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From: Cristian Morales Vega <christian.morales.vega@gmail.com>
Date: Thu, 14 May 2020 10:24:46 +0100
Message-ID: <CAOWQn3Tnuar_fbW8EVSFzdXgN_oDiyY1Yvzyy8fWs3ECKC_3jA@mail.gmail.com>
To: musl@lists.openwall.com
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Subject: [musl] Possible problem with getopt_long_only()

I have not looked at the details. But killall from psmisc fails to
parse "killall -10 <cmd>" when using musl 1.1.24 (the one used by the
latest OpenWrt release, according to
https://git.musl-libc.org/cgit/musl/log/src/misc/getopt_long.c the
file has not been changed since 2018-09-12 anyway).

In https://gitlab.com/psmisc/psmisc/-/blob/v23.3/src/killall.c#L989
optind is "1" if "killall -10 <cmd>" was used, but 2 if "killall -9
<cmd>". So whether the signal number is only one digit or more makes
the optind change. So killall only works with <10 signals.

Not sure it's the same issue, but in case it's different and was never
reported to you you may be interested also on
https://github.com/JuliaLang/julia/pull/31946.