[issue10032] os.setuid and os.setgid have unexpected influence on serial module

Ned Deily added the comment: "It could be a feature of os that the groups of the user are set on a os.setuid call? Or would this break compatibility with the standard unix library behaviour?" The POSIX system interface specification specifically prohibits that: "The setuid() function shall n

[issue10032] os.setuid and os.setgid have unexpected influence on serial module

Tjeerd Pinkert added the comment: Indeed I use Linux, sorry for the inconvenience of not mentioning. Thanks Ned, I think this is indeed the case. Using os.setgroups with a list of group ids (one for the file access, one for the serial port) before switching user with os.setgid, os.setuid solv

[issue10032] os.setuid and os.setgid have unexpected influence on serial module

R. David Murray added the comment: If you do want to pursue this further note that "[your] own crappy code" is a better reproducer to post than something that depends on a third party module. -- nosy: +r.david.murray ___ Python tracker

[issue10032] os.setuid and os.setgid have unexpected influence on serial module

Ned Deily added the comment: While you did not specify what platform you are running this on, the issue here is almost certainly a misunderstanding of how permissions work. On UNIX-y systems, access to device files is normally governed by permissions like any other file or directory. On man

[issue10032] os.setuid and os.setgid have unexpected influence on serial module

Changes by Tjeerd Pinkert : -- type: -> behavior ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.p

[issue10032] os.setuid and os.setgid have unexpected influence on serial module

New submission from Tjeerd Pinkert : If I use os.setgid and os.setuid to switch to an other user in some daemon code, I cannot open the serial port anymore. If I run the same code directly from the user I can open the serial port. Since the serial module is using the open() call to open the se