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* For page-sized and larger allocations do not put the pages we'reotto2020-09-061-21/+18
| | | | | | | shaving off into the cache but unamp them. Pages in the cache get re-used and then a future grow of the first allocation will be hampered. Also make realloc a no-op for small shrinkage. ok deraadt@
* Add support for timeconting in userland.pirofti2020-07-062-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | 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@
* This patch fixes one bug and one instance of undesirable behaviour.schwarze2020-05-271-9/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bug, present since 4.4BSD, was that a trailing dash in an option group, when the dash is not permitted as an option letter, resulted in the whole option group being returned as an argument, even though the previous option in the group was already parsed as an option: OPTS=abc ./getopt-test -a- -c arg ===>> OPT(a)ARG(-a-)ARG(-c)ARG(arg). Instead, treat the dash as an invalid option and continue parsing options: ===>> OPT(a)ERR(?-)OPT(c)ARG(arg). The undesirable behaviour was that allowing the dash as an option letter only allowed isolated dashes ("-") and trailing dashes in groups ("-a-"), but neither middle dashes in groups ("-a-b"), even though that already partially worked in 4.4BSD, nor leading dashes in groups ("--a"), even though that works on all other BSDs and on glibc. Also, while POSIX does not require that the dash can be used as an option letter at all, arguably, it encourages that letters either be fully supported or not supported at all. It is dubious whether supporting an option letter in some positions but not in others can be considered conforming. This patch makes OpenBSD behaviour identical to FreeBSD and NetBSD, improves compatibility with glibc (except that glibc does not support isolated "-"), improves compatibility with DragonFly (except that DragonFly is buggy when the dash option letter can take an optional argument but that argument is not present), improves compatibility with Illumos and Solaris 11 (except those do not support "-" and mishandle "--a"), and restores 4.4BSD behaviour for "-a-b". In no respect i'm aware of is compatibility with any other systems reduced. For the full rationale, see my mail to tech@ on 30 Mar 2020 14:26:41 +0200. Part of the problem was originally reported by an anonymous coward on tech@ on 12 Mar 2020 03:40:24 +0200, additional analysis was contributed by martijn@, and then the OP sent the final version of the patch i'm now committing on 17 Mar 2020 19:17:56 +0200. No licensing problem here because after the commit, the file does not contain a single word written by the OP. Also, the OP told me in private mail that he intends to publish the patch under the ISC license already contained in the file and that he wishes to be known by the pseudonym "0xef967c36". OK martijn@, and no objection when shown on tech@, but commit delayed to stay clear of the release.
* Minimal maintenance to make this mess slightly less confusing:schwarze2020-04-261-10/+10
| | | | | | | queue -> list; mention "intrusive"; element -> member at one place; delete a bogus remark that maybe referred to a long-gone implementation in VAX assembly code. Much more could be improved, but i don't want to waste too much time here.
* fix the description; from andras farkasjmc2020-04-261-5/+4
| | | | | | ok schwarze kill a Tn while here...
* A comma is not appropriate here, use a semicolonjca2020-04-251-2/+2
| | | | Suggested by Evan Silberman, confirmed by jmc@
* Discourage use of RES_USE_INET6jca2020-04-251-1/+5
| | | | Suggested by eric@, input from deraadt@, ok deraadt@ eric@
* Fix RES_USE_INET6 descriptionjca2020-04-251-7/+9
| | | | | | | | | | 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@
* Remove AUTHORS section. This follows what is done in strstr.3claudio2020-04-161-4/+2
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* Replace the simple memmem() implementation with a version that is O(n)claudio2020-04-161-47/+167
| | | | | based on code from musl and now similar to our strstr(). OK tb@ millert@
* Resync our strstr.c with the musl version. Removes some debug code andclaudio2020-04-161-11/+3
| | | | | optimizes one statement in two-way string compare. OK tb@ millert@
* "eventually" came and went back in 2004.libressl-v3.1.0martijn2020-03-301-3/+1
| | | | OK schwarze@
* correct Research Unix edition "appeared in" use in HISTORYjsg2020-02-081-3/+3
| | | | | | | | | | | | | | | | | Starting from "Combined Table of Contents" in Doug McIlroy's "A Research UNIX Reader" a table of which edition manuals appeared in. Checked against manuals from bitsavers/TUHS and source from TUHS where available. Ingo points out there are cases where something is included but not documented until a later release. bcd(6) v6 v7 printf(3) v2 v4 abort(3) v5 v6 system(3) v6 v7 fmod(3) v5 v6 ok schwarze@
* delete wasteful ;;deraadt2020-01-221-2/+2
| | | | ok tedu
* Document how to make getopt_long(3) process arguments in order and stopstsp2020-01-131-2/+18
| | | | | at the first non-option argument. I had to read source code to figure it out.
