diff options
Diffstat (limited to 'vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go')
| -rw-r--r-- | vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go | 296 |
1 files changed, 296 insertions, 0 deletions
diff --git a/vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go b/vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go new file mode 100644 index 0000000..3f5d83f --- /dev/null +++ b/vendor/github.com/tklauser/go-sysconf/sysconf_darwin.go @@ -0,0 +1,296 @@ +// Copyright 2018 Tobias Klauser. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sysconf + +import ( + "strconv" + "strings" + "sync" + + "golang.org/x/sys/unix" +) + +const ( + _HOST_NAME_MAX = _MAXHOSTNAMELEN - 1 + _LOGIN_NAME_MAX = _MAXLOGNAME + _SYMLOOP_MAX = _MAXSYMLINKS +) + +var uname struct { + sync.Once + macOSMajor int +} + +// sysconf implements sysconf(4) as in the Darwin libc (derived from the FreeBSD +// libc), version 1534.81.1. +// See https://github.com/apple-oss-distributions/Libc/tree/Libc-1534.81.1. +func sysconf(name int) (int64, error) { + switch name { + case SC_AIO_LISTIO_MAX: + fallthrough + case SC_AIO_MAX: + return sysctl32("kern.aiomax"), nil + case SC_AIO_PRIO_DELTA_MAX: + return -1, nil + case SC_ARG_MAX: + return sysctl32("kern.argmax"), nil + case SC_ATEXIT_MAX: + return _INT_MAX, nil + case SC_CHILD_MAX: + var rlim unix.Rlimit + if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlim); err == nil { + if rlim.Cur != unix.RLIM_INFINITY { + return int64(rlim.Cur), nil + } + } + return -1, nil + case SC_CLK_TCK: + return _CLK_TCK, nil + case SC_DELAYTIMER_MAX: + return -1, nil + case SC_GETGR_R_SIZE_MAX: + return 4096, nil + case SC_GETPW_R_SIZE_MAX: + return 4096, nil + case SC_IOV_MAX: + return _IOV_MAX, nil + case SC_MQ_OPEN_MAX: + return -1, nil + case SC_MQ_PRIO_MAX: + return -1, nil + case SC_NGROUPS_MAX: + return sysctl32("kern.ngroups"), nil + case SC_OPEN_MAX, SC_STREAM_MAX: + var rlim unix.Rlimit + if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlim); err != nil { + return -1, nil + } + if rlim.Cur > unix.RLIM_INFINITY { + return -1, nil + } + if rlim.Cur > _LONG_MAX { + return -1, unix.EOVERFLOW + } + return int64(rlim.Cur), nil + case SC_RTSIG_MAX: + return -1, nil + case SC_SEM_NSEMS_MAX: + return sysctl32("kern.sysv.semmns"), nil + case SC_SEM_VALUE_MAX: + return _POSIX_SEM_VALUE_MAX, nil + case SC_SIGQUEUE_MAX: + return -1, nil + case SC_THREAD_DESTRUCTOR_ITERATIONS: + return _PTHREAD_DESTRUCTOR_ITERATIONS, nil + case SC_THREAD_KEYS_MAX: + return _PTHREAD_KEYS_MAX, nil + case SC_THREAD_PRIO_INHERIT: + return _POSIX_THREAD_PRIO_INHERIT, nil + case SC_THREAD_PRIO_PROTECT: + return _POSIX_THREAD_PRIO_PROTECT, nil + case SC_THREAD_STACK_MIN: + return _PTHREAD_STACK_MIN, nil + case SC_THREAD_THREADS_MAX: + return -1, nil + case SC_TIMER_MAX: + return -1, nil + case SC_TTY_NAME_MAX: + // should be _PATH_DEV instead of "/" + return pathconf("/", _PC_NAME_MAX), nil + case SC_TZNAME_MAX: + return pathconf(_PATH_ZONEINFO, _PC_NAME_MAX), nil + + case SC_IPV6: + if _POSIX_IPV6 == 0 { + fd, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0) + if err == nil && fd >= 0 { + unix.Close(fd) + return int64(200112), nil + } + return 0, nil + } + return _POSIX_IPV6, nil + case SC_MESSAGE_PASSING: + if _POSIX_MESSAGE_PASSING == 0 { + return yesno(sysctl32("p1003_1b.message_passing")), nil + } + return _POSIX_MESSAGE_PASSING, nil + case SC_PRIORITIZED_IO: + if _POSIX_PRIORITIZED_IO == 0 { + return yesno(sysctl32("p1003_1b.prioritized_io")), nil + } + return _POSIX_PRIORITIZED_IO, nil + case SC_PRIORITY_SCHEDULING: + if _POSIX_PRIORITY_SCHEDULING == 0 { + return yesno(sysctl32("p1003_1b.priority_scheduling")), nil + } + return _POSIX_PRIORITY_SCHEDULING, nil + case SC_REALTIME_SIGNALS: + if _POSIX_REALTIME_SIGNALS == 0 { + return yesno(sysctl32("p1003_1b.realtime_signals")), nil + } + return _POSIX_REALTIME_SIGNALS, nil + case SC_SAVED_IDS: + return yesno(sysctl32("kern.saved_ids")), nil + case SC_SEMAPHORES: + if _POSIX_SEMAPHORES == 0 { + return yesno(sysctl32("p1003_1b.semaphores")), nil + } + return _POSIX_SEMAPHORES, nil + case SC_SPAWN: + uname.Once.Do(func() { + var u unix.Utsname + err := unix.Uname(&u) + if err != nil { + return + } + rel := unix.ByteSliceToString(u.Release[:]) + ver := strings.Split(rel, ".") + maj, _ := strconv.Atoi(ver[0]) + uname.macOSMajor = maj + }) + if uname.macOSMajor < 22 { + return -1, nil + } + // macOS 13 (Ventura) and later + return 200112, nil + case SC_SPIN_LOCKS: + return _POSIX_SPIN_LOCKS, nil + case SC_SPORADIC_SERVER: + return _POSIX_SPORADIC_SERVER, nil + case SC_SS_REPL_MAX: + return _POSIX_SS_REPL_MAX, nil + case SC_SYNCHRONIZED_IO: + if _POSIX_SYNCHRONIZED_IO == 0 { + return yesno(sysctl32("p1003_1b.synchronized_io")), nil + } + return _POSIX_SYNCHRONIZED_IO, nil + case SC_THREAD_ATTR_STACKADDR: + return _POSIX_THREAD_ATTR_STACKADDR, nil + case SC_THREAD_ATTR_STACKSIZE: + return _POSIX_THREAD_ATTR_STACKSIZE, nil + case SC_THREAD_CPUTIME: + return _POSIX_THREAD_CPUTIME, nil + case SC_THREAD_PRIORITY_SCHEDULING: + return _POSIX_THREAD_PRIORITY_SCHEDULING, nil + case SC_THREAD_PROCESS_SHARED: + return _POSIX_THREAD_PROCESS_SHARED, nil + case SC_THREAD_SAFE_FUNCTIONS: + return _POSIX_THREAD_SAFE_FUNCTIONS, nil + case SC_THREAD_SPORADIC_SERVER: + return _POSIX_THREAD_SPORADIC_SERVER, nil + case SC_TIMERS: + if _POSIX_TIMERS == 0 { + return yesno(sysctl32("p1003_1b.timers")), nil + } + return _POSIX_TIMERS, nil + case SC_TRACE: + return _POSIX_TRACE, nil + case SC_TRACE_EVENT_FILTER: + return _POSIX_TRACE_EVENT_FILTER, nil + case SC_TRACE_EVENT_NAME_MAX: + return _POSIX_TRACE_EVENT_NAME_MAX, nil + case SC_TRACE_INHERIT: + return _POSIX_TRACE_INHERIT, nil + case SC_TRACE_LOG: + return _POSIX_TRACE_LOG, nil + case SC_TRACE_NAME_MAX: + return _POSIX_TRACE_NAME_MAX, nil + case SC_TRACE_SYS_MAX: + return _POSIX_TRACE_SYS_MAX, nil + case SC_TRACE_USER_EVENT_MAX: + return _POSIX_TRACE_USER_EVENT_MAX, nil + case SC_TYPED_MEMORY_OBJECTS: + return _POSIX_TYPED_MEMORY_OBJECTS, nil + case SC_VERSION: + // TODO(tk): darwin libc uses sysctl(CTL_KERN, KERN_POSIX1) + return _POSIX_VERSION, nil + + case SC_V6_ILP32_OFF32: + if _V6_ILP32_OFF32 == 0 { + if unix.SizeofInt*_CHAR_BIT == 32 && + unix.SizeofInt == unix.SizeofLong && + unix.SizeofLong == unix.SizeofPtr && + unix.SizeofPtr == sizeofOffT { + return 1, nil + } + return -1, nil + } + return _V6_ILP32_OFF32, nil + case SC_V6_ILP32_OFFBIG: + if _V6_ILP32_OFFBIG == 0 { + if unix.SizeofInt*_CHAR_BIT == 32 && + unix.SizeofInt == unix.SizeofLong && + unix.SizeofLong == unix.SizeofPtr && + sizeofOffT*_CHAR_BIT >= 64 { + return 1, nil + } + return -1, nil + } + return _V6_ILP32_OFFBIG, nil + case SC_V6_LP64_OFF64: + if _V6_LP64_OFF64 == 0 { + if unix.SizeofInt*_CHAR_BIT == 32 && + unix.SizeofLong*_CHAR_BIT == 64 && + unix.SizeofLong == unix.SizeofPtr && + unix.SizeofPtr == sizeofOffT { + return 1, nil + } + return -1, nil + } + return _V6_LP64_OFF64, nil + case SC_V6_LPBIG_OFFBIG: + if _V6_LPBIG_OFFBIG == 0 { + if unix.SizeofInt*_CHAR_BIT >= 32 && + unix.SizeofLong*_CHAR_BIT >= 64 && + unix.SizeofPtr*_CHAR_BIT >= 64 && + sizeofOffT*_CHAR_BIT >= 64 { + return 1, nil + } + return -1, nil + } + return _V6_LPBIG_OFFBIG, nil + + case SC_2_CHAR_TERM: + return _POSIX2_CHAR_TERM, nil + case SC_2_PBS, + SC_2_PBS_ACCOUNTING, + SC_2_PBS_CHECKPOINT, + SC_2_PBS_LOCATE, + SC_2_PBS_MESSAGE, + SC_2_PBS_TRACK: + return _POSIX2_PBS, nil + case SC_2_UPE: + return _POSIX2_UPE, nil + + case SC_XOPEN_CRYPT: + return _XOPEN_CRYPT, nil + case SC_XOPEN_ENH_I18N: + return _XOPEN_ENH_I18N, nil + case SC_XOPEN_REALTIME: + return _XOPEN_REALTIME, nil + case SC_XOPEN_REALTIME_THREADS: + return _XOPEN_REALTIME_THREADS, nil + case SC_XOPEN_SHM: + return _XOPEN_SHM, nil + case SC_XOPEN_STREAMS: + return -1, nil + case SC_XOPEN_UNIX: + return _XOPEN_UNIX, nil + case SC_XOPEN_VERSION: + return _XOPEN_VERSION, nil + case SC_XOPEN_XCU_VERSION: + return _XOPEN_XCU_VERSION, nil + + case SC_PHYS_PAGES: + return sysctl64("hw.memsize") / int64(unix.Getpagesize()), nil + case SC_NPROCESSORS_CONF: + fallthrough + case SC_NPROCESSORS_ONLN: + return sysctl32("hw.ncpu"), nil + } + + return sysconfGeneric(name) +} |