Glossary

Filter:
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S
S
S&T
SAO
SAP
SAV
Say
SCG
SCI
SCP
SDR
Set
S-F
SFA
SI
SIG
SMM
SMO
SMU
SO
SOH
SON
SOS
SOW
SPK
Spl
SPO
SPS
Spy
SRI
SRP
SRR
SSE
SSO
SSR
STD
STI
STS
STU
STX
SUB
SYN
Sponge
  • n. [UNIX] A special case of a filter that reads its entire input before writing any output; the canonical example is a sort utility. Unlike most filters, a sponge can conveniently overwrite the input file with the output data stream. If a file system has versioning (as ITS did and VMS does now) the sponge/filter distinction loses its usefulness, because directing filter output would just write a new version. See also slurp.