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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2022-06-29 18:21:58 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2022-07-08 19:17:35 +0200
commite6a19ba1a05f77f051187a6b1a828ee6d39ce052 (patch)
treec8a1566b10883edbe4a8bc9a724461f4003aaa10 /include
parent359d71e90050a8b83f7bc7d2ecd4ff29c477cc22 (diff)
Cleanup: split libtar header, move to sub directory
Some of the on-disk format internals are moved to a separate header and some of the stuff from internal.h is moved to that format header. C++ guards are added in addtion. Everything PAX related is moved to pax_header.c, some internal functions are marked as static. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'include')
-rw-r--r--include/common.h1
-rw-r--r--include/tar/format.h105
-rw-r--r--include/tar/tar.h (renamed from include/tar.h)83
3 files changed, 116 insertions, 73 deletions
diff --git a/include/common.h b/include/common.h
index ab07461..91dccaa 100644
--- a/include/common.h
+++ b/include/common.h
@@ -25,7 +25,6 @@
#include "io/std.h"
#include "compat.h"
#include "fstree.h"
-#include "tar.h"
#include <stddef.h>
diff --git a/include/tar/format.h b/include/tar/format.h
new file mode 100644
index 0000000..53a4665
--- /dev/null
+++ b/include/tar/format.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * format.h
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#ifndef TAR_FORMAT_H
+#define TAR_FORMAT_H
+
+#include "sqfs/predef.h"
+
+typedef struct {
+ char name[100];
+ char mode[8];
+ char uid[8];
+ char gid[8];
+ char size[12];
+ char mtime[12];
+ char chksum[8];
+ char typeflag;
+ char linkname[100];
+ char magic[6];
+ char version[2];
+ char uname[32];
+ char gname[32];
+ char devmajor[8];
+ char devminor[8];
+ union {
+ struct {
+ char prefix[155];
+ char padding[12];
+ } posix;
+
+ struct {
+ char atime[12];
+ char ctime[12];
+ char offset[12];
+ char deprecated[4];
+ char unused;
+ struct {
+ char offset[12];
+ char numbytes[12];
+ } sparse[4];
+ char isextended;
+ char realsize[12];
+ char padding[17];
+ } gnu;
+ } tail;
+} tar_header_t;
+
+typedef struct {
+ struct {
+ char offset[12];
+ char numbytes[12];
+ } sparse[21];
+ char isextended;
+ char padding[7];
+} gnu_sparse_t;
+
+#define TAR_TYPE_FILE '0'
+#define TAR_TYPE_LINK '1'
+#define TAR_TYPE_SLINK '2'
+#define TAR_TYPE_CHARDEV '3'
+#define TAR_TYPE_BLOCKDEV '4'
+#define TAR_TYPE_DIR '5'
+#define TAR_TYPE_FIFO '6'
+
+#define TAR_TYPE_GNU_SLINK 'K'
+#define TAR_TYPE_GNU_PATH 'L'
+#define TAR_TYPE_GNU_SPARSE 'S'
+
+#define TAR_TYPE_PAX 'x'
+#define TAR_TYPE_PAX_GLOBAL 'g'
+
+#define TAR_MAGIC "ustar"
+#define TAR_VERSION "00"
+
+#define TAR_MAGIC_OLD "ustar "
+#define TAR_VERSION_OLD " "
+
+#define TAR_RECORD_SIZE (512)
+
+/* artificially imposed implementation limits */
+#define TAR_MAX_SYMLINK_LEN (65536)
+#define TAR_MAX_PATH_LEN (65536)
+#define TAR_MAX_PAX_LEN (65536)
+#define TAR_MAX_SPARSE_ENT (65536)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int read_octal(const char *str, int digits, sqfs_u64 *out);
+
+int read_number(const char *str, int digits, sqfs_u64 *out);
+
+void update_checksum(tar_header_t *hdr);
+
+bool is_checksum_valid(const tar_header_t *hdr);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TAR_FORMAT_H */
diff --git a/include/tar.h b/include/tar/tar.h
index dadc16e..128464e 100644
--- a/include/tar.h
+++ b/include/tar/tar.h
@@ -22,54 +22,6 @@ typedef struct sparse_map_t {
sqfs_u64 count;
} sparse_map_t;
-typedef struct {
- char name[100];
- char mode[8];
- char uid[8];
- char gid[8];
- char size[12];
- char mtime[12];
- char chksum[8];
- char typeflag;
- char linkname[100];
- char magic[6];
- char version[2];
- char uname[32];
- char gname[32];
- char devmajor[8];
- char devminor[8];
- union {
- struct {
- char prefix[155];
- char padding[12];
- } posix;
-
- struct {
- char atime[12];
- char ctime[12];
- char offset[12];
- char deprecated[4];
- char unused;
- struct {
- char offset[12];
- char numbytes[12];
- } sparse[4];
- char isextended;
- char realsize[12];
- char padding[17];
- } gnu;
- } tail;
-} tar_header_t;
-
-typedef struct {
- struct {
- char offset[12];
- char numbytes[12];
- } sparse[21];
- char isextended;
- char padding[7];
-} gnu_sparse_t;
-
typedef struct tar_xattr_t {
struct tar_xattr_t *next;
char *key;
@@ -95,28 +47,9 @@ typedef struct {
sqfs_s64 mtime;
} tar_header_decoded_t;
-#define TAR_TYPE_FILE '0'
-#define TAR_TYPE_LINK '1'
-#define TAR_TYPE_SLINK '2'
-#define TAR_TYPE_CHARDEV '3'
-#define TAR_TYPE_BLOCKDEV '4'
-#define TAR_TYPE_DIR '5'
-#define TAR_TYPE_FIFO '6'
-
-#define TAR_TYPE_GNU_SLINK 'K'
-#define TAR_TYPE_GNU_PATH 'L'
-#define TAR_TYPE_GNU_SPARSE 'S'
-
-#define TAR_TYPE_PAX 'x'
-#define TAR_TYPE_PAX_GLOBAL 'g'
-
-#define TAR_MAGIC "ustar"
-#define TAR_VERSION "00"
-
-#define TAR_MAGIC_OLD "ustar "
-#define TAR_VERSION_OLD " "
-
-#define TAR_RECORD_SIZE (512)
+#ifdef __cplusplus
+extern "C" {
+#endif
/*
Returns < 0 on failure, > 0 if cannot encode, 0 on success.
@@ -140,8 +73,6 @@ int skip_entry(istream_t *fp, sqfs_u64 size);
int read_header(istream_t *fp, tar_header_decoded_t *out);
-void free_xattr_list(tar_xattr_t *list);
-
void clear_header(tar_header_decoded_t *hdr);
/*
@@ -150,4 +81,12 @@ void clear_header(tar_header_decoded_t *hdr);
*/
int padd_file(ostream_t *fp, sqfs_u64 size);
+void free_sparse_list(sparse_map_t *sparse);
+
+void free_xattr_list(tar_xattr_t *list);
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* TAR_H */