term% cat index.txt CLOSE(2) System Calls Manual CLOSE(2)
NAME
close - close a file
SYNOPSIS
close(fildes)
DESCRIPTION
Given a file descriptor such as returned from an open, creat, dup or
pipe(2) call, close closes the associated file. A close of all files
is automatic on exit, but since there is a limit on the number of open
files per process, close is necessary for programs which deal with many
files.
Files are closed upon termination of a process, and certain file de‐
scriptors may be closed by exec(2) (see ioctl(2)).
SEE ALSO
creat(2), open(2), pipe(2), exec(2), ioctl(2)
DIAGNOSTICS
Zero is returned if a file is closed; -1 is returned for an unknown
file descriptor.
ASSEMBLER
(close = 6.)
(file descriptor in r0)
sys close
CLOSE(2)