openrc: dynamic paths for user services

add two api functions, `rc_service_dir` and `rc_sysconf_dir`, both are
generate paths (and sub-paths) for resources, and meant to replace the
hardcoded variables like `RC_SVCDIR`.

those functions differ by dynamically switching between the system path,
or the user path, set in their home folder or runtime directory.

this lays out the intial support for user services.

Signed-off-by: Anna (navi) Figueiredo Gomes <navi@vlhl.dev>

1 files changed, 35 insertions, 6 deletions

diff --git a/src/librc/rc.h.in b/src/librc/rc.h.in
index 69d9d0e4..59fdfda3 100644
--- a/src/librc/rc.h.in
+++ b/src/librc/rc.h.in
@@ -34,18 +34,27 @@ extern "C" {
 #else
 #define RC_SVCDIR               RC_LIBEXECDIR "/init.d"
 #endif
-#define RC_RUNLEVELDIR          RC_SYSCONFDIR "/runlevels"
-#define RC_INITDIR              RC_SYSCONFDIR "/init.d"
-#define RC_CONFDIR              RC_SYSCONFDIR "/conf.d"
+
+#define RC_RUNLEVEL_SUBDIR      "runlevels"
+#define RC_INIT_SUBDIR          "init.d"
+#define RC_CONF_SUBDIR          "conf.d"
+#define RC_USER_SUBDIR          "user.d"
+
+#define RC_RUNLEVELDIR          RC_SYSCONFDIR "/" RC_RUNLEVEL_SUBDIR
+#define RC_INITDIR              RC_SYSCONFDIR "/" RC_INIT_SUBDIR
+#define RC_CONFDIR              RC_SYSCONFDIR "/" RC_CONF_SUBDIR
 #define RC_PLUGINDIR            RC_LIBDIR "/plugins"
 
+#define RC_CONF_FILE   "rc.conf"
+#define RC_CONF_D_SUBDIR "rc.conf.d"
+
 #define RC_INIT_FIFO RC_SVCDIR"/init.ctl"
 #define RC_PROFILE_ENV     RC_SYSCONFDIR "/profile.env"
 #define RC_SYS_WHITELIST   RC_LIBEXECDIR "/conf.d/env_whitelist"
 #define RC_USR_WHITELIST   RC_SYSCONFDIR "/conf.d/env_whitelist"
-#define RC_CONF         RC_SYSCONFDIR "/rc.conf"
-#define RC_CONF_D         RC_SYSCONFDIR "/rc.conf.d"
-#define RC_CONF_OLD     RC_SYSCONFDIR "/conf.d/rc"
+#define RC_CONF            RC_SYSCONFDIR "/" RC_CONF_FILE
+#define RC_CONF_D          RC_SYSCONFDIR "/" RC_CONF_D_SUBDIR
+#define RC_CONF_OLD        RC_SYSCONFDIR "/conf.d/rc"
 
 #define RC_PATH_PREFIX     RC_LIBEXECDIR "/bin:/bin:/sbin:/usr/bin:/usr/sbin"
 
@@ -123,6 +132,10 @@ typedef TAILQ_HEAD(rc_stringlist, rc_string) RC_STRINGLIST;
 #define RC_LEVEL_SINGLE     "single"
 #define RC_LEVEL_SHUTDOWN   "shutdown"
 
+/* !TODO: documentation */
+void rc_set_user(void);
+bool rc_is_user(void);
+
 /*! Return the current runlevel.
  * @return the current runlevel */
 char *rc_runlevel_get(void);
@@ -192,6 +205,22 @@ typedef enum
 	RC_SERVICE_CRASHED     = 0x1000,
 } RC_SERVICE;
 
+/*! Returns a path to the system configuration directory
+ * @return path string */
+const char *rc_sysconf_dir(void);
+
+/*! Returns a path to the current user's configuration directory
+ * @return path string */
+const char *rc_userconf_dir(void);
+
+/*! Returns a path to the runlevel directory, systemwide or for the current user
+ * @return path string */
+const char *rc_runlevel_dir(void);
+
+/*! Returns a path to the services directory, systemwide or for the current user
+ * @return path string */
+const char *rc_service_dir(void);
+
 /*! Add the service to the runlevel
  * @param runlevel to add to
  * @param service to add