tar: fix --numeric-owner, --no-same-owner, --no-same-permissions bits

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

7 files changed, 50 insertions, 45 deletions

diff --git a/archival/ar.c b/archival/ar.c
index dbff677..a1bcb1f 100644
--- a/archival/ar.c
+++ b/archival/ar.c
@@ -62,7 +62,7 @@ int ar_main(int argc, char **argv)
 		archive_handle->action_data = data_extract_all;
 	}
 	if (opt & AR_OPT_PRESERVE_DATE) {
-		archive_handle->ah_flags |= ARCHIVE_PRESERVE_DATE;
+		archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
 	}
 	if (opt & AR_OPT_VERBOSE) {
 		archive_handle->action_header = header_verbose_list_ar;
diff --git a/archival/cpio.c b/archival/cpio.c
index 5b4135f..bb57857 100644
--- a/archival/cpio.c
+++ b/archival/cpio.c
@@ -387,7 +387,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
 			archive_handle->action_data = data_extract_to_stdout;
 	}
 	if (opt & CPIO_OPT_UNCONDITIONAL) {
-		archive_handle->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
+		archive_handle->ah_flags |= ARCHIVE_UNLINK_OLD;
 		archive_handle->ah_flags &= ~ARCHIVE_EXTRACT_NEWER;
 	}
 	if (opt & CPIO_OPT_VERBOSE) {
@@ -405,7 +405,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
 		archive_handle->ah_flags |= ARCHIVE_CREATE_LEADING_DIRS;
 	}
 	if (opt & CPIO_OPT_PRESERVE_MTIME) {
-		archive_handle->ah_flags |= ARCHIVE_PRESERVE_DATE;
+		archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
 	}
 
 	while (*argv) {
diff --git a/archival/dpkg.c b/archival/dpkg.c
index 781f1bb..a9334df 100644
--- a/archival/dpkg.c
+++ b/archival/dpkg.c
@@ -1531,7 +1531,7 @@ static void unpack_package(deb_file_t *deb_file)
 	archive_handle->sub_archive->filter = filter_accept_list;
 	archive_handle->sub_archive->action_data = data_extract_all_prefix;
 	archive_handle->sub_archive->buffer = info_prefix;
-	archive_handle->sub_archive->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
+	archive_handle->sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
 	unpack_ar_archive(archive_handle);
 
 	/* Run the preinst prior to extracting */
@@ -1542,7 +1542,7 @@ static void unpack_package(deb_file_t *deb_file)
 	init_archive_deb_data(archive_handle);
 	archive_handle->sub_archive->action_data = data_extract_all_prefix;
 	archive_handle->sub_archive->buffer = (char*)"/"; /* huh? */
-	archive_handle->sub_archive->ah_flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
+	archive_handle->sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
 	unpack_ar_archive(archive_handle);
 
 	/* Create the list file */
diff --git a/archival/libunarchive/data_extract_all.c b/archival/libunarchive/data_extract_all.c
index d79ef7c..3e4a77d 100644
--- a/archival/libunarchive/data_extract_all.c
+++ b/archival/libunarchive/data_extract_all.c
@@ -18,14 +18,13 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		free(name);
 	}
 
-	/* Check if the file already exists */
-	if (archive_handle->ah_flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
+	if (archive_handle->ah_flags & ARCHIVE_UNLINK_OLD) {
 		/* Remove the entry if it exists */
 		if ((!S_ISDIR(file_header->mode))
 		 && (unlink(file_header->name) == -1)
 		 && (errno != ENOENT)
 		) {
-			bb_perror_msg_and_die("cannot remove old file %s",
+			bb_perror_msg_and_die("can't remove old file %s",
 					file_header->name);
 		}
 	}
@@ -34,7 +33,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		struct stat statbuf;
 		if (lstat(file_header->name, &statbuf) == -1) {
 			if (errno != ENOENT) {
-				bb_perror_msg_and_die("cannot stat old file");
+				bb_perror_msg_and_die("can't stat old file");
 			}
 		}
 		else if (statbuf.st_mtime <= file_header->mtime) {
@@ -46,7 +45,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 			return;
 		}
 		else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
-			bb_perror_msg_and_die("cannot remove old file %s",
+			bb_perror_msg_and_die("can't remove old file %s",
 					file_header->name);
 		}
 	}
@@ -59,7 +58,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		/* hard link */
 		res = link(file_header->link_target, file_header->name);
 		if ((res == -1) && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) {
-			bb_perror_msg("cannot create %slink "
+			bb_perror_msg("can't create %slink "
 					"from %s to %s", "hard",
 					file_header->name,
 					file_header->link_target);
@@ -69,8 +68,10 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		switch (file_header->mode & S_IFMT) {
 		case S_IFREG: {
 			/* Regular file */
-			dst_fd = xopen3(file_header->name, O_WRONLY | O_CREAT | O_EXCL,
-							file_header->mode);
+			dst_fd = xopen3(file_header->name,
+				O_WRONLY | O_CREAT | O_EXCL,
+				file_header->mode
+				);
 			bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);
 			close(dst_fd);
 			break;
@@ -82,7 +83,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 			 && (errno != EEXIST)
 			 && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
 			) {
-				bb_perror_msg("cannot make dir %s", file_header->name);
+				bb_perror_msg("can't make dir %s", file_header->name);
 			}
 			break;
 		case S_IFLNK:
@@ -91,7 +92,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 			if ((res == -1)
 			 && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
 			) {
-				bb_perror_msg("cannot create %slink "
+				bb_perror_msg("can't create %slink "
 					"from %s to %s", "sym",
 					file_header->name,
 					file_header->link_target);
@@ -105,7 +106,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 			if ((res == -1)
 			 && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)
 			) {
-				bb_perror_msg("cannot create node %s", file_header->name);
+				bb_perror_msg("can't create node %s", file_header->name);
 			}
 			break;
 		default:
@@ -113,7 +114,7 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		}
 	}
 
