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Update to latest gnulib with new copyright year.
Run "make update-copyright" and then...
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Manually update copyright year,
until we fully sync with gnulib at a later stage.
* tests/sample-test: Adjust to use the single most recent year.
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Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* tests/sample-test: Adjust to use the single most recent year.
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Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* tests/sample-test: Adjust to use the single most recent year.
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Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* tests/sample-test: Adjust to use the single most recent year.
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Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* tests/sample-test: Adjust to use the single most recent year.
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Previously, 'ln A B' did 'stat("B"), lstat("A"), link("A","B")'
where the stat and lstat were necessary to avoid hard-linking
directories on systems that can hard-link directories.
Now, in situations that prohibit hard links to directories,
'ln A B' merely does 'link("A","B")'. The new behavior
avoids some races and should be more efficient.
This patch was inspired by Bug#10020, which was about 'ln'.
* bootstrap.conf (gnulib_modules): Add unlinkdir.
* src/force-link.c (force_linkat, force_symlinkat): New arg for
error number of previous try. Return error number, 0, or -1 if
error, success, or success after removal. All callers changed.
* src/ln.c: Include priv-set.h, unlinkdir.h.
(beware_hard_dir_link): New static var.
(errnoize, atomic_link): New functions.
(target_directory_operand): Use errnoize for simplicity.
(do_link): New arg for error number of previous try. All callers
changed. Do each link atomically if possible.
(main): Do -r check earlier. Remove linkdir privileges so we can
use a single linkat/symlinkat instead of a racy substitute for the
common case of 'ln A B' and 'ln -s A B'. Set beware_hard_dir_link
to disable this optimization.
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Run "make update-copyright" and then...
* gnulib: Update to latest with copyright year adjusted.
* tests/init.sh: Sync with gnulib to pick up copyright year.
* bootstrap: Likewise.
* tests/sample-test: Adjust to use the single most recent year.
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* src/force-link.h: Don't include headers already included by system.h
* src/force-link.c: Likewise. Also include system.h and
explicitly mark extern functions as such.
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If the file B already exists, commands like 'ln -f A B' and
'cp -fl A B' no longer remove B before creating the new link.
Instead, they arrange for the new link to replace B atomically.
This should fix a race condition reported by Mike Crowe (Bug#25680).
* NEWS, doc/coreutils.texi (cp invocation, ln invocation):
Document this.
* bootstrap.conf (gnulib_modules): Add symlinkat.
* src/copy.c, src/ln.c: Include force-link.h.
* src/copy.c (same_file_ok): It's also OK to remove a destination
symlink when creating symbolic links, or when the source and
destination are on the same file system and when creating hard links.
* src/copy.c (create_hard_link, copy_internal):
* src/ln.c (do_link):
Rewrite using force_linkat and force_symlinkat, to close a window
where the destination temporarily does not exist.
* src/cp.c (main): Do not set x.unlink_dest_before_opening
merely because we are in link-creation mode.
* src/force-link.c, src/force-link.h: New files.
* src/local.mk (copy_sources, src_ln_SOURCES): Add them.
* tests/cp/same-file.sh: Adjust test case to match fixed behavior.
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