t4012: use 'printf' instead of 'dd' to generate a binary file

For some reason, 'echo X | dd bs=1k seek=1' creates a file with 2050 bytes
on Windows instead of the expected 1026 bytes, so that a test fails. Since
the actual contents of the file are irrelevant as long as there is at
least one zero byte so that the diff machinery recognizes it as binary,
use printf to generate it.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
config: fix several access(NULL) calls

When $HOME is unset, home_config_paths fails and returns NULL pointers
for user_config and xdg_config. Valgrind complains with Syscall param
access(pathname) points to unaddressable byte(s).

Don't call blindly access() on these variables, but test them for
NULL-ness before.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
fixup! config: fix several access(NULL) calls
submodules: don't stumble over symbolic links when cloning recursively

Since 69c3051 (submodules: refactor computation of relative gitdir path)
cloning a submodule recursively fails for nested submodules when a
symbolic link is part of the path to the work tree of the superproject.

This happens when module_clone() tries to find the relative paths between
the work tree and the git dir. When a symbolic link in current $PWD points
to a directory that is at a different level, then determining the number
of "../" needed to traverse to the superproject's work tree leads to a
wrong result.

As there is no portable way to say "pwd -P", use cd_to_toplevel to remove
the link from $PWD, which fixes this problem.

A test for this issue has been added to t7406.

Reported-by: Bob Halley <halley@play-bow.org>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'as/t4012-style-updates' into pu

# By Alexander Strasser (6) and Johannes Sixt (1)
* as/t4012-style-updates:
  t4012: use 'printf' instead of 'dd' to generate a binary file
  t4012: Re-indent test snippets
  t4012: Make --shortstat test more robust
  t4012: Break up pipe into serial redirections
  t4012: Actually quote the sed script
  t4012: Unquote git command fragment in test title
  t4012: modernize style for quoting
Merge branch 'mm/config-xdg' into pu

# By Junio C Hamano (1) and Matthieu Moy (1)
* mm/config-xdg:
  fixup! config: fix several access(NULL) calls
  config: fix several access(NULL) calls
Merge branch 'jl/maint-1.7.10-recurse-submodules-with-symlink' into pu

* jl/maint-1.7.10-recurse-submodules-with-symlink:
  submodules: don't stumble over symbolic links when cloning recursively

Conflicts:
	git-submodule.sh
date.c: Fix off by one error in object-header date parsing

It is perfectly OK for a valid decimal integer to begin with '9' but
116eb3a (parse_date(): allow ancient git-timestamp, 2012-02-02) did
not express the range correctly.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
t7003: add test to filter a branch with a commit at epoch

Running filter-branch on a history that has a commit with timestamp
at epoch used to fail, but it should have been fixed.  Add test to
make sure it won't break again.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'jc/maint-filter-branch-epoch-date' into pu

* jc/maint-filter-branch-epoch-date:
  t7003: add test to filter a branch with a commit at epoch
  date.c: Fix off by one error in object-header date parsing

Conflicts:
	t/test-lib.sh

	The function that needed to be updated was moved to
	test-lib-functions since the topic forked, so applied the
	change manually to test_commit there.