*: tar-related cleanups: move struct to unarchive.h; move help to tar.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 33 insertions, 48 deletions

diff --git a/include/unarchive.h b/include/unarchive.h
index f3aa05d..b4cf160 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -113,6 +113,39 @@ typedef struct archive_handle_t {
 #define ARCHIVE_O_TRUNC             (1 << 8)
 
 
+/* POSIX tar Header Block, from POSIX 1003.1-1990  */
+#define TAR_BLOCK_SIZE 512
+#define NAME_SIZE      100
+#define NAME_SIZE_STR "100"
+typedef struct tar_header_t {       /* byte offset */
+	char name[NAME_SIZE];     /*   0-99 */
+	char mode[8];             /* 100-107 */
+	char uid[8];              /* 108-115 */
+	char gid[8];              /* 116-123 */
+	char size[12];            /* 124-135 */
+	char mtime[12];           /* 136-147 */
+	char chksum[8];           /* 148-155 */
+	char typeflag;            /* 156-156 */
+	char linkname[NAME_SIZE]; /* 157-256 */
+	/* POSIX:   "ustar" NUL "00" */
+	/* GNU tar: "ustar  " NUL */
+	/* Normally it's defined as magic[6] followed by
+	 * version[2], but we put them together to save code.
+	 */
+	char magic[8];            /* 257-264 */
+	char uname[32];           /* 265-296 */
+	char gname[32];           /* 297-328 */
+	char devmajor[8];         /* 329-336 */
+	char devminor[8];         /* 337-344 */
+	char prefix[155];         /* 345-499 */
+	char padding[12];         /* 500-512 (pad to exactly TAR_BLOCK_SIZE) */
+} tar_header_t;
+struct BUG_tar_header {
+	char c[sizeof(tar_header_t) == TAR_BLOCK_SIZE ? 1 : -1];
+};
+
+
+
 /* Info struct unpackers can fill out to inform users of thing like
  * timestamps of unpacked files */
 typedef struct unpack_info_t {
diff --git a/include/usage.src.h b/include/usage.src.h
index f30edbc..f84bb93 100644
--- a/include/usage.src.h
+++ b/include/usage.src.h
@@ -4273,54 +4273,6 @@ INSERT
 #define tac_full_usage "\n\n" \
 	"Concatenate FILEs and print them in reverse"
 
-#define tar_trivial_usage \
-       "-[" IF_FEATURE_TAR_CREATE("c") "xt" IF_FEATURE_SEAMLESS_GZ("z") \
-	IF_FEATURE_SEAMLESS_BZ2("j") IF_FEATURE_SEAMLESS_LZMA("a") \
-	IF_FEATURE_SEAMLESS_Z("Z") IF_FEATURE_TAR_NOPRESERVE_TIME("m") "vO] " \
-	IF_FEATURE_TAR_FROM("[-X FILE] ") \
-       "[-f TARFILE] [-C DIR] [FILE]..."
-#define tar_full_usage "\n\n" \
-	IF_FEATURE_TAR_CREATE("Create, extract, ") \
-	IF_NOT_FEATURE_TAR_CREATE("Extract ") \
-       "or list files from a tar file\n" \
-     "\nOptions:" \
-	IF_FEATURE_TAR_CREATE( \
-     "\n	c	Create" \
-	) \
-     "\n	x	Extract" \
-     "\n	t	List" \
-     "\nArchive format selection:" \
-	IF_FEATURE_SEAMLESS_GZ( \
-     "\n	z	Filter the archive through gzip" \
-	) \
-	IF_FEATURE_SEAMLESS_BZ2( \
-     "\n	j	Filter the archive through bzip2" \
-	) \
-	IF_FEATURE_SEAMLESS_LZMA( \
-     "\n	a	Filter the archive through lzma" \
-	) \
-	IF_FEATURE_SEAMLESS_Z( \
-     "\n	Z	Filter the archive through compress" \
-	) \
-	IF_FEATURE_TAR_NOPRESERVE_TIME( \
-     "\n	m	Do not restore mtime" \
-	) \
-     "\nFile selection:" \
-     "\n	f	Name of TARFILE or \"-\" for stdin" \
-     "\n	O	Extract to stdout" \
-	IF_FEATURE_TAR_FROM( \
-	IF_FEATURE_TAR_LONG_OPTIONS( \
-     "\n	exclude	File to exclude" \
-	) \
-     "\n	X	File with names to exclude" \
-	) \
-     "\n	C	Change to DIR before operation" \
-     "\n	v	Verbose" \
-
-#define tar_example_usage \
-       "$ zcat /tmp/tarball.tar.gz | tar -xf -\n" \
-       "$ tar -cf /tmp/tarball.tar /usr/local\n"
-
 #define taskset_trivial_usage \
        "[-p] [MASK] [PID | PROG ARGS]"
 #define taskset_full_usage "\n\n" \