kernel/git - git - PowerEL Git System

1926 Commits

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Commit Graph

Author	SHA1	Message	Date
Peter Hagervall	a7928f8ec7	[PATCH] Make some needlessly global stuff static Insert 'static' where appropriate. Signed-off-by: Peter Hagervall <hager@cs.umu.se> Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Junio C Hamano	152da3dfcf	Plug a small race in update-ref.c. Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago
Linus Torvalds	66bf85a462	[PATCH] Add "git-update-ref" to update the HEAD (or other) ref This is a careful version of the script stuff that currently just blindly writes HEAD with a new value. You can use git-update-ref HEAD <newhead> or git-update-ref HEAD <newhead> <oldhead> where the latter version verifies that the old value of HEAD matches oldhead. It basically allows a "ref" file to be a symbolic pointer to another ref file by starting with the four-byte header sequence of "ref:". More importantly, it allows the update of a ref file to follow these symbolic pointers, whether they are symlinks or these "regular file symbolic refs". NOTE! It follows _real_ symlinks only if they start with "refs/": otherwise it will just try to read them and update them as a regular file (ie it will allow the filesystem to follow them, but will overwrite such a symlink to somewhere else with a regular filename). In general, using git-update-ref HEAD "$head" should be a _lot_ safer than doing echo "$head" > "$GIT_DIR/HEAD" both from a symlink following standpoint _and_ an error checking standpoint. The "refs/" rule for symlinks means that symlinks that point to "outside" the tree are safe: they'll be followed for reading but not for writing (so we'll never write through a ref symlink to some other tree, if you have copied a whole archive by creating a symlink tree). Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>	19 years ago

Author

SHA1

Message

Date

Peter Hagervall

a7928f8ec7

[PATCH] Make some needlessly global stuff static

Insert 'static' where appropriate.

Signed-off-by: Peter Hagervall <hager@cs.umu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>

19 years ago

Junio C Hamano

152da3dfcf

Plug a small race in update-ref.c.

Signed-off-by: Junio C Hamano <junkio@cox.net>

19 years ago

Linus Torvalds

66bf85a462

[PATCH] Add "git-update-ref" to update the HEAD (or other) ref

This is a careful version of the script stuff that currently just
blindly writes HEAD with a new value.

You can use

	git-update-ref HEAD <newhead>

or

	git-update-ref HEAD <newhead> <oldhead>

where the latter version verifies that the old value of HEAD matches
oldhead.

It basically allows a "ref" file to be a symbolic pointer to another ref
file by starting with the four-byte header sequence of "ref:".

More importantly, it allows the update of a ref file to follow these
symbolic pointers, whether they are symlinks or these "regular file
symbolic refs".

NOTE! It follows _real_ symlinks only if they start with "refs/":
otherwise it will just try to read them and update them as a regular file
(ie it will allow the filesystem to follow them, but will overwrite such a
symlink to somewhere else with a regular filename).

In general, using

	git-update-ref HEAD "$head"

should be a _lot_ safer than doing

	echo "$head" > "$GIT_DIR/HEAD"

both from a symlink following standpoint _and_ an error checking
standpoint.  The "refs/" rule for symlinks means that symlinks that point
to "outside" the tree are safe: they'll be followed for reading but not
for writing (so we'll never write through a ref symlink to some other
tree, if you have copied a whole archive by creating a symlink tree).

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

19 years ago

3 Commits (a7928f8ec7fb3c368e6086ab48f41e33a22e1b94)