shell 中的 奇怪的*号，忘大侠解答

Question

#/bin/sh
user="root"
cmd="/usr/local/mysql-5.1.54/bin/mysql -uroot -p123456 -h192.168.1.124 -e \"select \* from mysql.user user='$user' limit 1\"";
eval $cmd
#---------结果--------------
ERROR at line 1: Unknown command '\*'.

上面的程序在ubuntu 10.04 server 上没有问题，但是在 ubuntu 10.10 和 rs 5上面就有问题。

Answer 1

试试去掉 转移符试试

Answer 2

试试去掉 转移符试试
chenbin200818 发表于 2011-04-12 20:29

# ls
a.sh  bin  mysql.sock  psql.lock  tmp_rs
# ./a.sh
ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'mysql.sock psql.lock tmp_rs from mysql.user user='root' limit 1' at line 1
#
#
#
# sh -x a.sh
+ user=root
+ cmd=/usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e "select * from mysql.user user='root' limit 1"
+ eval /usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e "select a.sh bin mysql.sock psql.lock tmp_rs from mysql.user user='root' limit 1"
+ /usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e select a.sh bin mysql.sock psql.lock tmp_rs from mysql.user user='root' limit 1
ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'mysql.sock psql.lock tmp_rs from mysql.user user='root' limit 1' at line 1
#

不转义的话，* 就是当前目录下的所有文件。

Answer 3

回复 1# songwubin007

    try: cmd="/usr/local/mysql-5.1.54/bin/mysql -uroot -p123456 -h192.168.1.124 -e \\\"select \* from mysql.user user='$user' limit 1\\\"";

Answer 4

回复  songwubin007

    try: cmd="/usr/local/mysql-5.1.54/bin/mysql -uroot -p123456 -h192.168.1 ...
blackold 发表于 2011-04-12 23:11

    + user=root
+ cmd=/usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e \"select \* from mysql.user where user='root' limit 1\"
+ eval /usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e \"select \* from mysql.user where user='root' limit 1\"
+ /usr/local/mysql-5.1.54/bin/mysql -ureadonly -p123456 -h192.168.1.153 -e "select * from mysql.user where user=root limit 1"
/usr/local/mysql-5.1.54/bin/mysql  Ver 14.14 Distrib 5.1.54, for unknown-linux-gnu (x86_64) using  EditLine wrapper
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL v2 license
Usage: /usr/local/mysql-5.1.54/bin/mysql [OPTIONS] [database]
  -?, --help          Displa

还是不行

Answer 5

本帖最后由 blackold 于 2011-04-12 23:41 编辑

回复 5# songwubin007

    是不是省了尾分号
   try: cmd="/usr/local/mysql-5.1.54/bin/mysql -uroot -p123456 -h192.168.1.124 -e \\\"select \* from mysql.user user='$user' limit 1\;\\\""

Answer 6

mysql不太熟，但是这个sql不需要where的吗？

Answer 7

跟7楼有同样的疑问

Answer 8

本帖最后由 dgww 于 2011-04-13 12:32 编辑

回复 7# oilz

   

取消\，然后加上where