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seccomp.sh: Silence stty errors

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When printing list of allowed syscalls the width of terminal is
obtained for nicer output (see commit below). The width is
obtained by running 'stty'. While this works when building from a
console, it doesn't work during rpmbuild/emerge/.. as stdout is
usually not a console but a logfile and stdin is usually
/dev/null or something. This results in stty reporting errors
like this:

  stty: 'standard input': Inappropriate ioctl for device

Redirect stty's stderr to /dev/null to silence it.

Fixes: 712ca3235329 ("seccomp.sh: Try to account for terminal width while formatting list of system calls")
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Michal Privoznik 2025-02-21 12:53:13 +01:00 committed by Stefano Brivio
parent ea69ca6a20
commit be86232f72
1 changed files with 1 additions and 1 deletions
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seccomp.sh
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@ -255,7 +255,7 @@ for __p in ${__profiles}; do
__calls="${__calls} ${EXTRA_SYSCALLS:-}"
__calls="$(filter ${__calls})"
cols="$(stty -a | sed -n 's/.*columns \([0-9]*\).*/\1/p' || :)" 2>/dev/null
cols="$(stty -a 2>/dev/null | sed -n 's/.*columns \([0-9]*\).*/\1/p' || :)" 2>/dev/null
case $cols in [0-9]*) col_args="-w ${cols}";; *) col_args="";; esac
echo "seccomp profile ${__p} allows: ${__calls}" | tr '\n' ' ' | fmt -t ${col_args}