From 8d8bc409a61708072054b6f718fd153b5fc78ed2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=96=87=E8=96=87=E5=AE=89?= <vivian@192.168.3.101>
Date: Wed, 21 Jan 2026 17:11:13 +0800
Subject: [PATCH] a

---
 backend/api/routes/accounts.py    | 31 +++++++++++++++++++++++++++++--
 backend/api/supervisor_account.py | 16 ++++++++++++++++
 2 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/backend/api/routes/accounts.py b/backend/api/routes/accounts.py
index cdb4b26..f85bc2c 100644
--- a/backend/api/routes/accounts.py
+++ b/backend/api/routes/accounts.py
@@ -19,6 +19,7 @@ from api.supervisor_account import (
     run_supervisorctl,
     parse_supervisor_status,
     program_name_for_account,
+    tail_supervisor,
 )
 
 logger = logging.getLogger(__name__)
@@ -227,7 +228,20 @@ async def trading_start_for_account(account_id: int, user: Dict[str, Any] = Depe
         running, pid, state = parse_supervisor_status(raw)
         return {"message": "已启动", "output": out, "status": {"program": program, "running": running, "pid": pid, "state": state, "raw": raw}}
     except Exception as e:
-        raise HTTPException(status_code=500, detail=f"启动交易进程失败: {e}")
+        tail = ""
+        try:
+            tail = tail_supervisor(program, "stderr", 120)
+        except Exception:
+            tail = ""
+        raise HTTPException(
+            status_code=500,
+            detail={
+                "error": f"启动交易进程失败: {e}",
+                "program": program,
+                "hint": "如果是 spawn error，重点看 stderr_tail（常见：python 路径不可执行/依赖缺失/权限/工作目录不存在）",
+                "stderr_tail": tail,
+            },
+        )
 
 
 @router.post("/{account_id}/trading/stop")
@@ -253,5 +267,18 @@ async def trading_restart_for_account(account_id: int, user: Dict[str, Any] = De
         running, pid, state = parse_supervisor_status(raw)
         return {"message": "已重启", "output": out, "status": {"program": program, "running": running, "pid": pid, "state": state, "raw": raw}}
     except Exception as e:
-        raise HTTPException(status_code=500, detail=f"重启交易进程失败: {e}")
+        tail = ""
+        try:
+            tail = tail_supervisor(program, "stderr", 120)
+        except Exception:
+            tail = ""
+        raise HTTPException(
+            status_code=500,
+            detail={
+                "error": f"重启交易进程失败: {e}",
+                "program": program,
+                "hint": "如果是 spawn error，重点看 stderr_tail（常见：python 路径不可执行/依赖缺失/权限/工作目录不存在）",
+                "stderr_tail": tail,
+            },
+        )
 
diff --git a/backend/api/supervisor_account.py b/backend/api/supervisor_account.py
index 1ea3993..1b23641 100644
--- a/backend/api/supervisor_account.py
+++ b/backend/api/supervisor_account.py
@@ -256,6 +256,22 @@ def parse_supervisor_status(raw: str) -> Tuple[bool, Optional[int], str]:
     return False, None, "UNKNOWN"
 
 
+def tail_supervisor(program: str, stream: str = "stderr", lines: int = 120) -> str:
+    """
+    读取 supervisor 进程最近日志（stdout/stderr）。
+    supervisorctl tail -<n> <program> [stdout|stderr]
+    """
+    s = (stream or "stderr").strip().lower()
+    if s not in {"stdout", "stderr"}:
+        s = "stderr"
+    n = int(lines or 120)
+    if n < 20:
+        n = 20
+    if n > 500:
+        n = 500
+    return run_supervisorctl(["tail", f"-{n}", str(program), s])
+
+
 @dataclass
 class EnsureProgramResult:
     ok: bool