Communicator 3000 MPE/iX Release 6.0 (Platform Software Release C.60.00) (30216-90269)

Chapter 3 59
System Management
MPE/iX POSIX Installation Changes
• The popular "ll" alias is defined as "ls -l".
• The cursor is not homed and the screen is no longer cleared.
• The current working directory (CWD) is not altered (see also the SH
UDC changes).
The above changes in /etc/profile should make the shell more
user-friendly.
"SH" UDC:
The HPPXUDC.PUB.SYS file contains the "SH" UDC, among other
useful POSIX-related UDCs. This UDC file has been in FOS since
Release 5.0 but is not cataloged by default. The "SH" UDC has been
modified in Release 6.0.
Assuming that an SH command from the CI invokes the SH UDC
described here, the shell can be invoked from the CI in a more
UNIX-like manner as:
:sh -c makefile_6.0
which runs the shell (SH.HPBIN.SYS) passing it the name (in POSIX
syntax) of a file to execute. In this case the filename passed to the shell
is "makefile_6.0" in the current working directory (CWD) and in
lowercase.
This is because the "SH" UDC has been simplified to accept any number
of parameters and to no longer change the CWD. In prior MPE releases,
the SH UDC changed the CWD to the user's home group in order to
keep the shell's history file in a single location for individual users. Now
the history file is defined by the HISTFILE shell variable, which is
defined in /etc/profile.
Users that depended on the SH UDC to change the CWD to their home
group will need to issue the shell's "cd" command to establish the CWD
in the desired location. For example, to change the CWD to the users'
home group the following command can be executed directly from the
shell or via the .profile file:
cd /$HPACCOUNT/$HPHGROUP
This assumes that the user has a home group assigned. See the
contents of /etc/profile on how to handle cases where a home group is
not defined.
UNIX Porting
Existing archive library (".a") files residing in /lib or /usr/lib are
converted to shared library (".sl") files, leaving the original ".a" files
intact. This conversion is done in the I0036431.HP36431.SUPPORT job