www.unix.com Open in urlscan Pro
209.126.104.117  Public Scan

Form analysis
3 forms found in the DOM

POST https://www.unix.com/search.php?do=process

<form action="https://www.unix.com/search.php?do=process" method="post">
  <input type="hidden" name="do" value="process">
  <input type="hidden" name="quicksearch" value="1">
  <input type="hidden" name="childforums" value="1">
  <input type="hidden" name="exactname" value="1">
  <input type="hidden" name="s" value="cc62063171fdc66cbeb1be84a100ec74">
  <input type="hidden" name="securitytoken" value="guest">
  <input type="hidden" name="showposts" value="0" id="rb_nb_sp0_neo" tabindex="1002">
  <div id="bs-search-bar" class="nav-top-margin" style="margin-bottom:20px;">
    <div class="input-group">
      <span class="input-group-addon"><button class="btn btn-light" style="background-color:  #f0f0f7;border:1px solid silver;color:gray;"><i class="fas fa-search neo-toolbit" data-original-title="" title=""></i></button></span>
      <input type="search" class="form-control" style="background-color: lightyellow" name="query" tabindex="1001" placeholder="Search The UNIX and Linux Forums (Quick Search)">
    </div>
  </div>
</form>

POST https://www.unix.com/search.php?do=process

<form action="https://www.unix.com/search.php?do=process" method="post">
  <input type="hidden" name="do" value="process">
  <input type="hidden" name="quicksearch" value="1">
  <input type="hidden" name="childforums" value="1">
  <input type="hidden" name="exactname" value="1">
  <input type="hidden" name="s" value="cc62063171fdc66cbeb1be84a100ec74">
  <input type="hidden" name="securitytoken" value="guest">
  <div>
    <input type="text" class="bginput form-control" name="query" size="25" tabindex="1001">
  </div>
  <div style="margin:10px 0px 10px 0px;text-align:center;">
    <input type="submit" class="button btn btn-primary btn-block" value="Search" tabindex="1004">
  </div>
  <div style="margin-top:6px">
    <label for="rb_nb_sp0"><input type="radio" name="showposts" value="0" id="rb_nb_sp0" tabindex="1002" checked="checked" style="margin: 0px 5px 0px 0px;">Show Threads . </label> &nbsp; <label for="rb_nb_sp1"><input type="radio" name="showposts"
        value="1" id="rb_nb_sp1" tabindex="1003" style="margin: 0px 5px 0px 0px;">Show Posts</label>
  </div>
</form>

GET https://www.unix.com

<form action="https://www.unix.com" method="get">
  <div style="padding:0px; margin:0px; border:0;width:100%;text-align:center;">
  </div>
  <div style="background-color:white;">
    <br>
    <div style="text-align:center; width:100%;background-color:white;">
      <div class="smallfont" style="width:100%;background-color:white;padding-left:20px;padding-right:20px;">
        <strong>
          <span class="neo-footer-contactus"><a href="https://www.unix.com/sendmessage.php?s=cc62063171fdc66cbeb1be84a100ec74" style="text-decoration:none;" rel="nofollow" accesskey="9">Contact Us</a></span>
          <span class="neo-footer"> - <a href="https://www.unix.com/" style="text-decoration:none;">The UNIX and Linux Forums - unix commands, linux commands, linux server, linux ubuntu, shell script, linux distros.</a> -</span>
          <span class="neo-footer"><a style="text-decoration:none;" href="https://buysellads.com/buy/detail/215189" rel="nofollow" accesskey="9">Advertising</a> - </span>
          <a style="text-decoration:none;" href="https://www.unix.com/shell-programming-and-scripting/12021-pass-parameter-back-calling-program.html#top" onclick="self.scrollTo(0, 0); return false;"><span class="neo-footer">Top</span></a>
        </strong>
      </div>
    </div>
  </div>
</form>

