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

KINFO_GETPROC(3)					   BSD Library Functions Manual 					  KINFO_GETPROC(3)

NAME
kinfo_getproc -- function for getting process information from kernel
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <sys/types.h> #include <libutil.h> struct kinfo_proc * kinfo_getproc(pid_t pid);
DESCRIPTION
This function is used for obtaining process information from the kernel. The pid field contains the process identifier. This should be a process that you have privilege to access. This function is a wrapper around sysctl(3) with the KERN_PROC_PID mib. While the kernel returns a packed structure, this function expands the data into a fixed record format.
RETURN VALUES
On success the kinfo_getproc() function returns a pointer to a struct kinfo_proc structure as defined by <sys/user.h>. The pointer 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_getproc() function returns NULL.
SEE ALSO
free(3), malloc(3), sysctl(3)
BSD
March 1, 2013 BSD