Information Technology Reference
In-Depth Information
e.g.,du-s.
e.g.,cd..
Accesscontrol
eachfile--metadata--e.g.,owner,group,permissions
(read/write/execute)forowner/group/all
storedwithfile
checkedonopen/close
open/close:
->cachefilelookup
nameresolution(path,currentdirectory)
accesscontrolchecks(openmode--read/write/create/delete)
filedescriptors/handles
create/delete
read/write/seek
currentposition
flush
example:createfile,writehelloworldtoit,
mappedfileAPI
mmap/mmunmap
load/store
example
mmapfile
writehelloworldtoit
close/munmap
openfile
readandprint
DEFER:Sidebar:everythingisafile
filehandle=levelofindirection
athingyoucanwritetoorreadfrom
