openbsd/src/lib/libc/net, branch libressl-v3.2.7

Add support for timeconting in userland.

2020-07-06T13:33:06+00:00

This diff exposes parts of clock_gettime(2) and gettimeofday(2) to userland via libc eliberating processes from the need for a context switch everytime they want to count the passage of time. If a timecounter clock can be exposed to userland than it needs to set its tc_user member to a non-zero value. Tested with one or multiple counters per architecture. The timing data is shared through a pointer found in the new ELF auxiliary vector AUX_openbsd_timekeep containing timehands information that is frequently updated by the kernel. Timing differences between the last kernel update and the current time are adjusted in userland by the tc_get_timecount() function inside the MD usertc.c file. This permits a much more responsive environment, quite visible in browsers, office programs and gaming (apparently one is are able to fly in Minecraft now). Tested by robert@, sthen@, naddy@, kmos@, phessler@, and many others! OK from at least kettenis@, cheloha@, naddy@, sthen@

A comma is not appropriate here, use a semicolon

2020-04-25T21:06:17+00:00

Suggested by Evan Silberman, confirmed by jmc@

Discourage use of RES_USE_INET6

2020-04-25T16:23:59+00:00

Suggested by eric@, input from deraadt@, ok deraadt@ eric@

Fix RES_USE_INET6 description

2020-04-25T14:30:05+00:00

The previous wording implied this option does nothing, which is wrong. This option does affect the way gethostbyname(3) works on OpenBSD (return IPv6 addresses if available). On some systems, it also introduces IPv4-mapped IPv6 addresses, a "feature" that we don't support. ok deraadt@ eric@

delete wasteful ;;

2020-01-22T07:52:37+00:00

ok tedu

mop up resolver.3 rename; ok deraadt

2019-08-30T20:20:51+00:00

mop up for inet_net rename; ok deraadt

2019-08-30T20:06:07+00:00

Move 4 manual pages from not-a-function filenames to a correct filename,

2019-08-30T18:33:17+00:00

and correct Xr. ok jmc

snprintf/vsnprintf return < 0 on error, rather than -1.

2019-07-03T03:24:04+00:00

When system calls indicate an error they return -1, not some arbitrary

2019-06-28T13:35:02+00:00

value < 0. errno is only updated in this case. Change all (most?) callers of syscalls to follow this better, and let's see if this strictness helps us in the future.