Dissociate controlling tty better on Darwin

* src/process.c (dissociate_controlling_tty): New function.
(create_process): Use it to dissociate controlling tty if setsid
fails, which happens on Darwin after a vfork (Bug#33154).
Do this on all platforms, not just on Darwin, as a similar
problem is plausible elsewhere.
* src/callproc.c (call_process): Use the new function here, too,
for consistency and to avoid duplicate code.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/process.h b/src/process.h
index 3c6dd7b91f4..67b783400d8 100644
--- a/src/process.h
+++ b/src/process.h
@@ -300,6 +300,7 @@ extern Lisp_Object network_interface_info (Lisp_Object);
 extern Lisp_Object remove_slash_colon (Lisp_Object);
 
 extern void update_processes_for_thread_death (Lisp_Object);
+extern void dissociate_controlling_tty (void);
 
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