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closefrom — delete open file descriptors
Standard C Library (libc, -lc)
#include <unistd.h> void closefrom(int lowfd);
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 closefrom() function first appeared in FreeBSD 8.0.