libarchive压缩解压文件

存在中文乱码问题

官网： libarchive - 用于读取和写入 tar、cpio、zip、ISO 和其他存档格式的 C 库和命令行工具 @ GitHub

GitHub源码：Bluewind/libarchive: Multi-format archive and compression library (github.com)

参考： C++ archive_write_data函数代码示例 - 纯净天空 (vimsky.com)

来自官网例子：Examples · libarchive/libarchive Wiki (github.com)

下载 Libarchive downloads libarchive-v3.6.0-win64

解压，和文件拷贝

参考：libarchive/examples/untar.c at master · Bluewind/libarchive (github.com)

项目实现：untar.c

/*** @Brief :解压文件* @param  filename 解压文件名* @param  outPath 解压路径，空为当前路径* @return true* @return false*/static bool extract(const char *filename, const char *outPath = nullptr);
bool CDataFactory::extract(const char *filename, const char *outPath)
{if (filename && outPath)qDebug() << "extract filePath=" << filename << ",outPath=" << outPath;if (!filename){qCritical() << " extract filename = nullptr";return false;}if (outPath){QDir dir(outPath);if (!dir.exists()){dir.mkdir(outPath);}}struct archive *a;struct archive *ext;struct archive_entry *entry;int flags;int r;bool result = true;/* Select which attributes we want to restore. */flags = ARCHIVE_EXTRACT_TIME;flags |= ARCHIVE_EXTRACT_PERM;flags |= ARCHIVE_EXTRACT_ACL;flags |= ARCHIVE_EXTRACT_FFLAGS;a = archive_read_new();archive_read_support_format_all(a);// archive_read_support_filter_all(a);archive_read_support_compression_all(a);ext = archive_write_disk_new();archive_write_disk_set_options(ext, flags);archive_write_disk_set_standard_lookup(ext);r = archive_read_open_filename(a, filename, 1024 * 1024);if (r){qCritical() << "archive_read_open_filename faild";result = false;goto finish;}for (;;){r = archive_read_next_header(a, &entry);if (r == ARCHIVE_EOF)break;if (r < ARCHIVE_OK)qWarning() << "archive_read_next_header faild, < ARCHIVE_OK err=" << archive_error_string(a);if (r < ARCHIVE_WARN){qCritical() << "archive_read_next_header faild,err=" << archive_error_string(a);result = false;goto finish;}if (outPath){const char *pathEntry = archive_entry_pathname(entry);if (pathEntry){std::string path = std::string(outPath) + pathEntry;archive_entry_set_pathname(entry, path.c_str());}}r = archive_write_header(ext, entry);if (r < ARCHIVE_OK)qWarning() << "archive_write_header faild,<ARCHIVE_OK err=" << archive_error_string(ext);else if (archive_entry_size(entry) > 0){r = copy_data(a, ext);if (r < ARCHIVE_WARN){qCritical() << "copy_data faild";result = false;goto finish;}}r = archive_write_finish_entry(ext);if (r < ARCHIVE_OK){qWarning() << "archive_write_finish_entry faild,<ARCHIVE_OK err=" << archive_error_string(ext);}if (r < ARCHIVE_WARN){qCritical() << "archive_write_finish_entry faild  return false!";result = false;goto finish;}}
finish:archive_read_close(a);archive_read_free(a);archive_write_close(ext);archive_write_free(ext);return result;
}static int copy_data(struct archive *ar, struct archive *aw)
{int r;const void *buff;size_t size;la_int64_t offset;for (;;){r = archive_read_data_block(ar, &buff, &size, &offset);if (r == ARCHIVE_EOF)return (ARCHIVE_OK);if (r < ARCHIVE_OK)return (r);r = archive_write_data_block(aw, buff, size, offset);if (r < ARCHIVE_OK){fprintf(stderr, "%s\n", archive_error_string(aw));return (r);}}
}

