* Loosely based on original busybox unzip applet by Laurence Anderson.
* All options and features should work in this version.
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * 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
+ *
+ * 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 "unarchive.h"
+#include "bb_archive.h"
enum {
#if BB_BIG_ENDIAN
uint8_t raw[ZIP_HEADER_LEN];
struct {
uint16_t version; /* 0-1 */
- uint16_t flags; /* 2-3 */
+ uint16_t zip_flags; /* 2-3 */
uint16_t method; /* 4-5 */
uint16_t modtime; /* 6-7 */
uint16_t moddate; /* 8-9 */
#define FIX_ENDIANNESS_ZIP(zip_header) do { \
(zip_header).formatted.version = SWAP_LE16((zip_header).formatted.version ); \
- (zip_header).formatted.flags = SWAP_LE16((zip_header).formatted.flags ); \
(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 ); \
#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)
{
- unsigned char buf[1024];
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);
- if (end < 1024)
- end = 1024;
- end -= 1024;
+ end -= PEEK_FROM_END;
+ if (end < 0)
+ end = 0;
xlseek(zip_fd, end, SEEK_SET);
- full_read(zip_fd, buf, 1024);
+ full_read(zip_fd, buf, PEEK_FROM_END);
+ cde_header.formatted.cdf_offset = BAD_CDF_OFFSET;
p = buf;
- while (p <= buf + 1024 - CDE_HEADER_LEN - 4) {
+ while (p <= buf + PEEK_FROM_END - CDE_HEADER_LEN - 4) {
if (*p != 'P') {
p++;
continue;
/* we found CDE! */
memcpy(cde_header.raw, p + 1, CDE_HEADER_LEN);
FIX_ENDIANNESS_CDE(cde_header);
- return cde_header.formatted.cdf_offset;
+ /*
+ * 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;
}
- bb_error_msg_and_die("can't find file table");
+ free(buf);
+ return cde_header.formatted.cdf_offset;
};
static uint32_t read_next_cdf(uint32_t cdf_offset, cdf_header_t *cdf_ptr)
if (!cdf_offset)
cdf_offset = find_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;
+ 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;
+ }
xlseek(zip_fd, org, SEEK_SET);
return cdf_offset;
static void unzip_skip(off_t skip)
{
- if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
- bb_copyfd_exact_size(zip_fd, -1, skip);
+ if (skip != 0)
+ if (lseek(zip_fd, skip, SEEK_CUR) == (off_t)-1)
+ bb_copyfd_exact_size(zip_fd, -1, skip);
}
static void unzip_create_leading_dirs(const char *fn)
/* Create all leading directories */
char *name = xstrdup(fn);
if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
- bb_error_msg_and_die("exiting"); /* bb_make_directory is noisy */
+ xfunc_die(); /* bb_make_directory is noisy */
}
free(name);
}
bb_copyfd_exact_size(zip_fd, dst_fd, size);
} else {
/* Method 8 - inflate */
- inflate_unzip_result res;
- if (inflate_unzip(&res, zip_header->formatted.cmpsize, zip_fd, dst_fd) < 0)
+ 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 != (res.crc ^ 0xffffffffL)) {
+ if (zip_header->formatted.crc32 != (aux.crc32 ^ 0xffffffffL)) {
bb_error_msg_and_die("crc error");
}
/* Validate decompression - size */
- if (zip_header->formatted.ucmpsize != res.bytes_out) {
+ 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");
}
}
+static void my_fgets80(char *buf80)
+{
+ fflush_all();
+ if (!fgets(buf80, 80, stdin)) {
+ bb_perror_msg_and_die("can't read standard input");
+ }
+}
+
int unzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int unzip_main(int argc, char **argv)
{
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
llist_t *zreject = NULL;
char *base_dir = NULL;
int i, opt;
- int opt_range = 0;
- char key_buf[80];
+ char key_buf[80]; /* must match size used by my_fgets80 */
struct stat stat_buf;
/* -q, -l and -v: UnZip 5.52 of 28 February 2005, by Info-ZIP:
* 204372 1 file
*/
+ x_opt_seen = 0;
/* '-' makes getopt return 1 for non-options */
while ((opt = getopt(argc, argv, "-d:lnopqxv")) != -1) {
- switch (opt_range) {
- case 0: /* Options */
- switch (opt) {
- case 'l': /* List */
- listing = 1;
- break;
-
- case 'n': /* Never overwrite existing files */
- overwrite = O_NEVER;
- break;
