feat: add OpenRC (Gentoo) + svcmgr check (Linux) (#927)

Co-authored-by: AAGaming <aagaming@riseup.net>

1 files changed, 68 insertions, 9 deletions

diff --git a/backend/decky_loader/localplatform/localplatformlinux.py b/backend/decky_loader/localplatform/localplatformlinux.py
index 21993e4c..2d153e68 100644
--- a/backend/decky_loader/localplatform/localplatformlinux.py
+++ b/backend/decky_loader/localplatform/localplatformlinux.py
@@ -8,6 +8,25 @@ from ..enums import UserType
 
 logger = logging.getLogger("localplatform")
 
+def _get_service_manager() -> str:
+    try:
+        if isinstance(os.getenv("LINUX_SERVICE_MANAGER"), str): return os.getenv("LINUX_SERVICE_MANAGER") # pyright: ignore[reportReturnType]
+        link = os.path.realpath("/sbin/init")
+        if not link: raise Exception("This Linux installation doesn't have /sbin/init.")
+        service = os.path.basename(link)
+        match service:
+            case "openrc-init":
+                return "openrc"
+            case _:
+                if service != "init": return service
+                # Non-supervised or highly non-standard Linux installation
+                return "no_init"
+    except:
+        # As it's the most common, default to Systemd
+        return "systemd"
+
+service_manager = _get_service_manager()
+
 # subprocess._ENV
 ENV = Mapping[str, str]
 ProcessIO = int | IO[Any] | None
@@ -138,16 +157,36 @@ def setuid(user : UserType = UserType.HOST_USER):
         raise Exception("Unknown user type")
 
 async def service_active(service_name : str) -> bool:
-    res, _, _ = await run(["systemctl", "is-active", service_name], stdout=DEVNULL, stderr=DEVNULL)
+    match service_manager:
+        case "systemd":
+            cmd = ["systemctl", "is-active", service_name]
+        case "openrc":
+            cmd = ["rc-service"]
+            if _get_effective_user_id() != 0: cmd.append("--user")
+            cmd.append(service_name)
+            cmd.append("status")
+        case _:
+            return True # Stub unsupported services
+
+    res, _, _ = await run(cmd, stdout=DEVNULL, stderr=DEVNULL)
     return res.returncode == 0
 
 async def service_restart(service_name : str, block : bool = True) -> bool:
-    await run(["systemctl", "daemon-reload"])
-    logger.info("Systemd reload done.")
-    cmd = ["systemctl", "restart", service_name]
-
-    if not block:
-        cmd.append("--no-block")
+    match service_manager:
+        case "systemd":
+            await run(["systemctl", "daemon-reload"])
+            logger.info("Systemd reload done.")
+            cmd = ["systemctl", "restart", service_name]
+
+            if not block:
+                cmd.append("--no-block")
+        case "openrc":
+            cmd = ["rc-service"]
+            if _get_effective_user_id() != 0: cmd.append("--user")
+            cmd.append(service_name)
+            cmd.append("restart")
+        case _:
+            return True # Stub unsupported services
 
     res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0
@@ -157,7 +196,17 @@ async def service_stop(service_name : str) -> bool:
         # Service isn't running. pretend we stopped it
         return True
 
-    cmd = ["systemctl", "stop", service_name]
+    match service_manager:
+        case "systemd":
+            cmd = ["systemctl", "stop", service_name]
+        case "openrc":
+            cmd = ["rc-service"]
+            if _get_effective_user_id() != 0: cmd.append("--user")
+            cmd.append(service_name)
+            cmd.append("stop")
+        case _:
+            return True # Stub unsupported services
+
     res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0
 
@@ -166,7 +215,17 @@ async def service_start(service_name : str) -> bool:
         # Service is running. pretend we started it
         return True
 
-    cmd = ["systemctl", "start", service_name]
+    match service_manager:
+        case "systemd":
+            cmd = ["systemctl", "start", service_name]
+        case "openrc":
+            cmd = ["rc-service"]
+            if _get_effective_user_id() != 0: cmd.append("--user")
+            cmd.append(service_name)
+            cmd.append("start")
+        case _:
+            return True # Stub unsupported services
+
     res, _, _ = await run(cmd, stdout=PIPE, stderr=STDOUT)
     return res.returncode == 0