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#1: Why the same command have different results when it is in a bashscript and when it is not?

Posted on 2011-10-10 00:19:20 by PengYu.UT

Hi,

It is seems strange to me why the same command "mysql -hlocalhost
-uxxx" when it is run from the command line, it will show an error.
When it is run in a bash script, it runs fine. I guess this might be
described somewhere, but I'm yet to find the answer. Does anybody know
why this happens and how to make the command line version working?

~$ mysql -hlocalhost -uxxx
ERROR 1045 (28000): Access denied for user 'xxx'@'localhost' (using
password: YES)
~$ cat `which mysqllocalhostxxx.sh `
#!/usr/bin/env bash

mysql -hlocalhost -uxxx
~$ mysqllocalhostxxx.sh
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 101
Server version: 5.5.9 Source distribution

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>


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Regards,
Peng

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#2: Re: Why the same command have different results when it is in a bash script and when it is not?

Posted on 2011-10-10 12:00:00 by Rik Wasmus

> It is seems strange to me why the same command "mysql -hlocalhost
> -uxxx" when it is run from the command line, it will show an error.
> When it is run in a bash script, it runs fine. I guess this might be
> described somewhere, but I'm yet to find the answer. Does anybody know
> why this happens and how to make the command line version working?
>
> ~$ mysql -hlocalhost -uxxx
> ERROR 1045 (28000): Access denied for user 'xxx'@'localhost' (using
> password: YES)
> ~$ cat `which mysqllocalhostxxx.sh `
> #!/usr/bin/env bash
>
> mysql -hlocalhost -uxxx
> ~$ mysqllocalhostxxx.sh
> Welcome to the MySQL monitor. Commands end with ; or \g.

What does 'which mysql' give you? Is it perhaps in 'alias -p'? And is there
perhaps a .my.cnf file in your users directory?
--
Rik Wasmus

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#3: Re: Why the same command have different results when it is in a bash script and when it is not?

Posted on 2011-10-11 10:16:48 by Johan De Meersman

I don't have a direct answer for you, just some thoughts:
* traditionally, "localhost" is thought of as an alias for 127.0.0.1
* mysql however, tends to not interpret it like when connecting to the local server and instead tries to connect to the socket
* to force mysql client to connect over tcp/ip instead, use -h 127.0.0.1

It's possible that the execution environment of a script is subtly different and causes the client to interpret it the other way, but I've no idea what the exact difference would be.


----- Original Message -----
> From: "Peng Yu" <pengyu.ut@gmail.com>
> To: mysql@lists.mysql.com
> Sent: Monday, 10 October, 2011 12:19:20 AM
> Subject: Why the same command have different results when it is in a bash script and when it is not?
>
> Hi,
>
> It is seems strange to me why the same command "mysql -hlocalhost
> -uxxx" when it is run from the command line, it will show an error.
> When it is run in a bash script, it runs fine. I guess this might be
> described somewhere, but I'm yet to find the answer. Does anybody
> know
> why this happens and how to make the command line version working?
>
> ~$ mysql -hlocalhost -uxxx
> ERROR 1045 (28000): Access denied for user 'xxx'@'localhost' (using
> password: YES)
> ~$ cat `which mysqllocalhostxxx.sh `
> #!/usr/bin/env bash
>
> mysql -hlocalhost -uxxx
> ~$ mysqllocalhostxxx.sh
> Welcome to the MySQL monitor. Commands end with ; or \g.
> Your MySQL connection id is 101
> Server version: 5.5.9 Source distribution
>
> Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights
> reserved.
>
> Oracle is a registered trademark of Oracle Corporation and/or its
> affiliates. Other names may be trademarks of their respective
> owners.
>
> Type 'help;' or '\h' for help. Type '\c' to clear the current input
> statement.
>
> mysql>
>

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Hy die't drinkt, is ras een ezel

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