Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Executing commands with xargs
Top Forums UNIX for Dummies Questions & Answers Executing commands with xargs Post 5372 by bmopal on Monday 13th of August 2001 03:33:05 PM
Old 08-13-2001
Java Executing commands with xargs
I have a SQL script that requires values from the environment in order to execute. I found a way to get the desired results but my process is a little choppy. Any suggestions on how to clean this up would be greatly appreciated.

SQL Script
-------------
select a, b, c
from d
where a = '$VAR'
/
quit

The following command builds a temporary file that will be executed to create the new SQL script for execution
----------------------------------------------------------------------------
more bmo.sql|xargs -i echo "echo \"{}\"" >> bmo.tmp.ux

Permissions are then changed
--------------------------------------
chmod 700 bmo.tmp.ux

File is then executed directing output to new file.
--------------------------------------------------------------
bmo.tmp.ux > bmo.tmp.sql

The new file can then be used and the *.tmp.* file can be removed after a successful execution.
------------------------------------------------------------------------
rm bmo.tmp.ux bmo.tmp.sql

I was hoping someone knew a trick so I could create my *.tmp.sql file using the xargs command. I have attempted to do so but xargs does not seem to replace the environment variable with it's contents when called from the echo.

Any suggestions would be apprecitated. Thanks.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Executing commands after I log off

Hi, guys ! I have at home a simple network. I have a server that shares the internet connection to my computer and another another computer which is located in another room. When I want to download something, I'd like to download directly on the server, without letting my computer on. The server... (2 Replies)
Discussion started by: Sergiu-IT
2 Replies

2. Shell Programming and Scripting

Can Xargs execute multiple commands of evry input file

Hello , I am trying to print the footer of evry file in the given directory with xargs command like follows ls -1 | xargs -I {} gzcat {} | tail -1 now problem with this is only last file foooter is getting printed as " | tail -1 " is getting executed for the last file. I know this can... (4 Replies)
Discussion started by: nilesrex
4 Replies

3. Red Hat

How commands are executing ?

Hi Folks, I have a small doubt, the binary commands under /bin and /sbin as well as other path binary files, if you peek deep into that, you can find the difference in the way of normal perl programming and some commands will be like binary files. how are the commands executing like the... (3 Replies)
Discussion started by: gsiva
3 Replies

4. Shell Programming and Scripting

Executing many commands at once

Hi, I want to run these two commands one after the other. awk 'BEGIN {OFS="\t"} {print $2}' sort -u rather than typing awk 'BEGIN {OFS="\t"} {print $2}' file1 > file2, then sort -u file2 > file3. Is it possible to run both commands on file1 then get output file3? Its kinda hard for... (5 Replies)
Discussion started by: kylle345
5 Replies

5. Shell Programming and Scripting

Executing commands

I need to execute a command to run my script several times with varying parameters perl ex.pl -b 130198 -e 130884 -c plot plot.txt 1_plot.txt perl ex.pl -b 1345 -e 1308 -c plot plot.txt 2_plot.txt perl ex.pl -b 1345567 -e 130898 -c plot plot.txt 3_plot.txt . . . 100's of excutions ... (2 Replies)
Discussion started by: Lucky Ali
2 Replies

6. Shell Programming and Scripting

Executing two commands in parallel

Hi, I am stuck into a situation where i want to execute a command in my shell script well along with a previous command in order to achieve something but i am not figuring out a way. here is a snippet: service management restart rm -rf lock.file in the above, if you see, i am trying to... (5 Replies)
Discussion started by: sunrexstar
5 Replies

7. Shell Programming and Scripting

Xargs: multiple commands to each argument

Hello. There is my one-liner to get subjects of potential spam mails sudo exiqgrep -bf "spamer@example.com" |cut -d' ' -f1 |xargs -I ~ sudo /usr/sbin/exim -Mvh ~ |grep 'Subject: ' I want to insert blank line after each iteration to make output more readable. I tried sudo exiqgrep -bf... (1 Reply)
Discussion started by: urello
1 Replies

8. Shell Programming and Scripting

Executing commands sequentially

Hello. I am new in shell script. Could anyone help me? I have un shell script. I need each command in it be sequentielly, when the first command ends the second starts. When the second ends et third starts, and so on Thanks in adavance (1 Reply)
Discussion started by: nurinolo
1 Replies

9. Shell Programming and Scripting

Executing MQ commands in Perl

If you want to capture the output of any command, we then will be writing the system command in `` or qx. `` an qx works fine with all linux and windows system commands. But when I execute the below code.. it is displaying the output on the screen directly instead of storing to variable ... (3 Replies)
Discussion started by: giridhar276
3 Replies

10. UNIX for Beginners Questions & Answers

Piping commands using xargs

Need help in piping commands using xargs I have several .tar.gz files that I need to list the folder content in a subdirectory. For example, a.tar.gz b.tar.gz c.tar.gz The following command works great for each .tar.gz file but it's a pain to run the tar command for each file. tar -tf... (11 Replies)
Discussion started by: april
11 Replies

LEARN ABOUT DEBIAN

cvm-sql

cvm-sql(7)						 Miscellaneous Information Manual						cvm-sql(7)

NAME

       cvm-sql - CVM SQL Framework

QUERY SUBSTITUTION

       $VAR  and  ${VAR} are replaced with the quoted value of the environment variable named VAR.  Use the second form when VAR contains anything
       other than alpha-numeric or underscore (_) characters.  Do not include quotes in the query.  The variables account and domain  contain  the
       account and domain names given by the CVM client.  $$ is replaced with a single dollar sign.

QUERY RESULTS

       The query must produce the following fields exactly in order.  All required fields must not be null or empty.

       1.     Password, encrypted with crypt(3) (required)

       2.     Actual account name (required)

       3.     User ID (integer) (required)

       4.     Group ID (integer) (required)

       5.     Directory (required)

       6.     Real name (optional)

       7.     Login shell (optional)

       8.     Group name (optional)

       9.     Domain name (optional)

       10.    System account name (optional)

       11.    System account directory (optional)

       12.    Mailbox path (optional)

DEFAULT QUERY

       SELECT  password, username, userid, groupid, directory, realname, shell, groupname, domain, sys_username, sys_directory FROM accounts WHERE
       username=$account AND domain=$domain

SEE ALSO

       cvm-mysql(8), cvm-pgsql(8), cvm-pwfile(8), cvm-qmail(8), cvm-unix(8), cvm-vmailmgr(8), cvm-benchclient(8), cvm-checkpassword(8),  cvm-test-
       client(8)

	http://untroubled.org/cvm/cvm.html

																	cvm-sql(7)
All times are GMT -4. The time now is 06:49 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy