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	niro	532	/* 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			}