ i = 'n';
+ } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
+ i = -1;
+ } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
+ if (stat(dst_fn, &stat_buf) == -1) {
+ if (errno != ENOENT) {
+ bb_perror_msg_and_die("can't stat '%s'", dst_fn);
+ }
+ if (!quiet) {
+ printf(" creating: %s\n", dst_fn);
+ }
+ unzip_create_leading_dirs(dst_fn);
+ if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
+ xfunc_die();
+ }
+ } else {
+ if (!S_ISDIR(stat_buf.st_mode)) {
+ bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
+ }
+ }
+ i = 'n';
+
+ } else { /* Extract file */
+ check_file:
+ if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
+ if (errno != ENOENT) {
+ bb_perror_msg_and_die("can't stat '%s'", dst_fn);
+ }
+ i = 'y';
+ } else { /* File already exists */
+ if (overwrite == O_NEVER) {
+ i = 'n';
+ } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
+ if (overwrite == O_ALWAYS) {
+ i = 'y';
+ } else {
+ printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
+ my_fgets80(key_buf);
+ i = key_buf[0];
+ }
+ } else { /* File is not regular file */
+ bb_error_msg_and_die("'%s' exists but is not regular file", dst_fn);
+ }
+ }
}
}
- /* 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++;
+ switch (i) {
+ case 'A':
+ overwrite = O_ALWAYS;
+ case 'y': /* Open file and fall into unzip */
+ unzip_create_leading_dirs(dst_fn);
+#if ENABLE_DESKTOP
+ dst_fd = xopen3(dst_fn, O_WRONLY | O_CREAT | O_TRUNC, file_mode);
+#else
+ dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
+#endif
+ case -1: /* Unzip */
+ if (!quiet) {
+ printf(" inflating: %s\n", dst_fn);
+ }
+ unzip_extract(&zip_header, dst_fd);
+ if (dst_fd != STDOUT_FILENO) {
+ /* closing STDOUT is potentially bad for future business */
+ close(dst_fd);
+ }
+ break;
- archive_handle->action_header(archive_handle->file_header);
+ case 'N':
+ overwrite = O_NEVER;
+ case 'n':
+ /* Skip entry data */
+ unzip_skip(zip_header.formatted.cmpsize);
+ break;
- /* 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;
+ case 'r':
+ /* Prompt for new name */
+ printf("new name: ");
+ my_fgets80(key_buf);
+ free(dst_fn);
+ dst_fn = xstrdup(key_buf);
+ chomp(dst_fn);
+ goto check_file;
+
+ default:
+ printf("error: invalid response [%c]\n", (char)i);
+ goto check_file;
}
+
+ total_entries++;
}
- /* Central directory section */
- if (archive_handle->action_header == header_verbose_list_unzip) {
- printf(" -------- -------\n");
- printf("%9d %d files\n", total_size, total_entries);
+ if (listing && quiet <= 1) {
+ if (!verbose) {
+ // " Length Date Time Name\n"
+ // " -------- ---- ---- ----"
+ printf( " -------- -------\n"
+ "%9lu" " %u files\n",
+ total_usize, total_entries);
+ } else {
+ unsigned long percents = total_usize - total_size;
+ percents = percents * 100;
+ if (total_usize)
+ percents /= total_usize;
+ // " Length Method Size Ratio Date Time CRC-32 Name\n"
+ // "-------- ------ ------- ----- ---- ---- ------ ----"
+ printf( "-------- ------- --- -------\n"
+ "%8lu" "%17lu%4u%% %u files\n",
+ total_usize, total_size, (unsigned)percents,
+ total_entries);
+ }
}
- return(EXIT_SUCCESS);
+ return 0;
}
projects / platform / upstream / busybox.git / blobdiff