Open System Services Management and Operations Guide (G06.30+, H06.08+, J06.03+)

Open System
Services (OSS)
Socket Library
The OSS Layer 3 code for OSS sockets that runs as system library.
Open System
Services (OSS)
Transport Agent
A per-processor OSS helper process that acts as a messaging agent between socket requests
made on a processor and the corresponding transport provider.
orphan file A file with no corresponding inode in the PXINODE file.
orphan inode An inode that appears in the PXINODE file but has no links in the PXLINK file.
OSS See Open System Services (OSS).
OSS environment See Open System Services (OSS) environment.
OSS Monitor See Open System Services (OSS) Monitor.
OSS
SEEP-protected
Additional file-access authorization provided by an OSS Security Event-Exit Process (SEEP). For
details of OSS SEEP, see “Using an OSS Security Event-Exit Process (SEEP)” (page 231).
pathname In the OSS environment, the string of characters that uniquely identifies a file within its file system.
A pathname can be either relative or absolute. See also ISO/IEC IS 9945-1:1990 (ANSI/IEEE
Std. 1003.1-1990 or POSIX.1), Clause 2.2.2.57.
pathname
component
See “Checking the Current State of a Fileset” (page 151).
pathname
resolution
In the OSS environment, the process of associating a single file with a specified pathname.
pipe An unnamed FIFO, created programmatically by invoking the pipe() function or interactively
with the shell pipe syntax character (|). A shell pipe redirects the standard output of one process
to become the standard input of another process. A programmatic pipe is an interprocess
communication mechanism.
See also pipe/FIFO, FIFO.
pipe/FIFO An open of a pipe or FIFO. Specified this way because they share the same underlying data
structures and both use the same open table.
See also pipe, FIFO.
POSIX extended
segment
A Global Priv addressable memory segment that provides pool space for OSS data structures.
PXS buffers are created in 32-bit addressable memory and PXS64 buffers are created in 64-bit
addressable memory.
process-blocking
function
A function that blocks the entire process, instead of only the calling thread, if it must wait for I/O
to complete.
See also thread-blocking function.
pthread Standard POSIX threads
PXS See POSIX extended segment.
PXS64 See POSIX extended segment.
regular file A type of file that is a randomly accessible sequence of bytes, with no further structure imposed
by the system. Its size can be extended.
relative pathname A pathname that does not begin with a slash (/) character. A relative pathname is resolved
beginning with the current working directory. Contrast with absolute pathname.
restricted-access
fileset
A fileset that has a RESTRICTEDACCESS attribute value of ENABLED or LOCAL. A restricted-access
fileset requires the super ID to adhere to the same file permissions and owner privileges as any
other user ID.
See also fileset.
root directory A directory associated with a process that the system uses for pathname resolution when a
pathname begins with a slash (/) character.
root fileset The fileset with the device identifier of 0, normally containing the root directory for the OSS file
system in an HP NonStop system. HP recommends that this fileset be named “root”.
root user The user with the user name of root.
424 Glossary