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34 lines
728 B
Go
34 lines
728 B
Go
// +build !windows
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package utils
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import (
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"io/ioutil"
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"strconv"
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"syscall"
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)
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func CloseExecFrom(minFd int) error {
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fdList, err := ioutil.ReadDir("/proc/self/fd")
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if err != nil {
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return err
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}
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for _, fi := range fdList {
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fd, err := strconv.Atoi(fi.Name())
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if err != nil {
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// ignore non-numeric file names
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continue
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}
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if fd < minFd {
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// ignore descriptors lower than our specified minimum
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continue
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}
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// intentionally ignore errors from syscall.CloseOnExec
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syscall.CloseOnExec(fd)
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// the cases where this might fail are basically file descriptors that have already been closed (including and especially the one that was created when ioutil.ReadDir did the "opendir" syscall)
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}
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return nil
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}
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