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path_resolution.7: Improve description of trailin slashes 

See https://bugzilla.kernel.org/show_bug.cgi?id=212385

some/path/dir/ is not always the same as some/path/dir/:

$ mkdir u
$ rmdir u/.
rmdir: failed to remove 'u/.': Invalid argument
$ rmdir u
$

The text in POSIX.1-2018 Section 4.13 ("Pathname Resolution")
is helpful in pointing to a better wording.

Reported-by: Askar Safin <safinaskar@mail.ru>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2021-08-09 01:02:18 +02:00
parent 06501029e1
commit 9b6cce9936
1 changed files with 4 additions and 3 deletions
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7
man7/path_resolution.7
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@ -177,10 +177,11 @@ with the
flag set (though note that this also restricts bind mount traversal).
.SS Trailing slashes
If a pathname ends in a \(aq/\(aq, that forces resolution of the preceding
component as in Step 2: it has to exist and resolve to a directory.
component as in Step 2:
the component preceding the slash either exists and resolves to a directory
of it names a directory that is to be created immediately after the
pathname is resolved.
Otherwise, a trailing \(aq/\(aq is ignored.
(Or, equivalently, a pathname with a trailing \(aq/\(aq is equivalent to
the pathname obtained by appending \(aq.\(aq to it.)
.SS Final symlink
If the last component of a pathname is a symbolic link, then it
depends on the system call whether the file referred to will be