// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build unix && !darwin

package syscall

// adjustFileLimit adds per-OS limitations on the Rlimit used for RLIMIT_NOFILE. See rlimit.go.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin

package syscall

// adjustFileLimit adds per-OS limitations on the Rlimit used for RLIMIT_NOFILE. See rlimit.go.
func adjustFileLimit(lim *Rlimit) {
	// On older macOS, setrlimit(RLIMIT_NOFILE, lim) with lim.Cur = infinity fails.
	// Set to the value of kern.maxfilesperproc instead.

func init() {
	var lim Rlimit
	if err := Getrlimit(RLIMIT_NOFILE, &lim); err == nil && lim.Cur != lim.Max {
		origRlimitNofile.Store(&lim)
		nlim := lim
		nlim.Cur = nlim.Max
		adjustFileLimit(&nlim)
		setrlimit(RLIMIT_NOFILE, &nlim)
	}
}

func Setrlimit(resource int, rlim *Rlimit) error {
	if resource == RLIMIT_NOFILE {
		// Store nil in origRlimitNofile to tell StartProcess