Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Which is more efficient - sleep or infinite while?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Which is more efficient - sleep or infinite while?
# 8  
Old 08-21-2008
Quote:
Originally Posted by Perderabo
but I wonder why you object to it. I object to it because it is a terribly misleading construct
well, [ 1 ] implies the shell executes all the code for the builtin test
as i undestand it, the ":" is more closer to null code...
yes, both are built in, but im sure [ has tons of lines to work as the external test (and all the testing capabilitie it has)
: "looks & feels slimer"
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Infinite loop query

I have a script script.shwhich is scheduled to run at 11 AM everyday. # script.sh Code: ./scb_script.sh & unfortunately scb_script.sh is running today in infinite loop as respective files are not available. My question, when script.sh starts running tomorrow, will the old process be... (1 Reply)
Discussion started by: JSKOBS
1 Replies

2. Homework & Coursework Questions

Help with infinite loop problem

1. The problem statement, all variables and given/known data: My problem is an infinite loop when i press any other key other then Y or y in the while loop. what i want it to do is return to the normal script outside of it if pressing N or n or keep asking the same question if its any other... (4 Replies)
Discussion started by: Ren_kun
4 Replies

3. Programming

Infinite thread

I created a thread which pings a machine for every 15 seconds. I made my thread function in infinite loop. Main process also in infinite loop and will run for years. I wonder the thread will continue as long as main process continuous or will thread terminates at some point? Is there any life... (6 Replies)
Discussion started by: satish@123
6 Replies

4. Shell Programming and Scripting

Infinite while loop

what is the difference between while:,while true and while false? (6 Replies)
Discussion started by: proactiveaditya
6 Replies

5. Shell Programming and Scripting

Wrapping 'sleep' with my 'resleep' function (Resettable sleep)

This is a very crude attempt in Bash at something that I needed but didn't seem to find in the 'sleep' command. However, I would like to be able to do it without the need for the temp file. Please go easy on me if this is already possible in some other way: How many times have you used the... (5 Replies)
Discussion started by: deckard
5 Replies

6. Shell Programming and Scripting

infinite while do loop problem

hi all, this is how my scrip looks like #!/bin/sh bindir='/opt/apps/script/bin' datadir='/opt/apps/script/data' dir='/opt/apps/script' while : ; do ls -1rt /opt/apps/script/data/check.txt*|tail -1 > /dev/null 2>&1 if ;then chmod +rwx $bindir/dummy2.sh ... (8 Replies)
Discussion started by: tententen
8 Replies

7. Shell Programming and Scripting

Infinite loop not looping

Hi guys, I'm having a problem getting my infinite loop to loop. It simply reads in the users choice form the menu, executes the corresponding case statement and quits instead of looping back to the main menu again. I have a feeling it might be something with my if then statements within the case... (2 Replies)
Discussion started by: hootdocta5
2 Replies

8. UNIX for Advanced & Expert Users

handling Infinite fork

how Unix handles as process which forks infinitely. like ....... while(1) fork(); ........ What happens when it is executed and how to avoid it. Thanks, Ashish (3 Replies)
Discussion started by: ashish_uiit
3 Replies

9. Solaris

ls command in infinite Loop

Hi, whenever I am giving a 'ls' command system is going into infinite loop displaying the current home directory. There is no separate shell script/file with ls name anywhere in the system. I am using Solaris 10. Any help / guidance in solving this problem is highly appreciated. ... (3 Replies)
Discussion started by: umakant
3 Replies
Login or Register to Ask a Question

LEARN ABOUT SUNOS

sleep

sleep(3C)																 sleep(3C)

NAME

       sleep - suspend execution for an interval of time

SYNOPSIS

       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

       The  caller  is	suspended  from execution for the number of seconds specified by the argument. The actual suspension time may be less than
       that requested because any caught signal will terminate the sleep() following execution of that signal's catching routine.  The	suspension
       time  may  be longer than requested by an arbitrary amount because of the scheduling of other activity in the system. The value returned by
       sleep() will be the ``unslept'' amount (the requested time minus the time actually slept) if the caller incurred premature arousal  because
       of a caught signal.

       The use of the sleep() function has no effect on the action or blockage of any signal. In a multithreaded process, only the invoking thread
       is suspended from execution.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

       nanosleep(3RT), attributes(5), standards(5)

								    16 Mar 2005 							 sleep(3C)