压缩文件

voidwrite_archive(const char *outname, const char **filename)
{struct archive *a;struct archive_entry *entry;struct stat st;char buff[8192];int len;int fd;a = archive_write_new();archive_write_add_filter_gzip(a);archive_write_set_format_pax_restricted(a); // Note 1archive_write_open_filename(a, outname);while (*filename) {stat(*filename, &st);entry = archive_entry_new(); // Note 2archive_entry_set_pathname(entry, *filename);archive_entry_set_size(entry, st.st_size); // Note 3archive_entry_set_filetype(entry, AE_IFREG);archive_entry_set_perm(entry, 0644);archive_write_header(a, entry);fd = open(*filename, O_RDONLY);len = read(fd, buff, sizeof(buff));while ( len > 0 ) {archive_write_data(a, buff, len);len = read(fd, buff, sizeof(buff));}close(fd);archive_entry_free(entry);filename++;}archive_write_close(a); // Note 4archive_write_free(a); // Note 5
}int main(int argc, const char **argv)
{const char *outname;argv++;outname = *argv++;write_archive(outname, argv);return 0;
}

压缩

minitar.c

#makefile
#
# Adjust the following to control which options minitar gets
# built with.  See comments in minitar.c for details.
#
CFLAGS=                \-DNO_BZIP2_CREATE    \-I../../libarchive    \-g# How to link against libarchive.
LIBARCHIVE=    ../../libarchive/libarchive.aall: minitarminitar: minitar.occ -g -o minitar minitar.o $(LIBARCHIVE) -lz -lbz2strip minitarls -l minitarminitar.o: minitar.cclean::rm -f *.orm -f minitarrm -f *~