Text Content

The UNIX and Linux Forums


Forum Home
Linux and Unix Man Pages
Search Forums
Search Community Posts
Today's Posts
Quick Links

Man Pages RedHat Commands OpenSolaris Commands Linux Commands SunOS Commands
FreeBSD Commands All UNIX Man Pages All Linux Man Pages Full Man Repository

Login or Register to Ask a Question and Join Our Community


Search Forums
Show Threads .   Show Posts
Tag Search Advanced Search

Quick Links Contact Us Forum Rules Today's Posts FAQ Pictures & Albums All
Albums Miscellaneous What is My IP Whois Mark Forums Read







SHELL PROGRAMMING AND SCRIPTING


PASS PARAMETER BACK TO CALLING PROGRAM

Tags

beginners, shell scripts



Login to Discuss or Reply to this Discussion in Our Community

Page 1 of 2 1 2 >



 
Thread Tools Search this Thread

Top Forums Shell Programming and Scripting pass parameter back to calling
program
# 1  
11-18-2003
jthomas
Registered User
7, 0
Join Date: Nov 2003
Last Activity: 10 December 2003, 10:20 AM EST
Posts: 7
Thanks Given: 0
Thanked 0 Times in 0 Posts

pass parameter back to calling program

--------------------------------------------------------------------------------

Hi all,

I am running AIX version 4. I have a shell script that is calling another
script. I want the called script to obtain a value and pass it back to the
calling script. So far, I know that to pass a parameter to a called script is as
such:

sh proc2.sh $1 $2 etc.

What I don't know how to do though is pass a parameter back the other way. Can
any one help??

Thanks
Jules



jthomas View Public Profile for jthomas Find all posts by jthomas




# 2  
11-18-2003
Perderabo
Administrator Emeritus
9,926, 461
Join Date: Aug 2001
Last Activity: 26 February 2016, 12:31 PM EST
Location: Ashburn, Virginia
Posts: 9,926
Thanks Given: 63
Thanked 461 Times in 270 Posts

sh proc2.sh $1 $2 etc

is really off to a bad start. It would be better to call it proc2 rather than
proc2.sh. And invoking it via an explicit call to sh is a very bad idea. You
should make the first line of proc2 something like:
#! /usr/bin/sh
(but use your path to sh) and then do a:
chmod +x proc2
When you do these things you can then run proc2 as an executable:
proc2 $1 $2

Now if the author of proc2 decides to rewrite it in c or ksh or perl etc, you
don't need to change every script that called it. Famous unix program like
"touch" and "grep" started out as sh scripts.

Also $1 and $2 refer to the first and second positional parameters in the
caller. It would be rare to pass those to a second program.

Since you're using sh rather than ksh, you must be using expr for any arithmetic
like this:
x=1
x=`expr $x + 1`
This is one way to return a parameter. The backticks take the stdout from the
program. And the other way it the exit code, which is very limited.

Here is a sample:
#! /usr/bin/sh
echo hello
exit 2

And another script would do this:
x=`sample`
echo $x
sample
echo $?



Perderabo View Public Profile for Perderabo Find all posts by Perderabo




# 3  
11-18-2003
mbb
Registered User
104, 0
Join Date: Aug 2001
Last Activity: 25 October 2010, 3:31 AM EDT
Location: UK
Posts: 104
Thanks Given: 0
Thanked 0 Times in 0 Posts

You can use the exit command to pass back an error number. e.g. exit 56

This value is passed back into the calling shell and can be examined in the
built in variable $?.

If you want to do something a little more complex (like a string) then the
called script should echo the return value e.g.

echo $SOME_VARIABLE.

To use this value in the calling script:

RETURN_VAR=`called_script param1 10 20`

Notice the back quote(`). You are telling ksh to replace the results of the
script into the variable i.e. what ever is echoed to stdout.

