[问题求助] 求助Shell脚本异常问题set +e， trap - ERR

GNGW

set +e
trap - ERR
yum list installed coreutils 2> /dev/null | grep -q coreutils &> /dev/null
set -e
trap 'echo "An error occurred with command: $BASH_COMMAND at line $LINENO"; exit 1' ERRCOPY

这样用就正常

capture_exit_code (){
	set -e
	trap 'echo "An error occurred with command: $BASH_COMMAND at line $LINENO"; exit 1' ERR
}
turn_off_capture_exit_code (){
	echo "成功关闭捕获错误码"
	set +e;
	trap - ERR;
}
capture_exit_code
turn_off_capture_exit_code
yum list installed coreutils 2> /dev/null | grep -q coreutils &> /dev/null
capture_exit_codeCOPY

这样用yum list installed coreutils 2> /dev/null | grep -q coreutils &> /dev/null命令还是被捕获退出码
求助，为什么？

GNGW

回复 2# Five66


    yum list installed coreutils 2> /dev/null | grep -q coreutils &> /dev/null 我找到了，问题出在这一行了。但是我想把yum list installed coreutils 2> /dev/null 通过管道符 | 之后的内容输出来应该怎样做？