MQ Ksh Shell脚本-陷阱错误

Question

我有如下的ksh脚本。

if [ `uname` == "AIX" ]; then
    export LIBPATH_BKP_$$=$LIBPATH
    # Trap so that it will return the original library path when script exits
    trap 1 2 3 9 15 "export LIBPATH=$LIBPATH_BKP_$$; unset LIBPATH_BKP_$$"
    export LIBPATH=/usr/mqm/lib:$LIBPATH
else # All else will be either Linux or Solaris which uses LD_LIBRARY_PATH
    export LD_LIBRARY_PATH_BKP_$$=$LD_LIBRARY_PATH
    # Trap so that it will return the original library path when script exits
    trap 1 2 3 9 15 "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH_BKP_$$; unset LD_LIBRARY_PATH_BKP_$$"
    export LD_LIBRARY_PATH=/usr/mqm/lib:$LD_LIBRARY_PATH_BKP_$$
fi

当我执行它说

tdestop.ksh [52]：陷阱：export LD_LIBRARY_PATH = 49648; 未设置LD_LIBRARY_PATH_BKP_49648：错误陷阱

tdestop.ksh-是脚本名称及其第52行的错误提示。

问题是什么是陷阱？ 这是怎么了？ 我不是这方面的专家。 抱歉，这个问题真的是新手。

谢谢，Dwija

Answer 1

语法为：

trap action signals...

例如

trap 'echo "I caught something"' HUP INT TERM

您已经翻转了动作和信号的顺序，这就是ksh抱怨的原因。 您应该改为使用：

trap "export LIBPATH=$LIBPATH_BKP_$$; unset LIBPATH_BKP_$$" 1 2 3 9 15