Use dup2 on FreeBSD aarch64

[MikaelUrankar]

Hi,

I have the following errors on FreeBSD aarch64 :
logging/logging_arm64.go:11:2: undefined: syscall.Dup3

Is it possible to bump gopsutil version? It's a bit old and doesn't have the FreeBSD aarch64 bits:

# github.com/shirou/gopsutil/cpu
vendor/github.com/shirou/gopsutil/cpu/cpu_freebsd.go:25:16: undefined: cpuTimes
vendor/github.com/shirou/gopsutil/cpu/cpu_freebsd.go:42:31: undefined: cpuTimes
vendor/github.com/shirou/gopsutil/cpu/cpu_freebsd.go:66:38: undefined: cpuTimes
vendor/github.com/shirou/gopsutil/cpu/cpu_freebsd.go:72:15: undefined: cpuTimes
vendor/github.com/shirou/gopsutil/cpu/cpu_freebsd.go:87:13: undefined: cpuTimes
# github.com/shirou/gopsutil/disk
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:26:36: undefined: MNT_WAIT
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:31:15: undefined: Statfs
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:32:28: undefined: MNT_WAIT
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:38:17: undefined: MNT_RDONLY
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:41:17: undefined: MNT_SYNCHRONOUS
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:44:17: undefined: MNT_NOEXEC
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:154:9: undefined: Bintime
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:163:22: undefined: Statfs
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:167:54: undefined: Statfs
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:182:32: undefined: Devstat
vendor/github.com/shirou/gopsutil/disk/disk_freebsd.go:44:17: too many errors

Thanks!

[xxxserxxx]

I had to pin gopsutil because of some breakage when I let it update a few weeks ago; I may even have filed a bug on gopsutil, but I'll try it again this weekend and see if it works any better.

As for the pull request: first, thanks! I'll merge it after I can actually test FreeBSD builds this weekend; it didn't occur to me until yesterday that I could run FreeBSD in VMWare and test gotop there.

[xxxserxxx]

@MikaelUrankar , gopsutil 2.20 has problems building on FreeBSD, so I'm going to have to roll it back.

See this build for more information.

[xxxserxxx]

Turns out it wasn't a gopsutil issue, but rather an x/sys/util upstream API break (shirou/gopsutil#853). I'm rolling it back-back, because I still can't remember what broke that caused me to pin it at 2.18. gopsutil 2.20.x seems to be stable, on Linux, in any case.

[xxxserxxx]

This has been merged on v3.5 and master.

[MikaelUrankar]

Thank you!