Suppose you run the application 'app' by typing 'app', rather than its absolute path. Due to your $PATH variable, what actually runs is /foo/bar/app. From inside app I'd like to determine /foo/bar/app. argv[0] is just 'app', so that doesn't help. Suppose you run the application 'app' by typing
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Linux/*nix中正在运行的应用程序如何确定自己的绝对路径?
来源：互联网
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