On Mon, 30 Jun 2025, Corinna Vinschen via Cygwin wrote: > On Jun 28 12:32, Jeremy Drake via Cygwin wrote: > > I was looking at setpgid yesterday, and it seems deficient with respect to > > the errors required to be returned by the POSIX docs in > > https://pubs.opengroup.org/onlinepubs/9799919799/functions/setpgid.html > > > > Basically, it seems that setpgid allows any arbitrary positive integer to > > be set as pgid, rather than restricting to setting it to either the > > process's pid or to an existing pgid in the same session (sid). > > Yeah, error checking in setpgid is a bit on the lacking side. With only > minor changes, the function is basically 25 years old :}
The POSIX docs metioned that an old BSD allowed setting arbitrary pgid > Off the top of my head I don't know how to check the pgid already exists. > Do you? I think it'd have to iterate all processes and check pgid and sid members of pinfo until it found a match. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