-	if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_OWN)) {
+	if (!(archive_handle->ah_flags & ARCHIVE_DONT_RESTORE_OWNER)) {
 #if ENABLE_FEATURE_TAR_UNAME_GNAME
 		if (!(archive_handle->ah_flags & ARCHIVE_NUMERIC_OWNER)) {
 			uid_t uid = file_header->uid;
@@ -136,11 +137,11 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
 		/* uclibc has no lchmod, glibc is even stranger -
 		 * it has lchmod which seems to do nothing!
 		 * so we use chmod... */
-		if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_PERM)) {
+		if (!(archive_handle->ah_flags & ARCHIVE_DONT_RESTORE_PERM)) {
 			chmod(file_header->name, file_header->mode);
 		}
 		/* same for utime */
-		if (archive_handle->ah_flags & ARCHIVE_PRESERVE_DATE) {
+		if (archive_handle->ah_flags & ARCHIVE_RESTORE_DATE) {
 			struct utimbuf t;
 			t.actime = t.modtime = file_header->mtime;
 			utime(file_header->name, &t);
diff --git a/archival/rpm.c b/archival/rpm.c
index 569bcdd..309b55a 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -202,12 +202,12 @@ static void extract_cpio_gz(int fd)
 	archive_handle->seek = seek_by_read;
 	//archive_handle->action_header = header_list;
 	archive_handle->action_data = data_extract_all;
-	archive_handle->ah_flags = ARCHIVE_PRESERVE_DATE | ARCHIVE_CREATE_LEADING_DIRS
+	archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 		/* compat: overwrite existing files.
 		 * try "rpm -i foo.src.rpm" few times in a row -
 		 * standard rpm will not complain.
 		 * (TODO? real rpm creates "file;1234" and then renames it) */
-		| ARCHIVE_EXTRACT_UNCONDITIONAL;
+		| ARCHIVE_UNLINK_OLD;
 	archive_handle->src_fd = fd;
 	/*archive_handle->offset = 0; - init_handle() did it */
 
