busybox/archival/unzip.c

/* vi: set sw=4 ts=4: */
/*
 * Mini unzip implementation for busybox
 *
 * Copyright (C) 2004 by Ed Clark
 *
 * 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.
 */

/* For reference see
 * http://www.pkware.com/company/standards/appnote/
 * http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
 */

/* TODO
 * Endian issues
 * Zip64 + other methods
 * Improve handling of zip format, ie.
 * - deferred CRC, comp. & uncomp. lengths (zip header flags bit 3)
 * - unix file permissions, etc.
 * - central directory
 */

#include "busybox.h"
#include "unarchive.h"

#define ZIP_FILEHEADER_MAGIC		SWAP_LE32(0x04034b50)
#define ZIP_CDS_MAGIC			SWAP_LE32(0x02014b50)
#define ZIP_CDS_END_MAGIC		SWAP_LE32(0x06054b50)
#define ZIP_DD_MAGIC			SWAP_LE32(0x08074b50)

typedef 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 */
	} formatted ATTRIBUTE_PACKED;
} zip_header_t;

static void unzip_skip(int fd, off_t skip)
{
	if (lseek(fd, skip, SEEK_CUR) == (off_t)-1) {
		if (errno != ESPIPE)
			bb_error_msg_and_die("seek failure");
		bb_copyfd_exact_size(fd, -1, skip);
	}
}

static void unzip_create_leading_dirs(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 */
	}
	free(name);
}

static int unzip_extract(zip_header_t *zip_header, int src_fd, 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(src_fd, dst_fd, size);
	} else {
		/* Method 8 - inflate */
		inflate_unzip_result res;
		/* err = */ inflate_unzip(&res, zip_header->formatted.cmpsize, src_fd, dst_fd);
// we should check for -1 error return
		/* Validate decompression - crc */
		if (zip_header->formatted.crc32 != (res.crc ^ 0xffffffffL)) {
			bb_error_msg("invalid compressed data--%s error", "crc");
			return 1;
		}
		/* Validate decompression - size */
		if (zip_header->formatted.ucmpsize != res.bytes_out) {
			bb_error_msg("invalid compressed data--%s error", "length");
			return 1;
		}
	}
	return 0;
}

int unzip_main(int argc, char **argv)
{
	zip_header_t zip_header;
	enum {v_silent, v_normal, v_list} verbosity = v_normal;
	enum {o_prompt, o_never, o_always} overwrite = o_prompt;
	unsigned int total_size = 0;
	unsigned int total_entries = 0;
	int src_fd = -1, dst_fd = -1;
	char *src_fn = NULL, *dst_fn = NULL;
	llist_t *zaccept = NULL;
	llist_t *zreject = NULL;
	char *base_dir = NULL;
	int failed, i, opt, opt_range = 0, list_header_done = 0;
	char key_buf[512];
	struct stat stat_buf;

	while ((opt = getopt(argc, argv, "-d:lnopqx")) != -1) {
		switch (opt_range) {
		case 0: /* Options */
			switch (opt) {
			case 'l': /* List */
				verbosity = v_list;
				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 */
				verbosity = (verbosity == v_normal) ? v_silent : verbosity;
				break;

			case 1 : /* The zip file */
				src_fn = xstrndup(optarg, strlen(optarg)+4);
				opt_range++;
				break;

			default:
				bb_show_usage();

			}
			break;

		case 1: /* Include files */
			if (opt == 1) {
				llist_add_to(&zaccept, optarg);

			} else if (opt == 'd') {
				base_dir = optarg;
				opt_range += 2;

			} else if (opt == 'x') {
				opt_range++;

			} else {
				bb_show_usage();
			}
			break;

		case 2 : /* Exclude files */
			if (opt == 1) {
				llist_add_to(&zreject, optarg);

			} else if (opt == 'd') { /* Extract to base directory */
				base_dir = optarg;
				opt_range++;

			} else {
				bb_show_usage();
			}
			break;

		default:
			bb_show_usage();
		}
	}

	if (src_fn == NULL) {
		bb_show_usage();
	}

	/* Open input file */
	if (LONE_DASH(src_fn)) {
		src_fd = STDIN_FILENO;
		/* Cannot use prompt mode since zip data is arriving on STDIN */
		overwrite = (overwrite == o_prompt) ? o_never : overwrite;
	} else {
		static const char *const extn[] = {"", ".zip", ".ZIP"};
		int orig_src_fn_len = strlen(src_fn);
		for (i = 0; (i < 3) && (src_fd == -1); i++) {
			strcpy(src_fn + orig_src_fn_len, extn[i]);
			src_fd = open(src_fn, O_RDONLY);
		}
		if (src_fd == -1) {
			src_fn[orig_src_fn_len] = 0;
			bb_error_msg_and_die("cannot open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
		}
	}

