29 lines
673 B
Bash
Executable file
29 lines
673 B
Bash
Executable file
#!/bin/sh
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# script-friendly df
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factor=1024 # for the default (GiB); use -H for GB
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optstring="H"
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while getopts "$optstring" opt; do
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case $opt in
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h) factor=1024 ;; # default (GiB)
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H) factor=1000 ;; # decimal (GB)
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esac
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done
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shift $((OPTIND-1))
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target=${1:-.}
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if free_bytes=$(stat -f --format="%a*%S" "$target" 2>/dev/null); then
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# GNU stat (Linux)
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:
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elif free_bytes=$(stat -f "%a*%S" "$target" 2>/dev/null); then
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# BSD/macOS stat
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:
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else
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# BusyBox stat fallback
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free_bytes=$(stat -f "$target" | awk '/Block size:/ {bs=$3} /Available:/ {av=$2} END {print av*bs}')
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fi
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free_gb=$((free_bytes / factor / factor / factor))
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echo "$free_gb"
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