使用libarchive将目录添加到tarfile

Question

我正在尝试将一个目录添加到我正在创建的tar归档中。档案已创建，但其中没有文件。

以下是我使用libarchive的代码（directory是要标记的目录的路径的QString。）

struct archive *a;
struct archive_entry *entry;
struct stat st;
char buff[8192];
size_t bytes_read;
int fd;
// the path of the output tarfile
QByteArray outArray = (directory + ".tar").toLocal8Bit();
char *outDirectory = outArray.data();
// the path to the input directory
QByteArray inputArray = directory.toLocal8Bit();
char *inputDirectory = inputArray.data();
QFileInfo inputInfo;
inputInfo.setFile(directory);
// the name of the directory
QByteArray pathArray = inputInfo.fileName().toLocal8Bit();
char *pathDirectory = pathArray.data();
a = archive_write_new();
archive_write_add_filter_gzip(a);
archive_write_set_format_pax_restricted(a);
archive_write_open_filename(a, outDirectory);
entry = archive_entry_new();
stat(inputDirectory, &st);
archive_entry_set_pathname(entry, pathDirectory);
archive_entry_set_filetype(entry, AE_IFDIR);
archive_entry_copy_stat(entry, &st);
archive_write_header(a, entry);
fd = open(inputDirectory, O_RDONLY);
bytes_read = read(fd, buff, sizeof(buff));
while (bytes_read > 0) {
    archive_write_data(a, buff, bytes_read);
    bytes_read = read(fd, buff, sizeof(buff));
}
close(fd);
archive_write_finish_entry(a);
archive_write_close(a);
archive_write_free(a);

Answer 1

您的代码逻辑不正确。您正在尝试读取一个目录，而您应该读取该目录中的文件。。。您需要这样的东西来迭代文件：

QDirIterator it("/etc", QDirIterator::Subdirectories);
while (it.hasNext())
    qDebug() << it.next();

这是一个概念验证代码，可以解决您的问题。

#include <QString>
#include <QByteArray>
#include <QFileInfo>
#include <QDebug>
#include <QDirIterator>
#include <archive.h>
#include <archive_entry.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main()
{
    QString directory = "/home/lpapp/tmp/stackoverflow/test";
    struct archive *a;
    struct archive_entry *entry;
    struct stat st;
    char buff[8192];
    size_t bytes_read;
    int fd;
    QByteArray outArray = directory.toLocal8Bit() + ".tar";
    char *outDirectory = outArray.data();
    qDebug() << outDirectory;
    QByteArray inputArray = directory.toLocal8Bit();
    char *inputDirectory = inputArray.data();
    qDebug() << inputDirectory;
    QFileInfo inputInfo;
    inputInfo.setFile(directory);
    // the name of the directory
    QByteArray pathArray = inputInfo.fileName().toLocal8Bit();
    char *pathDirectory = pathArray.data();
    qDebug() << pathDirectory;
    a = archive_write_new();
    archive_write_add_filter_gzip(a);
    archive_write_set_format_pax_restricted(a);
    archive_write_open_filename(a, outDirectory);
    QDirIterator it(directory, QDirIterator::Subdirectories);
    while (it.hasNext()) {
        entry = archive_entry_new();
        stat(inputDirectory, &st);
        archive_entry_set_pathname(entry, it.next().toLocal8Bit().constData());
        archive_entry_set_filetype(entry, AE_IFDIR);
        archive_entry_copy_stat(entry, &st);
        archive_write_header(a, entry);
        fd = open(inputDirectory, O_RDONLY);
        bytes_read = read(fd, buff, sizeof(buff));
        while (bytes_read > 0) {
            archive_write_data(a, buff, bytes_read);
            bytes_read = read(fd, buff, sizeof(buff));
        }
        close(fd);
        archive_entry_free(entry);
        archive_write_finish_entry(a);
        archive_write_close(a);
        archive_write_free(a);
    }
    return 0;
}

main.pro

TEMPLATE = app
TARGET = main
QT = core
LIBS += -larchive
SOURCES += main.cpp

构建并运行

qmake && make && ./main

Answer 2

您可以尝试my库，QArchive其是非阻塞的和单螺纹的。

这里有一个压缩目录的简单代码（默认情况下是递归添加的）。

#include <QCoreApplication>
#include <QDebug>
#include <QArchive>
int main(int argc, char** argv)  {
 QCoreApplication app(argc, argv);
 QArchive::DiskCompressor Compressor("test.7z");
 Compressor.addFiles("YourDirectoryToCompress"); // Add directory or file.
 QObject::connect(&Compressor , &QArchive::DiskCompressor::finished, [&]() {
    qDebug() << "Finished!";
    app.quit();
 });
 Compressor.start();
 return app.exec();
}