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Re: [PATCH] linux-user: manage binfmt-misc preserve-arg[0] flag

From: Michael Tokarev
Subject: Re: [PATCH] linux-user: manage binfmt-misc preserve-arg[0] flag
Date: Mon, 22 Feb 2021 17:45:12 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1

22.02.2021 13:50, Laurent Vivier wrote:
Add --preserve-argv0 in qemu-binfmt-conf.sh to configure the preserve-argv0

This patch allows to use new flag in AT_FLAGS to detect if
preserve-argv0 is configured for this interpreter:
argv[0] (the full pathname provided by binfmt-misc) is removed and
replaced by argv[1] (the original argv[0] provided by binfmt-misc when
'P'/preserve-arg[0] is set)

A few days ago I sent an RFC patch which fixes this issue without kernel
patch, by registering special binary name in binfmt (note: that patch had
argv[1] & argv[2] swapped by mistake).

Here it is: https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg04639.html


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