https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=169a760e5d831f7862ff45812fc0c94fe8df88ec
commit 169a760e5d831f7862ff45812fc0c94fe8df88ec Author: Corinna Vinschen <[email protected]> AuthorDate: Fri Jan 16 12:00:36 2026 +0100 Commit: Corinna Vinschen <[email protected]> CommitDate: Fri Jan 16 12:00:36 2026 +0100 Cygwin: internal_getlogin: always call internal_getgroups Commit 29b7313d2225 ("* cygheap.h (enum cygheap_pwdgrp::cache_t): Remove.") changed an initial conditional to skip calling internal_getgroups() if we're running with cygserver account caching in place. This breaks changing the primary group. Unfortunately the commit message doesn't explain why the change was made. Just calling internal_getgroups() all the time fixes this behaviour. Fixes: 29b7313d2225 ("* cygheap.h (enum cygheap_pwdgrp::cache_t): Remove.") Addresses: https://cygwin.com/pipermail/cygwin/2026-January/259250.html Signed-off-by: Corinna Vinschen <[email protected]> Diff: --- winsup/cygwin/release/3.6.7 | 4 ++++ winsup/cygwin/uinfo.cc | 3 +-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/winsup/cygwin/release/3.6.7 b/winsup/cygwin/release/3.6.7 index defe55ffe75e..050f6008084e 100644 --- a/winsup/cygwin/release/3.6.7 +++ b/winsup/cygwin/release/3.6.7 @@ -3,3 +3,7 @@ Fixes: - Guard c32rtomb against invalid input characters. Addresses a testsuite error in current gawk git master. + +- Allow changing primary group even when running with cygserver account + caching. + Addresses: https://cygwin.com/pipermail/cygwin/2026-January/259250.html diff --git a/winsup/cygwin/uinfo.cc b/winsup/cygwin/uinfo.cc index 1eb52f14578c..73e61cbffc82 100644 --- a/winsup/cygwin/uinfo.cc +++ b/winsup/cygwin/uinfo.cc @@ -153,8 +153,7 @@ internal_getlogin (cygheap_user &user) and the primary group in the token. */ pwd = internal_getpwsid (user.sid (), &cldap); pgrp = internal_getgrsid (user.groups.pgsid, &cldap); - if (!cygheap->pg.nss_cygserver_caching ()) - internal_getgroups (0, NULL, &cldap); + internal_getgroups (0, NULL, &cldap); if (!pwd) debug_printf ("user not found in passwd DB"); else
