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Commit | Line | Data |
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e4fbbfe9 RS |
1 | /* |
2 | * Copyright (c) 2006 Rene Scharfe | |
3 | */ | |
4 | #include <time.h> | |
5 | #include "cache.h" | |
6 | #include "commit.h" | |
7 | #include "blob.h" | |
8 | #include "tree.h" | |
9 | #include "quote.h" | |
10 | #include "builtin.h" | |
ec06bff5 | 11 | #include "archive.h" |
e4fbbfe9 | 12 | |
e0ffb248 | 13 | static int verbose; |
e4fbbfe9 RS |
14 | static int zip_date; |
15 | static int zip_time; | |
16 | ||
17 | static unsigned char *zip_dir; | |
18 | static unsigned int zip_dir_size; | |
19 | ||
20 | static unsigned int zip_offset; | |
21 | static unsigned int zip_dir_offset; | |
22 | static unsigned int zip_dir_entries; | |
23 | ||
24 | #define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024) | |
25 | ||
26 | struct zip_local_header { | |
27 | unsigned char magic[4]; | |
28 | unsigned char version[2]; | |
29 | unsigned char flags[2]; | |
30 | unsigned char compression_method[2]; | |
31 | unsigned char mtime[2]; | |
32 | unsigned char mdate[2]; | |
33 | unsigned char crc32[4]; | |
34 | unsigned char compressed_size[4]; | |
35 | unsigned char size[4]; | |
36 | unsigned char filename_length[2]; | |
37 | unsigned char extra_length[2]; | |
38 | }; | |
39 | ||
40 | struct zip_dir_header { | |
41 | unsigned char magic[4]; | |
42 | unsigned char creator_version[2]; | |
43 | unsigned char version[2]; | |
44 | unsigned char flags[2]; | |
45 | unsigned char compression_method[2]; | |
46 | unsigned char mtime[2]; | |
47 | unsigned char mdate[2]; | |
48 | unsigned char crc32[4]; | |
49 | unsigned char compressed_size[4]; | |
50 | unsigned char size[4]; | |
51 | unsigned char filename_length[2]; | |
52 | unsigned char extra_length[2]; | |
53 | unsigned char comment_length[2]; | |
54 | unsigned char disk[2]; | |
55 | unsigned char attr1[2]; | |
56 | unsigned char attr2[4]; | |
57 | unsigned char offset[4]; | |
58 | }; | |
59 | ||
60 | struct zip_dir_trailer { | |
61 | unsigned char magic[4]; | |
62 | unsigned char disk[2]; | |
63 | unsigned char directory_start_disk[2]; | |
64 | unsigned char entries_on_this_disk[2]; | |
65 | unsigned char entries[2]; | |
66 | unsigned char size[4]; | |
67 | unsigned char offset[4]; | |
68 | unsigned char comment_length[2]; | |
69 | }; | |
70 | ||
71 | static void copy_le16(unsigned char *dest, unsigned int n) | |
72 | { | |
73 | dest[0] = 0xff & n; | |
74 | dest[1] = 0xff & (n >> 010); | |
75 | } | |
76 | ||
77 | static void copy_le32(unsigned char *dest, unsigned int n) | |
78 | { | |
79 | dest[0] = 0xff & n; | |
80 | dest[1] = 0xff & (n >> 010); | |
81 | dest[2] = 0xff & (n >> 020); | |
82 | dest[3] = 0xff & (n >> 030); | |
83 | } | |
84 | ||
85 | static void *zlib_deflate(void *data, unsigned long size, | |
86 | unsigned long *compressed_size) | |
87 | { | |
88 | z_stream stream; | |
89 | unsigned long maxsize; | |
90 | void *buffer; | |
91 | int result; | |
92 | ||
93 | memset(&stream, 0, sizeof(stream)); | |
94 | deflateInit(&stream, zlib_compression_level); | |
95 | maxsize = deflateBound(&stream, size); | |
96 | buffer = xmalloc(maxsize); | |
97 | ||
98 | stream.next_in = data; | |
99 | stream.avail_in = size; | |
100 | stream.next_out = buffer; | |
101 | stream.avail_out = maxsize; | |
102 | ||
103 | do { | |
104 | result = deflate(&stream, Z_FINISH); | |
105 | } while (result == Z_OK); | |
106 | ||
107 | if (result != Z_STREAM_END) { | |
108 | free(buffer); | |
109 | return NULL; | |
110 | } | |
111 | ||
112 | deflateEnd(&stream); | |
113 | *compressed_size = stream.total_out; | |
114 | ||
115 | return buffer; | |
116 | } | |
117 | ||
118 | static char *construct_path(const char *base, int baselen, | |
119 | const char *filename, int isdir, int *pathlen) | |
120 | { | |
121 | int filenamelen = strlen(filename); | |
122 | int len = baselen + filenamelen; | |
123 | char *path, *p; | |
