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

Glossary
Open System Services Porting Guide—520573-006
Glossary-12
signal mask
signal mask. The set of signals that are currently blocked from delivery to a specific
process.
snapshot file. See process snapshot file.
socket. An end-point for stream-oriented communication. A socket has a file descriptor.
special character. A character entered from a terminal that has an effect other than being
part of the input stream from that terminal.
static server. In the Guardian environment, a process that runs continuously and provides a
specific service to other processes. A static server differs from a traditional UNIX
demon in that a demon actively looks for tasks to perform, while a static server
performs only tasks brought to its attention by a client (requester) process. See also
demon.
storage pool. A set of physical disk volumes administered as a set of logical disk volumes.
A logical disk volume can span multiple physical disk volumes. When a logical disk
volume becomes full, more physical disk volumes can be added.
strictly conforming POSIX.1 application. An application that requires only the facilities
described in ISO/IEC IS 9945-1: 1990 and the applicable computer language
standards. Such an application must accept any behavior or value described in
ISO/IEC IS 9945-1: 1990 as unspecified or implementation-defined and, for symbolic
constants, accept any value permitted by ISO/IEC IS 9945-1: 1990.
super ID. On HP NonStop systems, a privileged user who can read, write, execute, and
purge all files on the system. The super ID is usually a member of a system-supervisor
group.
The super ID has the set of special permissions called appropriate privileges. In the
Guardian environment, the structured view of the super ID, which is (255, 255), is most
commonly used; in the OSS environment, the scalar view of the super ID, which is
65535, is most commonly used.
SVID. The System V Interface Definition for UNIX, published by AT&T.
SVR4. System V Release 4, a specific implementation of UNIX. See System V.
symbolic link. A type of special file that acts as a name pointer to another file. A symbolic
link contains a pathname and can be used to point to a file in another fileset. Symbolic
links are not included in ISO/IEC IS 9945-1: 1990. Compare to hard link.
system. A single copy of the HP NonStop operating system.
system process. A part of a single copy of the HP NonStop operating system with OSS
interfaces. A system process does not have an OSS process ID.
System V. A version of UNIX developed and marketed originally by AT&T.