1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
|
/* wrapper around libarchive
*
* 8/9/23
* - extracted from dzsave
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG_VERBOSE
#define VIPS_DEBUG
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "pforeign.h"
#ifdef HAVE_LIBARCHIVE
#include <archive.h>
#include <archive_entry.h>
static GMutex *vips_libarchive_mutex = NULL;
struct _VipsArchive {
// prepend filenames with this for filesystem output
char *base_dirname;
// write a zip to a target
struct archive *archive;
VipsTarget *target;
};
void
vips__archive_free(VipsArchive *archive)
{
// flush any pending writes to zip output
if (archive->archive)
archive_write_close(archive->archive);
VIPS_FREE(archive->base_dirname);
VIPS_FREEF(archive_write_free, archive->archive);
VIPS_FREE(archive);
}
static ssize_t
zip_write_target_cb(struct archive *a, void *client_data,
const void *data, size_t length)
{
VipsArchive *archive = (VipsArchive *) client_data;
if (vips_target_write(archive->target, data, length))
return -1;
return length;
}
static int
zip_close_target_cb(struct archive *a, void *client_data)
{
VipsArchive *archive = (VipsArchive *) client_data;
if (vips_target_end(archive->target))
return ARCHIVE_FATAL;
return ARCHIVE_OK;
}
static void *
vips__archive_once_init(void *client)
{
vips_libarchive_mutex = vips_g_mutex_new();
return NULL;
}
static void
vips__archive_init(void)
{
static GOnce once = G_ONCE_INIT;
VIPS_ONCE(&once, vips__archive_once_init, NULL);
}
// write to a filesystem directory
VipsArchive *
vips__archive_new_to_dir(const char *base_dirname)
{
VipsArchive *archive;
vips__archive_init();
if (!(archive = VIPS_NEW(NULL, VipsArchive)))
return NULL;
archive->base_dirname = g_strdup(base_dirname);
return archive;
}
// write a zip to a target
VipsArchive *
vips__archive_new_to_target(VipsTarget *target,
const char *base_dirname, int compression)
{
VipsArchive *archive;
#ifdef DEBUG
printf("vips__archive_new_to_target: base_dirname = %s, compression = %d\n",
base_dirname, compression);
#endif /*DEBUG*/
vips__archive_init();
if (!(archive = VIPS_NEW(NULL, VipsArchive)))
return NULL;
archive->target = target;
archive->base_dirname = g_strdup(base_dirname);
if (!(archive->archive = archive_write_new())) {
vips_error("archive", "%s", _("unable to create archive"));
vips__archive_free(archive);
return NULL;
}
/* Set format to zip.
*/
if (archive_write_set_format(archive->archive, ARCHIVE_FORMAT_ZIP)) {
vips_error("archive", "%s", _("unable to set zip format"));
vips__archive_free(archive);
return NULL;
}
/* Remap compression=-1 to compression=6.
*/
if (compression == -1)
compression = 6; /* Z_DEFAULT_COMPRESSION */
#if ARCHIVE_VERSION_NUMBER >= 3002000
/* Deflate compression requires libarchive >= v3.2.0.
* https://github.com/libarchive/libarchive/pull/84
*/
char compression_string[2] = { '0' + compression, 0 };
if (archive_write_set_format_option(archive->archive, "zip",
"compression-level", compression_string)) {
vips_error("archive", "%s", _("unable to set compression"));
vips__archive_free(archive);
return NULL;
}
#else
if (compression > 0)
g_warning("libarchive >= v3.2.0 required for Deflate compression");
#endif
/* Do not pad last block.
*/
if (archive_write_set_bytes_in_last_block(archive->archive, 1)) {
vips_error("archive", "%s", _("unable to set padding"));
vips__archive_free(archive);
return NULL;
}
/* Register target callback functions.
*/
if (archive_write_open(archive->archive, archive, NULL,
zip_write_target_cb, zip_close_target_cb)) {
vips_error("archive", "%s", _("unable to open for write"));
vips__archive_free(archive);
return NULL;
}
return archive;
}
static int
vips__archive_mkdir_file(VipsArchive *archive, const char *dirname)
{
char *path;
path = g_build_filename(archive->base_dirname, dirname, NULL);
if (g_mkdir_with_parents(path, 0777) &&
errno != EEXIST) {
int save_errno = errno;
char *utf8name;
utf8name = g_filename_display_name(path);
vips_error("archive", _("unable to create directory \"%s\", %s"),
utf8name, g_strerror(save_errno));
g_free(utf8name);
g_free(path);
return -1;
}
g_free(path);
return 0;
}
int
vips__archive_mkdir(VipsArchive *archive, const char *dirname)
{
/* The ZIP format maintains a hierarchical structure, avoiding
* the need to create individual entries for each (sub-)directory.
*/
if (archive->archive)
return 0;
return vips__archive_mkdir_file(archive, dirname);
}
static int
vips__archive_mkfile_zip(VipsArchive *archive,
const char *filename, void *buf, size_t len)
{
struct archive_entry *entry;
vips__worker_lock(vips_libarchive_mutex);
if (!(entry = archive_entry_new())) {
vips_error("archive", "%s", _("unable to create entry"));
g_mutex_unlock(vips_libarchive_mutex);
return -1;
}
char *path;
path = g_build_filename(archive->base_dirname, filename, NULL);
archive_entry_set_pathname(entry, path);
archive_entry_set_mode(entry, S_IFREG | 0664);
archive_entry_set_size(entry, len);
g_free(path);
if (archive_write_header(archive->archive, entry)) {
vips_error("archive", "%s", _("unable to write header"));
archive_entry_free(entry);
g_mutex_unlock(vips_libarchive_mutex);
return -1;
}
archive_entry_free(entry);
if (archive_write_data(archive->archive, buf, len) != len) {
vips_error("archive", "%s", _("unable to write data"));
g_mutex_unlock(vips_libarchive_mutex);
return -1;
}
g_mutex_unlock(vips_libarchive_mutex);
return 0;
}
static int
vips__archive_mkfile_file(VipsArchive *archive,
const char *filename, void *buf, size_t len)
{
char *path;
FILE *f;
path = g_build_filename(archive->base_dirname, filename, NULL);
if (!(f = vips__file_open_write(path, FALSE))) {
g_free(path);
return -1;
}
if (vips__file_write(buf, sizeof(char), len, f)) {
g_free(path);
fclose(f);
return -1;
}
fclose(f);
g_free(path);
return 0;
}
int
vips__archive_mkfile(VipsArchive *archive,
const char *filename, void *buf, size_t len)
{
return ((archive->archive)
? vips__archive_mkfile_zip
: vips__archive_mkfile_file)(archive, filename, buf, len);
}
#endif /*HAVE_LIBARCHIVE*/
|