github.com/mtsmfm/go/src@v0.0.0-20221020090648-44bdcb9f8fde/os/rlimit_darwin.go (about)

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build darwin
     6  
     7  package os
     8  
     9  import "syscall"
    10  
    11  // adjustFileLimit adds per-OS limitations on the Rlimit used for RLIMIT_NOFILE. See rlimit.go.
    12  func adjustFileLimit(lim *syscall.Rlimit) {
    13  	// On older macOS, setrlimit(RLIMIT_NOFILE, lim) with lim.Cur = infinity fails.
    14  	// Set to the value of kern.maxfilesperproc instead.
    15  	n, err := syscall.SysctlUint32("kern.maxfilesperproc")
    16  	if err != nil {
    17  		return
    18  	}
    19  	if lim.Cur > uint64(n) {
    20  		lim.Cur = uint64(n)
    21  	}
    22  }