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ulimit.go
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/
ulimit.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package ulimit
import (
"context"
"fmt"
"syscall"
"namespacelabs.dev/foundation/internal/console"
)
func SetFileLimit(ctx context.Context, n uint64) {
if err := setFileLimit(n); err != nil {
fmt.Fprintf(console.Debug(ctx), "Failed to set ulimit on number of open files to %d: %v\n", n, err)
}
}
func setFileLimit(n uint64) error {
var rlimit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
return err
}
// Already running with a limit that meets the requested number.
if rlimit.Cur >= n {
return nil
}
newLimit := syscall.Rlimit{Cur: n, Max: n}
if err := syscall.Setrlimit(syscall.RLIMIT_NOFILE, &newLimit); err != nil {
return err
}
return nil
}