RTEMS 4.9.3 On-Line Library

Process Environment Manager User and Group Names

RTEMS POSIX API User's Guide

3.2.2: User and Group Names

POSIX considers user and group Ids to be a unique integer that may be associated with a name. This is usually accomplished via a file named /etc/passwd for user Id mapping and /etc/groups for group Id mapping. Again, although RTEMS is effectively a single process and thus single user system, it provides limited support for user and group names. When configured with an appropriate filesystem, RTEMS will access the appropriate files to map user and group Ids to names.

If these files do not exist, then RTEMS will synthesize a minimal version so this family of services return without error. It is important to remember that a design goal of the RTEMS POSIX services is to provide useable and meaningful results even though a full process model is not available.

RTEMS POSIX API User's Guide