ENOENT; a diagnostic is printed only if .silent_exec_failure is 0.
. Otherwise, the program is run. If it terminates regularly, its exit
- code is returned. No diagnistic is printed, even if the exit code is
+ code is returned. No diagnostic is printed, even if the exit code is
non-zero.
. If the program terminated due to a signal, then the return value is the
There are serious restrictions on what the asynchronous function can do
-because this facility is implemented by a pipe to a forked process on
-UNIX, but by a thread in the same address space on Windows:
+because this facility is implemented by a thread in the same address
+space on most platforms (when pthreads is available), but by a pipe to
+a forked process otherwise:
. It cannot change the program's state (global variables, environment,
etc.) in a way that the caller notices; in other words, .in and .out