Name

-d27.9

Synopsis

The -d27.9 debugging switch causes sendmail to trace the setting and resetting of its user-id and group-id identities when processing :include: and ~/.forward files. First, an additional line is printed below the output of the -d27.2 and -d27.4 debugging switches: 

include(file)                         ← printed with -d27.2 
   ruid=real-user-id euid=effective-user-id←printed with -d27.4
include: old uid = real-user-id/effective-user-id

The second and third lines contain the same information. After the new line is printed, sendmail might or might not change its identity depending on the nature of a :include: or ~/.forward file and that file’s controlling user. Regardless of whether it changed, sendmail prints: 

include: new uid = real-user-id/effective-user-id

After sendmail has finished processing a :include: or ~/.forward file, it resets its user-id and group-id back to their original values and displays the result: 

include: reset uid = real-user-id/effective-user-id

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