ping6: Replace gettimeofday() with clock_gettime(CLOCK_MONOTONIC)

[jansucan]

Summary

Replace gettimeofday() with clock_gettime(CLOCK_MONOTONIC)

Submitted by: Ján Sučan <[e-mail]>
Sponsored by: Google, inc. (Google Summer of Code 2019)

[asomers]

Thanks for fixing this. This will be a good change.

sbin/ping6/ping6.c

2218

You should eliminate this function and use timespecsub(3) instead.

[jansucan]

Use timespecsub(3) instead of a private function.

[jansucan]

sbin/ping6/ping6.c

2218

Fixed.

[jansucan]

Annotate truncating of time values saved in a packet.

[asomers]

sbin/ping6/ping6.c

1152–1154

These 10 lines can be replaced by timespecadd.

[jansucan]

Use timespecadd(), timespecsub(), and timespecclear().

[jansucan]

sbin/ping6/ping6.c

1152–1154

Fixed.

[asomers]

sbin/ping6/ping6.c

1152–1154

Thanks. It's much more readable now.