Re: finding datadir from executable

[Andreas Schwab]

Ralph Corderoy <address@hidden> writes:

> I wasn't clear.  I realise it isn't always an absolute path, and is
> normally whatever's passed to execve(2).  I was just trying to point out
> that some old Unixes, Xenix? -- I can't remember, effectively strip any
> path, absolute or relative, from execve's argument before it turns up in
> argv[0], i.e. execve("./ls", ...) and execve("/bin/ls", ...) both

The first argument of execve is irrelevant for argv[0].  The argv array
(including argv[0]) is completely passed in by the caller, which can set
it any way it likes.  What you have seen might be the effect of a
misbehaving shell.  Usually argv[0] is the command name before looking it
up in $PATH.

Andreas.

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Andreas Schwab, SuSE Labs, address@hidden
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