Bug: execve on Windows changes pid #1334
Description
Contact Details
No response
What happened?
On linux, the PID doesn't change inside a forked process if you call execve. So you can fork, take the PID and send signals to the process. This is what I am trying to achieve.
It seems the PID does change on Windows though. If I try to send a signal to a spawned process, I get error "kill() failed: No such process (win32 error 87)". If I inspect the processes, a process with such PID is indeed not found, and the spawned process has a different PID.
If I add a Sleep, the process with forked PID exists during the sleep, but when the calc process is spawned, the forked process is killed and calc has a completely different PID and doesn't appear "under" redbean i.e. shutting down redbean process group doesn't kill it.
I wonder is there a way to simulate Linux behavior in Windows? If not, maybe there at least a way to get the spawned PID somehow? Also, if it is not possible to achieve on Windows, I think it should at least be documented.
Version
redbean 3.0.0
What operating system are you seeing the problem on?
Windows
Relevant log output
$ ./redbean-3.0.0.com
I2024-12-06T12:50:53.864718:tool/net/redbean.c:7052:redbean-3:13316] (srvr) listen http://192.168.56.1:8080
I2024-12-06T12:50:53+001019:tool/net/redbean.c:7052:redbean-3:13316] (srvr) listen http://192.168.99.1:8080
I2024-12-06T12:50:53+001114:tool/net/redbean.c:7052:redbean-3:13316] (srvr) listen http://192.168.1.225:8080
I2024-12-06T12:50:53+001122:tool/net/redbean.c:7052:redbean-3:13316] (srvr) listen http://127.0.0.1:8080
I2024-12-06T12:50:53+000738:tool/net/redbean.c:7052:redbean-3:13316] (srvr) listen http://172.22.224.1:8080
>: pid = unix.fork(); print(pid); if pid == 0 then unix.execve('/C/WINDOWS/system32/calc.exe', {'/C/WINDOWS/system32/calc.exe'}) end
28540
>: 0
>: pid
28540
>: unix.kill(pid, unix.SIGINT)
nil "kill() failed: No such process (win32 error 87)"
>:
I2024-12-06T12:51:43.839580:tool/net/redbean.c:7077:redbean-3:13316] (srvr) received SIGHUP
I2024-12-06T12:51:43+002503:tool/net/redbean.c:7081:redbean-3:13316] (srvr) killing process group
I2024-12-06T12:51:43+002872:tool/net/redbean.c:7085:redbean-3:13316] (srvr) shutdown complete