Sponsored Content
Top Forums Shell Programming and Scripting Read from file as script parameter Post 76163 by zazzybob on Saturday 25th of June 2005 09:17:25 AM
Old 06-25-2005
So you want to read a file line by line and do something with each line?

The easiest and fastest way is...
Code:
while read line; do
  # do something with $line
done < myfile.txt

So for your requirements, I assume something like
Code:
while read username; do
   /path/to/script ${username} >> data.dat
done < list_of_usernames_one_per_line.txt

is what you want.

If you're are executing lots of (different) commands and want the output all to go to the same file, something like
Code:
{  
  command1
  command2
  command3
} >> foo.txt

is a good way to group the commands, and not have trillions of >> redirects.

Cheers
ZB
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

parameter file for a shell script

Hi I was able to pass parameters to a shell script from the command line but now, I am trying to make the shell script to get those parameters/values from a file. Please give me ideas how to do this or if you have an example or website that shows how to do this. I tried searches but it... (2 Replies)
Discussion started by: bryan
2 Replies

2. Shell Programming and Scripting

Passing parameter from one file to shell script

Hi All, I have a 2 files. File1 i am generating using an ETL tool, which is a comman seperated delimited file which contains country code & load date. everytime, this country code will be updated from a table. It might be AB or BA & ld_date will be for which date we need to load the file. ... (7 Replies)
Discussion started by: Amit.Sagpariya
7 Replies

3. Shell Programming and Scripting

awk/sed script to read values from parameter files

Hi, I am writing a shell program that executes a lot of Oracle SQL Files on different databases based on the enviroment setting value. I am trying to design a parameter file where i can store the environment values for all the databases in the below format Environment File File Name... (6 Replies)
Discussion started by: rajan_san
6 Replies

4. Shell Programming and Scripting

creating a parameter file in the script

Here is my code which i am using wright now: CODE #!/bin/bash awk ' BEGIN { FS="|"; while ( getline <"file1.txt" > 0) a=$2 } { if($1 in a) printf("%s %s Specialty Mapped\n", $1, a) > "mapped.txt" else printf("%s %s Specialty Not mapped\n", $1, $2) > "notmapped.txt" ... (2 Replies)
Discussion started by: dsh007
2 Replies

5. Shell Programming and Scripting

Read parameter file in a shell script to unload a DB2 Table???

Hi , I Have following requirement: DB2 Sql query to pass from a parameter file for example, I would create a parameter file with (SELECT column 1, column 2 FROM Table name) then job would read it and create a file with the contents named table.txt How to write/modify below ksh script to... (10 Replies)
Discussion started by: developer.dwh9
10 Replies

6. Shell Programming and Scripting

unable to read a parameter

All, on command prompt when i am testing I am able to get the value of 'msgtime' parameter but in the script I get a space value for it . Please help .. following is the code snippet - grep "Component Manager stopped" msgtime.txt | while read line ... (16 Replies)
Discussion started by: dhirajdsharma
16 Replies

7. Shell Programming and Scripting

How to read a directory as parameter in shell script?

Hi All, I have written a shell script to compile an oracle R12 form and also a procedure is called from it. The procedure registers the form, function and creates a menu entry. I took directory as a parameter. Code is as below: #!/bin/ksh echo... (3 Replies)
Discussion started by: veena484
3 Replies

8. Shell Programming and Scripting

Passing parameter to script, and split the parameter

i am passing input parameter 'one_two' to the script , the script output should display the result as below one_1two one_2two one_3two if then echo " Usage : <$0> <DATABASE> " exit 0 else for DB in 1 2 3 do DBname=`$DATABASE | awk -F "_" '{print $1_${DB}_$2}` done fi (5 Replies)
Discussion started by: only4satish
5 Replies

9. Shell Programming and Scripting

Read parameter file for a shell script

Hi All, I need urgent Help from all of you here. Below is my code- ================================================== #!/usr/bin/sh cd $1 cat $2 | tr -ds "$" "" > parameter_file.param export `parameter_file.param` chmod 777 parameter_file.param echo $1 echo $2 cd $prmDirInput... (5 Replies)
Discussion started by: Amit786
5 Replies

10. Shell Programming and Scripting

How pass the input parameter to a file in the script ?

