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20 .TH "GIT-FSCK-OBJECTS" 1 "" "" ""
22 git-fsck-objects \- Verifies the connectivity and validity of the objects in the database
26 git\-fsck\-objects [\-\-tags] [\-\-root] [\-\-unreachable] [\-\-cache]
27 [\-\-standalone | \-\-full] [\-\-strict] [<object>*]
33 Verifies the connectivity and validity of the objects in the database\&.
39 An object to treat as the head of an unreachability trace\&.
41 If no objects are given, git\-fsck\-objects defaults to using the index file and all SHA1 references in \&.git/refs/* as heads\&.
45 Print out objects that exist but that aren't readable from any of the reference nodes\&.
57 Consider any object recorded in the index also as a head node for an unreachability trace\&.
61 Limit checks to the contents of GIT_OBJECT_DIRECTORY ($GIT_DIR/objects), making sure that it is consistent and complete without referring to objects found in alternate object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES, nor packed git archives found in $GIT_DIR/objects/pack; cannot be used with \-\-full\&.
65 Check not just objects in GIT_OBJECT_DIRECTORY ($GIT_DIR/objects), but also the ones found in alternate object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES, and in packed git archives found in $GIT_DIR/objects/pack and corresponding pack subdirectories in alternate object pools; cannot be used with \-\-standalone\&.
69 Enable more strict checking, namely to catch a file mode recorded with g+w bit set, which was created by older versions of git\&. Existing repositories, including the Linux kernel, git itself, and sparse repository have old objects that triggers this check, but it is recommended to check new projects with this flag\&.
72 It tests SHA1 and general object sanity, and it does full tracking of the resulting reachability and everything else\&. It prints out any corruption it finds (missing or bad objects), and if you use the \-\-unreachable flag it will also print out objects that exist but that aren't readable from any of the specified head nodes\&.
78 git\-fsck\-objects \-\-unreachable HEAD $(cat \&.git/refs/heads/*)
82 will do quite a _lot_ of verification on the tree\&. There are a few extra validity tests to be added (make sure that tree objects are sorted properly etc), but on the whole if "git\-fsck\-objects" is happy, you do have a valid tree\&.
85 Any corrupt objects you will have to find in backups or other archives (ie you can just remove them and do an "rsync" with some other site in the hopes that somebody else has the object you have corrupted)\&.
88 Of course, "valid tree" doesn't mean that it wasn't generated by some evil person, and the end result might be crap\&. git is a revision tracking system, not a quality assurance system ;)
90 .SH "EXTRACTED DIAGNOSTICS"
93 expect dangling commits \- potential heads \- due to lack of head information
94 You haven't specified any nodes as heads so it won't be possible to differentiate between un\-parented commits and root nodes\&.
97 missing sha1 directory <dir>
98 The directory holding the sha1 objects is missing\&.
101 unreachable <type> <object>
102 The <type> object <object>, isn't actually referred to directly or indirectly in any of the trees or commits seen\&. This can mean that there's another root node that you're not specifying or that the tree is corrupt\&. If you haven't missed a root node then you might as well delete unreachable nodes since they can't be used\&.
105 missing <type> <object>
106 The <type> object <object>, is referred to but isn't present in the database\&.
109 dangling <type> <object>
110 The <type> object <object>, is present in the database but never directly used\&. A dangling commit could be a root node\&.
113 warning: git\-fsck\-objects: tree <tree> has full pathnames in it
117 sha1 mismatch <object>
118 The database has an object who's sha1 doesn't match the database value\&. This indicates a serious data integrity problem\&.
120 .SH "ENVIRONMENT VARIABLES"
124 used to specify the object database root (usually $GIT_DIR/objects)
128 used to specify the index file of the index
131 GIT_ALTERNATE_OBJECT_DIRECTORIES
132 used to specify additional object database roots (usually unset)
137 Written by Linus Torvalds <torvalds@osdl\&.org>
142 Documentation by David Greaves, Junio C Hamano and the git\-list <git@vger\&.kernel\&.org>\&.
147 Part of the \fBgit\fR(7) suite