Messages in this thread | | | From | Rob Landley <> | Subject | Re: Feature request: exec self for NOMMU. | Date | Wed, 27 Dec 2006 16:03:38 -0500 |
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On Wednesday 27 December 2006 1:35 pm, Denis Vlasenko wrote: > This solves chroot problem. How to find path-to-yourself reliably > (for one, without using /proc/self/exe) is not obvious to me.
Been there, done that. Both my toybox and Firmware Linux projects do this. In FWL it's line 115 of this file: http://landley.net/hg/firmware?f=937346748ff4;file=sources/toys/gcc-uClibc.c
It's essentially the logic of the command line "which" utility applied to argv[0]. If argv[0] has a relative or absolute path, then it's vs cwd (this has to happen when you first run the program, before you cd). If argv[0] has no path then look at $PATH.
Rob -- "Perfection is reached, not when there is no longer anything to add, but when there is no longer anything to take away." - Antoine de Saint-Exupery - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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