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14 lines
277 B
Bash
14 lines
277 B
Bash
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#!/bin/sh
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prefix=$1
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for tty in tty0 ttyS0 ttyAMA0; do
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dev_tty=/dev/$tty
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if [ -e $dev_tty ] && echo >$dev_tty 2>/dev/null; then
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if [ -z "$str" ]; then
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str="$prefix$tty"
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else
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str="$str $prefix$tty"
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fi
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fi
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done
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echo $str
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