Open System Services Porting Guide (G06.24+, H06.03+)

Glossary
Open System Services Porting Guide—520573-006
Glossary-11
root directory
Accelerator-generated RISC instructions are produced by accelerating TNS object
code using the Accelerator program (AXCEL). Native-compiled RISC instructions are
produced by compiling source code with a TNS/R native compiler.
root directory. A directory associated with a process that the system uses for pathname
resolution when a pathname begins with a slash (/) character.
saveabend file. A file containing dump information needed by the system debugging tool. In
UNIX systems, such files are usually called core files or core dump files. A saveabend
file is a special case of a save file. See also save file and process snapshot file.
save file. A file created by the Inspect subsystem in response to a command from a
debugger. A save file contains enough information about a running process at a given
time to restart the process at the same point in its execution. A save file contains an
image of the process, data for the process, and the status of the process at the time
the save file was created.
A save file can be created through an Inspect SAVE command at any time. A save file
called a saveabend file can be created when a process’s SAVEABEND attribute is set
and the process terminates abnormally. Other debuggers can create a save file but
refer to the result as a process snapshot file. See also process snapshot file.
server application. An application that provides a service to a client application. Execution
of remote procedure calls is an example of such a service.
session. A set of process groups associated for job control purposes. A session can have a
controlling terminal.
session leader. The process that created a session.
session lifetime. The period that begins when a session is created and ends when the
lifetime of the last remaining process group of the session ends.
shared run-time library (SRL). A collection of procedures whose code and data can be
loaded and executed only at a specific assigned virtual memory address (the same
address in all processes). SRLs use direct addressing and do not have run-time
resolution of links to and from the main program and other independent libraries.
Contrast with dynamic-link library (DLL).
signal. The method by which an environment notifies a process of an event.
signal delivery. The time when Open System Services takes the action appropriate for a
specific process and a specific signal.
signal generation. The time when an event occurs that causes a signal for a process.
signal handler. A function that is executed when a specific signal is delivered to a specific
process.