diff --git a/archival/tar.c b/archival/tar.c
index 9b7a42a..bd8e5dc 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -735,10 +735,10 @@ enum {
 	IF_FEATURE_TAR_FROM(     OPTBIT_INCLUDE_FROM,)
 	IF_FEATURE_TAR_FROM(     OPTBIT_EXCLUDE_FROM,)
 	IF_FEATURE_SEAMLESS_GZ(  OPTBIT_GZIP        ,)
-	IF_FEATURE_SEAMLESS_Z(   OPTBIT_COMPRESS    ,)
-	OPTBIT_NOPRESERVE_OWN,
-	OPTBIT_NOPRESERVE_PERM,
+	IF_FEATURE_SEAMLESS_Z(   OPTBIT_COMPRESS    ,) /* 15th bit */
 	OPTBIT_NUMERIC_OWNER,
+	OPTBIT_NOPRESERVE_OWNER,
+	OPTBIT_NOPRESERVE_PERM,
 	OPT_TEST         = 1 << 0, // t
 	OPT_EXTRACT      = 1 << 1, // x
 	OPT_BASEDIR      = 1 << 2, // C
@@ -755,9 +755,9 @@ enum {
 	OPT_EXCLUDE_FROM = IF_FEATURE_TAR_FROM(     (1 << OPTBIT_EXCLUDE_FROM)) + 0, // X
 	OPT_GZIP         = IF_FEATURE_SEAMLESS_GZ(  (1 << OPTBIT_GZIP        )) + 0, // z
 	OPT_COMPRESS     = IF_FEATURE_SEAMLESS_Z(   (1 << OPTBIT_COMPRESS    )) + 0, // Z
-	OPT_NOPRESERVE_OWN  = 1 << OPTBIT_NOPRESERVE_OWN , // no-same-owner
-	OPT_NOPRESERVE_PERM = 1 << OPTBIT_NOPRESERVE_PERM, // no-same-permissions
 	OPT_NUMERIC_OWNER = 1 << OPTBIT_NUMERIC_OWNER,
+	OPT_NOPRESERVE_OWNER = 1 << OPTBIT_NOPRESERVE_OWNER , // no-same-owner
+	OPT_NOPRESERVE_PERM = 1 << OPTBIT_NOPRESERVE_PERM, // no-same-permissions
 };
 #if ENABLE_FEATURE_TAR_LONG_OPTIONS
 static const char tar_longopts[] ALIGN1 =
@@ -789,12 +789,15 @@ static const char tar_longopts[] ALIGN1 =
 # if ENABLE_FEATURE_SEAMLESS_Z
 	"compress\0"            No_argument       "Z"
 # endif
+	/* use numeric uid/gid from tar header, not textual */
 	"numeric-owner\0"       No_argument       "\xfc"
+	/* do not restore owner */
 	"no-same-owner\0"       No_argument       "\xfd"
+	/* do not restore mode */
 	"no-same-permissions\0" No_argument       "\xfe"
 	/* --exclude takes next bit position in option mask, */
 	/* therefore we have to either put it _after_ --no-same-perm */
-	/* or add OPT[BIT]_EXCLUDE before OPT[BIT]_NOPRESERVE_OWN */
+	/* or add OPT[BIT]_EXCLUDE before OPT[BIT]_NOPRESERVE_OWNER */
 # if ENABLE_FEATURE_TAR_FROM
 	"exclude\0"             Required_argument "\xff"
 # endif
@@ -817,12 +820,12 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 	/* Initialise default values */
 	tar_handle = init_handle();
 	tar_handle->ah_flags = ARCHIVE_CREATE_LEADING_DIRS
-	                     | ARCHIVE_PRESERVE_DATE
-	                     | ARCHIVE_EXTRACT_UNCONDITIONAL;
+	                     | ARCHIVE_RESTORE_DATE
+	                     | ARCHIVE_UNLINK_OLD;
 
 	/* Apparently only root's tar preserves perms (see bug 3844) */
 	if (getuid() != 0)
-		tar_handle->ah_flags |= ARCHIVE_NOPRESERVE_PERM;
+		tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
 
 	/* Prepend '-' to the first argument if required */
 	opt_complementary = "--:" // first arg is options
@@ -856,6 +859,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 		, &verboseFlag // combined count for -t and -v
 		, &verboseFlag // combined count for -t and -v
 		);
+	//bb_error_msg("opt:%08x", opt);
 	argv += optind;
 
 	if (verboseFlag) tar_handle->action_header = header_verbose_list;
@@ -868,17 +872,17 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 		tar_handle->action_data = data_extract_to_stdout;
 
 	if (opt & OPT_KEEP_OLD)
-		tar_handle->ah_flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
-
-	if (opt & OPT_NOPRESERVE_OWN)
-		tar_handle->ah_flags |= ARCHIVE_NOPRESERVE_OWN;
-
-	if (opt & OPT_NOPRESERVE_PERM)
-		tar_handle->ah_flags |= ARCHIVE_NOPRESERVE_PERM;
+		tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
 
 	if (opt & OPT_NUMERIC_OWNER)
 		tar_handle->ah_flags |= ARCHIVE_NUMERIC_OWNER;
 
+	if (opt & OPT_NOPRESERVE_OWNER)
+		tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_OWNER;
+
+	if (opt & OPT_NOPRESERVE_PERM)
+		tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
+
 	if (opt & OPT_GZIP)
 		get_header_ptr = get_header_tar_gz;
 
diff --git a/include/unarchive.h b/include/unarchive.h
index d8cb2a0..26d79e1 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -4,14 +4,14 @@
 
 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
 
-#define ARCHIVE_PRESERVE_DATE           1
-#define ARCHIVE_CREATE_LEADING_DIRS     2
-#define ARCHIVE_EXTRACT_UNCONDITIONAL   4
-#define ARCHIVE_EXTRACT_QUIET           8
-#define ARCHIVE_EXTRACT_NEWER           16
-#define ARCHIVE_NOPRESERVE_OWN          32
-#define ARCHIVE_NOPRESERVE_PERM         64
-#define ARCHIVE_NUMERIC_OWNER           128
+#define ARCHIVE_RESTORE_DATE        (1 << 0)
+#define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
+#define ARCHIVE_UNLINK_OLD          (1 << 2)
+#define ARCHIVE_EXTRACT_QUIET       (1 << 3)
+#define ARCHIVE_EXTRACT_NEWER       (1 << 4)
+#define ARCHIVE_DONT_RESTORE_OWNER  (1 << 5)
+#define ARCHIVE_DONT_RESTORE_PERM   (1 << 6)
+#define ARCHIVE_NUMERIC_OWNER       (1 << 7)
 
 typedef struct file_header_t {
 	char *name;