Messages in this thread | | | From | Denis Vlasenko <> | Subject | Re: Feature request: exec self for NOMMU. | Date | Thu, 28 Dec 2006 03:48:16 +0100 |
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On Wednesday 27 December 2006 22:03, Rob Landley wrote: > 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.
Yes Rob, I know it can be done like this. But we don't want this. In the tar example, we want :
'Run my own binary again, with parameters: "zcat" "a.tar.gz", even if there is no [/usr][/local]/bin/zcat -> busybox link anywhere'
We do not want to _search for_ zcat. We want to reexec our own binary. -- vda - 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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