	/* Change dir if necessary */
	if (base_dir)
		xchdir(base_dir);

	if (verbosity != v_silent)
		printf("Archive:  %s\n", src_fn);

	failed = 0;

	while (1) {
		unsigned int magic;

		/* Check magic number */
		xread(src_fd, &magic, 4);
		if (magic == ZIP_CDS_MAGIC) {
			break;
		} else if (magic != ZIP_FILEHEADER_MAGIC) {
			bb_error_msg_and_die("invalid zip magic %08X", magic);
		}

		/* Read the file header */
		xread(src_fd, zip_header.raw, 26);
		zip_header.formatted.version = SWAP_LE32(zip_header.formatted.version);
		zip_header.formatted.flags = SWAP_LE32(zip_header.formatted.flags);
		zip_header.formatted.method = SWAP_LE32(zip_header.formatted.method);
		zip_header.formatted.modtime = SWAP_LE32(zip_header.formatted.modtime);
		zip_header.formatted.moddate = SWAP_LE32(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_LE32(zip_header.formatted.filename_len);
		zip_header.formatted.extra_len = SWAP_LE32(zip_header.formatted.extra_len);
		if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
			bb_error_msg_and_die("unsupported compression method %d", zip_header.formatted.method);
		}

		/* Read filename */
		free(dst_fn);
		dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
		xread(src_fd, dst_fn, zip_header.formatted.filename_len);

		/* Skip extra header bytes */
		unzip_skip(src_fd, zip_header.formatted.extra_len);

		if ((verbosity == v_list) && !list_header_done){
			puts("  Length     Date   Time    Name\n"
			     " --------    ----   ----    ----");
			list_header_done = 1;
		}

		/* Filter zip entries */
		if (find_list_entry(zreject, dst_fn) ||
			(zaccept && !find_list_entry(zaccept, dst_fn))) { /* Skip entry */
			i = 'n';

		} else { /* Extract entry */
			total_size += zip_header.formatted.ucmpsize;

			if (verbosity == v_list) { /* List entry */
				unsigned int dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
				printf("%9u  %02u-%02u-%02u %02u:%02u   %s\n",
					   zip_header.formatted.ucmpsize,
					   (dostime & 0x01e00000) >> 21,
					   (dostime & 0x001f0000) >> 16,
					   (((dostime & 0xfe000000) >> 25) + 1980) % 100,
					   (dostime & 0x0000f800) >> 11,
					   (dostime & 0x000007e0) >> 5,
					   dst_fn);
				total_entries++;
				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("cannot stat '%s'",dst_fn);
					}
					if (verbosity == v_normal) {
						printf("   creating: %s\n", dst_fn);
					}
					unzip_create_leading_dirs(dst_fn);
					if (bb_make_directory(dst_fn, 0777, 0)) {
						bb_error_msg_and_die("exiting");
					}
				} 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("cannot 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);
							if (!fgets(key_buf, 512, stdin)) {
								bb_perror_msg_and_die("cannot read input");
							}
							i = key_buf[0];
						}
					} else { /* File is not regular file */
						bb_error_msg_and_die("'%s' exists but is not regular file",dst_fn);
					}
				}
			}
		}

		switch (i) {
		case 'A':
			overwrite = o_always;
		case 'y': /* Open file and fall into unzip */
			unzip_create_leading_dirs(dst_fn);
			dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
		case -1: /* Unzip */
			if (verbosity == v_normal) {
				printf("  inflating: %s\n", dst_fn);
			}
			if (unzip_extract(&zip_header, src_fd, dst_fd)) {
				failed = 1;
			}
			if (dst_fd != STDOUT_FILENO) {
				/* closing STDOUT is potentially bad for future business */
				close(dst_fd);
			}
			break;

		case 'N':
			overwrite = o_never;
		case 'n':
			/* Skip entry data */
			unzip_skip(src_fd, zip_header.formatted.cmpsize);
			break;

		case 'r':
			/* Prompt for new name */
			printf("new name: ");
			if (!fgets(key_buf, 512, stdin)) {
				bb_perror_msg_and_die("cannot read input");
			}
			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;
		}