124 | ||
125 | if (isdir) | |
126 | len++; | |
127 | p = path = xmalloc(len + 1); | |
128 | ||
129 | memcpy(p, base, baselen); | |
130 | p += baselen; | |
131 | memcpy(p, filename, filenamelen); | |
132 | p += filenamelen; | |
133 | if (isdir) | |
134 | *p++ = '/'; | |
135 | *p = '\0'; | |
136 | ||
137 | *pathlen = len; | |
138 | ||
139 | return path; | |
140 | } | |
141 | ||
142 | static int write_zip_entry(const unsigned char *sha1, | |
143 | const char *base, int baselen, | |
144 | const char *filename, unsigned mode, int stage) | |
145 | { | |
146 | struct zip_local_header header; | |
147 | struct zip_dir_header dirent; | |
62cdce17 | 148 | unsigned long attr2; |
e4fbbfe9 RS |
149 | unsigned long compressed_size; |
150 | unsigned long uncompressed_size; | |
151 | unsigned long crc; | |
152 | unsigned long direntsize; | |
153 | unsigned long size; | |
154 | int method; | |
155 | int result = -1; | |
156 | int pathlen; | |
157 | unsigned char *out; | |
158 | char *path; | |
159 | char type[20]; | |
160 | void *buffer = NULL; | |
161 | void *deflated = NULL; | |
162 | ||
163 | crc = crc32(0, Z_NULL, 0); | |
164 | ||
165 | path = construct_path(base, baselen, filename, S_ISDIR(mode), &pathlen); | |
e0ffb248 JH |
166 | if (verbose) |
167 | fprintf(stderr, "%s\n", path); | |
e4fbbfe9 RS |
168 | if (pathlen > 0xffff) { |
169 | error("path too long (%d chars, SHA1: %s): %s", pathlen, | |
170 | sha1_to_hex(sha1), path); | |
171 | goto out; | |
172 | } | |
173 | ||
174 | if (S_ISDIR(mode)) { | |
175 | method = 0; | |
62cdce17 | 176 | attr2 = 16; |
e4fbbfe9 RS |
177 | result = READ_TREE_RECURSIVE; |
178 | out = NULL; | |
179 | uncompressed_size = 0; | |
180 | compressed_size = 0; | |
62cdce17 RS |
181 | } else if (S_ISREG(mode) || S_ISLNK(mode)) { |
182 | method = 0; | |
183 | attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) : 0; | |
184 | if (S_ISREG(mode) && zlib_compression_level != 0) | |
185 | method = 8; | |
e4fbbfe9 RS |
186 | result = 0; |
187 | buffer = read_sha1_file(sha1, type, &size); | |
188 | if (!buffer) | |
189 | die("cannot read %s", sha1_to_hex(sha1)); | |
190 | crc = crc32(crc, buffer, size); | |
191 | out = buffer; | |
192 | uncompressed_size = size; | |
193 | compressed_size = size; | |
194 | } else { | |
195 | error("unsupported file mode: 0%o (SHA1: %s)", mode, | |
196 | sha1_to_hex(sha1)); | |
197 | goto out; | |
198 | } | |
199 | ||
200 | if (method == 8) { | |
201 | deflated = zlib_deflate(buffer, size, &compressed_size); | |
202 | if (deflated && compressed_size - 6 < size) { | |
203 | /* ZLIB --> raw compressed data (see RFC 1950) */ | |
204 | /* CMF and FLG ... */ | |
205 | out = (unsigned char *)deflated + 2; | |
206 | compressed_size -= 6; /* ... and ADLER32 */ | |
207 | } else { | |
208 | method = 0; | |
209 | compressed_size = size; | |
210 | } | |
211 | } | |
212 | ||
213 | /* make sure we have enough free space in the dictionary */ | |
214 | direntsize = sizeof(struct zip_dir_header) + pathlen; | |
215 | while (zip_dir_size < zip_dir_offset + direntsize) { | |
216 | zip_dir_size += ZIP_DIRECTORY_MIN_SIZE; | |
217 | zip_dir = xrealloc(zip_dir, zip_dir_size); | |
218 | } | |
219 | ||
220 | copy_le32(dirent.magic, 0x02014b50); | |
62cdce17 | 221 | copy_le16(dirent.creator_version, S_ISLNK(mode) ? 0x0317 : 0); |
cf72fb07 | 222 | copy_le16(dirent.version, 10); |
e4fbbfe9 RS |
223 | copy_le16(dirent.flags, 0); |
224 | copy_le16(dirent.compression_method, method); | |
225 | copy_le16(dirent.mtime, zip_time); | |
226 | copy_le16(dirent.mdate, zip_date); | |
227 | copy_le32(dirent.crc32, crc); | |
228 | copy_le32(dirent.compressed_size, compressed_size); | |
229 | copy_le32(dirent.size, uncompressed_size); | |
230 | copy_le16(dirent.filename_length, pathlen); | |
231 | copy_le16(dirent.extra_length, 0); | |
232 | copy_le16(dirent.comment_length, 0); | |
233 | copy_le16(dirent.disk, 0); | |
234 | copy_le16(dirent.attr1, 0); | |
