How to deal with 'No such file or directory' in os.Stat

php editor Zimo brings you a guide on how to deal with the "no such file or directory" problem in os.Stat. os.Stat is a function used to obtain file or directory information, but sometimes when we try to obtain information about a non-existent file or directory, we will encounter the error "No such file or directory". In this article, we'll cover a few ways to deal with this problem to help you better handle this situation. Whether you are a beginner or an experienced developer, this article will provide you with useful solutions. Let’s take a look!

Question content

I have a piece of code that is looking for stat a file and if the file does not exist, returns some default values. That is, this code looks like this:

fileInfo, err := os.Stat(absolutePath)
if err != nil {
    if os.IsNotExist(err) {
        return <default val>, nil
    }
    return nil, fmt.Errorf(...)
}

To "catch" "file does not exist" errors, I read that it is recommended to use os.isnotexist to check if the error indicates that the file does not exist. However, os.isnotexist does not catch this error because the platform returns open <blah>: No such file or directory</blah>. I could add my own error handling here, but is there an idiomatic way to handle "file does not exist" errors in os calls? os.isnotexist The error checked for handling appears to be just a special case of a potential "file does not exist" error.

Workaround

If you read the documentation you will see the following:

func isnotexist

func IsNotExist(err error) bool

isnotexist Returns a Boolean value indicating whether the error is known Reports that the file or directory does not exist. contented errnotexist and some syscall errors.

This function precedes the error. It only supports errors returned by the os package. New code should use errors.is(err, fs.errnotexist). [emphasize. mine]

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