		/* Data descriptor section */
		if (zip_header.formatted.flags & 4) {
			/* skip over duplicate crc, compressed size and uncompressed size */
			unzip_skip(src_fd, 12);
		}
	}

	if (verbosity == v_list) {
		printf(" --------                   -------\n"
		       "%9d                   %d files\n", total_size, total_entries);
	}

	return failed;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Mini unzip implementation for busybox
4	*
5	* Copyright (C) 2004 by Ed Clark
6	*
7	* Loosely based on original busybox unzip applet by Laurence Anderson.
8	* All options and features should work in this version.
9	*
10	* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
11	*/
12
13	/* For reference see
14	* http://www.pkware.com/company/standards/appnote/
15	* http://www.info-zip.org/pub/infozip/doc/appnote-iz-latest.zip
16	*/
17
18	/* TODO
19	* Endian issues
20	* Zip64 + other methods
21	* Improve handling of zip format, ie.
22	* - deferred CRC, comp. & uncomp. lengths (zip header flags bit 3)
23	* - unix file permissions, etc.
24	* - central directory
25	*/
26
27	#include "busybox.h"
28	#include "unarchive.h"
29
30	#define ZIP_FILEHEADER_MAGIC SWAP_LE32(0x04034b50)
31	#define ZIP_CDS_MAGIC SWAP_LE32(0x02014b50)
32	#define ZIP_CDS_END_MAGIC SWAP_LE32(0x06054b50)
33	#define ZIP_DD_MAGIC SWAP_LE32(0x08074b50)
34
35	typedef union {
36	unsigned char raw[26];
37	struct {
38	unsigned short version; /* 0-1 */
39	unsigned short flags; /* 2-3 */
40	unsigned short method; /* 4-5 */
41	unsigned short modtime; /* 6-7 */
42	unsigned short moddate; /* 8-9 */
43	unsigned int crc32 ATTRIBUTE_PACKED; /* 10-13 */
44	unsigned int cmpsize ATTRIBUTE_PACKED; /* 14-17 */
45	unsigned int ucmpsize ATTRIBUTE_PACKED; /* 18-21 */
46	unsigned short filename_len; /* 22-23 */
47	unsigned short extra_len; /* 24-25 */
48	} formatted ATTRIBUTE_PACKED;
49	} zip_header_t;
50
51	static void unzip_skip(int fd, off_t skip)
52	{
53	if (lseek(fd, skip, SEEK_CUR) == (off_t)-1) {
54	if (errno != ESPIPE)
55	bb_error_msg_and_die("seek failure");
56	bb_copyfd_exact_size(fd, -1, skip);
57	}
58	}
59
60	static void unzip_create_leading_dirs(char *fn)
61	{
62	/* Create all leading directories */
63	char *name = xstrdup(fn);
64	if (bb_make_directory(dirname(name), 0777, FILEUTILS_RECUR)) {
65	bb_error_msg_and_die("exiting"); /* bb_make_directory is noisy */
66	}
67	free(name);
68	}
69
70	static int unzip_extract(zip_header_t *zip_header, int src_fd, int dst_fd)
71	{
72	if (zip_header->formatted.method == 0) {
73	/* Method 0 - stored (not compressed) */
74	off_t size = zip_header->formatted.ucmpsize;
75	if (size)
76	bb_copyfd_exact_size(src_fd, dst_fd, size);
77	} else {
78	/* Method 8 - inflate */
79	inflate_unzip_result res;
80	/* err = */ inflate_unzip(&res, zip_header->formatted.cmpsize, src_fd, dst_fd);
81	// we should check for -1 error return
82	/* Validate decompression - crc */
83	if (zip_header->formatted.crc32 != (res.crc ^ 0xffffffffL)) {
84	bb_error_msg("invalid compressed data--%s error", "crc");
85	return 1;
86	}
87	/* Validate decompression - size */
88	if (zip_header->formatted.ucmpsize != res.bytes_out) {
89	bb_error_msg("invalid compressed data--%s error", "length");
90	return 1;
91	}
92	}
93	return 0;
94	}
95
96	int unzip_main(int argc, char **argv)
97	{
98	zip_header_t zip_header;
99	enum {v_silent, v_normal, v_list} verbosity = v_normal;
100	enum {o_prompt, o_never, o_always} overwrite = o_prompt;
101	unsigned int total_size = 0;
102	unsigned int total_entries = 0;
103	int src_fd = -1, dst_fd = -1;
104	char src_fn = NULL, dst_fn = NULL;
105	llist_t *zaccept = NULL;
106	llist_t *zreject = NULL;
107	char *base_dir = NULL;
108	int failed, i, opt, opt_range = 0, list_header_done = 0;
109	char key_buf[512];
110	struct stat stat_buf;
111
112	while ((opt = getopt(argc, argv, "-d:lnopqx")) != -1) {
113	switch (opt_range) {
114	case 0: /* Options */
115	switch (opt) {
116	case 'l': /* List */
117	verbosity = v_list;
118	break;
119
120	case 'n': /* Never overwrite existing files */
121	overwrite = o_never;
122	break;
123
124	case 'o': /* Always overwrite existing files */
125	overwrite = o_always;
126	break;
127
128	case 'p': /* Extract files to stdout and fall through to set verbosity */
129	dst_fd = STDOUT_FILENO;
130
131	case 'q': /* Be quiet */
132	verbosity = (verbosity == v_normal) ? v_silent : verbosity;
133	break;
134
135	case 1 : /* The zip file */
136	src_fn = xstrndup(optarg, strlen(optarg)+4);
137	opt_range++;
138	break;
139
140	default:
141	bb_show_usage();
142
143	}
144	break;
145
146	case 1: /* Include files */
147	if (opt == 1) {
148	llist_add_to(&zaccept, optarg);
149
150	} else if (opt == 'd') {
151	base_dir = optarg;
152	opt_range += 2;
153
154	} else if (opt == 'x') {
155	opt_range++;
156
157	} else {
158	bb_show_usage();
159	}
160	break;
161
162	case 2 : /* Exclude files */
163	if (opt == 1) {
164	llist_add_to(&zreject, optarg);
165
166	} else if (opt == 'd') { /* Extract to base directory */
167	base_dir = optarg;
168	opt_range++;
169
170	} else {
171	bb_show_usage();
172	}
173	break;
174
175	default:
176	bb_show_usage();
177	}
178	}
179
180	if (src_fn == NULL) {
181	bb_show_usage();
182	}
183
184	/* Open input file */
185	if (LONE_DASH(src_fn)) {
186	src_fd = STDIN_FILENO;
187	/* Cannot use prompt mode since zip data is arriving on STDIN */
188	overwrite = (overwrite == o_prompt) ? o_never : overwrite;
189	} else {
190	static const char *const extn[] = {"", ".zip", ".ZIP"};
191	int orig_src_fn_len = strlen(src_fn);
192	for (i = 0; (i < 3) && (src_fd == -1); i++) {
193	strcpy(src_fn + orig_src_fn_len, extn[i]);
194	src_fd = open(src_fn, O_RDONLY);
195	}
196	if (src_fd == -1) {
197	src_fn[orig_src_fn_len] = 0;
198	bb_error_msg_and_die("cannot open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
199	}
200	}
201
202	/* Change dir if necessary */
203	if (base_dir)
204	xchdir(base_dir);
205
206	if (verbosity != v_silent)
207	printf("Archive: %s\n", src_fn);
208
209	failed = 0;
210
211	while (1) {
212	unsigned int magic;
213
214	/* Check magic number */
215	xread(src_fd, &magic, 4);
216	if (magic == ZIP_CDS_MAGIC) {
217	break;
218	} else if (magic != ZIP_FILEHEADER_MAGIC) {
219	bb_error_msg_and_die("invalid zip magic %08X", magic);
220	}
221
222	/* Read the file header */
223	xread(src_fd, zip_header.raw, 26);
224	zip_header.formatted.version = SWAP_LE32(zip_header.formatted.version);
225	zip_header.formatted.flags = SWAP_LE32(zip_header.formatted.flags);
226	zip_header.formatted.method = SWAP_LE32(zip_header.formatted.method);
227	zip_header.formatted.modtime = SWAP_LE32(zip_header.formatted.modtime);
228	zip_header.formatted.moddate = SWAP_LE32(zip_header.formatted.moddate);
229	zip_header.formatted.crc32 = SWAP_LE32(zip_header.formatted.crc32);
230	zip_header.formatted.cmpsize = SWAP_LE32(zip_header.formatted.cmpsize);
231	zip_header.formatted.ucmpsize = SWAP_LE32(zip_header.formatted.ucmpsize);
232	zip_header.formatted.filename_len = SWAP_LE32(zip_header.formatted.filename_len);
233	zip_header.formatted.extra_len = SWAP_LE32(zip_header.formatted.extra_len);
234	if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
235	bb_error_msg_and_die("unsupported compression method %d", zip_header.formatted.method);
236	}
237
238	/* Read filename */
239	free(dst_fn);
240	dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
241	xread(src_fd, dst_fn, zip_header.formatted.filename_len);
