https://man7.org/linux/man-pages/man2/setgid.2.html
setgid(2) - Linux manual page
setgid2linuxmanual
https://man7.org/linux/man-pages/man3/setgid.3p.html
setgid(3p) - Linux manual page
setgid3plinuxmanual
https://www.openwall.com/lists/oss-security/2015/12/14/8
oss-security - Re: User man Local Root Exploit/Linux Kernel setgid Directory Privilege...
https://www.php.net/manual/pt_BR/function.posix-setgid.php
PHP: posix_setgid - Manual
Define o GID do processo atual
phpposixsetgidmanual
https://www.php.net/manual/uk/function.posix-setgid.php
PHP: posix_setgid - Manual
Set the GID of the current process
phpposixsetgidmanual
https://winscp.net/forum/viewtopic.php?t=23005
setuid,setgid,sticky not working in 5.7.7 ? :: Support Forum :: WinSCP
WinSCP is a free file manager for Windows supporting FTP, SFTP, S3 and WebDAV.
not working5 7support forumsetuidsetgid
https://www.drupal.org/node/2955675
chgrp during provision strips off setgid directory bit [#2955675] | Drupal.org
Apr 26, 2018 - So I was wondering why setgid directories weren't working properly during provisioning. I realized just now that it's because provision is calling chgrp. POSIX...
chgrpprovisionstrips
https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/TDZ5EZT6IMUQ66PKOTK6RLRVZQGYU3L3/
[Dovecot] Deliver setgid failed: Operation not permitted - dovecot - dovecot.org
dovecotdeliversetgidfailedoperation
https://www.elastic.co/docs/reference/security/prebuilt-rules/rules/linux/privilege_escalation_suspicious_uid_guid_elevation
Privilege Escalation via CAP_SETUID/SETGID Capabilities | Prebuilt detection rules reference
Identifies instances where a process (granted CAP_SETUID and/or CAP_SETGID capabilities) is executed, after which the user's access is elevated to UID/GID...
privilege escalationvia capdetection rulessetuid
https://winscp.net/forum/viewtopic.php?t=437
setgid bit :: Support Forum :: WinSCP
WinSCP is a free file manager for Windows supporting FTP, SFTP, S3 and WebDAV.
support forumsetgidbitwinscp
https://openwall.com/lists/oss-security/2015/12/14/12
oss-security - Re: User man Local Root Exploit/Linux Kernel setgid Directory Privilege...
https://www.mail-archive.com/search?l=courier-users@lists.sourceforge.net&q=subject:%22Re%5C%3A+%5C%5Bcourier%5C-users%5C%5D+setuid%5C%2Fsetgid+problem%2C+mail+from+website+not++sent%22&o=newest&f=1
subject:"Re\: \[courier\-users\] setuid\/setgid problem, mail from website not sent"
https://lkml.org/lkml/2017/1/27/966
LKML: Andy Lutomirski: [PATCH v2 0/2] setgid hardening
v2 0lkmlandypatchsetgid