You have been subscribed to a public bug: getlogin() call in new glibc checks /proc/self/loginuid presence and trust its value as most safe source (due it's audit-related nature). But default /etc/pam.d/common-account doesn't contains entry to pam_loginuid.so which modify /proc/self/loginuid properly. This breaks getlogin() at many scenarios like this:
(pam session without pam_loginuid)$ perl -e '$t=getlogin; print "$t\n";' root (pam session without pam_loginuid)$ id uid=1000(... just because /proc/self/loginuid contains '0' value If I add pam_loginuid.so to /etc/pam.d/common-account like http://manpages.ubuntu.com/manpages/precise/man8/pam_loginuid.8.html recommend, everything worked as expected: (pam session with pam_loginuid)$ perl -e '$t=getlogin; print "$t\n";' user (pam session with pam_loginuid)$ id uid=1000(... # cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS" # dpkg -l|fgrep libpam ii libpam-ck-connector 0.4.5-2 ConsoleKit PAM module ii libpam-modules 1.1.3-7ubuntu2 Pluggable Authentication Modules for PAM ii libpam-modules-bin 1.1.3-7ubuntu2 Pluggable Authentication Modules for PAM - helper binaries ii libpam-runtime 1.1.3-7ubuntu2 Runtime support for the PAM library ii libpam0g 1.1.3-7ubuntu2 Pluggable Authentication Modules library ** Affects: openssh (Ubuntu) Importance: Undecided Status: New -- missing pam_loginuid.so breaks getlogin() https://bugs.launchpad.net/bugs/1067779 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in Ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