62cdce17 | 235 | copy_le32(dirent.attr2, attr2); |
e4fbbfe9 RS |
236 | copy_le32(dirent.offset, zip_offset); |
237 | memcpy(zip_dir + zip_dir_offset, &dirent, sizeof(struct zip_dir_header)); | |
238 | zip_dir_offset += sizeof(struct zip_dir_header); | |
239 | memcpy(zip_dir + zip_dir_offset, path, pathlen); | |
240 | zip_dir_offset += pathlen; | |
241 | zip_dir_entries++; | |
242 | ||
243 | copy_le32(header.magic, 0x04034b50); | |
cf72fb07 | 244 | copy_le16(header.version, 10); |
e4fbbfe9 RS |
245 | copy_le16(header.flags, 0); |
246 | copy_le16(header.compression_method, method); | |
247 | copy_le16(header.mtime, zip_time); | |
248 | copy_le16(header.mdate, zip_date); | |
249 | copy_le32(header.crc32, crc); | |
250 | copy_le32(header.compressed_size, compressed_size); | |
251 | copy_le32(header.size, uncompressed_size); | |
252 | copy_le16(header.filename_length, pathlen); | |
253 | copy_le16(header.extra_length, 0); | |
254 | write_or_die(1, &header, sizeof(struct zip_local_header)); | |
255 | zip_offset += sizeof(struct zip_local_header); | |
256 | write_or_die(1, path, pathlen); | |
257 | zip_offset += pathlen; | |
258 | if (compressed_size > 0) { | |
259 | write_or_die(1, out, compressed_size); | |
260 | zip_offset += compressed_size; | |
261 | } | |
262 | ||
263 | out: | |
264 | free(buffer); | |
265 | free(deflated); | |
266 | free(path); | |
267 | ||
268 | return result; | |
269 | } | |
270 | ||
271 | static void write_zip_trailer(const unsigned char *sha1) | |
272 | { | |
273 | struct zip_dir_trailer trailer; | |
274 | ||
275 | copy_le32(trailer.magic, 0x06054b50); | |
276 | copy_le16(trailer.disk, 0); | |
277 | copy_le16(trailer.directory_start_disk, 0); | |
278 | copy_le16(trailer.entries_on_this_disk, zip_dir_entries); | |
279 | copy_le16(trailer.entries, zip_dir_entries); | |
280 | copy_le32(trailer.size, zip_dir_offset); | |
281 | copy_le32(trailer.offset, zip_offset); | |
282 | copy_le16(trailer.comment_length, sha1 ? 40 : 0); | |
283 | ||
284 | write_or_die(1, zip_dir, zip_dir_offset); | |
285 | write_or_die(1, &trailer, sizeof(struct zip_dir_trailer)); | |
286 | if (sha1) | |
287 | write_or_die(1, sha1_to_hex(sha1), 40); | |
288 | } | |
289 | ||
290 | static void dos_time(time_t *time, int *dos_date, int *dos_time) | |
291 | { | |
292 | struct tm *t = localtime(time); | |
293 | ||
294 | *dos_date = t->tm_mday + (t->tm_mon + 1) * 32 + | |
295 | (t->tm_year + 1900 - 1980) * 512; | |
296 | *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; | |
297 | } | |
298 | ||
ec06bff5 FBH |
299 | int write_zip_archive(struct archiver_args *args) |
300 | { | |
301 | int plen = strlen(args->base); | |
302 | ||
303 | dos_time(&args->time, &zip_date, &zip_time); | |
304 | ||
305 | zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE); | |
306 | zip_dir_size = ZIP_DIRECTORY_MIN_SIZE; | |
e0ffb248 | 307 | verbose = args->verbose; |
ec06bff5 FBH |
308 | |
309 | if (args->base && plen > 0 && args->base[plen - 1] == '/') { | |
326711c1 | 310 | char *base = xstrdup(args->base); |
ec06bff5 FBH |
311 | int baselen = strlen(base); |
312 | ||
313 | while (baselen > 0 && base[baselen - 1] == '/') | |
314 | base[--baselen] = '\0'; | |
315 | write_zip_entry(args->tree->object.sha1, "", 0, base, 040777, 0); | |
316 | free(base); | |
317 | } | |
318 | read_tree_recursive(args->tree, args->base, plen, 0, | |
319 | args->pathspec, write_zip_entry); | |
320 | write_zip_trailer(args->commit_sha1); | |
321 | ||
322 | free(zip_dir); | |
323 | ||
324 | return 0; | |
325 | } | |
854c4168 RS |
326 | |
327 | void *parse_extra_zip_args(int argc, const char **argv) | |
328 | { | |
329 | for (; argc > 0; argc--, argv++) { | |
330 | const char *arg = argv[0]; | |
331 | ||
332 | if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0') | |
333 | zlib_compression_level = arg[1] - '0'; | |
334 | else | |
335 | die("Unknown argument for zip format: %s", arg); | |
336 | } | |
337 | return NULL; | |
338 | } |