Sponsored Content
Top Forums Shell Programming and Scripting whats the function of brackets here ? Post 302486513 by Scrutinizer on Sunday 9th of January 2011 04:11:49 AM
Old 01-09-2011
Quote:
Originally Posted by m.d.ludwig
[..]
Code:
if [[ condition ]]; then ...

which equivalent to:
Code:
if test condition; then ...

[ ... ] is a synonym for test , while [[ ... ]] is a conditional expression, which is not the same. They are different beasts...
This User Gave Thanks to Scrutinizer For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Whats wrong with my function?? <newbie>

First of all im using Bash, on a Debian-based machine. I tried to write a function that if the ls program found listed more than 25 lines I would automaticly use "ls | less". Its on another computer but if I recall it looked something like this... Note: some code may look strange because im on... (4 Replies)
Discussion started by: riwa
4 Replies

2. UNIX for Dummies Questions & Answers

usage of brackets for if

Hi, I would like to know about the usage of brackets to negate a set of boolean evaluations an equivalent to what i am trying is below if or || ] ] then echo"valid time of day" else echo "invalid input" exit fi the bracket structue as mentioned doesnt work .. i am using ksh.... (4 Replies)
Discussion started by: lakshmikanth
4 Replies

3. Shell Programming and Scripting

Whats wrong in the Function ?

Need your assistance, to find the bug in the function. Function usage erroring out even after passing parameters. usage() { if || ; then echo "************************************************************" echo " CHECK USAGE FOR CORRECT PARAMETERS ... (26 Replies)
Discussion started by: raghunsi
26 Replies

4. Shell Programming and Scripting

Get value between brackets

Hi I am having hard time getting this right and need some help. I Have several log files, and everyone contains the following 3 lines at the end: 4 ETW000 Disconnected from database. 4 ETW000 End of Transport (0000). 4 ETW000 date&time: 13.01.2011 - 08:03:28 I need to capture the value... (7 Replies)
Discussion started by: nimo
7 Replies

5. Shell Programming and Scripting

How to get the value in the first brackets

Hello, I am trying to write a script using ksh. And I want to get the value within the first brackets of a string. For example: 14/04/11 11:35: 00 This is (nn) from the earth. Then i hope to get nn in this case. Can any one advise me how to implement it? Thank you very much! nn (2 Replies)
Discussion started by: n_n
2 Replies

6. Shell Programming and Scripting

Delete text between square brackets and also delete those square brackets using sed or awk

Hi All, I have a text file which looks like this: computer programming systems engineering I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this: computer programming systems engineering I am using... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies

7. Shell Programming and Scripting

Brackets

Hi all. i need a small help. i have written an exit code, which will check whether mo.sh is successful or not. if the status is >0 it will exit the shell. 1>Do you guys think it is a correct way to write? 2>what if i change the double bracket to single. how will it change the o/p. ... (1 Reply)
Discussion started by: sub
1 Replies

8. Shell Programming and Scripting

Function works, trigger causes syntax error, whats my fault??

Needing a hint. Creating that function called Meter my simple script works well. What I want now is to start the last four commented lines to include or trigger a reaction, if there are more than n lines in that .txt-file it shall display that message for example. But the interpreter says there is... (3 Replies)
Discussion started by: 1in10
3 Replies

9. Shell Programming and Scripting

Capture the value between brackets

Hi I am having hard time getting this right and need some help. I Have 3 files, and everyone contains the following:- File1 Today, we have Name(Jack) Age(19) Class (A2) Today, we have Name(Kim) Class (G9) File2 Today, we have Name(Lee) Age(19) Class (A2) Today, we have... (8 Replies)
Discussion started by: samsan
8 Replies

10. Shell Programming and Scripting

Python - Function print vs return - whats wrong

All, I have a basic buzz program written in python with return function. If i change return with print,it works fine but i want to know whats wrong with return statement.Can anyone help me whats wrong with this #!/usr/bin/python def div4and6(s,e): for i in range(s,e+1): if... (5 Replies)
Discussion started by: oky
5 Replies
IRSEND(1)								FSF								 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.8.7pre1 May 2010 IRSEND(1)
All times are GMT -4. The time now is 11:09 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy