24 lines
610 B
Go
24 lines
610 B
Go
package syscallcompat
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import (
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"golang.org/x/sys/unix"
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)
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// Readlinkat exists both in Linux and in MacOS 10.10+. We may add an
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// emulated version for users on older MacOS versions if there is
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// demand.
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// Buffer allocation is handled internally, unlike the bare unix.Readlinkat.
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func Readlinkat(dirfd int, path string) (string, error) {
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// Allocate the buffer exponentially like os.Readlink does.
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for bufsz := 128; ; bufsz *= 2 {
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buf := make([]byte, bufsz)
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n, err := unix.Readlinkat(dirfd, path, buf)
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if err != nil {
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return "", err
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}
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if n < bufsz {
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return string(buf[0:n]), nil
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}
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}
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}
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