Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2005, 2006 Rene Scharfe |
| 3 | */ |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 4 | #include "cache.h" |
Brandon Williams | b2141fc | 2017-06-14 11:07:36 -0700 | [diff] [blame] | 5 | #include "config.h" |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 6 | #include "tar.h" |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 7 | #include "archive.h" |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 8 | #include "streaming.h" |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 9 | #include "run-command.h" |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 10 | |
| 11 | #define RECORDSIZE (512) |
| 12 | #define BLOCKSIZE (RECORDSIZE * 20) |
| 13 | |
| 14 | static char block[BLOCKSIZE]; |
| 15 | static unsigned long offset; |
| 16 | |
René Scharfe | f08b3b0 | 2007-01-05 23:30:22 +0100 | [diff] [blame] | 17 | static int tar_umask = 002; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 18 | |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 19 | static int write_tar_filter_archive(const struct archiver *ar, |
| 20 | struct archiver_args *args); |
| 21 | |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 22 | /* |
| 23 | * This is the max value that a ustar size header can specify, as it is fixed |
| 24 | * at 11 octal digits. POSIX specifies that we switch to extended headers at |
| 25 | * this size. |
Jeff King | 6e8e099 | 2016-06-30 05:09:20 -0400 | [diff] [blame] | 26 | * |
| 27 | * Likewise for the mtime (which happens to use a buffer of the same size). |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 28 | */ |
Junio C Hamano | 2949358 | 2016-07-14 13:04:43 -0700 | [diff] [blame] | 29 | #if ULONG_MAX == 0xFFFFFFFF |
| 30 | #define USTAR_MAX_SIZE ULONG_MAX |
Junio C Hamano | 2949358 | 2016-07-14 13:04:43 -0700 | [diff] [blame] | 31 | #else |
Ramsay Jones | 3f78971 | 2017-05-08 21:34:58 +0100 | [diff] [blame] | 32 | #define USTAR_MAX_SIZE 077777777777UL |
Johannes Schindelin | dddbad7 | 2017-04-26 21:29:31 +0200 | [diff] [blame] | 33 | #endif |
| 34 | #if TIME_MAX == 0xFFFFFFFF |
| 35 | #define USTAR_MAX_MTIME TIME_MAX |
| 36 | #else |
Ramsay Jones | 3f78971 | 2017-05-08 21:34:58 +0100 | [diff] [blame] | 37 | #define USTAR_MAX_MTIME 077777777777ULL |
Junio C Hamano | 2949358 | 2016-07-14 13:04:43 -0700 | [diff] [blame] | 38 | #endif |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 39 | |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 40 | /* writes out the whole block, but only if it is full */ |
| 41 | static void write_if_needed(void) |
| 42 | { |
| 43 | if (offset == BLOCKSIZE) { |
| 44 | write_or_die(1, block, BLOCKSIZE); |
| 45 | offset = 0; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * queues up writes, so that all our write(2) calls write exactly one |
| 51 | * full block; pads writes to RECORDSIZE |
| 52 | */ |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 53 | static void do_write_blocked(const void *data, unsigned long size) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 54 | { |
| 55 | const char *buf = data; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 56 | |
| 57 | if (offset) { |
| 58 | unsigned long chunk = BLOCKSIZE - offset; |
| 59 | if (size < chunk) |
| 60 | chunk = size; |
| 61 | memcpy(block + offset, buf, chunk); |
| 62 | size -= chunk; |
| 63 | offset += chunk; |
| 64 | buf += chunk; |
| 65 | write_if_needed(); |
| 66 | } |
| 67 | while (size >= BLOCKSIZE) { |
| 68 | write_or_die(1, buf, BLOCKSIZE); |
| 69 | size -= BLOCKSIZE; |
| 70 | buf += BLOCKSIZE; |
| 71 | } |
| 72 | if (size) { |
| 73 | memcpy(block + offset, buf, size); |
| 74 | offset += size; |
| 75 | } |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | static void finish_record(void) |
| 79 | { |
| 80 | unsigned long tail; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 81 | tail = offset % RECORDSIZE; |
| 82 | if (tail) { |
| 83 | memset(block + offset, 0, RECORDSIZE - tail); |
| 84 | offset += RECORDSIZE - tail; |
| 85 | } |
| 86 | write_if_needed(); |
| 87 | } |
| 88 | |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 89 | static void write_blocked(const void *data, unsigned long size) |
| 90 | { |
| 91 | do_write_blocked(data, size); |
| 92 | finish_record(); |
| 93 | } |
| 94 | |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 95 | /* |
| 96 | * The end of tar archives is marked by 2*512 nul bytes and after that |
| 97 | * follows the rest of the block (if any). |
| 98 | */ |
| 99 | static void write_trailer(void) |
| 100 | { |
| 101 | int tail = BLOCKSIZE - offset; |
| 102 | memset(block + offset, 0, tail); |
| 103 | write_or_die(1, block, BLOCKSIZE); |
| 104 | if (tail < 2 * RECORDSIZE) { |
| 105 | memset(block, 0, offset); |
| 106 | write_or_die(1, block, BLOCKSIZE); |
| 107 | } |
| 108 | } |
| 109 | |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 110 | /* |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 111 | * queues up writes, so that all our write(2) calls write exactly one |
| 112 | * full block; pads writes to RECORDSIZE |
| 113 | */ |
| 114 | static int stream_blocked(const unsigned char *sha1) |
| 115 | { |
| 116 | struct git_istream *st; |
| 117 | enum object_type type; |
| 118 | unsigned long sz; |
| 119 | char buf[BLOCKSIZE]; |
| 120 | ssize_t readlen; |
| 121 | |
| 122 | st = open_istream(sha1, &type, &sz, NULL); |
| 123 | if (!st) |
| 124 | return error("cannot stream blob %s", sha1_to_hex(sha1)); |
| 125 | for (;;) { |
| 126 | readlen = read_istream(st, buf, sizeof(buf)); |
| 127 | if (readlen <= 0) |
| 128 | break; |
| 129 | do_write_blocked(buf, readlen); |
| 130 | } |
| 131 | close_istream(st); |
| 132 | if (!readlen) |
| 133 | finish_record(); |
| 134 | return readlen; |
| 135 | } |
| 136 | |
| 137 | /* |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 138 | * pax extended header records have the format "%u %s=%s\n". %u contains |
| 139 | * the size of the whole string (including the %u), the first %s is the |
| 140 | * keyword, the second one is the value. This function constructs such a |
| 141 | * string and appends it to a struct strbuf. |
| 142 | */ |
| 143 | static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, |
| 144 | const char *value, unsigned int valuelen) |
| 145 | { |
Pierre Habouzit | 7a604f1 | 2007-09-06 13:20:06 +0200 | [diff] [blame] | 146 | int len, tmp; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 147 | |
| 148 | /* "%u %s=%s\n" */ |
| 149 | len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1; |
| 150 | for (tmp = len; tmp > 9; tmp /= 10) |
| 151 | len++; |
| 152 | |
Pierre Habouzit | 7a604f1 | 2007-09-06 13:20:06 +0200 | [diff] [blame] | 153 | strbuf_grow(sb, len); |
| 154 | strbuf_addf(sb, "%u %s=", len, keyword); |
| 155 | strbuf_add(sb, value, valuelen); |
| 156 | strbuf_addch(sb, '\n'); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 157 | } |
| 158 | |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 159 | /* |
| 160 | * Like strbuf_append_ext_header, but for numeric values. |
| 161 | */ |
| 162 | static void strbuf_append_ext_header_uint(struct strbuf *sb, |
| 163 | const char *keyword, |
| 164 | uintmax_t value) |
| 165 | { |
| 166 | char buf[40]; /* big enough for 2^128 in decimal, plus NUL */ |
| 167 | int len; |
| 168 | |
| 169 | len = xsnprintf(buf, sizeof(buf), "%"PRIuMAX, value); |
| 170 | strbuf_append_ext_header(sb, keyword, buf, len); |
| 171 | } |
| 172 | |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 173 | static unsigned int ustar_header_chksum(const struct ustar_header *header) |
| 174 | { |
Junio C Hamano | a5a46eb | 2012-06-13 10:42:25 -0700 | [diff] [blame] | 175 | const unsigned char *p = (const unsigned char *)header; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 176 | unsigned int chksum = 0; |
Junio C Hamano | a5a46eb | 2012-06-13 10:42:25 -0700 | [diff] [blame] | 177 | while (p < (const unsigned char *)header->chksum) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 178 | chksum += *p++; |
| 179 | chksum += sizeof(header->chksum) * ' '; |
| 180 | p += sizeof(header->chksum); |
Junio C Hamano | a5a46eb | 2012-06-13 10:42:25 -0700 | [diff] [blame] | 181 | while (p < (const unsigned char *)header + sizeof(struct ustar_header)) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 182 | chksum += *p++; |
| 183 | return chksum; |
| 184 | } |
| 185 | |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 186 | static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 187 | { |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 188 | size_t i = pathlen; |
René Scharfe | 22f0dcd | 2013-01-05 23:49:54 +0100 | [diff] [blame] | 189 | if (i > 1 && path[i - 1] == '/') |
| 190 | i--; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 191 | if (i > maxlen) |
| 192 | i = maxlen; |
| 193 | do { |
| 194 | i--; |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 195 | } while (i > 0 && path[i] != '/'); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 196 | return i; |
| 197 | } |
| 198 | |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 199 | static void prepare_header(struct archiver_args *args, |
| 200 | struct ustar_header *header, |
| 201 | unsigned int mode, unsigned long size) |
| 202 | { |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 203 | xsnprintf(header->mode, sizeof(header->mode), "%07o", mode & 07777); |
| 204 | xsnprintf(header->size, sizeof(header->size), "%011lo", S_ISREG(mode) ? size : 0); |
| 205 | xsnprintf(header->mtime, sizeof(header->mtime), "%011lo", (unsigned long) args->time); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 206 | |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 207 | xsnprintf(header->uid, sizeof(header->uid), "%07o", 0); |
| 208 | xsnprintf(header->gid, sizeof(header->gid), "%07o", 0); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 209 | strlcpy(header->uname, "root", sizeof(header->uname)); |
| 210 | strlcpy(header->gname, "root", sizeof(header->gname)); |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 211 | xsnprintf(header->devmajor, sizeof(header->devmajor), "%07o", 0); |
| 212 | xsnprintf(header->devminor, sizeof(header->devminor), "%07o", 0); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 213 | |
| 214 | memcpy(header->magic, "ustar", 6); |
| 215 | memcpy(header->version, "00", 2); |
| 216 | |
Jeff King | 9e6c1e9 | 2016-05-26 00:28:08 -0400 | [diff] [blame] | 217 | xsnprintf(header->chksum, sizeof(header->chksum), "%07o", ustar_header_chksum(header)); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 218 | } |
| 219 | |
René Scharfe | 560b0e8 | 2016-08-06 16:35:38 +0200 | [diff] [blame] | 220 | static void write_extended_header(struct archiver_args *args, |
| 221 | const unsigned char *sha1, |
| 222 | const void *buffer, unsigned long size) |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 223 | { |
| 224 | struct ustar_header header; |
| 225 | unsigned int mode; |
| 226 | memset(&header, 0, sizeof(header)); |
| 227 | *header.typeflag = TYPEFLAG_EXT_HEADER; |
Junio C Hamano | 15c6ef7 | 2014-10-20 12:04:46 -0700 | [diff] [blame] | 228 | mode = 0100666; |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 229 | xsnprintf(header.name, sizeof(header.name), "%s.paxheader", sha1_to_hex(sha1)); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 230 | prepare_header(args, &header, mode, size); |
| 231 | write_blocked(&header, sizeof(header)); |
| 232 | write_blocked(buffer, size); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 233 | } |
| 234 | |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 235 | static int write_tar_entry(struct archiver_args *args, |
Nguyễn Thái Ngọc Duy | 9cb513b | 2012-05-03 08:51:03 +0700 | [diff] [blame] | 236 | const unsigned char *sha1, |
| 237 | const char *path, size_t pathlen, |
| 238 | unsigned int mode) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 239 | { |
| 240 | struct ustar_header header; |
Brandon Casey | f285a2d | 2008-10-09 14:12:12 -0500 | [diff] [blame] | 241 | struct strbuf ext_header = STRBUF_INIT; |
Nguyễn Thái Ngọc Duy | 9cb513b | 2012-05-03 08:51:03 +0700 | [diff] [blame] | 242 | unsigned int old_mode = mode; |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 243 | unsigned long size, size_in_header; |
Nguyễn Thái Ngọc Duy | 9cb513b | 2012-05-03 08:51:03 +0700 | [diff] [blame] | 244 | void *buffer; |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 245 | int err = 0; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 246 | |
| 247 | memset(&header, 0, sizeof(header)); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 248 | |
Nguyễn Thái Ngọc Duy | 8539070 | 2012-05-03 08:51:02 +0700 | [diff] [blame] | 249 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
| 250 | *header.typeflag = TYPEFLAG_DIR; |
| 251 | mode = (mode | 0777) & ~tar_umask; |
| 252 | } else if (S_ISLNK(mode)) { |
| 253 | *header.typeflag = TYPEFLAG_LNK; |
| 254 | mode |= 0777; |
| 255 | } else if (S_ISREG(mode)) { |
| 256 | *header.typeflag = TYPEFLAG_REG; |
| 257 | mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 258 | } else { |
Nguyễn Thái Ngọc Duy | 8539070 | 2012-05-03 08:51:02 +0700 | [diff] [blame] | 259 | return error("unsupported file mode: 0%o (SHA1: %s)", |
| 260 | mode, sha1_to_hex(sha1)); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 261 | } |
Nguyễn Thái Ngọc Duy | 8539070 | 2012-05-03 08:51:02 +0700 | [diff] [blame] | 262 | if (pathlen > sizeof(header.name)) { |
| 263 | size_t plen = get_path_prefix(path, pathlen, |
| 264 | sizeof(header.prefix)); |
| 265 | size_t rest = pathlen - plen - 1; |
| 266 | if (plen > 0 && rest <= sizeof(header.name)) { |
| 267 | memcpy(header.prefix, path, plen); |
Jeff King | 108332c | 2015-09-24 17:03:49 -0400 | [diff] [blame] | 268 | memcpy(header.name, path + plen + 1, rest); |
Nguyễn Thái Ngọc Duy | 8539070 | 2012-05-03 08:51:02 +0700 | [diff] [blame] | 269 | } else { |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 270 | xsnprintf(header.name, sizeof(header.name), "%s.data", |
| 271 | sha1_to_hex(sha1)); |
Nguyễn Thái Ngọc Duy | 8539070 | 2012-05-03 08:51:02 +0700 | [diff] [blame] | 272 | strbuf_append_ext_header(&ext_header, "path", |
| 273 | path, pathlen); |
| 274 | } |
| 275 | } else |
| 276 | memcpy(header.name, path, pathlen); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 277 | |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 278 | if (S_ISREG(mode) && !args->convert && |
| 279 | sha1_object_info(sha1, &size) == OBJ_BLOB && |
| 280 | size > big_file_threshold) |
| 281 | buffer = NULL; |
| 282 | else if (S_ISLNK(mode) || S_ISREG(mode)) { |
Nguyễn Thái Ngọc Duy | 9cb513b | 2012-05-03 08:51:03 +0700 | [diff] [blame] | 283 | enum object_type type; |
| 284 | buffer = sha1_file_to_archive(args, path, sha1, old_mode, &type, &size); |
| 285 | if (!buffer) |
| 286 | return error("cannot read %s", sha1_to_hex(sha1)); |
| 287 | } else { |
| 288 | buffer = NULL; |
| 289 | size = 0; |
| 290 | } |
| 291 | |
| 292 | if (S_ISLNK(mode)) { |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 293 | if (size > sizeof(header.linkname)) { |
Jeff King | f2f0267 | 2015-09-24 17:06:24 -0400 | [diff] [blame] | 294 | xsnprintf(header.linkname, sizeof(header.linkname), |
| 295 | "see %s.paxheader", sha1_to_hex(sha1)); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 296 | strbuf_append_ext_header(&ext_header, "linkpath", |
| 297 | buffer, size); |
| 298 | } else |
| 299 | memcpy(header.linkname, buffer, size); |
| 300 | } |
| 301 | |
Jeff King | d1657b5 | 2016-06-30 05:09:16 -0400 | [diff] [blame] | 302 | size_in_header = size; |
| 303 | if (S_ISREG(mode) && size > USTAR_MAX_SIZE) { |
| 304 | size_in_header = 0; |
| 305 | strbuf_append_ext_header_uint(&ext_header, "size", size); |
| 306 | } |
| 307 | |
| 308 | prepare_header(args, &header, mode, size_in_header); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 309 | |
| 310 | if (ext_header.len > 0) { |
René Scharfe | 560b0e8 | 2016-08-06 16:35:38 +0200 | [diff] [blame] | 311 | write_extended_header(args, sha1, ext_header.buf, |
| 312 | ext_header.len); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 313 | } |
Pierre Habouzit | 7a604f1 | 2007-09-06 13:20:06 +0200 | [diff] [blame] | 314 | strbuf_release(&ext_header); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 315 | write_blocked(&header, sizeof(header)); |
Nguyễn Thái Ngọc Duy | 5544049 | 2012-05-03 08:51:04 +0700 | [diff] [blame] | 316 | if (S_ISREG(mode) && size > 0) { |
| 317 | if (buffer) |
| 318 | write_blocked(buffer, size); |
| 319 | else |
| 320 | err = stream_blocked(sha1); |
| 321 | } |
Nguyễn Thái Ngọc Duy | 9cb513b | 2012-05-03 08:51:03 +0700 | [diff] [blame] | 322 | free(buffer); |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 323 | return err; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 324 | } |
| 325 | |
Jeff King | 5caeeb8 | 2016-06-30 05:09:26 -0400 | [diff] [blame] | 326 | static void write_global_extended_header(struct archiver_args *args) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 327 | { |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 328 | const unsigned char *sha1 = args->commit_sha1; |
Brandon Casey | f285a2d | 2008-10-09 14:12:12 -0500 | [diff] [blame] | 329 | struct strbuf ext_header = STRBUF_INIT; |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 330 | struct ustar_header header; |
| 331 | unsigned int mode; |
Pierre Habouzit | 7a604f1 | 2007-09-06 13:20:06 +0200 | [diff] [blame] | 332 | |
Jeff King | 6e8e099 | 2016-06-30 05:09:20 -0400 | [diff] [blame] | 333 | if (sha1) |
| 334 | strbuf_append_ext_header(&ext_header, "comment", |
| 335 | sha1_to_hex(sha1), 40); |
| 336 | if (args->time > USTAR_MAX_MTIME) { |
| 337 | strbuf_append_ext_header_uint(&ext_header, "mtime", |
| 338 | args->time); |
| 339 | args->time = USTAR_MAX_MTIME; |
| 340 | } |
| 341 | |
| 342 | if (!ext_header.len) |
Jeff King | 5caeeb8 | 2016-06-30 05:09:26 -0400 | [diff] [blame] | 343 | return; |
Jeff King | 6e8e099 | 2016-06-30 05:09:20 -0400 | [diff] [blame] | 344 | |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 345 | memset(&header, 0, sizeof(header)); |
| 346 | *header.typeflag = TYPEFLAG_GLOBAL_HEADER; |
Junio C Hamano | 15c6ef7 | 2014-10-20 12:04:46 -0700 | [diff] [blame] | 347 | mode = 0100666; |
Jeff King | 5096d49 | 2015-09-24 17:06:08 -0400 | [diff] [blame] | 348 | xsnprintf(header.name, sizeof(header.name), "pax_global_header"); |
Nguyễn Thái Ngọc Duy | d240d41 | 2012-05-03 08:51:01 +0700 | [diff] [blame] | 349 | prepare_header(args, &header, mode, ext_header.len); |
| 350 | write_blocked(&header, sizeof(header)); |
| 351 | write_blocked(ext_header.buf, ext_header.len); |
Pierre Habouzit | 7a604f1 | 2007-09-06 13:20:06 +0200 | [diff] [blame] | 352 | strbuf_release(&ext_header); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 353 | } |
| 354 | |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 355 | static struct archiver **tar_filters; |
| 356 | static int nr_tar_filters; |
| 357 | static int alloc_tar_filters; |
| 358 | |
| 359 | static struct archiver *find_tar_filter(const char *name, int len) |
| 360 | { |
| 361 | int i; |
| 362 | for (i = 0; i < nr_tar_filters; i++) { |
| 363 | struct archiver *ar = tar_filters[i]; |
| 364 | if (!strncmp(ar->name, name, len) && !ar->name[len]) |
| 365 | return ar; |
| 366 | } |
| 367 | return NULL; |
| 368 | } |
| 369 | |
| 370 | static int tar_filter_config(const char *var, const char *value, void *data) |
| 371 | { |
| 372 | struct archiver *ar; |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 373 | const char *name; |
| 374 | const char *type; |
| 375 | int namelen; |
| 376 | |
Jeff King | 785a042 | 2013-01-23 01:23:27 -0500 | [diff] [blame] | 377 | if (parse_config_key(var, "tar", &name, &namelen, &type) < 0 || !name) |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 378 | return 0; |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 379 | |
| 380 | ar = find_tar_filter(name, namelen); |
| 381 | if (!ar) { |
| 382 | ar = xcalloc(1, sizeof(*ar)); |
| 383 | ar->name = xmemdupz(name, namelen); |
| 384 | ar->write_archive = write_tar_filter_archive; |
| 385 | ar->flags = ARCHIVER_WANT_COMPRESSION_LEVELS; |
| 386 | ALLOC_GROW(tar_filters, nr_tar_filters + 1, alloc_tar_filters); |
| 387 | tar_filters[nr_tar_filters++] = ar; |
| 388 | } |
| 389 | |
| 390 | if (!strcmp(type, "command")) { |
| 391 | if (!value) |
| 392 | return config_error_nonbool(var); |
| 393 | free(ar->data); |
| 394 | ar->data = xstrdup(value); |
| 395 | return 0; |
| 396 | } |
Jeff King | 7b97730 | 2011-06-21 23:17:35 -0400 | [diff] [blame] | 397 | if (!strcmp(type, "remote")) { |
| 398 | if (git_config_bool(var, value)) |
| 399 | ar->flags |= ARCHIVER_REMOTE; |
| 400 | else |
| 401 | ar->flags &= ~ARCHIVER_REMOTE; |
| 402 | return 0; |
| 403 | } |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
Johannes Schindelin | ef90d6d | 2008-05-14 18:46:53 +0100 | [diff] [blame] | 408 | static int git_tar_config(const char *var, const char *value, void *cb) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 409 | { |
| 410 | if (!strcmp(var, "tar.umask")) { |
Junio C Hamano | cc1816b | 2008-02-08 20:38:22 -0800 | [diff] [blame] | 411 | if (value && !strcmp(value, "user")) { |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 412 | tar_umask = umask(0); |
| 413 | umask(tar_umask); |
| 414 | } else { |
| 415 | tar_umask = git_config_int(var, value); |
| 416 | } |
| 417 | return 0; |
| 418 | } |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 419 | |
| 420 | return tar_filter_config(var, value, cb); |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 421 | } |
| 422 | |
Jeff King | 4d7c989 | 2011-06-21 21:24:07 -0400 | [diff] [blame] | 423 | static int write_tar_archive(const struct archiver *ar, |