/*-
* This file is in the public domain.
* Do with it as you will.
*//*-
* This is a compact "tar" program whose primary goal is small size.
* Statically linked, it can be very small indeed.  This serves a number
* of goals:
*   o a testbed for libarchive (to check for link pollution),
*   o a useful tool for space-constrained systems (boot floppies, etc),
*   o a place to experiment with new implementation ideas for bsdtar,
*   o a small program to demonstrate libarchive usage.
*
* Use the following macros to suppress features:
*   NO_BZIP2 - Implies NO_BZIP2_CREATE and NO_BZIP2_EXTRACT
*   NO_BZIP2_CREATE - Suppress bzip2 compression support.
*   NO_BZIP2_EXTRACT - Suppress bzip2 auto-detection and decompression.
*   NO_COMPRESS - Implies NO_COMPRESS_CREATE and NO_COMPRESS_EXTRACT
*   NO_COMPRESS_CREATE - Suppress compress(1) compression support
*   NO_COMPRESS_EXTRACT - Suppress compress(1) auto-detect and decompression.
*   NO_CREATE - Suppress all archive creation support.
*   NO_CPIO_EXTRACT - Suppress auto-detect and dearchiving of cpio archives.
*   NO_GZIP - Implies NO_GZIP_CREATE and NO_GZIP_EXTRACT
*   NO_GZIP_CREATE - Suppress gzip compression support.
*   NO_GZIP_EXTRACT - Suppress gzip auto-detection and decompression.
*   NO_LOOKUP - Try to avoid getpw/getgr routines, which can be very large
*   NO_TAR_EXTRACT - Suppress tar extraction
*
* With all of the above macros defined (except NO_TAR_EXTRACT), you
* get a very small program that can recognize and extract essentially
* any uncompressed tar archive.  On FreeBSD 5.1, this minimal program
* is under 64k, statically linked, which compares rather favorably to
*         main(){printf("hello, world");}
* which is over 60k statically linked on the same operating system.
* Without any of the above macros, you get a static executable of
* about 180k with a lot of very sophisticated modern features.
* Obviously, it's trivial to add support for ISO, Zip, mtree,
* lzma/xz, etc.  Just fill in the appropriate setup calls.
*/#include <sys/types.h>
#include <sys/stat.h>#include <archive.h>
#include <archive_entry.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>/*
* NO_CREATE implies NO_BZIP2_CREATE and NO_GZIP_CREATE and NO_COMPRESS_CREATE.
*/
#ifdef NO_CREATE
#undef NO_BZIP2_CREATE
#define NO_BZIP2_CREATE
#undef NO_COMPRESS_CREATE
#define NO_COMPRESS_CREATE
#undef NO_GZIP_CREATE
#define NO_GZIP_CREATE
#endif/*
* The combination of NO_BZIP2_CREATE and NO_BZIP2_EXTRACT is
* equivalent to NO_BZIP2.
*/
#ifdef NO_BZIP2_CREATE
#ifdef NO_BZIP2_EXTRACT
#undef NO_BZIP2
#define NO_BZIP2
#endif
#endif#ifdef NO_BZIP2
#undef NO_BZIP2_EXTRACT
#define NO_BZIP2_EXTRACT
#undef NO_BZIP2_CREATE
#define NO_BZIP2_CREATE
#endif/*
* The combination of NO_COMPRESS_CREATE and NO_COMPRESS_EXTRACT is
* equivalent to NO_COMPRESS.
*/
#ifdef NO_COMPRESS_CREATE
#ifdef NO_COMPRESS_EXTRACT
#undef NO_COMPRESS
#define NO_COMPRESS
#endif
#endif#ifdef NO_COMPRESS
#undef NO_COMPRESS_EXTRACT
#define NO_COMPRESS_EXTRACT
#undef NO_COMPRESS_CREATE
#define NO_COMPRESS_CREATE
#endif/*
* The combination of NO_GZIP_CREATE and NO_GZIP_EXTRACT is
* equivalent to NO_GZIP.
*/
#ifdef NO_GZIP_CREATE
#ifdef NO_GZIP_EXTRACT
#undef NO_GZIP
#define NO_GZIP
#endif
#endif#ifdef NO_GZIP
#undef NO_GZIP_EXTRACT
#define NO_GZIP_EXTRACT
#undef NO_GZIP_CREATE
#define NO_GZIP_CREATE
#endif#ifndef NO_CREATE
static void     create(const char *filename, int compress, const char **argv);
#endif
static void     errmsg(const char *);
static void     extract(const char *filename, int do_extract, int flags);
static int      copy_data(struct archive *, struct archive *);
static void     msg(const char *);
static void     usage(void);static int verbose = 0;int
main(int argc, const char **argv)
{const char *filename = NULL;int compress, flags, mode, opt;(void)argc;mode = 'x';verbose = 0;compress = '\0';flags = ARCHIVE_EXTRACT_TIME;/* Among other sins, getopt(3) pulls in printf(3). */while (*++argv != NULL && **argv == '-') {const char *p = *argv + 1;while ((opt = *p++) != '\0') {switch (opt) {
#ifndef NO_CREATEcase 'c':mode = opt;break;
#endifcase 'f':if (*p != '\0')filename = p;elsefilename = *++argv;p += strlen(p);break;
#ifndef NO_BZIP2_CREATEcase 'j':compress = opt;break;
#endifcase 'p':flags |= ARCHIVE_EXTRACT_PERM;flags |= ARCHIVE_EXTRACT_ACL;flags |= ARCHIVE_EXTRACT_FFLAGS;break;case 't':mode = opt;break;case 'v':verbose++;break;case 'x':mode = opt;break;
#ifndef NO_BZIP2_CREATEcase 'y':compress = opt;break;
#endif
#ifndef NO_COMPRESS_CREATEcase 'Z':compress = opt;break;
#endif
#ifndef NO_GZIP_CREATEcase 'z':compress = opt;break;
