source: MondoRescue/branches/stable/mindi-busybox/archival/unzip.c @ 1770

Last change on this file since 1770 was 1770, checked in by Bruno Cornec, 12 years ago
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

File size: 10.2 KB
Line 
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 "libbb.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
35typedef 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
51static 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
60static 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
70static 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
96int unzip_main(int argc, char **argv);
97int unzip_main(int argc, char **argv)
98{
99    zip_header_t zip_header;
100    enum {v_silent, v_normal, v_list} verbosity = v_normal;
101    enum {o_prompt, o_never, o_always} overwrite = o_prompt;
102    unsigned int total_size = 0;
103    unsigned int total_entries = 0;
104    int src_fd = -1, dst_fd = -1;
105    char *src_fn = NULL, *dst_fn = NULL;
106    llist_t *zaccept = NULL;
107    llist_t *zreject = NULL;
108    char *base_dir = NULL;
109    int failed, i, opt, opt_range = 0, list_header_done = 0;
110    char key_buf[512];
111    struct stat stat_buf;
112
113    while ((opt = getopt(argc, argv, "-d:lnopqx")) != -1) {
114        switch (opt_range) {
115        case 0: /* Options */
116            switch (opt) {
117            case 'l': /* List */
118                verbosity = v_list;
119                break;
120
121            case 'n': /* Never overwrite existing files */
122                overwrite = o_never;
123                break;
124
125            case 'o': /* Always overwrite existing files */
126                overwrite = o_always;
127                break;
128
129            case 'p': /* Extract files to stdout and fall through to set verbosity */
130                dst_fd = STDOUT_FILENO;
131
132            case 'q': /* Be quiet */
133                verbosity = (verbosity == v_normal) ? v_silent : verbosity;
134                break;
135
136            case 1 : /* The zip file */
137                src_fn = xmalloc(strlen(optarg)+4);
138                strcpy(src_fn, optarg);
139                opt_range++;
140                break;
141
142            default:
143                bb_show_usage();
144
145            }
146            break;
147
148        case 1: /* Include files */
149            if (opt == 1) {
150                llist_add_to(&zaccept, optarg);
151
152            } else if (opt == 'd') {
153                base_dir = optarg;
154                opt_range += 2;
155
156            } else if (opt == 'x') {
157                opt_range++;
158
159            } else {
160                bb_show_usage();
161            }
162            break;
163
164        case 2 : /* Exclude files */
165            if (opt == 1) {
166                llist_add_to(&zreject, optarg);
167
168            } else if (opt == 'd') { /* Extract to base directory */
169                base_dir = optarg;
170                opt_range++;
171
172            } else {
173                bb_show_usage();
174            }
175            break;
176
177        default:
178            bb_show_usage();
179        }
180    }
181
182    if (src_fn == NULL) {
183        bb_show_usage();
184    }
185
186    /* Open input file */
187    if (LONE_DASH(src_fn)) {
188        src_fd = STDIN_FILENO;
189        /* Cannot use prompt mode since zip data is arriving on STDIN */
190        overwrite = (overwrite == o_prompt) ? o_never : overwrite;
191    } else {
192        static const char *const extn[] = {"", ".zip", ".ZIP"};
193        int orig_src_fn_len = strlen(src_fn);
194        for (i = 0; (i < 3) && (src_fd == -1); i++) {
195            strcpy(src_fn + orig_src_fn_len, extn[i]);
196            src_fd = open(src_fn, O_RDONLY);
197        }
198        if (src_fd == -1) {
199            src_fn[orig_src_fn_len] = '\0';
200            bb_error_msg_and_die("cannot open %s, %s.zip, %s.ZIP", src_fn, src_fn, src_fn);
201        }
202    }
203
204    /* Change dir if necessary */
205    if (base_dir)
206        xchdir(base_dir);
207
208    if (verbosity != v_silent)
209        printf("Archive:  %s\n", src_fn);
210
211    failed = 0;
212
213    while (1) {
214        unsigned int magic;
215
216        /* Check magic number */
217        xread(src_fd, &magic, 4);
218        if (magic == ZIP_CDS_MAGIC) {
219            break;
220        } else if (magic != ZIP_FILEHEADER_MAGIC) {
221            bb_error_msg_and_die("invalid zip magic %08X", magic);
222        }
223
224        /* Read the file header */
225        xread(src_fd, zip_header.raw, 26);
226        zip_header.formatted.version = SWAP_LE32(zip_header.formatted.version);
227        zip_header.formatted.flags = SWAP_LE32(zip_header.formatted.flags);
228        zip_header.formatted.method = SWAP_LE32(zip_header.formatted.method);
229        zip_header.formatted.modtime = SWAP_LE32(zip_header.formatted.modtime);
230        zip_header.formatted.moddate = SWAP_LE32(zip_header.formatted.moddate);
231        zip_header.formatted.crc32 = SWAP_LE32(zip_header.formatted.crc32);
232        zip_header.formatted.cmpsize = SWAP_LE32(zip_header.formatted.cmpsize);
233        zip_header.formatted.ucmpsize = SWAP_LE32(zip_header.formatted.ucmpsize);
234        zip_header.formatted.filename_len = SWAP_LE32(zip_header.formatted.filename_len);
235        zip_header.formatted.extra_len = SWAP_LE32(zip_header.formatted.extra_len);
236        if ((zip_header.formatted.method != 0) && (zip_header.formatted.method != 8)) {
237            bb_error_msg_and_die("unsupported compression method %d", zip_header.formatted.method);
238        }
239
