[Bug 1491] New: Shadow and PAM

blfs-bugs at linuxfromscratch.org blfs-bugs at linuxfromscratch.org
Tue Aug 2 17:09:31 PDT 2005


           Summary: Shadow and PAM
           Product: Beyond LinuxFromScratch
           Version: a-SVN
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: trivial
          Priority: P2
         Component: BOOK
        AssignedTo: blfs-book at linuxfromscratch.org
        ReportedBy: larry at linuxfromscratch.org
         QAContact: blfs-book at linuxfromscratch.org

I have found one situation where it doesn't work as it did. su used to get its
PATH from /etc/login.defs using ENV_PATH and ENV_SUPATH.  These are no longer
available and according to the mailing list, are pam's responsibility.  So the
path after su or su <user> is "/usr/gnu/bin:/usr/local/bin:/bin:/usr/bin:."
(default path coded in Bash source).  This does not affect "su -" as that
sources /etc/profile.  The PATH can be set by the pam_env.so module by editing
PATH          DEFAULT=/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin \
and adding pam_env.conf to the auth section of /etc/pam.d/su.

I have not found a way to drop in a default PATH for root when su is used. 
Under these conditions, "su -" is the only sure way to get a root path.

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