libprocstat replacement for environ on FreeBSD

foo.cc

#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <libprocstat.h>

#include <unistd.h>
#include <iostream>

int main() {
        struct procstat* procstat = procstat_open_sysctl();
        unsigned cnt{};
        struct kinfo_proc* kipp = procstat_getprocs(procstat, KERN_PROC_PID, getpid(), &cnt);
        char** envs = procstat_getenvv(procstat, kipp, 0);
        for (size_t i = 0; envs[i]; ++i) {
                std::cout << "\"" << envs[i] << "\"" << std::endl;
        }
        procstat_freeenvv(procstat);
        procstat_freeprocs(procstat, kipp);
        procstat_close(procstat);
        return 0;
}

run.log

[zao@freja ~/pstest]$ c++ -o foo foo.cc -lprocstat
[zao@freja ~/pstest]$ ./foo
"SHELL=/usr/local/bin/bash"
"EDITOR=vi"
"ENV=/home/zao/.shrc"
"PWD=/home/zao/pstest"
"HOME=/home/zao"
"TERM=screen"
"USER=zao"
"SHLVL=1"
"PAGER=less"
"PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/home/zao/bin"
"BLOCKSIZE=K"
"MAIL=/var/mail/zao"
"_=./foo"
"OLDPWD=/home/zao"
[zao@freja ~/pstest]$ ldd ./foo
./foo:
        libprocstat.so.1 => /usr/lib/libprocstat.so.1 (0x80024e000)
        libc++.so.1 => /usr/lib/libc++.so.1 (0x80025b000)
        libcxxrt.so.1 => /lib/libcxxrt.so.1 (0x800328000)
        libm.so.5 => /lib/libm.so.5 (0x80034a000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x80037c000)
        libc.so.7 => /lib/libc.so.7 (0x800396000)
        libelf.so.2 => /lib/libelf.so.2 (0x80078c000)
        libkvm.so.7 => /lib/libkvm.so.7 (0x8007a7000)
        libutil.so.9 => /lib/libutil.so.9 (0x8007ba000)
[zao@freja ~/pstest]$