Re: group '545' does not exist ?
Marco Atzeri via Cygwin <[email protected]>
| Newsgroups | gmane.os.cygwin |
|---|---|
| Message-ID | <[email protected]> |
On 05/12/2025 19:48, Corinna Vinschen via Cygwin wrote: > On Dec 5 19:30, Corinna Vinschen via Cygwin wrote: >> On Dec 5 13:40, Corinna Vinschen via Cygwin wrote: >>> On Dec 5 09:28, Marco Atzeri via Cygwin wrote: >>>> On 04/12/2025 21:50, Brian Inglis via Cygwin wrote: >>>>> On 2025-12-04 08:00, Jon Turney via Cygwin wrote: >>>>>> Actually, I think this is a shortcoming of the cygwin version of newgrp. >>>>>> The SUS description [1] of newgrp allows a numeric group id to be >>>>>> specified. >>>>>> (In fact, it includes the clarifying remark "If group is a non- >>>>>> negative numeric string and exists in the group database as a group >>>>>> name, the numeric group ID associated with that group name will be >>>>>> used as the group ID", which suggests a, um, straightforward >>>>>> implementation) >>>>>> But it seems that our implementation only currently handles a group >>>>>> name (See [2]). >>>>>> [1] https://pubs.opengroup.org/onlinepubs/7908799/xcu/newgrp.html >>>>> >>>>> That's OG SUSV2 1997 - current is at: >>>>> >>>>> https://pubs.opengroup.org/onlinepubs/9799919799/utilities/newgrp.html >>>>> >>>>>> [2] https://cygwin.com/cgit/newlib-cygwin/tree/winsup/utils/newgrp.c#n166 >>> >>> Shouldn't be too hard to add to our newgrp(1). >> >> Uhm... there's a problem here. >> >> Right now, our newgrp is commandline compatible with Linux' newgrp from >> shadow-utils: >> >> - A single '-' reinitializes the environment. >> - The group must be given as name, not as GID. >> >> This is not commandline compatible with the POSIX definition: >> >> - A '-l' reinitializes the environment. >> - The group may be given as name or GID. >> >> I can't just change it to POSIX compatible because this potentially >> breaks Linux compatibility. >> >> What we could do is to check the POSIXLY_CORRECT environment variable >> and switch the identity to POSIX if this variable is set. >> >> Make sense? > > No, scratch that, it's much eaiser. shadow-utils newgrp let's -l slip > through, any other -X results in a usage message. I can change Cygwin's > newgrp accordingly. > > The only non-compatibility is that Cygwin's newgrp allows to specify a > command. shadow-utils nad POSIX newgrp only create a new shell > environment. > > I guess we can ignore this... > > > Corinna > -- 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