OS version: RHEL 6.7 myTextFile.txt file is referred within Script1.sh script, I only execute Script1.sh and I want the input variable to be passed inside myTextFile.txt . Any idea how I can do this ? $ cat script1.sh cat myTextFile.txt $ cat myTextFile.txt $1 Requirement1.... (4 Replies)
Discussion started by: kraljic
4 Replies
DH_INSTALLINIT(1)						     Debhelper							 DH_INSTALLINIT(1)

NAME
dh_installinit - install init scripts and/or upstart jobs into package build directories SYNOPSIS
dh_installinit [debhelperoptions] [--name=name] [-n] [-R] [-r] [-d] [--params] DESCRIPTION
dh_installinit is a debhelper program that is responsible for installing init scripts with associated defaults files, as well as upstart job files into package build directories. It also automatically generates the postinst and postrm and prerm commands needed to set up the symlinks in /etc/rc*.d/ to start and stop the init scripts. FILES
debian/package.init If this exists, it is installed into etc/init.d/package in the package build directory. debian/package.default If this exists, it is installed into etc/default/package in the package build directory. debian/package.upstart If this exists, it is installed into etc/init/package.conf in the package build directory. OPTIONS
-n, --noscripts Do not modify postinst/postrm/prerm scripts. -o, --onlyscripts Only modify postinst/postrm/prerm scripts, do not actually install any init script, default files, or upstart job. May be useful if the init script or upstart job is shipped and/or installed by upstream in a way that doesn't make it easy to let dh_installinit find it. -R, --restart-after-upgrade Do not stop the init script until after the package upgrade has been completed. This is different than the default behavior, which stops the script in the prerm, and starts it again in the postinst. This can be useful for daemons that should not have a possibly long downtime during upgrade. But you should make sure that the daemon will not get confused by the package being upgraded while it's running before using this option. -r, --no-restart-on-upgrade Do not stop init script on upgrade. --no-start Do not start the init script on install or upgrade, or stop it on removal. Only call update-rc.d. Useful for rcS scripts. -d, --remove-d Remove trailing d from the name of the package, and use the result for the filename the upstart job file is installed as in etc/init/ , and for the filename the init script is installed as in etc/init.d and the default file is installed as in etc/default/ . This may be useful for daemons with names ending in d. (Note: this takes precedence over the --init-script parameter described below.) -uparams --update-rcd-params=params -- params Pass params to update-rc.d(8). If not specified, defaults will be passed to update-rc.d(8). --name=name Install the init script (and default file) as well as upstart job file using the filename name instead of the default filename, which is the package name. When this parameter is used, dh_installinit looks for and installs files named debian/package.name.init, debian/package.name.default and debian/package.name.upstart instead of the usual debian/package.init, debian/package.default and debian/package.upstart. --init-script=scriptname Use scriptname as the filename the init script is installed as in etc/init.d/ (and also use it as the filename for the defaults file, if it is installed). If you use this parameter, dh_installinit will look to see if a file in the debian/ directory exists that looks like package.scriptname and if so will install it as the init script in preference to the files it normally installs. This parameter is deprecated, use the --name parameter instead. This parameter is incompatible with the use of upstart jobs. --error-handler=function Call the named shell function if running the init script fails. The function should be provided in the prerm and postinst scripts, before the #DEBHELPER# token. NOTES
Note that this command is not idempotent. dh_prep(1) should be called between invocations of this command. Otherwise, it may cause multiple instances of the same text to be added to maintainer scripts. SEE ALSO
debhelper(7) This program is a part of debhelper. AUTHORS
Joey Hess <joeyh@debian.org> Steve Langasek <steve.langasek@canonical.com> 9.20120909 2012-04-10 DH_INSTALLINIT(1)
All times are GMT -4. The time now is 07:27 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy