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/* Copyright 2016 Software Freedom Conservancy Inc.
*
* This software is licensed under the GNU Lesser General Public License
* (version 2.1 or later). See the COPYING file in this distribution.
*/
namespace LibraryFiles {
static bool use_fallback_copy_func = false;
public void select_copy_function() {
var import_dir = AppDirs.get_import_dir();
try {
var info = import_dir.query_filesystem_info("filesystem::type", null);
use_fallback_copy_func = info.get_attribute_as_string("filesystem::type") == "nfs";
} catch (Error error) {
critical ("Failed to query fs type: %s", error.message);
use_fallback_copy_func = true;
}
info ("Using fallback copy: %s", use_fallback_copy_func.to_string());
}
// This method uses global::generate_unique_file_at in order to "claim" a file in the filesystem.
// Thus, when the method returns success a file may exist already, and should be overwritten.
//
// This function is thread safe.
public File? generate_unique_file(string basename, MediaMetadata? metadata, DateTime ts, out bool collision)
throws Error {
// use exposure timestamp over the supplied one (which probably comes from the file's
// modified time, or is simply time()), unless it's zero, in which case use current time
DateTime timestamp = ts;
if (metadata != null) {
MetadataDateTime? date_time = metadata.get_creation_date_time();
if (date_time != null)
timestamp = date_time.get_timestamp();
else if (timestamp == null)
timestamp = new DateTime.now_utc();
}
// build a directory tree inside the library
File dir = AppDirs.get_baked_import_dir(timestamp);
try {
dir.make_directory_with_parents(null);
} catch (Error err) {
if (!(err is IOError.EXISTS))
throw err;
// silently ignore not creating a directory that already exists
}
// Optionally convert to lower-case.
string newbasename = convert_basename(basename);
return global::generate_unique_file(dir, newbasename, out collision);
}
// Create the basename for files in the library.
// Depending on the setting USE_LOWERCASE_FILENAMES the basename will be converted to lower case or not
public string convert_basename(string basename) {
if (Config.Facade.get_instance().get_use_lowercase_filenames()) {
return basename.down();
} else {
return basename;
}
}
// This function is thread-safe.
private File duplicate(File src, FileProgressCallback? progress_callback, bool blacklist) throws Error {
DateTime? timestamp = null;
try {
timestamp = query_file_modified(src);
} catch (Error err) {
critical("Unable to access file modification for %s: %s", src.get_path(), err.message);
}
MediaMetadata? metadata = null;
if (VideoReader.is_supported_video_file(src)) {
VideoReader reader = new VideoReader(src);
try {
metadata = reader.read_metadata();
} catch (Error err) {
// ignored, leave metadata as null
}
} else {
PhotoFileReader reader = PhotoFileFormat.get_by_file_extension(src).create_reader(
src.get_path());
try {
metadata = reader.read_metadata();
} catch (Error err) {
// ignored, leave metadata as null
}
}
bool collision;
File? dest = generate_unique_file(src.get_basename(), metadata, timestamp, out collision);
if (dest == null)
throw new FileError.FAILED("Unable to generate unique pathname for destination");
if (blacklist)
LibraryMonitor.blacklist_file(dest, "LibraryFiles.duplicate");
try {
if (use_fallback_copy_func) {
fallback_copy(src, dest, progress_callback);
} else {
src.copy(dest, FileCopyFlags.ALL_METADATA | FileCopyFlags.OVERWRITE, null, progress_callback);
}
if (blacklist)
LibraryMonitor.unblacklist_file(dest);
} catch (Error err) {
message("There was a problem copying %s: %s", src.get_path(), err.message);
if (blacklist && (md5_file(src) != md5_file(dest)))
LibraryMonitor.unblacklist_file(dest);
}
// Make file writable by getting current Unix mode and or it with 600 (user read/write)
try {
FileInfo info = dest.query_info(FileAttribute.UNIX_MODE, FileQueryInfoFlags.NONE);
uint32 mode = info.get_attribute_uint32(FileAttribute.UNIX_MODE) | 0600;
if (!dest.set_attribute_uint32(FileAttribute.UNIX_MODE, mode, FileQueryInfoFlags.NONE)) {
warning("Could not make file writable");
}
} catch (Error err) {
warning("Could not make file writable: %s", err.message);
}
return dest;
}
public void fallback_copy(File? src, File? dst, FileProgressCallback? callback) throws Error {
if (src == null || dst == null) {
return;
}
var f = FileStream.open(src.get_path(), "rb");
if (f != null) {
f.seek(0, FileSeek.END);
var size = f.tell();
f.seek(0, FileSeek.SET);
debug ("Copying %s to %s, size is %ld", src.get_path(), dst.get_path(), size);
var g = FileStream.open(dst.get_path(), "wb");
if (g != null) {
uint8 buffer[4096];
size_t written = 0;
while (!f.eof()) {
var len = f.read(buffer);
if (len > 0) {
var out_len = g.write(buffer[0:len]);
if (out_len < 0) {
critical("Failed to write to file %s: %m", dst.get_path());
throw new IOError.FAILED("Failed to write to %s", dst.get_path());
}
written += len;
if (callback != null)
callback (written, size);
} else if (len < 0) {
critical("Failed to read from file %s: %m", src.get_path());
throw new IOError.FAILED("Failed to read from %s", src.get_path());
}
}
} else {
critical ("Failed to open %s: %m", dst.get_path());
throw new IOError.FAILED("Failed to open %s", dst.get_path());
}
} else {
critical ("Failed to open %s: %m", src.get_path());
throw new IOError.FAILED("Failed to open %s", src.get_path());
}
}
}
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