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tmpfiles: clarify that "!" lines are filtered before collisions are checked 

Fixes: #15675
This commit is contained in:
Lennart Poettering 2020-05-10 11:45:52 +02:00
parent f742f9d317
commit ead2a4a231
1 changed files with 13 additions and 10 deletions
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23
man/tmpfiles.d.xml
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@ -121,16 +121,19 @@ A+ /path-or-glob/to/append/acls/recursively - - - - POSIX
<filename>/usr/lib/tmpfiles.d</filename> and <filename>/run/tmpfiles.d</filename>. Files in
<filename>/run/tmpfiles.d</filename> override files with the same name in
<filename>/usr/lib/tmpfiles.d</filename>. Packages should install their configuration files in
<filename>/usr/lib/tmpfiles.d</filename>. Files in <filename>/etc/tmpfiles.d</filename> are reserved for the local
administrator, who may use this logic to override the configuration files installed by vendor packages. All
configuration files are sorted by their filename in lexicographic order, regardless of which of the directories
they reside in. If multiple files specify the same path, the entry in the file with the lexicographically earliest
name will be applied. All other conflicting entries will be logged as errors. When two lines are prefix path and
suffix path of each other, then the prefix line is always created first, the suffix later (and if removal applies
to the line, the order is reversed: the suffix is removed first, the prefix later). Lines that take globs are
applied after those accepting no globs. If multiple operations shall be applied on the same file (such as ACL,
xattr, file attribute adjustments), these are always done in the same fixed order. Except for those cases, the
files/directories are processed in the order they are listed.</para>
<filename>/usr/lib/tmpfiles.d</filename>. Files in <filename>/etc/tmpfiles.d</filename> are reserved for
the local administrator, who may use this logic to override the configuration files installed by vendor
packages. All configuration files are sorted by their filename in lexicographic order, regardless of
which of the directories they reside in. If multiple files specify the same path, the entry in the file
with the lexicographically earliest name will be applied (note that lines suppressed due to the
<literal>!</literal> are filtered before application, meaning that if an early line carries the
exclamation mark and is suppressed because of that, a later line matching in path will be applied). All
other conflicting entries will be logged as errors. When two lines are prefix path and suffix path of
each other, then the prefix line is always created first, the suffix later (and if removal applies to the
line, the order is reversed: the suffix is removed first, the prefix later). Lines that take globs are
applied after those accepting no globs. If multiple operations shall be applied on the same file (such as
ACL, xattr, file attribute adjustments), these are always done in the same fixed order. Except for those
cases, the files/directories are processed in the order they are listed.</para>
<para>If the administrator wants to disable a configuration file
supplied by the vendor, the recommended way is to place a symlink