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galene/limit/limit_unix.go
2021-07-29 14:33:01 +02:00

44 lines
679 B
Go

// +build !windows
// +build !plan9
package limit
import (
"golang.org/x/sys/unix"
)
func Nofile(desired uint64) (uint64, error) {
var old unix.Rlimit
err := unix.Getrlimit(unix.RLIMIT_NOFILE, &old)
if err != nil {
return 0, err
}
if old.Cur >= desired {
return old.Cur, nil
}
if old.Max < desired {
limit := unix.Rlimit{
Cur: desired,
Max: desired,
}
err := unix.Setrlimit(unix.RLIMIT_NOFILE, &limit)
if err == nil {
return limit.Cur, nil
}
desired = old.Max
}
limit := unix.Rlimit{
Cur: desired,
Max: old.Max,
}
err = unix.Setrlimit(unix.RLIMIT_NOFILE, &limit)
if err != nil {
return old.Cur, err
}
return limit.Cur, nil
}