使用bash -c 'some command'
而不是使用bash <<< 'some command'
它们似乎达到了同样的效果。
答案 0 :(得分:6)
bash -c '...'
让您可以选择为命令提供stdin输入,
而bash <<<'...'
排除了该选项,因为stdin已被用于提供执行脚本。
示例:
# Executes the `ls` command then processes stdin input via `cat`
echo hi | bash -c 'ls -d /; cat -n'
/
1 hi
# The here-string input takes precedence and pipeline input is ignored.
# The `ls` command executes as expected, but `cat` has nothing to read,
# since all stdin input (from the here-string) has already been consumed.
echo hi | bash <<<'ls -d /; cat -n'
/