| 424 | struct archiver_args *args) |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 425 | { |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 426 | int err = 0; |
| 427 | |
Jeff King | 5caeeb8 | 2016-06-30 05:09:26 -0400 | [diff] [blame] | 428 | write_global_extended_header(args); |
| 429 | err = write_archive_entries(args, write_tar_entry); |
René Scharfe | 562e25a | 2008-07-14 21:22:24 +0200 | [diff] [blame] | 430 | if (!err) |
| 431 | write_trailer(); |
| 432 | return err; |
Rene Scharfe | 3d74982 | 2006-09-24 17:31:10 +0200 | [diff] [blame] | 433 | } |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 434 | |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 435 | static int write_tar_filter_archive(const struct archiver *ar, |
| 436 | struct archiver_args *args) |
| 437 | { |
| 438 | struct strbuf cmd = STRBUF_INIT; |
René Scharfe | d318027 | 2014-08-19 21:09:35 +0200 | [diff] [blame] | 439 | struct child_process filter = CHILD_PROCESS_INIT; |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 440 | const char *argv[2]; |
| 441 | int r; |
| 442 | |
| 443 | if (!ar->data) |
| 444 | die("BUG: tar-filter archiver called with no filter defined"); |
| 445 | |
| 446 | strbuf_addstr(&cmd, ar->data); |
| 447 | if (args->compression_level >= 0) |
| 448 | strbuf_addf(&cmd, " -%d", args->compression_level); |
| 449 | |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 450 | argv[0] = cmd.buf; |
| 451 | argv[1] = NULL; |
| 452 | filter.argv = argv; |
| 453 | filter.use_shell = 1; |
| 454 | filter.in = -1; |
| 455 | |
| 456 | if (start_command(&filter) < 0) |
| 457 | die_errno("unable to start '%s' filter", argv[0]); |
| 458 | close(1); |
| 459 | if (dup2(filter.in, 1) < 0) |
| 460 | die_errno("unable to redirect descriptor"); |
| 461 | close(filter.in); |
| 462 | |
| 463 | r = write_tar_archive(ar, args); |
| 464 | |
| 465 | close(1); |
| 466 | if (finish_command(&filter) != 0) |
| 467 | die("'%s' filter reported error", argv[0]); |
| 468 | |
| 469 | strbuf_release(&cmd); |
| 470 | return r; |
| 471 | } |
| 472 | |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 473 | static struct archiver tar_archiver = { |
| 474 | "tar", |
| 475 | write_tar_archive, |
Jeff King | 7b97730 | 2011-06-21 23:17:35 -0400 | [diff] [blame] | 476 | ARCHIVER_REMOTE |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 477 | }; |
| 478 | |
| 479 | void init_tar_archiver(void) |
| 480 | { |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 481 | int i; |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 482 | register_archiver(&tar_archiver); |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 483 | |
Jeff King | 0e804e0 | 2011-06-21 21:27:35 -0400 | [diff] [blame] | 484 | tar_filter_config("tar.tgz.command", "gzip -cn", NULL); |
Jeff King | 7b97730 | 2011-06-21 23:17:35 -0400 | [diff] [blame] | 485 | tar_filter_config("tar.tgz.remote", "true", NULL); |
Jeff King | 0e804e0 | 2011-06-21 21:27:35 -0400 | [diff] [blame] | 486 | tar_filter_config("tar.tar.gz.command", "gzip -cn", NULL); |
Jeff King | 7b97730 | 2011-06-21 23:17:35 -0400 | [diff] [blame] | 487 | tar_filter_config("tar.tar.gz.remote", "true", NULL); |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 488 | git_config(git_tar_config, NULL); |
Jeff King | 767cf45 | 2011-06-21 21:26:31 -0400 | [diff] [blame] | 489 | for (i = 0; i < nr_tar_filters; i++) { |
| 490 | /* omit any filters that never had a command configured */ |
| 491 | if (tar_filters[i]->data) |
| 492 | register_archiver(tar_filters[i]); |
| 493 | } |
Jeff King | 13e0f88 | 2011-06-21 21:23:33 -0400 | [diff] [blame] | 494 | } |