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FreeBSD 11.0 - man page for closefrom (freebsd section 2)

CLOSEFROM(2)						      BSD System Calls Manual						      CLOSEFROM(2)

NAME
closefrom -- delete open file descriptors
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h> void closefrom(int lowfd);
DESCRIPTION
The closefrom() system call deletes all open file descriptors greater than or equal to lowfd from the per-process object reference table. Any errors encountered while closing file descriptors are ignored.
SEE ALSO
close(2)
HISTORY
The closefrom() function first appeared in FreeBSD 8.0.
BSD
June 12, 2009 BSD