242
243	/* Skip extra header bytes */
244	unzip_skip(src_fd, zip_header.formatted.extra_len);
245
246	if ((verbosity == v_list) && !list_header_done){
247	puts(" Length Date Time Name\n"
248	" -------- ---- ---- ----");
249	list_header_done = 1;
250	}
251
252	/* Filter zip entries */
253	if (find_list_entry(zreject, dst_fn) \|\|
254	(zaccept && !find_list_entry(zaccept, dst_fn))) { /* Skip entry */
255	i = 'n';
256
257	} else { /* Extract entry */
258	total_size += zip_header.formatted.ucmpsize;
259
260	if (verbosity == v_list) { /* List entry */
261	unsigned int dostime = zip_header.formatted.modtime \| (zip_header.formatted.moddate << 16);
262	printf("%9u %02u-%02u-%02u %02u:%02u %s\n",
263	zip_header.formatted.ucmpsize,
264	(dostime & 0x01e00000) >> 21,
265	(dostime & 0x001f0000) >> 16,
266	(((dostime & 0xfe000000) >> 25) + 1980) % 100,
267	(dostime & 0x0000f800) >> 11,
268	(dostime & 0x000007e0) >> 5,
269	dst_fn);
270	total_entries++;
271	i = 'n';
272	} else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
273	i = -1;
274	} else if (last_char_is(dst_fn, '/')) { /* Extract directory */
275	if (stat(dst_fn, &stat_buf) == -1) {
276	if (errno != ENOENT) {
277	bb_perror_msg_and_die("cannot stat '%s'",dst_fn);
278	}
279	if (verbosity == v_normal) {
280	printf(" creating: %s\n", dst_fn);
281	}
282	unzip_create_leading_dirs(dst_fn);
283	if (bb_make_directory(dst_fn, 0777, 0)) {
284	bb_error_msg_and_die("exiting");
285	}
286	} else {
287	if (!S_ISDIR(stat_buf.st_mode)) {
288	bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
289	}
290	}
291	i = 'n';
292
293	} else { /* Extract file */
294	_check_file:
295	if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
296	if (errno != ENOENT) {
297	bb_perror_msg_and_die("cannot stat '%s'",dst_fn);
298	}
299	i = 'y';
300	} else { /* File already exists */
301	if (overwrite == o_never) {
302	i = 'n';
303	} else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
304	if (overwrite == o_always) {
305	i = 'y';
306	} else {
307	printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
308	if (!fgets(key_buf, 512, stdin)) {
309	bb_perror_msg_and_die("cannot read input");
310	}
311	i = key_buf[0];
312	}
313	} else { /* File is not regular file */
314	bb_error_msg_and_die("'%s' exists but is not regular file",dst_fn);
315	}
316	}
317	}
318	}
319
320	switch (i) {
321	case 'A':
322	overwrite = o_always;
323	case 'y': /* Open file and fall into unzip */
324	unzip_create_leading_dirs(dst_fn);
325	dst_fd = xopen(dst_fn, O_WRONLY \| O_CREAT \| O_TRUNC);
326	case -1: /* Unzip */
327	if (verbosity == v_normal) {
328	printf(" inflating: %s\n", dst_fn);
329	}
330	if (unzip_extract(&zip_header, src_fd, dst_fd)) {
331	failed = 1;
332	}
333	if (dst_fd != STDOUT_FILENO) {
334	/* closing STDOUT is potentially bad for future business */
335	close(dst_fd);
336	}
337	break;
338
339	case 'N':
340	overwrite = o_never;
341	case 'n':
342	/* Skip entry data */
343	unzip_skip(src_fd, zip_header.formatted.cmpsize);
344	break;
345
346	case 'r':
347	/* Prompt for new name */
348	printf("new name: ");
349	if (!fgets(key_buf, 512, stdin)) {
350	bb_perror_msg_and_die("cannot read input");
351	}
352	free(dst_fn);
353	dst_fn = xstrdup(key_buf);
354	chomp(dst_fn);
355	goto _check_file;
356
357	default:
358	printf("error: invalid response [%c]\n",(char)i);
359	goto _check_file;
360	}
361
362	/* Data descriptor section */
363	if (zip_header.formatted.flags & 4) {
364	/* skip over duplicate crc, compressed size and uncompressed size */
365	unzip_skip(src_fd, 12);
366	}
367	}
368
369	if (verbosity == v_list) {
370	printf(" -------- -------\n"
371	"%9d %d files\n", total_size, total_entries);
372	}
373
374	return failed;
375	}