give read-only access to /dev for ffmpeg to access /dev/urandom (#3109)
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@ -119,7 +119,8 @@ func ffmpeg(ctx context.Context, dirpath string, args ...string) error {
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Stderr: &stderr,
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Args: args,
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Config: func(modcfg wazero.ModuleConfig) wazero.ModuleConfig {
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fscfg := wazero.NewFSConfig()
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fscfg := wazero.NewFSConfig() // needs /dev/urandom
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fscfg = fscfg.WithReadOnlyDirMount("/dev", "/dev")
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fscfg = fscfg.WithDirMount(dirpath, dirpath)
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modcfg = modcfg.WithFSConfig(fscfg)
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return modcfg
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