diff --git a/man/systemd-delta.xml b/man/systemd-delta.xml
index 413ebd8de8..4d3ab78040 100644
--- a/man/systemd-delta.xml
+++ b/man/systemd-delta.xml
@@ -49,7 +49,9 @@
- systemd-delta OPTIONS SUFFIX
+ systemd-delta
+ OPTIONS
+ PREFIX/SUFFIX|SUFFIX
@@ -57,18 +59,46 @@
Description
systemd-delta may be used to
- identify and compare configuration files in
- /etc that override default
- counterparts in /usr. The command
- line argument can be one or more name of a subdirectories of
- /etc or
- /usr/lib to compare, such as
- tmpfiles.d, sysctl.d or
- systemd/system.
+ identify and compare configuration files that override
+ other configuration files. Files in
+ /etc have highest priority, files
+ in /run have the second highest
+ priority, ..., files in /lib 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 .d
+ 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
+ systemd.unit5.
+
- When no argument is specified a number of
- well-known subdirectories are searched for overridden
- files.
+ 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 (/etc,
+ /run,
+ /usr/lib, ...). 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
+ tmpfiles.d,
+ sysctl.d or
+ systemd/system. 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.
@@ -168,9 +198,28 @@
-
+
+ Examples
+
+ To see all local configuration:
+ systemd-delta
+
+
+ To see all runtime configuration:
+ systemd-delta /run
+
+
+ To see all system unit configuration changes:
+ systemd-delta systemd/system
+
+
+ To see all runtime "drop-in" changes for system units:
+ systemd-delta --type=extended /run/systemd/system
+
+
+
Exit status
@@ -181,7 +230,8 @@
See Also
- systemd1
+ systemd1,
+ systemd.unit5
diff --git a/src/delta/delta.c b/src/delta/delta.c
index f049eb229a..19eaed3631 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;
}
@@ -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)