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delta: if prefix is specified, only show overrides there

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systemd-delta /run/systemd/system will show all unit overrides
in /run, etc.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2013-12-22 22:53:23 -05:00
parent f939e9a47c
commit 6096dfd616
2 changed files with 108 additions and 41 deletions
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78
man/systemd-delta.xml
View File

@ -49,7 +49,9 @@
<refsynopsisdiv>
<cmdsynopsis>
<command>systemd-delta <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="opt" rep="repeat">SUFFIX</arg></command>
<command>systemd-delta</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="opt" rep="repeat"><replaceable>PREFIX</replaceable><optional>/<replaceable>SUFFIX</replaceable></optional>|<replaceable>SUFFIX</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
@ -57,18 +59,46 @@
<title>Description</title>
<para><command>systemd-delta</command> may be used to
identify and compare configuration files in
<filename>/etc</filename> that override default
counterparts in <filename>/usr</filename>. The command
line argument can be one or more name of a subdirectories of
<filename>/etc</filename> or
<filename>/usr/lib</filename> to compare, such as
<filename>tmpfiles.d</filename>, <filename>sysctl.d</filename> or
<filename>systemd/system</filename>.</para>
identify and compare configuration files that override
other configuration files. Files in
<filename>/etc</filename> have highest priority, files
in <filename>/run</filename> have the second highest
priority, ..., files in <filename>/lib</filename> have
lowest priority. Files in a directory with higher
priority override files with the same name in
directories of lower priority. In addition, certain
configuration files can have <literal>.d</literal>
directories which contain "drop-in" files with
configuration snippets which augment the main
configuration file. "Drop-in" files can be overriden
in the same way by placing files with the same name in
a directory of higher priority (except that in case of
"drop-in" files, both the "drop-in" file name and the
name of the containing directory, which corresponds to
the name of the main configuration file, must match).
For a fuller explanation, see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
</para>
<para>When no argument is specified a number of
well-known subdirectories are searched for overridden
files.</para>
<para>The command line argument will be split into a
prefix and a suffix. Either is optional. The prefix
must be one of the directories containing
configuration files (<filename>/etc</filename>,
<filename>/run</filename>,
<filename>/usr/lib</filename>, ...). If it is given,
only overriding files contained in this directory will
be shown. Otherwise, all overriding files will be
shown. The suffix must be a name of a subdirectory
containing configuration files like
<filename>tmpfiles.d</filename>,
<filename>sysctl.d</filename> or
<filename>systemd/system</filename>. If it is given,
only configuration files in this subdirectory (across
all configuration paths) will be analyzed. Otherwise,
all configuration files will be analyzed. If the
commandline argument is not given at all, all
configuration files will be analyzed. See below for
some examples.</para>
</refsect1>
<refsect1>
@ -168,9 +198,28 @@
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>To see all local configuration:</para>
<programlisting>systemd-delta
</programlisting>
<para>To see all runtime configuration:</para>
<programlisting>systemd-delta /run
</programlisting>
<para>To see all system unit configuration changes:</para>
<programlisting>systemd-delta systemd/system
</programlisting>
<para>To see all runtime "drop-in" changes for system units:</para>
<programlisting>systemd-delta --type=extended /run/systemd/system
</programlisting>
</refsect1>
<refsect1>
<title>Exit status</title>
@ -181,7 +230,8 @@
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>

71
src/delta/delta.c
View File

@ -4,6 +4,7 @@
This file is part of systemd.
Copyright 2012 Lennart Poettering
Copyright 2013 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
@ -346,7 +347,7 @@ static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const ch
}
}
static int process_suffix(const char *suffix) {
static int process_suffix(const char *suffix, const char *onlyprefix) {
const char *p;
char *f;
Hashmap *top, *bottom, *drops;
@ -391,20 +392,23 @@ static int process_suffix(const char *suffix) {
o = hashmap_get(bottom, key);
assert(o);
if (path_equal(o, f))
notify_override_unchanged(f);
else {
k = found_override(f, o);
if (k < 0)
r = k;
else
n_found += k;
if (!onlyprefix || startswith(o, onlyprefix)) {
if (path_equal(o, f)) {
notify_override_unchanged(f);
} else {
k = found_override(f, o);
if (k < 0)
r = k;
else
n_found += k;
}
}
h = hashmap_get(drops, key);
if (h)
HASHMAP_FOREACH(o, h, j)
n_found += notify_override_extended(f, o);
if (!onlyprefix || startswith(o, onlyprefix))
n_found += notify_override_extended(f, o);
}
finish:
@ -423,24 +427,41 @@ finish:
return r < 0 ? r : n_found;
}
static int process_suffix_chop(const char *suffix) {
static int process_suffixes(const char *onlyprefix) {
const char *n;
int n_found = 0, r;
NULSTR_FOREACH(n, suffixes) {
r = process_suffix(n, onlyprefix);
if (r < 0)
return r;
else
n_found += r;
}
return n_found;
}
static int process_suffix_chop(const char *arg) {
const char *p;
assert(suffix);
assert(arg);
if (!path_is_absolute(suffix))
return process_suffix(suffix);
if (!path_is_absolute(arg))
return process_suffix(arg, NULL);
/* Strip prefix from the suffix */
NULSTR_FOREACH(p, prefixes) {
if (startswith(suffix, p)) {
suffix += strlen(p);
const char *suffix = startswith(arg, p);
if (suffix) {
suffix += strspn(suffix, "/");
return process_suffix(suffix);
if (*suffix)
return process_suffix(suffix, NULL);
else
return process_suffixes(arg);
}
}
log_error("Invalid suffix specification %s.", suffix);
log_error("Invalid suffix specification %s.", arg);
return -EINVAL;
}
@ -595,15 +616,11 @@ int main(int argc, char *argv[]) {
}
} else {
const char *n;
NULSTR_FOREACH(n, suffixes) {
k = process_suffix(n);
if (k < 0)
r = k;
else
n_found += k;
}
k = process_suffixes(NULL);
if (k < 0)
r = k;
else
n_found += k;
}
if (r >= 0)