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From 31ce1352b687551d62d3b7d4dc1276b2dff1d65a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sun, 22 Dec 2013 22:53:23 -0500
Subject: [PATCH] delta: if prefix is specified, only show overrides there
systemd-delta /run/systemd/system will show all unit overrides
in /run, etc.
---
man/systemd-delta.xml | 80 +++++++++++++++++++++++++++++++++++++++++----------
src/delta/delta.c | 71 ++++++++++++++++++++++++++++-----------------
2 files changed, 109 insertions(+), 42 deletions(-)
diff --git a/man/systemd-delta.xml b/man/systemd-delta.xml
index 413ebd8..4d3ab78 100644
--- a/man/systemd-delta.xml
+++ b/man/systemd-delta.xml
@@ -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>
-
- <para>When no argument is specified a number of
- well-known subdirectories are searched for overridden
- files.</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>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>
diff --git a/src/delta/delta.c b/src/delta/delta.c
index e97f2e9..ae658f9 100644
--- a/src/delta/delta.c
+++ b/src/delta/delta.c
@@ -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;
}
@@ -594,15 +615,11 @@ 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)
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