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36 lines
841 B
Go
36 lines
841 B
Go
//go:build !windows
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package ipcauth
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import (
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"fmt"
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"os"
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"syscall"
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)
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// openForRead opens a caller-supplied path without following a symlink at its
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// final component and without blocking: a fifo planted at the path would
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// otherwise stall the open until a writer appears, and the daemon holds a lock
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// while it collects the file.
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func openForRead(path string) (*os.File, error) {
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f, err := os.OpenFile(path, os.O_RDONLY|syscall.O_NOFOLLOW|syscall.O_NONBLOCK, 0)
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if err != nil {
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return nil, fmt.Errorf("open %s: %w", path, err)
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}
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return f, nil
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}
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func fileOwnedBy(id Identity, f *os.File) (bool, error) {
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info, err := f.Stat()
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if err != nil {
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return false, err
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}
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stat, ok := info.Sys().(*syscall.Stat_t)
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if !ok {
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return false, fmt.Errorf("no owner information in %T", info.Sys())
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}
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return stat.Uid == id.UID, nil
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}
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