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Finding out user limits in Go
package main
import (
func main() {
r := syscall.Rlimit{}
syscall.Getrlimit(syscall.RLIMIT_NOFILE, &r)
fmt.Println("Open file current:", r.Cur)
fmt.Println("Open file maximum:", r.Max)

$ ulimit -n

$ ./limit_test
Open file current: 2560
Open file maximum: 9223372036854775807

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