CLOSEFROM(3) Library Functions Manual CLOSEFROM(3)

closefromdelete many descriptors

#include <unistd.h>

int
closefrom(int fd);

The () call deletes all descriptors numbered fd and higher from the per-process file descriptor table. It is effectively the same as calling close(2) on each descriptor.

Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.

closefrom() will fail if:

[]
fd is invalid.
[]
An interrupt was received.

close(2)

This function first appeared in NetBSD 3.

November 9, 2022 NetBSD 11.0