返回内容存在$?, 0代表成功,其他代表失败
some_command if [ $? -eq 0 ]; then echo OK else echo FAIL fi
字符型的返回值
some_command retval=$? do_something $retval if [ $retval -ne 0 ]; then echo "Return code was not zero but $retval" fi
返回内容存在$?, 0代表成功,其他代表失败
some_command if [ $? -eq 0 ]; then echo OK else echo FAIL fi
字符型的返回值
some_command retval=$? do_something $retval if [ $retval -ne 0 ]; then echo "Return code was not zero but $retval" fi