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Diff reduction against bsdtar 2.8.3

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This commit is contained in:
kientzle 2010-04-11 16:28:10 +00:00
parent eec8ea9ab0
commit dec738d25d
1 changed files with 25 additions and 11 deletions
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36
usr.bin/tar/tree.h
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@ -53,16 +53,17 @@ void tree_close(struct tree *);
/*
* tree_next() returns Zero if there is no next entry, non-zero if
* there is. Note that directories are potentially visited three
* times. Directories are always visited first as part of enumerating
* their parent. If tree_descend() is invoked at that time, the
* directory is added to a work list and will subsequently be visited
* two more times: once just after descending into the directory and
* again just after ascending back to the parent.
* there is. Note that directories are visited three times.
* Directories are always visited first as part of enumerating their
* parent; that is a "regular" visit. If tree_descend() is invoked at
* that time, the directory is added to a work list and will
* subsequently be visited two more times: once just after descending
* into the directory ("postdescent") and again just after ascending
* back to the parent ("postascent").
*
* TREE_ERROR_DIR is returned if the descent failed (because the
* directory couldn't be opened, for instance). This is returned
* instead of TREE_PREVISIT/TREE_POSTVISIT. TREE_ERROR_DIR is not a
* instead of TREE_POSTDESCENT/TREE_POSTASCENT. TREE_ERROR_DIR is not a
* fatal error, but it does imply that the relevant subtree won't be
* visited. TREE_ERROR_FATAL is returned for an error that left the
* traversal completely hosed. Right now, this is only returned for
@ -96,10 +97,23 @@ void tree_descend(struct tree *);
int tree_current_depth(struct tree *);
/*
* The current full pathname, length of the full pathname,
* and a name that can be used to access the file.
* Because tree does use chdir extensively, the access path is
* almost never the same as the full current path.
* The current full pathname, length of the full pathname, and a name
* that can be used to access the file. Because tree does use chdir
* extensively, the access path is almost never the same as the full
* current path.
*
* TODO: Flesh out this interface to provide other information. In
* particular, Windows can provide file size, mode, and some permission
* information without invoking stat() at all.
*
* TODO: On platforms that support it, use openat()-style operations
* to eliminate the chdir() operations entirely while still supporting
* arbitrarily deep traversals. This makes access_path troublesome to
* support, of course, which means we'll need a rich enough interface
* that clients can function without it. (In particular, we'll need
* tree_current_open() that returns an open file descriptor.)
*
* TODO: Provide tree_current_archive_entry().
*/
const char *tree_current_path(struct tree *);
size_t tree_current_pathlen(struct tree *);