You could also use syntax like:

RETURN_VAR=$(called_script param1 10 20)

If you want to pass back several parameters then echo them as one string, using
a delimiter to separate the values.



mbb View Public Profile for mbb Find all posts by mbb



# 4  
11-18-2003
jthomas
Registered User
7, 0
Join Date: Nov 2003
Last Activity: 10 December 2003, 10:20 AM EST
Posts: 7
Thanks Given: 0
Thanked 0 Times in 0 Posts

I called the script like you said in the funny `` quotes. In the called program
did the echo...all worked like a charm.

Thanks MBB for that extra bit at the end, my very next question was in fact;
"What about when you have more than 1 parameter"!

Appreciate the help guys, thanks.



jthomas View Public Profile for jthomas Find all posts by jthomas



# 5  
11-19-2003
linuxpenguin
Registered User
350, 5
Join Date: May 2002
Last Activity: 28 March 2014, 4:09 PM EDT
Location: India
Posts: 350
Thanks Given: 0
Thanked 5 Times in 5 Posts

how about this one

echo $retval|awk -v x="YOUR OUTPUT" '{print substr(x,2,4)}'

so you return the output of ur script using

retval=`your script`

and use retval as a variable to awk and the use the substring function of awk to
split the output

i know echo retval doesnt look elegant tho, but this is just a sample to hint
you the use of awk and its substr function



linuxpenguin View Public Profile for linuxpenguin Find all posts by linuxpenguin



# 6  
11-19-2003
linuxpenguin
Registered User
350, 5
Join Date: May 2002
Last Activity: 28 March 2014, 4:09 PM EDT
Location: India
Posts: 350
Thanks Given: 0
Thanked 5 Times in 5 Posts

probably

if retval is 2 4 5 6
echo $retval|awk '{print substr($0,2,4)'

this would result into " 4 6"



linuxpenguin View Public Profile for linuxpenguin Find all posts by linuxpenguin



# 7  
11-20-2003
jthomas
Registered User
7, 0
Join Date: Nov 2003
Last Activity: 10 December 2003, 10:20 AM EST
Posts: 7
Thanks Given: 0
Thanked 0 Times in 0 Posts

Thanks for the reply LP. I must admit, I know nothing about AWK. I have tried
once or twice to use it, all I get are strange errors that I can't debug. My
UNIX administrator don't even know how the command works. They gave me a book
once that should have explained the awk procedure, but it was a piece of rubbish
- couldn't make head or tails of it.

I would love to be able to use the awk procecedure cos I understand that its
really powerfull. Where do I go though to get a really good set of definitions
of the syntax? Looking at your code I can understand what you are getting at,
but I don't know the mechanics of what you are doing, e.g. what is the -v option
and what other type of options are there, why do you print the results etc etc
etc



jthomas View Public Profile for jthomas Find all posts by jthomas






Page 1 of 2 1 2 >

Login or Register to Ask a Question

Previous Thread | Next Thread



9 MORE DISCUSSIONS YOU MIGHT FIND INTERESTING


1. SHELL PROGRAMMING AND SCRIPTING


HOW TO GET FRONT AND BACK PARAMETER OF EACH CHARACTERS?

I have list of words file. I trying to get a front and back parameter of each
characters of words. hello .... .... Here is what I have done: awk '{ word=$1;
len=length(word); tlen=2*len-1; for (i=1; i<len; i++) a="#"; for (j=1; j<=len;
j++) a=substr(word,j,1); ... (15 Replies)

DISCUSSION STARTED BY: PARANRAT

15 Replies


2. SHELL PROGRAMMING AND SCRIPTING


PASS PARAMETER

Hi, I have following for loop , please let me know how to get
${TXP_EXT_TABLE_${i}_SQL} parameter with 1DAY and 7DAY values. for i in 1DAY
7DAY do ${NZSQL_DIR}/nzsql -h ${HOST} -time -v ON_ERROR_STOP=1 -f
${SQL_DIR}/${TXP_EXT_TABLE_${i}_SQL} > ${TMP_LOG_FILE} 2>&1 done ... (4 Replies)

DISCUSSION STARTED BY: SANDY162

4 Replies


3. SHELL PROGRAMMING AND SCRIPTING


HOW TO PASS THE ENVIRONMENT NAME WHILE CALLING JAVA PROGRAM FROM UNIX SCRIPT?

Hi, I'm trying to test one unix shell script in dev environment. But I'm not
sure how to pass the environment in my java program calling code. I'm trying to
use -DconsumerEnv="DEV" but unfortunately I get 'null' while trying to print the
value from java class. System.out.println("Environment: "+... (4 Replies)

DISCUSSION STARTED BY: PRAMIT

4 Replies


4. UNIX FOR DUMMIES QUESTIONS & ANSWERS


PASS VALUE BACK TO UNIX VARIABLE

i had this unix korn shell code that connects to oracle database and execute the
oracle procedure. i need to add a variable that indicates the oracle procedure
failed. basically the variable is to check if the oracle procedure failed it
will assign 1 and when the variable is equal to 1 it will not... (4 Replies)

DISCUSSION STARTED BY: WTOLENTINO

4 Replies


5. HOMEWORK & COURSEWORK QUESTIONS


CALLING COMPILED C PROGRAM WITH PERL PROGRAM

Long story short: I'm working inside of a Unix SSH under a bash shell. I have to
code a C program that generates a random number. Then I have to call the
compiled C program with a Perl program to run the C program 20 times and put all
the generated random #s into a text file, then print that text... (1 Reply)

DISCUSSION STARTED BY: JDKIRBY

1 Replies



6. UNIX FOR DUMMIES QUESTIONS & ANSWERS


HOW TO PASS THE PARAMETER VALUE TO A... ?

Hello I have a simple code like this one: #!/bin/ksh VER=$1 cat /usr/text |
while read line do echo $line done Let's say $1=1.0.0 and the contents of text
is: abcd.cfg asdf I would like the output to be like this abcd1.0.0.cfg
asdf1.0.0 I am thinking of passing the... (5 Replies)

DISCUSSION STARTED BY: KHESTOI

5 Replies


7. UNIX FOR DUMMIES QUESTIONS & ANSWERS


CALLING PROCESS AND GOING BACK TO THE MAIN LOOP

hi everyone , i want to read an option and depending on the option call the
program .For ex #! /bin/ksh export JAVA_HOME=/home/oracle/jdk1.6.0_20 echo "
Please enter mod-modeler, dev - sqldeveloper" read choice if ; then echo ' SQL
DEVELOPER IS STARTING NOW ... ' cd... (0 Replies)

DISCUSSION STARTED BY: KDEV

0 Replies


8. SHELL PROGRAMMING AND SCRIPTING


HOW TO PASS A PARAMETER

Hi all, How to pass a parameter from a oracle pl/sql procedure parameter to
shell environment and use it? (1 Reply)

DISCUSSION STARTED BY: MEGH

1 Replies


9. SHELL PROGRAMMING AND SCRIPTING


HELP REQUIRED TO PASS THE PARAMETER

i am calling a pl/sql procedure through a shell script, there is one IN and 2
OUT parameter required to pass to the procedure to execute.. My procedure is
XX_CITIDIRECT_EXP_PKG.main_proc and In parameter is p_period which I wanto to
pass 'MAY-06'. Can anyone figure out, whats is wrong here ... (4 Replies)

DISCUSSION STARTED BY: U263066

4 Replies



Login or Register to Ask a Question

MEMBER BADGES AND INFORMATION MODAL

×

Close


FEATURED TECH VIDEOS

Powered By

10



Top 10 Interview Dos and Donts in a Job Interview


Share

Next
Stay




All times are GMT -4. The time now is 04:56 AM.


Contact Us - The UNIX and Linux Forums - unix commands, linux commands, linux
server, linux ubuntu, shell script, linux distros. - Advertising - Top
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy