NAME

     closefrom, close_range — delete open file descriptors

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     void
     closefrom(int lowfd);

     int
     close_range(u_int lowfd, u_int highfd, int flags);

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.

     The close_range() system call deletes all open file descriptors between lowfd and highfd
     inclusive, clamped to the range of open file descriptors.  Any errors encountered while
     closing file descriptors are ignored.  There are currently no defined flags.

RETURN VALUES

     Upon successful completion, close_range() returns a value of 0.  Otherwise, a value of -1 is
     returned and the global variable errno is set to indicate the error.

ERRORS

     The close_range() system call will fail if:

     [EINVAL]           The highfd argument is lower than the lowfd argument.

     [EINVAL]           An invalid flag was set.

SEE ALSO

     close(2)

HISTORY

     The closefrom() function first appeared in FreeBSD 8.0.