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handle empty bus_num #17

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handle empty bus_num #17

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11e52e0
handle empty bus_num
adzierzanowski Aug 7, 2021
4dc47b7
stderr > devnull
adzierzanowski Aug 7, 2021
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12 changes: 8 additions & 4 deletions lsusb
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
#
# Disclaimer: usage info and functionality from lsusb under Linux

verbose () { system_profiler SPUSBDataType; }
verbose () { system_profiler SPUSBDataType 2>/dev/null; }
version () { echo "lsusb for Mac OS X 007"; }
help () {
cat >&2 <<EOM
Expand Down Expand Up @@ -85,9 +85,13 @@ parse () {
esac
fi

# Convert bus number from hexadecimal to decimal.
bus_num=`echo "$((16#$bus_num))"`
bus_num=`printf "%0*d" 3 "$bus_num"`
if [ ${#bus_num} -ne 0 ]; then
# Convert bus number from hexadecimal to decimal.
bus_num=`echo "$((16#$bus_num))"`
bus_num=`printf "%0*d" 3 "$bus_num"`
else
bus_num='---'
fi

# Strip the parentheses from manufacturer name unless so specified.
if [ -z "$parens" ]; then
Expand Down