240        /* Read filename */
241        free(dst_fn);
242        dst_fn = xzalloc(zip_header.formatted.filename_len + 1);
243        xread(src_fd, dst_fn, zip_header.formatted.filename_len);
244
245        /* Skip extra header bytes */
246        unzip_skip(src_fd, zip_header.formatted.extra_len);
247
248        if ((verbosity == v_list) && !list_header_done){
249            puts("  Length     Date   Time    Name\n"
250                 " --------    ----   ----    ----");
251            list_header_done = 1;
252        }
253
254        /* Filter zip entries */
255        if (find_list_entry(zreject, dst_fn) ||
256            (zaccept && !find_list_entry(zaccept, dst_fn))) { /* Skip entry */
257            i = 'n';
258
259        } else { /* Extract entry */
260            total_size += zip_header.formatted.ucmpsize;
261
262            if (verbosity == v_list) { /* List entry */
263                unsigned int dostime = zip_header.formatted.modtime | (zip_header.formatted.moddate << 16);
264                printf("%9u  %02u-%02u-%02u %02u:%02u   %s\n",
265                       zip_header.formatted.ucmpsize,
266                       (dostime & 0x01e00000) >> 21,
267                       (dostime & 0x001f0000) >> 16,
268                       (((dostime & 0xfe000000) >> 25) + 1980) % 100,
269                       (dostime & 0x0000f800) >> 11,
270                       (dostime & 0x000007e0) >> 5,
271                       dst_fn);
272                total_entries++;
273                i = 'n';
274            } else if (dst_fd == STDOUT_FILENO) { /* Extracting to STDOUT */
275                i = -1;
276            } else if (last_char_is(dst_fn, '/')) { /* Extract directory */
277                if (stat(dst_fn, &stat_buf) == -1) {
278                    if (errno != ENOENT) {
279                        bb_perror_msg_and_die("cannot stat '%s'",dst_fn);
280                    }
281                    if (verbosity == v_normal) {
282                        printf("   creating: %s\n", dst_fn);
283                    }
284                    unzip_create_leading_dirs(dst_fn);
285                    if (bb_make_directory(dst_fn, 0777, 0)) {
286                        bb_error_msg_and_die("exiting");
287                    }
288                } else {
289                    if (!S_ISDIR(stat_buf.st_mode)) {
290                        bb_error_msg_and_die("'%s' exists but is not directory", dst_fn);
291                    }
292                }
293                i = 'n';
294
295            } else {  /* Extract file */
296 _check_file:
297                if (stat(dst_fn, &stat_buf) == -1) { /* File does not exist */
298                    if (errno != ENOENT) {
299                        bb_perror_msg_and_die("cannot stat '%s'",dst_fn);
300                    }
301                    i = 'y';
302                } else { /* File already exists */
303                    if (overwrite == o_never) {
304                        i = 'n';
305                    } else if (S_ISREG(stat_buf.st_mode)) { /* File is regular file */
306                        if (overwrite == o_always) {
307                            i = 'y';
308                        } else {
309                            printf("replace %s? [y]es, [n]o, [A]ll, [N]one, [r]ename: ", dst_fn);
310                            if (!fgets(key_buf, 512, stdin)) {
311                                bb_perror_msg_and_die("cannot read input");
312                            }
313                            i = key_buf[0];
314                        }
315                    } else { /* File is not regular file */
316                        bb_error_msg_and_die("'%s' exists but is not regular file",dst_fn);
317                    }
318                }
319            }
320        }
321
322        switch (i) {
323        case 'A':
324            overwrite = o_always;
325        case 'y': /* Open file and fall into unzip */
326            unzip_create_leading_dirs(dst_fn);
327            dst_fd = xopen(dst_fn, O_WRONLY | O_CREAT | O_TRUNC);
328        case -1: /* Unzip */
329            if (verbosity == v_normal) {
330                printf("  inflating: %s\n", dst_fn);
331            }
332            if (unzip_extract(&zip_header, src_fd, dst_fd)) {
333                failed = 1;
334            }
335            if (dst_fd != STDOUT_FILENO) {
336                /* closing STDOUT is potentially bad for future business */
337                close(dst_fd);
338            }
339            break;
340
341        case 'N':
342            overwrite = o_never;
343        case 'n':
344            /* Skip entry data */
345            unzip_skip(src_fd, zip_header.formatted.cmpsize);
346            break;
347
348        case 'r':
349            /* Prompt for new name */
350            printf("new name: ");
351            if (!fgets(key_buf, 512, stdin)) {
352                bb_perror_msg_and_die("cannot read input");
353            }
354            free(dst_fn);
355            dst_fn = xstrdup(key_buf);
356            chomp(dst_fn);
357            goto _check_file;
358
359        default:
360            printf("error: invalid response [%c]\n",(char)i);
361            goto _check_file;
362        }
363
364        /* Data descriptor section */
365        if (zip_header.formatted.flags & 4) {
366            /* skip over duplicate crc, compressed size and uncompressed size */
367            unzip_skip(src_fd, 12);
368        }
369    }
370
371    if (verbosity == v_list) {
372        printf(" --------                   -------\n"
373               "%9d                   %d files\n", total_size, total_entries);
374    }
375
376    return failed;
377}
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