HP-UX Reference (11i v2 04/09) - 7 Device (Special) Files, 9 General Information, Index (vol 10)

s
glossary(9) glossary(9)
stderr
See standard error.
stdin
See standard input.
stdout
See standard output.
stream
A term most often used in conjunction with the standard I/O library routines documented in Section 3 of
this manual. A stream is simply a file pointer (declared as
FILE *stream) returned by the fopen (3S)
library routines. It may or may not have buffering associated with it (by default, buffering is assigned,
but this can be modified with setbuf (3S)).
sticky bit
A single bit in the mode of every file in the file system. If set on a regular file, the contents of the file
stay permanently in memory instead of being swapped back out to disk when the file has finished execut-
ing. Only superuser can set the sticky bit on a regular file. The sticky bit is read each time the file is
executed (via exec(2)).
If set on a directory, the files in that directory can be removed or renamed only by the owner of the file,
the owner of the directory containing the file, or superuser. See also chmod(2), rename(2), rmdir(2), and
unlink(2).
subdirectory
A directory that is one or more levels lower in the file system hierarchy than a given directory. Some-
times called a subordinate directory.
subordinate directory
See subdirectory.
Subset 1980
See CS/80.
superblock
A block on each file system’s mass storage medium which describes the file system. The contents of the
superblock vary between implementations. Refer to the system administrator manuals supplied with
your system for details.
superuser
The HP-UX system administrator. This user has access to all files, and can perform privileged opera-
tions. superuser has a real user ID and effective user ID of 0, and, by convention, the user name of
root.
superior directory
See parent directory.
supplementary group ID
A process has up to
NGROUPS_MAX supplementary group IDs used in determining file access permis-
sions, in addition to the effective group ID. The supplementary group IDs of a process are set to the sup-
plementary group IDs of the parent process when the process is created.
symbolic link
A type of file that indirectly refers to a path name. See symlink (4).
system
The HP-UX operating system. See also kernel.
system asynchronous I/O
A method of performing I/O whereby a process informs a driver or subsystem that it wants to know when
data has arrived or when it is possible to perform a write request. The driver or subsystem maintains a
set of buffers through which the process performs I/O. See ioctl (2), read (2), select (2), and write (2) for
Section 9−−24 Hewlett-Packard Company − 23 − HP-UX 11i Version 2: September 2004