From e2f9334cd84ff8dd4c65c850825e089a6c747601 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Wed, 12 Jun 2019 17:11:08 +0200 Subject: Add utility to turn a squashfs image into a POSIX tar archvie Signed-off-by: David Oberhollenzer --- tar/tar.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 tar/tar.h (limited to 'tar/tar.h') diff --git a/tar/tar.h b/tar/tar.h new file mode 100644 index 0000000..62c612a --- /dev/null +++ b/tar/tar.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +#ifndef TAR_H +#define TAR_H + +#include "fstree.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]; + char prefix[155]; + char padding[12]; +} tar_header_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_PAX 'x' + +#define TAR_MAGIC "ustar" +#define TAR_VERSION "00" + +/* + Returns < 0 on failure, > 0 if cannot encode, 0 on success. + Prints error/warning messages to stderr. +*/ +int write_tar_header(int fd, const fstree_t *fs, const tree_node_t *n, + const char *name); + +#endif /* TAR_H */ -- cgit v1.2.3