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https://github.com/jart/cosmopolitan.git
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d1d4388201
It hasn't been helpful enough to be justify the maintenance burden. What actually does help is mprotect(), kprintf(), --ftrace and --strace which can always be counted upon to work correctly. We aren't losing much with this change. Support for ASAN on AARCH64 was never implemented. Applying ASAN to the core libc runtimes was disabled many months ago. If there is some way to have an ASAN runtime for user programs that is less invasive we can potentially consider reintroducing support. But now is premature.
188 lines
7.6 KiB
C
188 lines
7.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/utsname-linux.internal.h"
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#include "libc/calls/struct/utsname.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/calls/syscall_support-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/log/log.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/enum/computernameformat.h"
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#include "libc/nt/systeminfo.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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#define CTL_KERN 1
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#define KERN_OSTYPE 1
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#define KERN_OSRELEASE 2
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#define KERN_VERSION 4
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#define KERN_HOSTNAME 10
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#define KERN_DOMAINNAME 22
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#define CTL_HW 6
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#define HW_MACHINE 1
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#define COSMOPOLITAN_VERSION_STR__(x, y, z) #x "." #y "." #z
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#define COSMOPOLITAN_VERSION_STR_(x, y, z) COSMOPOLITAN_VERSION_STR__(x, y, z)
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#define COSMOPOLITAN_VERSION_STR \
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COSMOPOLITAN_VERSION_STR_(__COSMOPOLITAN_MAJOR__, __COSMOPOLITAN_MINOR__, \
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__COSMOPOLITAN_PATCH__)
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// Gets BSD sysctl() string, guaranteeing NUL-terminator.
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// We ignore errors since this syscall mutates on ENOMEM.
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// In that case, sysctl() doesn't guarantee the nul term.
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static void GetBsdStr(int c0, int c1, char *s) {
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char *p;
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int e = errno;
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size_t n = SYS_NMLN;
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int cmd[2] = {c0, c1};
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bzero(s, n), --n;
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sysctl(cmd, 2, s, &n, NULL, 0);
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errno = e;
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// sysctl kern.version is too verbose for uname
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if ((p = strchr(s, '\n'))) {
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*p = 0;
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}
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}
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// Gets NT name ignoring errors with guaranteed NUL-terminator.
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static textwindows void GetNtName(char *name, int kind) {
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char16_t name16[256];
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uint32_t size = ARRAYLEN(name16);
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if (GetComputerNameEx(kind, name16, &size)) {
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tprecode16to8(name, SYS_NMLN, name16);
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} else {
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name[0] = 0;
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}
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}
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static textwindows void GetNtVersion(char *p) {
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// We could ask GetVersionExW() for this information, but it'll simply
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// report what we put in the MajorOperatingSystemVersion of the PE ape
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// header fields. Windows doesn't want us detecting versions it seems.
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// Chances are they bake all old versions of Windows into Windows, and
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// run us on the intended one, like some kind of Docker container. Heh
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strcpy(p, "10.0");
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}
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static const char *Str(int rc, const char *s) {
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return !rc ? s : "n/a";
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}
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/**
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* Asks kernel to give us `uname -a` data.
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*
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* - `machine` should be one of:
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* - `x86_64`
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* - `amd64`
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*
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* - `sysname` should be one of:
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* - `Linux`
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* - `FreeBSD`
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* - `NetBSD`
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* - `OpenBSD`
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* - `Darwin`
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* - `Windows`
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*
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* - `version` contains the distro name, version, and release date. On
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* FreeBSD/NetBSD/OpenBSD this may contain newline characters, which
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* this polyfill hides by setting the first newline character to nul
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* although the information can be restored by putting newline back.
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* BSDs usually repeat the `sysname` and `release` in the `version`.
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*
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* - `nodename` *may* be the first label of the fully qualified hostname
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* of the current host. This is equivalent to gethostname(), except we
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* guarantee a NUL-terminator here with truncation, which should never
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* happen unless the machine violates the DNS standard. If it has dots
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* then it's fair to assume it's an FQDN. On Linux this is the same as
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* the content of `/proc/sys/kernel/hostname`.
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*
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* - `domainname` *may* be the higher-order labels of the FQDN for this
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* host. This is equivalent to getdomainname(), except we guarantee a
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* NUL-terminator here with truncation, which should never happen w/o
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* violating the DNS standard. If this field is not present, it'll be
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* coerced to empty string. On Linux, this is the same as the content
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* of `/proc/sys/kernel/domainname`.
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*
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* The returned fields are guaranteed to be nul-terminated.
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*
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* @return 0 on success, or -1 w/ errno
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* @raise EFAULT if `buf` isn't valid
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* @raise ENOSYS on metal
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*/
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int uname(struct utsname *uts) {
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int rc;
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if (!uts) {
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rc = efault();
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} else if (IsLinux()) {
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struct utsname_linux linux;
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if (!(rc = sys_uname_linux(&linux))) {
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strlcpy(uts->sysname, linux.sysname, SYS_NMLN);
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strlcpy(uts->nodename, linux.nodename, SYS_NMLN);
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strlcpy(uts->release, linux.release, SYS_NMLN);
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strlcpy(uts->version, linux.version, SYS_NMLN);
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strlcpy(uts->machine, linux.machine, SYS_NMLN);
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strlcpy(uts->domainname, linux.domainname, SYS_NMLN);
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if (!strcmp(uts->domainname, "(none)")) {
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uts->domainname[0] = 0;
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}
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}
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} else if (IsBsd()) {
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GetBsdStr(CTL_KERN, KERN_OSTYPE, uts->sysname);
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GetBsdStr(CTL_KERN, KERN_HOSTNAME, uts->nodename);
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GetBsdStr(CTL_KERN, KERN_DOMAINNAME, uts->domainname);
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GetBsdStr(CTL_KERN, KERN_OSRELEASE, uts->release);
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GetBsdStr(CTL_KERN, KERN_VERSION, uts->version);
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GetBsdStr(CTL_HW, HW_MACHINE, uts->machine);
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rc = 0;
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} else if (IsWindows()) {
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stpcpy(uts->sysname, "Windows");
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stpcpy(uts->machine, "x86_64");
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GetNtVersion(uts->release);
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GetNtName(uts->nodename, kNtComputerNamePhysicalDnsHostname);
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GetNtName(uts->domainname, kNtComputerNamePhysicalDnsDomain);
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rc = 0;
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} else {
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rc = enosys();
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}
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if (!rc) {
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char buf[SYS_NMLN];
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stpcpy(buf, "Cosmopolitan " COSMOPOLITAN_VERSION_STR);
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if (*MODE) {
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strlcat(buf, " MODE=" MODE, SYS_NMLN);
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}
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if (*uts->version) {
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strlcat(buf, "; ", SYS_NMLN);
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strlcat(buf, uts->version, SYS_NMLN);
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}
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strlcpy(uts->version, buf, SYS_NMLN);
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}
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STRACE("uname([{%#s, %#s, %#s, %#s, %#s, %#s}]) → %d% m",
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Str(rc, uts->sysname), Str(rc, uts->nodename), Str(rc, uts->release),
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Str(rc, uts->version), Str(rc, uts->machine), Str(rc, uts->domainname),
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rc);
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return rc;
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}
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