* drand48(3) returns values in [0.0, 1.0).tb2019-12-201-3/+3
| | | | | | From j@bitminer.ca with input from Andras Farkas, deraadt, joerg@netbsd "fix however you feel best!" jmc
* The file passed to realpath(3) must exists, adjust man page to newbluhm2019-12-111-3/+3
| | | | | behavior. noticed by hshoexer@; OK beck@
* gcc3, like clang and unlike our gcc4, doesn't support redirecting builtinsguenther2019-11-251-6/+12
| | | | | | | like mem{set,cpy,move} or __stack_smash_handler using asm() renaming. So treat gcc3 like clang and mark such functions as protected instead. ok ayoma@
* zap trailing whitespace;jmc2019-09-291-3/+3
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* Xr random 4 in a better wayderaadt2019-09-281-3/+5
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* Add comment line saying S is described vaguely on purpose.otto2019-09-141-2/+3
| | | | Prompted by guenther@
* mop up resolver.3 rename; ok deraadtjmc2019-08-305-15/+15
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* mop up for inet_net rename; ok deraadtjmc2019-08-303-9/+9
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* adapt to bitstring(3) renaming, and look at that bit_ffs(3) is the actualderaadt2019-08-301-3/+3
| | | | | name we want to Xr... ok jmc
* Move 4 manual pages from not-a-function filenames to a correct filename,deraadt2019-08-306-16/+16
| | | | | and correct Xr. ok jmc
* correct mispellings of EACCES; from Kris Katterjohnlibressl-v3.0.0deraadt2019-07-291-3/+3
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* improve verb-tense for explaining the calling convention of __deraadt2019-07-051-3/+3
| | | | ok guenther jmc
* The last consumer of pre-posix realpath behaviour has stoppedderaadt2019-07-051-34/+3
| | | | | | | | requiring it (sftp-server). Remove the /exists///// behaviour from here. The /nonexistant behaviour remains in the kernel and needs to be shot next. There may be ports fallout, but we doubt it. ok beck djm
* snprintf/vsnprintf return < 0 on error, rather than -1.deraadt2019-07-031-2/+2
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* tweak previous; ok guentherjmc2019-06-301-5/+6
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* Document that getcwd() and realpath() are built on system calls thatguenther2019-06-291-2/+16
| | | | | | | have a different calling convention than the standard function...as seen in kdump output. ok deraadt@ schwarze@
* When system calls indicate an error they return -1, not some arbitraryderaadt2019-06-284-12/+12
| | | | | | 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.
* The C89 standard only requires that atexit(3) returns a non-zero valueschwarze2019-06-271-5/+12
| | | | | | on error, so checking for -1 only is potentially non-portable. Also mention that the C89 standard does not require errno to be set. OK deraadt@ millert@
* sockatmark(3), recv(2), getsockopt(2), and connect(2) return specificallyderaadt2019-06-201-4/+4
| | | | | -1 to mark failure, not arbitrary values < 0. I believe manual pages should follow the described contract precisely and accurately.
* Remove old realpath(3), and the userland-vs-kernel realpath verificationderaadt2019-06-171-334/+44
| | | | | | | | code. We now user the simple userland wrapper on top of __realpath(2). The non-POSIX behaviour still remains, that is the next component to fix. From a diff by beck, but I managed to chainsaw it a bit further. Tested in snaps for a couple of days. ok beck
* oops - missing .El in previous;jmc2019-06-151-1/+2
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* realpath(3) doesn't use lstat(2), readlink(2), or getcwd(3) anymore,deraadt2019-06-151-21/+39
| | | | | | it is a thin wrapper over the syscall __readlink(2). Improve the list of possible errors. ok millert beck jmc
* Complete the ld.so boot cleanup: move most libc initialization fromguenther2019-06-022-8/+5
| | | | | | | | | | | | | | | | | _csu_finish() to _libc_preinit(), which is an .init_array function in shared libc (and mark it INITFIRST) or a .preinit_array function in static libc, grabbing the _dl_cb callback there from ld.so. Then in _csu_finish(), invoke the dl_clean_boot() callback to free ld.so's startup bits before main() gets control. Other cleanups this permits: - move various startup structures into .data.rel.ro - the dl* stubs in libc can be strong and call the callbacks provided via _dl_cb - no longer need to conditionalize dlctl() calls on presence of _DYNAMIC original concept and full diff ok kettenis@ ok deraadt@
* __realpath(2) appears to have improved, so re-enable the code thatderaadt2019-05-301-3/+136
| | | | | checks userland-parsing vs kernel parsing, we are hoping to spot another bug..
* There are some bugs in __realpath(2) -- it isn't quite ready so disablederaadt2019-05-291-136/+3
| | | | calling it until those are fixed.
* Enable the use of the kernel __realpath() system call in the libc wrapper.beck2019-05-281-3/+136
| | | | | | | | For now, this also still uses the existing realpath implmentation and emits a syslog if we see differening results. Once we have run with that for a little while we will remove the old code ok deraadt@
* Only override size of chunk if we're not given the actual length.otto2019-05-231-2/+3
| | | | Fixes malloc_conceal...freezero with malloc options C and/or G.
* clarify that later flags modify earlier flags;schwarze2019-05-191-2/+4
| | | | | triggered by a question from Jan Stary <hans at stare dot cz> on misc@; OK otto@
* More consistently put remarks about the less useful LC_* categoties,schwarze2019-05-162-14/+26
| | | | | | i.e. those other than LC_CTYPE, into the CAVEATS section, and standardize wording somewhat. OK jmc@
* delete two stray blank linesschwarze2019-05-151-4/+2
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* Move 'how this works' details from namespace.h to DETAILSguenther2019-05-132-112/+136
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* explicitly mention that RES_NOALIASES has no effect;schwarze2019-05-131-3/+4
| | | | | jmc@ noticed that the text wasn't completely clear; OK jmc@
* Mention introduction of *_conceal.otto2019-05-131-2/+8
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* Inroduce malloc_conceal() and calloc_conceal(). Similar to theirotto2019-05-102-199/+219
| | | | | counterparts but return memory in pages marked MAP_CONCEAL and on free() freezero() is actually called.
* In the incredibly unbelievable circumstance where _rs_init() fails toderaadt2019-03-241-2/+2
| | | | | | | | | allocate pages, don't call abort() because of corefile data leakage concerns, but simply _exit(). The reasoning is _rs_init() will only fail if someone finds a way to apply specific pressure against this failure point, for the purpose of leaking information into a core which they can read. We don't need a corefile in this instance to debug that. So take this "lever" away from whoever in the future wants to do that.
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