[cs631apue] Get path to currently running executable

[Keyur Ved]

Hi all,

I had one question about how to set the SHELL environment variable
correctly. I found a thread that says to use /proc/self/exe to get the path
of the currently running executable since it's a link to the currently
running executable. Is that a portable way to get the path?

The only other way I can think of is to resolve argv[0], but that isn't
always the correct executable name (as we saw in class).

Thanks,
Keyur
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