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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-12-14 23:12:40 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-12-16 00:30:33 -0500
commit1a7f1b385cd9de8a0da934fadc379860f914ef33 (patch)
tree06ff69134de3f57f875679e4fa418497a98a808d /src/shared
parent6a057a99854268afe19738022205416bd5a0f4b5 (diff)
Move dropin listing to shared
No functional change. This is in preparation for using this in systemctl in the future.
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/dropin.c136
-rw-r--r--src/shared/dropin.h29
2 files changed, 165 insertions, 0 deletions
diff --git a/src/shared/dropin.c b/src/shared/dropin.c
index c5c4f95719..40e6fee1c4 100644
--- a/src/shared/dropin.c
+++ b/src/shared/dropin.c
@@ -21,8 +21,10 @@
#include "dropin.h"
#include "util.h"
+#include "strv.h"
#include "mkdir.h"
#include "fileio-label.h"
+#include "conf-files.h"
int drop_in_file(const char *dir, const char *unit, unsigned level,
const char *name, char **_p, char **_q) {
@@ -100,3 +102,137 @@ int write_drop_in_format(const char *dir, const char *unit, unsigned level,
return write_drop_in(dir, unit, level, name, p);
}
+
+static int iterate_dir(
+ const char *path,
+ UnitDependency dependency,
+ dependency_consumer_t consumer,
+ void *arg,
+ char ***strv) {
+
+ _cleanup_closedir_ DIR *d = NULL;
+ int r;
+
+ 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;
+ }
+
+ assert(consumer);
+
+ d = opendir(path);
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_error_errno(errno, "Failed to open directory %s: %m", path);
+ return -errno;
+ }
+
+ for (;;) {
+ struct dirent *de;
+ _cleanup_free_ char *f = NULL;
+
+ errno = 0;
+ de = readdir(d);
+ if (!de && errno != 0)
+ return log_error_errno(errno, "Failed to read directory %s: %m", path);
+
+ if (!de)
+ break;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ f = strjoin(path, "/", de->d_name, NULL);
+ if (!f)
+ return log_oom();
+
+ r = consumer(dependency, de->d_name, f, arg);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int unit_file_process_dir(
+ Set * unit_path_cache,
+ const char *unit_path,
+ const char *name,
+ const char *suffix,
+ UnitDependency dependency,
+ dependency_consumer_t consumer,
+ void *arg,
+ char ***strv) {
+
+ _cleanup_free_ char *path = NULL;
+
+ assert(unit_path);
+ assert(name);
+ assert(suffix);
+
+ path = strjoin(unit_path, "/", name, suffix, NULL);
+ if (!path)
+ return log_oom();
+
+ if (!unit_path_cache || set_get(unit_path_cache, path))
+ iterate_dir(path, dependency, consumer, arg, strv);
+
+ if (unit_name_is_instance(name)) {
+ _cleanup_free_ char *template = NULL, *p = NULL;
+ /* Also try the template dir */
+
+ template = unit_name_template(name);
+ if (!template)
+ return log_oom();
+
+ p = strjoin(unit_path, "/", template, suffix, NULL);
+ if (!p)
+ return log_oom();
+
+ if (!unit_path_cache || set_get(unit_path_cache, p))
+ iterate_dir(p, dependency, consumer, arg, strv);
+ }
+
+ return 0;
+}
+
+int unit_file_find_dropin_paths(
+ char **lookup_path,
+ Set *unit_path_cache,
+ Set *names,
+ char ***paths) {
+
+ _cleanup_strv_free_ char **strv = NULL, **ans = NULL;
+ Iterator i;
+ char *t;
+ int r;
+
+ assert(paths);
+
+ SET_FOREACH(t, names, i) {
+ char **p;
+
+ STRV_FOREACH(p, lookup_path)
+ unit_file_process_dir(unit_path_cache, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, NULL, NULL, &strv);
+ }
+
+ if (strv_isempty(strv))
+ return 0;
+
+ r = conf_files_list_strv(&ans, ".conf", NULL, (const char**) strv);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to get list of configuration files: %m");
+
+ *paths = ans;
+ ans = NULL;
+ return 1;
+}
diff --git a/src/shared/dropin.h b/src/shared/dropin.h
index 9c9742d0e4..d4531fca2d 100644
--- a/src/shared/dropin.h
+++ b/src/shared/dropin.h
@@ -22,6 +22,8 @@
***/
#include "macro.h"
+#include "set.h"
+#include "unit-name.h"
int drop_in_file(const char *dir, const char *unit, unsigned level,
const char *name, char **_p, char **_q);
@@ -31,3 +33,30 @@ int write_drop_in(const char *dir, const char *unit, unsigned level,
int write_drop_in_format(const char *dir, const char *unit, unsigned level,
const char *name, const char *format, ...) _printf_(5, 6);
+
+/**
+ * This callback will be called for each directory entry @entry,
+ * with @filepath being the full path to the entry.
+ *
+ * If return value is negative, loop will be aborted.
+ */
+typedef int (*dependency_consumer_t)(UnitDependency dependency,
+ const char *entry,
+ const char* filepath,
+ void *arg);
+
+int unit_file_process_dir(
+ Set * unit_path_cache,
+ const char *unit_path,
+ const char *name,
+ const char *suffix,
+ UnitDependency dependency,
+ dependency_consumer_t consumer,
+ void *arg,
+ char ***strv);
+
+int unit_file_find_dropin_paths(
+ char **lookup_path,
+ Set *unit_path_cache,
+ Set *names,
+ char ***paths);