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| author | Paul Eggert <eggert@cs.ucla.edu> | 2007-06-15 22:47:16 +0200 |
|---|---|---|
| committer | Jim Meyering <jim@meyering.net> | 2007-06-15 22:47:16 +0200 |
| commit | cdec7e6e93db547a80525c24167345a090a00273 (patch) | |
| tree | ca98ab8f400d602f30f1642fb1ff8b57c9713b25 /NEWS | |
| parent | cad884a24545464cb42296834a8b5c02ee116379 (diff) | |
| download | coreutils-cdec7e6e93db547a80525c24167345a090a00273.tar.xz | |
Correct cp's handling of destination symlinks in some cases.
* NEWS: "cp" no longer considers a destination symlink to be the
same as the referenced file when copying links or making backups.
* src/copy.c (copy_reg): When following a symlink, use the
followed name in later chown etc. requests, so that the created
file is affected, rather than the symlink. Use O_NOFOLLOW on
source when not dereferencing symlinks; this avoids a race.
Preserve errno correctly when doing multiple open attempts on the
destination.
(copy_internal): Follow destination symlinks only when copying a
regular file and only when we don't intend to remove or rename the
destination first, regardless of whether following source
symlinks; this is because since POSIX and tradition (e.g.,
FreeBSD) say we should ordinarily follow destination symlinks if
the system calls would ordinarily do so.
* src/copy.h (struct cp_options): Add comment that 'dereference'
is only for source files.
* src/cp.c (usage): Note that --derereference etc. are only for
source files.
(make_dir_parents_private): Follow symlinks, regardless of whether
--dereference is specified, because these are destination symlinks.
* tests/cp/same-file: Adjust tests to match revised behavior.
Filter out perror output since it might vary from host to host.
Use sed alone instead of also using echo.
* doc/coreutils.texi (cp invocation): Document the behavior better when
the destination is a symlink. Clarify source versus destination
symlinks. Describe the new behavior for destination symlinks.
2007-06-15 Jim Meyering <jim@meyering.net>
* src/copy.c: Include "canonicalize.h".
(copy_reg): Use canonicalize_filename_mode to follow the symlink,
so that we can always open with O_EXCL and avoid a race.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -18,7 +18,12 @@ GNU coreutils NEWS -*- outline -*- ** Bug fixes cp no longer fails to write through a dangling symlink - [bug introduced in coreutils-6.7] + [bug introduced in coreutils-6.7]. Also, 'cp' no longer considers a + destination symlink to be the same as the referenced file when + copying links or making backups. For example, if SYM is a symlink + to FILE, "cp -l FILE SYM" now reports an error instead of silently + doing nothing. The behavior of 'cp' is now better documented when + the destination is a symlink. cut now diagnoses a range starting with zero (e.g., -f 0-2) as invalid; before, it would treat it as if it started with 1 (-f 1-2). |