Visit Our UNIX and Linux User Community


understand the function to execute


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting understand the function to execute
# 1  
Old 07-21-2009
understand the function to execute

Gurus,

Can you please tell me why this script is executing but i am getting no result...also can you tell me what is this gettime() doing?

in a script i wrote this hour.SH
--------------------------
gettime() {
date '+%H' | {
read hour
TIME=${hour}
}
}
:
----------------------
when i do ./hour.SH ...i get no result

SmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilieSmilie
# 2  
Old 07-22-2009
Where are you calling this function and where are you printing TIME.
I get the result when I do this...
Code:
gettime() {
date '+%H' | {
read hour
TIME=${hour}
}
}

gettime
echo $TIME

# 3  
Old 07-22-2009
ksh works, bash and bsh no. Why ? ksh has done like syntax idea is, bash makers has technical answer (last 10 years). There are many forums, where has been asked this question manymanmany times from other shell makers, why not.

Make function like command then no problem in any shell.

Here is solution for read problem in other than ksh (this solution works with ksh also):
Code:
gettime() {
read hour <<EOF
$(date '+%H')
EOF
TIME=${hour}
}

gettime
echo $TIME

This is better way to do function - works like command. My opinion.
Code:
gettime() 
{
   $(date '+%H')
}

TIME=$( gettime )
echo $TIME


Previous Thread | Next Thread
Test Your Knowledge in Computers #935
Difficulty: Medium
A fixed 32-bit data format for system time means that timestamps rolls over approximately every 136 years, with the first such occurrence on 7 February 2036.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Execute function as soon as input is provided in menu drive shell script

Hi All, I have a menu driven scripts. As you know while running the script we have to input the option such as 1,2, and 3 to execute function accordingly. but after selecting the input we have to press Enter. My requirement is to execute function as soon as we press the option. Is there... (5 Replies)
Discussion started by: kiran_j
5 Replies

2. Shell Programming and Scripting

Need help to write a function in shell scripting to execute sql files

Hi, I am new to shell scripting and i need to write a automation script to execute sql files. I need to check the table if it is there in system tables and need to write a function to call the .sql files. For ex. I have a.sql,b.sql,c.sql files, where the sql file contains DELETE and INSERT... (1 Reply)
Discussion started by: Samah
1 Replies

3. Shell Programming and Scripting

Want to use function and execute the below query in script.

#!/bin/bash function getDeliveredDispatches(firstDateTime, lastDateTime, limit) { var cursor = db.dispatches.find( {$and: }} ]}, {"deliveryGroupId" : 1, "batchId": 1, "statusHistory.code" : 1} ); var wrongDispatchesIds = ; print("Number of dispatches selected based on filter = " +... (2 Replies)
Discussion started by: neel2462
2 Replies

4. Shell Programming and Scripting

Execute a function in background and then suspend it

Here is some back ground on the script. The script is to poll an arbitrary number of DB's. To do this I am creating a function that takes the file_path to the DB and the min poll interval as arguments. The function will be called for each DB and then ran in the background. The function I was... (6 Replies)
Discussion started by: ryandavison
6 Replies

5. UNIX for Dummies Questions & Answers

[ASK]execute shell with function in solaris

dear all i need your advice in shell with solaris i have testing script like this #!/usr/bin/bash function test(){ echo "testing only" } ## execute function ## test but if i running always got error like this test.sh: syntax error at line 1: `(' unexpected who can i running this... (7 Replies)
Discussion started by: zvtral
7 Replies

6. UNIX for Dummies Questions & Answers

Execute PL/SQL function from Unix script (.sql file)

Hi guys, I am new on here, I have a function in oracle that returns a specific value: create or replace PACKAGE BODY "CTC_ASDGET_SCHED" AS FUNCTION FN_ASDSCHEDULE_GET RETURN VARCHAR2 AS BEGIN DECLARE ASDSchedule varchar2(6); ASDComplete... (1 Reply)
Discussion started by: reptile
1 Replies

7. UNIX for Advanced & Expert Users

Unable to execute a function using trap

I have a script A which calls script B. I wrote a function in script A to be executed when Kill command is issued for script A and I invoke that function using the trap command.The function identifies all child process running under script A (in this case script B) and kills the child process and... (3 Replies)
Discussion started by: smohandass
3 Replies

8. Shell Programming and Scripting

How to execute local function in awk

Hi All, Can you please tell me how to execute local function written in a shell script with awk. i tried with system command but its giving an error. (1 Reply)
Discussion started by: krishna_gnv
1 Replies

9. Programming

How to periodically execute a function in C ??

Hi, I am looking for a C library feature, to which I can say execute a function every 10 seconds. for Eg #include <timer_lib.h> fun1(){ printf("I am still cool "); } int main(){ run(10,&fun1); // Should register & execute the function fun1 every 10 seconds return 0x0; }... (24 Replies)
Discussion started by: RipClaw
24 Replies

10. Shell Programming and Scripting

How can I execute own ksh function in find -exec

Hi, I wrote a smiple ksh function send_notification() { ... } and want to execute it on each file, matched by the find command. I tried: find / -name "*.err" -mtime -8 -exec send_notification {} \; but it doesn't work. What should I do? I work in ksh on Hp-Ux. Regards, Pit (11 Replies)
Discussion started by: piooooter
11 Replies

Featured Tech Videos