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FreeBSD 11.0 - man page for kinfo_getfile (freebsd section 3)

KINFO_GETFILE(3)					   BSD Library Functions Manual 					  KINFO_GETFILE(3)

NAME
kinfo_getfile -- function for getting per-process file descriptor information
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <sys/types.h> #include <libutil.h> struct kinfo_file * kinfo_getfile(pid_t pid, int *cntp);
DESCRIPTION
This function is used for obtaining the file descriptor information of a particular process. The pid field contains the process identifier. This should be the a process that you have privilege to access. The cntp field allows the caller to know how many records are returned. This function is a wrapper around sysctl(3) with the KERN_PROC_FILEDESC mib. While the kernel returns a packed structure, this function expands the data into a fixed record format.
RETURN VALUES
On success the kinfo_getfile() function returns a pointer to an array of struct kinfo_file structures as defined by <sys/user.h>. The array was obtained by an internal call to malloc(3) and must be freed by the caller with a call to free(3). On failure the kinfo_getfile() func- tion returns NULL.
SEE ALSO
free(3), kinfo_getvmmap(3), malloc(3), sysctl(3)
BSD
December 6, 2008 BSD