Distriction specific patch, not going upstream

Disable systemd-run if the command is not found.

diff --git a/xpra/scripts/main.py b/xpra/scripts/main.py
index 1c5e8ddaad..084aabe792 100755
--- a/xpra/scripts/main.py
+++ b/xpra/scripts/main.py
@@ -396,23 +396,26 @@ def use_systemd_run(s) -> bool:
     cmd = ["systemd-run", "--quiet"]
     if getuid() != 0:
         cmd += ["--user"]
-    cmd += ["--scope", "--", "true"]
-    proc = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=False)
     try:
-        proc.communicate(timeout=2)
-        r = proc.returncode
-    except TimeoutExpired:  # pragma: no cover
-        r = None
-    if r is None:
-        try:
-            proc.terminate()
-        except Exception:
-            pass
+        cmd = ["systemd-run", "--quiet", "--user", "--scope", "--", "true"]
+        proc = Popen(cmd, stdout=PIPE, stderr=PIPE, shell=False)
         try:
-            proc.communicate(timeout=1)
+            proc.communicate(timeout=2)
+            r = proc.returncode
         except TimeoutExpired:  # pragma: no cover
             r = None
-    return r == 0
+        if r is None:
+            try:
+                proc.terminate()
+            except Exception:
+                pass
+            try:
+                proc.communicate(timeout=1)
+            except TimeoutExpired:  # pragma: no cover
+                r = None
+        return r==0
+    except FileNotFoundError:
+        return False


 def verify_gir():
e/store-api.cc?id=a2a3264bb38568e892e69e64dcfd12829a9975ce'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/libstore/store-api.cc'>
<input type='hidden' name='id' value='a2a3264bb38568e892e69e64dcfd12829a9975ce'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=a2a3264bb38568e892e69e64dcfd12829a9975ce'>root</a>/<a href='/guix/log/nix?id=a2a3264bb38568e892e69e64dcfd12829a9975ce'>nix</a>/<a href='/guix/log/nix/libstore?id=a2a3264bb38568e892e69e64dcfd12829a9975ce'>libstore</a>/<a href='/guix/log/nix/libstore/store-api.cc?id=a2a3264bb38568e892e69e64dcfd12829a9975ce'>store-api.cc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libstore/store-api.cc?id=a2a3264bb38568e892e69e64dcfd12829a9975ce&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-11-17 23:15:49 +0100'>2024-11-17</span></td><td><a href='/guix/commit/nix/libstore/store-api.cc?id=cf10268a7783207aec30e0169b61362df0d2512d'>daemon: Improve error message in ‘checkStoreName’.</a><span class='msg-avail'>...<span class='msg-tooltip'>* nix/libstore/store-api.cc (checkStoreName): Clarify message when NAME
starts with a dot.

Change-Id: I045a663bc6cd9844677c65b38a31d3941cf212b5
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Brennan Vincent</td></tr>