unit: instead of directly loading drop-in configuration snippets use conf_files_list_strv()

This has the benefit of allowing the usual overriding/masking knowledge
everybody loves so much.

3 files changed, 57 insertions, 28 deletions

diff --git a/src/core/load-dropin.c b/src/core/load-dropin.c
index 8e10d8fb4c..d53e77f706 100644
--- a/src/core/load-dropin.c
+++ b/src/core/load-dropin.c
@@ -29,24 +29,25 @@
 #include "unit-name.h"
 #include "conf-parser.h"
 #include "load-fragment.h"
+#include "conf-files.h"
 
-static int load_dropin_config_file(Unit *u, const char *path) {
-        assert(u);
-        assert(path);
-
-        if (!endswith(path, ".conf"))
-                return 0;
-
-        return config_parse(path, NULL, UNIT_VTABLE(u)->sections, config_item_perf_lookup, (void*) load_fragment_gperf_lookup, false, u);
-}
-
-static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) {
+static int iterate_dir(Unit *u, const char *path, UnitDependency dependency, char ***strv) {
         _cleanup_closedir_ DIR *d = NULL;
         int r;
 
         assert(u);
         assert(path);
 
+        /* The config directories are special, since the order of the
+         * drop-ins matters */
+        if (dependency < 0)  {
+                r = strv_extend(strv, path);
+                if (r < 0)
+                        return log_oom();
+
+                return 0;
+        }
+
         d = opendir(path);
         if (!d) {
                 if (errno == ENOENT)
@@ -77,21 +78,15 @@ static int iterate_dir(Unit *u, const char *path, UnitDependency dependency) {
                 if (!f)
                         return log_oom();
 
-                if (dependency >= 0) {
-                        r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true);
-                        if (r < 0)
-                                log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r));
-                } else {
-                        r = load_dropin_config_file(u, f);
-                        if (r < 0)
-                                log_error("Cannot load drop-in configuration file %s for %s, ignoring: %s", f, u->id, strerror(-r));
-                }
+                r = unit_add_dependency_by_name(u, dependency, de->d_name, f, true);
+                if (r < 0)
+                        log_error("Cannot add dependency %s to %s, ignoring: %s", de->d_name, u->id, strerror(-r));
         }
 
         return 0;
 }
 
-static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency) {
+static int process_dir(Unit *u, const char *unit_path, const char *name, const char *suffix, UnitDependency dependency, char ***strv) {
         int r;
         char *path;
 
@@ -108,7 +103,7 @@ static int process_dir(Unit *u, const char *unit_path, const char *name, const c
             !set_get(u->manager->unit_path_cache, path))
                 r = 0;
         else
-                r = iterate_dir(u, path, dependency);
+                r = iterate_dir(u, path, dependency, strv);
         free(path);
 
         if (r < 0)
@@ -132,7 +127,7 @@ static int process_dir(Unit *u, const char *unit_path, const char *name, const c
                     !set_get(u->manager->unit_path_cache, path))
                         r = 0;
                 else
-                        r = iterate_dir(u, path, dependency);
+                        r = iterate_dir(u, path, dependency, strv);
                 free(path);
 
                 if (r < 0)
@@ -145,6 +140,9 @@ static int process_dir(Unit *u, const char *unit_path, const char *name, const c
 int unit_load_dropin(Unit *u) {
         Iterator i;
         char *t;
+        _cleanup_strv_free_ char **strv = NULL;
+        int r;
+
 
         assert(u);
 
@@ -154,22 +152,37 @@ int unit_load_dropin(Unit *u) {
                 char **p;
 
                 STRV_FOREACH(p, u->manager->lookup_paths.unit_path) {
-                        int r;
-
-                        r = process_dir(u, *p, t, ".wants", UNIT_WANTS);
+                        r = process_dir(u, *p, t, ".wants", UNIT_WANTS, NULL);
                         if (r < 0)
                                 return r;
 
-                        r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES);
+                        r = process_dir(u, *p, t, ".requires", UNIT_REQUIRES, NULL);
                         if (r < 0)
                                 return r;
 
                         /* This loads the drop-in config snippets */
-                        r = process_dir(u, *p, t, ".d", _UNIT_TYPE_INVALID);
+                        r = process_dir(u, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, &strv);
                         if (r < 0)
                                 return r;
                 }
         }
 
+        if (!strv_isempty(strv)) {
+                _cleanup_strv_free_ char **files = NULL, **f;
+
+                r = conf_files_list_strv(&files, ".conf", (const char**) strv);
+                if (r < 0) {
+                        log_error("Failed to get list of configuration files: %s", strerror(-r));
+                        return r;
+                }
+
+                STRV_FOREACH(f, files) {
+                        r = config_parse(*f, NULL, UNIT_VTABLE(u)->sections, config_item_perf_lookup, (void*) load_fragment_gperf_lookup, false, u);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+
         return 0;
 }
diff --git a/src/shared/strv.c b/src/shared/strv.c
index 6b76d0eaef..aed45d2612 100644
--- a/src/shared/strv.c
+++ b/src/shared/strv.c
@@ -370,6 +370,21 @@ fail:
         return NULL;
 }
 
+int strv_extend(char ***l, const char *value) {
+        char **c;
+
+        if (!value)
+                return 0;
+
+        c = strv_append(*l, value);
+        if (!c)
+                return -ENOMEM;
+
+        strv_free(*l);
+        *l = c;
+        return 0;
+}
+
 char **strv_uniq(char **l) {
         char **i;
 
diff --git a/src/shared/strv.h b/src/shared/strv.h
index 45558d8960..44ba3d1530 100644
--- a/src/shared/strv.h
+++ b/src/shared/strv.h
@@ -37,6 +37,7 @@ unsigned strv_length(char **l);
 char **strv_merge(char **a, char **b);
 char **strv_merge_concat(char **a, char **b, const char *suffix);
 char **strv_append(char **l, const char *s);
+int strv_extend(char ***l, const char *value);
 
 char **strv_remove(char **l, const char *s);
 char **strv_remove_prefix(char **l, const char *s);