（变量除以数字）以浮点数打印 - Bash [错误数字]

Question

这是我的一段代码

if [ $totalavg -gt 1000000 ]; then
    printf "%0.1f MB/s (average)\n" $(echo "scale=1; $totalavg/100000" | bc)
elif [ $totalavg -gt 1000 ]; then
    printf "%0.1f KB/s (average)\n" $(echo "scale=1; $totalavg/1000" | bc)
else
    printf "%i B/s (average)\n" "$totalavg"
fi

totalavg 变量是从 /proc/ 文件中获取的整数。直到整数大于 1000 才能到达 if 语句之一，结果证明

./script.sh: row (with second if above 1000): printf: 1.7: wrong number

我已经浪费了 2 个小时的时间来解决这个超级基本的可笑问题。但我无法修复它，我不知道发生了什么。

Answer 1

我从字面上复制了您的脚本，并尝试了以下所有方法，一切都按预期工作。

/tmp> totalavg=500 ./script.sh
500 B/s (average)
/tmp> totalavg=5000 ./script.sh
5.0 KB/s (average)
/tmp> totalavg=50000 ./script.sh
50.0 KB/s (average)
/tmp> totalavg=5000000 ./script.sh
50.0 MB/s (average)
/tmp> totalavg=50000000 ./script.sh
500.0 MB/s (average)
/tmp> totalavg=1000 ./script.sh
1000 B/s (average)
/tmp> totalavg=1001 ./script.sh
1.0 KB/s (average)
/tmp> totalavg=999 ./script.sh
999 B/s (average)
/tmp> totalavg=999999 ./script.sh
999.9 KB/s (average)
/tmp> totalavg=1000000 ./script.sh
1000.0 KB/s (average)
/tmp> totalavg=1000001 ./script.sh
10.0 MB/s (average)

/tmp> cat script.sh
#!/bin/bash

if [ $totalavg -gt 1000000 ]; then
    printf "%0.1f MB/s (average)\n" $(echo "scale=1; $totalavg/100000" | bc)
elif [ $totalavg -gt 1000 ]; then
    printf "%0.1f KB/s (average)\n" $(echo "scale=1; $totalavg/1000" | bc)
else
    printf "%i B/s (average)\n" "$totalavg"
fi

您可以尝试将您的脚本复制到其他地方并在那里运行吗？或者您的 $totalavg 环境变量设置不正确。