60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package internal
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import (
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"fmt"
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"os"
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"path"
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"strconv"
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"sync"
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"git.ophivana.moe/cat/fortify/internal/verbose"
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)
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// state that remain constant for the lifetime of the process
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// fetched and cached here
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const (
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xdgRuntimeDir = "XDG_RUNTIME_DIR"
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)
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// SystemConstants contains state from the operating system
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type SystemConstants struct {
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// path to shared directory e.g. /tmp/fortify.%d
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SharePath string `json:"share_path"`
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// XDG_RUNTIME_DIR value e.g. /run/user/%d
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RuntimePath string `json:"runtime_path"`
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// application runtime directory e.g. /run/user/%d/fortify
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RunDirPath string `json:"run_dir_path"`
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}
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var (
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scVal SystemConstants
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scOnce sync.Once
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)
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func copySC() {
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sc := SystemConstants{
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SharePath: path.Join(os.TempDir(), "fortify."+strconv.Itoa(os.Geteuid())),
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}
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verbose.Println("process share directory at", sc.SharePath)
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// runtimePath, runDirPath
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if r, ok := os.LookupEnv(xdgRuntimeDir); !ok {
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fmt.Println("Env variable", xdgRuntimeDir, "unset")
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os.Exit(1)
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} else {
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sc.RuntimePath = r
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sc.RunDirPath = path.Join(sc.RuntimePath, "fortify")
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verbose.Println("XDG runtime directory at", sc.RunDirPath)
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}
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scVal = sc
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}
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// GetSC returns a populated SystemConstants value
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func GetSC() SystemConstants {
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scOnce.Do(copySC)
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return scVal
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}
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