#endifdefault:usage();}}}switch (mode) {
#ifndef NO_CREATEcase 'c':create(filename, compress, argv);break;
#endifcase 't':extract(filename, 0, flags);break;case 'x':extract(filename, 1, flags);break;}return (0);
}#ifndef NO_CREATE
static char buff[16384];static void
create(const char *filename, int compress, const char **argv)
{struct archive *a;struct archive *disk;struct archive_entry *entry;ssize_t len;int fd;a = archive_write_new();switch (compress) {
#ifndef NO_BZIP2_CREATEcase 'j': case 'y':archive_write_add_filter_bzip2(a);break;
#endif
#ifndef NO_COMPRESS_CREATEcase 'Z':archive_write_add_filter_compress(a);break;
#endif
#ifndef NO_GZIP_CREATEcase 'z':archive_write_add_filter_gzip(a);break;
#endifdefault:archive_write_add_filter_none(a);break;}archive_write_set_format_ustar(a);if (filename != NULL && strcmp(filename, "-") == 0)filename = NULL;archive_write_open_filename(a, filename);disk = archive_read_disk_new();
#ifndef NO_LOOKUParchive_read_disk_set_standard_lookup(disk);
#endifwhile (*argv != NULL) {struct archive *disk = archive_read_disk_new();int r;r = archive_read_disk_open(disk, *argv);if (r != ARCHIVE_OK) {errmsg(archive_error_string(disk));errmsg("\n");exit(1);}for (;;) {int needcr = 0;entry = archive_entry_new();r = archive_read_next_header2(disk, entry);if (r == ARCHIVE_EOF)break;if (r != ARCHIVE_OK) {errmsg(archive_error_string(disk));errmsg("\n");exit(1);}archive_read_disk_descend(disk);if (verbose) {msg("a ");msg(archive_entry_pathname(entry));needcr = 1;}r = archive_write_header(a, entry);if (r < ARCHIVE_OK) {errmsg(": ");errmsg(archive_error_string(a));needcr = 1;}if (r == ARCHIVE_FATAL)exit(1);if (r > ARCHIVE_FAILED) {
#if 0/* Ideally, we would be able to use* the same code to copy a body from* an archive_read_disk to an* archive_write that we use for* copying data from an archive_read* to an archive_write_disk.* Unfortunately, this doesn't quite* work yet. */copy_data(disk, a);
#else/* For now, we use a simpler loop to copy data* into the target archive. */fd = open(archive_entry_sourcepath(entry), O_RDONLY);len = read(fd, buff, sizeof(buff));while (len > 0) {archive_write_data(a, buff, len);len = read(fd, buff, sizeof(buff));}close(fd);
#endif}archive_entry_free(entry);if (needcr)msg("\n");}archive_read_close(disk);archive_read_free(disk);argv++;}archive_write_close(a);archive_write_free(a);
}
#endifstatic void
extract(const char *filename, int do_extract, int flags)
{struct archive *a;struct archive *ext;struct archive_entry *entry;int r;a = archive_read_new();ext = archive_write_disk_new();archive_write_disk_set_options(ext, flags);
#ifndef NO_BZIP2_EXTRACTarchive_read_support_filter_bzip2(a);
#endif
#ifndef NO_GZIP_EXTRACTarchive_read_support_filter_gzip(a);
#endif
#ifndef NO_COMPRESS_EXTRACTarchive_read_support_filter_compress(a);
#endif
#ifndef NO_TAR_EXTRACTarchive_read_support_format_tar(a);
#endif
#ifndef NO_CPIO_EXTRACTarchive_read_support_format_cpio(a);
#endif
#ifndef NO_LOOKUParchive_write_disk_set_standard_lookup(ext);
#endifif (filename != NULL && strcmp(filename, "-") == 0)filename = NULL;if ((r = archive_read_open_filename(a, filename, 10240))) {errmsg(archive_error_string(a));errmsg("\n");exit(r);}for (;;) {r = archive_read_next_header(a, &entry);if (r == ARCHIVE_EOF)break;if (r != ARCHIVE_OK) {errmsg(archive_error_string(a));errmsg("\n");exit(1);}if (verbose && do_extract)msg("x ");if (verbose || !do_extract)msg(archive_entry_pathname(entry));if (do_extract) {r = archive_write_header(ext, entry);if (r != ARCHIVE_OK)errmsg(archive_error_string(a));elsecopy_data(a, ext);}if (verbose || !do_extract)msg("\n");}archive_read_close(a);archive_read_free(a);exit(0);
}static int
copy_data(struct archive *ar, struct archive *aw)
{int r;const void *buff;size_t size;int64_t offset;for (;;) {r = archive_read_data_block(ar, &buff, &size, &offset);if (r == ARCHIVE_EOF) {errmsg(archive_error_string(ar));return (ARCHIVE_OK);}if (r != ARCHIVE_OK)return (r);r = archive_write_data_block(aw, buff, size, offset);if (r != ARCHIVE_OK) {errmsg(archive_error_string(ar));return (r);}}
}static void
msg(const char *m)
{write(1, m, strlen(m));
}static void
errmsg(const char *m)
{if (m == NULL) {m = "Error: No error description provided.\n";}write(2, m, strlen(m));
}static void
usage(void)
{
/* Many program options depend on compile options. */const char *m = "Usage: minitar [-"
#ifndef NO_CREATE"c"
#endif
#ifndef NO_BZIP2"j"
#endif"tvx"
#ifndef NO_BZIP2"y"
#endif
#ifndef NO_COMPRESS"Z"
#endif
#ifndef NO_GZIP"z"
#endif"] [-f file] [file]\n";errmsg(m);exit(1);
}