+ switch (opt) {
+ case 'd': /* Extract to base directory */
+ base_dir = optarg;
+ break;
- case 'o': /* Always overwrite existing files */
- overwrite = O_ALWAYS;
- break;
+ case 'l': /* List */
+ listing = 1;
+ break;
- case 'p': /* Extract files to stdout and fall through to set verbosity */
- dst_fd = STDOUT_FILENO;
+ case 'n': /* Never overwrite existing files */
+ overwrite = O_NEVER;
+ break;
- case 'q': /* Be quiet */
- quiet++;
- break;
+ case 'o': /* Always overwrite existing files */
+ overwrite = O_ALWAYS;
+ break;
- case 'v': /* Verbose list */
- IF_DESKTOP(verbose++;)
- listing = 1;
- break;
+ case 'p': /* Extract files to stdout and fall through to set verbosity */
+ dst_fd = STDOUT_FILENO;
- case 1: /* The zip file */
- /* +5: space for ".zip" and NUL */
- src_fn = xmalloc(strlen(optarg) + 5);
- strcpy(src_fn, optarg);
- opt_range++;
- break;
+ case 'q': /* Be quiet */
+ quiet++;
+ break;
- default:
- bb_show_usage();
+ case 'v': /* Verbose list */
+ IF_DESKTOP(verbose++;)
+ listing = 1;
+ break;
- }
+ case 'x':
+ x_opt_seen = 1;
break;
- case 1: /* Include files */
- if (opt == 1) {
+ 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);
- break;
- }
- if (opt == 'd') {
- base_dir = optarg;
- opt_range += 2;
- break;
- }
- if (opt == 'x') {
- opt_range++;
- break;
- }
- bb_show_usage();
-
- case 2 : /* Exclude files */
- if (opt == 1) {
+ } else {
+ /* Exclude files */
llist_add_to(&zreject, optarg);
- break;
}
- if (opt == 'd') { /* Extract to base directory */
- base_dir = optarg;
- opt_range++;
- break;
- }
- /* fall through */
+ break;
default:
bb_show_usage();
}
}
- if (src_fn == NULL) {
+#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
+
+ if (!src_fn) {
bb_show_usage();
}
if (overwrite == O_PROMPT)
overwrite = O_NEVER;
} else {
- static const char extn[][5] = {"", ".zip", ".ZIP"};
- int orig_src_fn_len = strlen(src_fn);
- int src_fd = -1;
+ static const char extn[][5] = { ".zip", ".ZIP" };
+ char *ext = src_fn + strlen(src_fn);
+ int src_fd;
- for (i = 0; (i < 3) && (src_fd == -1); i++) {
- strcpy(src_fn + orig_src_fn_len, extn[i]);
+ i = 0;
+ for (;;) {
src_fd = open(src_fn, O_RDONLY);
- }
- if (src_fd == -1) {
- src_fn[orig_src_fn_len] = '\0';
- bb_error_msg_and_die("can't open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
+ 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);
}
bb_error_msg_and_die("unsupported method %d", zip_header.formatted.method);
}
#if !ENABLE_DESKTOP
- if (zip_header.formatted.flags & 0x0009) {
+ 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.flags & 0x0001) {
+ if (zip_header.formatted.zip_flags & SWAP_LE16(0x0001)) {
/* 0x0001 - encrypted */
bb_error_msg_and_die("zip flag 1 (encryption) is not supported");
}
- {
+ if (cdf_offset != BAD_CDF_OFFSET) {
cdf_header_t cdf_header;
cdf_offset = read_next_cdf(cdf_offset, &cdf_header);
- if (zip_header.formatted.flags & 0x0008) {
+ /*
+ * 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 */
+ * 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 */
+ /* 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
/* Read filename */
printf(" creating: %s\n", dst_fn);
}
unzip_create_leading_dirs(dst_fn);
- if (bb_make_directory(dst_fn, dir_mode, 0)) {
- bb_error_msg_and_die("exiting");
+ if (bb_make_directory(dst_fn, dir_mode, FILEUTILS_IGNORE_CHMOD_ERR)) {
+ xfunc_die();
}
} else {
if (!S_ISDIR(stat_buf.st_mode)) {
i = 'y';
} else {
printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
- if (!fgets(key_buf, sizeof(key_buf), stdin)) {
- bb_perror_msg_and_die("can't read input");
- }
+ my_fgets80(key_buf);
i = key_buf[0];
}
} else { /* File is not regular file */
case 'r':
/* Prompt for new name */
printf("new name: ");
- if (!fgets(key_buf, sizeof(key_buf), stdin)) {
- bb_perror_msg_and_die("can't read input");
- }
+ my_fgets80(key_buf);
free(dst_fn);
dst_fn = xstrdup(key_buf);
chomp(dst_fn);
projects / platform / upstream / busybox.git / blobdiff