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hermes - 💡(How to fix) Fix gateway restart kills new instance on non-systemd environments (Termux/Android)

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Root Cause

In _launch_detached_restart_command() (gateway/run.py), the Unix path uses:

subprocess.Popen([setsid_bin, "bash", "-lc", shell_cmd], start_new_session=True)

where shell_cmd = "while kill -0 $pid 2>/dev/null; sleep 0.2; done; hermes gateway restart".

bash -lc becomes the session leader. The watcher loop runs inside it. When the old gateway exits, bash finishes the -c command and exits — taking the newly launched gateway with it via SIGHUP. On systemd systems this is masked; on Termux/Android it fails deterministically.

Fix Action

Fix

Remove the intermediate bash subshell. Launch hermes gateway restart directly under setsid:

-        cmd = " ".join(shlex.quote(part) for part in hermes_cmd)
-        shell_cmd = (
-            f"while kill -0 {current_pid} 2>/dev/null; do sleep 0.2; done; "
-            f"{cmd} gateway restart"
-        )
+        if isinstance(hermes_cmd, list):
+            restart_parts = list(hermes_cmd) + ["gateway", "restart"]
+        else:
+            restart_parts = shlex.split(hermes_cmd) + ["gateway", "restart"]
         setsid_bin = shutil.which("setsid")
         if setsid_bin:
             subprocess.Popen(
-                [setsid_bin, "bash", "-lc", shell_cmd],
+                [setsid_bin, "--", *restart_parts],
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )
         else:
             subprocess.Popen(
-                ["bash", "-lc", shell_cmd],
+                restart_parts,
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )

Code Example

subprocess.Popen([setsid_bin, "bash", "-lc", shell_cmd], start_new_session=True)

---

-        cmd = " ".join(shlex.quote(part) for part in hermes_cmd)
-        shell_cmd = (
-            f"while kill -0 {current_pid} 2>/dev/null; do sleep 0.2; done; "
-            f"{cmd} gateway restart"
-        )
+        if isinstance(hermes_cmd, list):
+            restart_parts = list(hermes_cmd) + ["gateway", "restart"]
+        else:
+            restart_parts = shlex.split(hermes_cmd) + ["gateway", "restart"]
         setsid_bin = shutil.which("setsid")
         if setsid_bin:
             subprocess.Popen(
-                [setsid_bin, "bash", "-lc", shell_cmd],
+                [setsid_bin, "--", *restart_parts],
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )
         else:
             subprocess.Popen(
-                ["bash", "-lc", shell_cmd],
+                restart_parts,
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )
RAW_BUFFERClick to expand / collapse

Problem

When hermes gateway restart is triggered on Termux (no systemd), the new gateway instance dies immediately after launch, leaving the service completely down. QQ bot stays offline until someone manually restarts the gateway via TUI.

Root cause

In _launch_detached_restart_command() (gateway/run.py), the Unix path uses:

subprocess.Popen([setsid_bin, "bash", "-lc", shell_cmd], start_new_session=True)

where shell_cmd = "while kill -0 $pid 2>/dev/null; sleep 0.2; done; hermes gateway restart".

bash -lc becomes the session leader. The watcher loop runs inside it. When the old gateway exits, bash finishes the -c command and exits — taking the newly launched gateway with it via SIGHUP. On systemd systems this is masked; on Termux/Android it fails deterministically.

Fix

Remove the intermediate bash subshell. Launch hermes gateway restart directly under setsid:

-        cmd = " ".join(shlex.quote(part) for part in hermes_cmd)
-        shell_cmd = (
-            f"while kill -0 {current_pid} 2>/dev/null; do sleep 0.2; done; "
-            f"{cmd} gateway restart"
-        )
+        if isinstance(hermes_cmd, list):
+            restart_parts = list(hermes_cmd) + ["gateway", "restart"]
+        else:
+            restart_parts = shlex.split(hermes_cmd) + ["gateway", "restart"]
         setsid_bin = shutil.which("setsid")
         if setsid_bin:
             subprocess.Popen(
-                [setsid_bin, "bash", "-lc", shell_cmd],
+                [setsid_bin, "--", *restart_parts],
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )
         else:
             subprocess.Popen(
-                ["bash", "-lc", shell_cmd],
+                restart_parts,
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 start_new_session=True,
             )

Testing

Restarted via QQ /restart on Termux — new gateway survives and connects within seconds. QQ stays online.

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hermes - 💡(How to fix) Fix gateway restart kills new instance on non-systemd environments (Termux/Android)