On Sun, 5 Dec 2021, Anthony Walter via fpc-pascal wrote:
On Linux using 3.3.1 build of FPC I've found that in many situations the
Running property of TProcess is unreliable. Is this a problem with
which anyone is familiar? I've searched around and haven't found any
discussions related to this problem.
I've never known it to report falsely.
Reading 'Running' finally does a WaitPID call and this is a kernel call:
Function TProcess.PeekExitStatus : Boolean;
var
res: cint;
begin
repeat
res:=fpWaitPid(Handle,pcint(@FExitCode),WNOHANG);
until (res<>-1) or (fpgeterrno<>ESysEINTR);
result:=res=Handle;
if peekexitstatus returns true (i.e. the process has exited) then running is
set to false.
Try running your program under strace
strace -f --trace=%process yourprogram
(so it only shows process management calls) and see what waitpid returns.
Michael.
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