04-23-2015
You're welcome. Yes, the for loop does not redirect stdin, whereas the while read loop does. stdin is needed by the ssh command, so ssh was complaining that stdin could not be used..
The adaptation uses the unused file descriptor 3 rather than stdin (file descriptor 0)..
Last edited by Scrutinizer; 04-23-2015 at 09:30 AM..
These 3 Users Gave Thanks to Scrutinizer For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi all,
I am an amateur k shell scripter and came across something I need clarification on.
while ; do
various commands
done
What is the "" condition testing for in the above while loop?
THx,
Bookoo (5 Replies)
Discussion started by: bookoo
5 Replies
2. UNIX for Dummies Questions & Answers
I'm trying to create a loop that will prompt the user for 15 values, not forcing them to enter all 15. If the user enters through one or more of the prompts the null value needs to be converted to 0, otherwise set the parameter = to the value entered:
ex.
Please enter file no #1: 17920
... (4 Replies)
Discussion started by: vdc
4 Replies
3. UNIX for Dummies Questions & Answers
Hello,
I'm not sure if this is more appropriate for the 'unix for dummies' or the 'unix for experts' forum because I'm new to this forum and this is the second topic I've discussed, but if you could let me know which one was more appropriate for something like this, please do!
So in tr (an... (2 Replies)
Discussion started by: juliette salexa
2 Replies
4. Shell Programming and Scripting
Hi All
I have some directories on our server which are containing .csv files. i need to print value of cell "B2" from those csv files. Please advise.
I have tried head command as example: head -2 */Book_Collection_Report_1_-_Collection_Requests_trials.csv | sed -n "3p" | awk -F","... (4 Replies)
Discussion started by: yash1978
4 Replies
5. Shell Programming and Scripting
Hi All,
I am very new to Shell scripting. I read basic scripting manual. But i didn't understand the code. Please tell the meaning of the below code:
while getopts "F:f:R:r:C:c:" opt 2>/dev/null
do
case ${opt} in
F|f) FREQUENCY_MODE=$OPTARG;;
... (3 Replies)
Discussion started by: pdathu
3 Replies
6. Shell Programming and Scripting
Hi All,
Please find my problem below:
I have a file at two different nodes dev and test
1st find> find /u/dev/local/abc -name ab.dat
--Since this file can be in several sub directories
2nd find> find /u/test/local/abc -name ab.dat
I find my 1st find result and do compare with 2nd... (5 Replies)
Discussion started by: varun_bharadwaj
5 Replies
7. Programming
I think both write at the end of the file ......
but is there a sharp difference between those 2 instruction .....
thank you
this is my 3rd question today forgive me :D (1 Reply)
Discussion started by: fwrlfo
1 Replies
8. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
In this script you will take a directory as input from the user and change the end of line sequence from a Unix... (1 Reply)
Discussion started by: Pcarson
1 Replies
9. UNIX for Dummies Questions & Answers
Why wont my for statements work? Im trying to get this script to swich to a user an if you put in a start/stop/or restart paramater to do just that for each user. I commented out the actual start/stop actions to test it just by using echos and not do anything hasty in the environment but it... (0 Replies)
Discussion started by: LilyClaro
0 Replies
10. Shell Programming and Scripting
In the awk I am trying to subtract the difference $3-$2 of each matching $4 before the first _ (underscore) and print that value in $13.
I think the awk will do that, but added comments. What I am not sure off is how to add a line or lines that will add sum each matching $13 value and put it in... (2 Replies)
Discussion started by: cmccabe
2 Replies
LEARN ABOUT SUNOS
continue
break(1) User Commands break(1)
NAME
break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until loop
SYNOPSIS
sh
break [n]
continue [n]
csh
break
continue
ksh
*break [n]
*continue [n]
DESCRIPTION
sh
The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.
The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.
csh
The break utility resumes execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.
The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.
ksh
The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified, then break n levels. If n is
greater than the number of enclosing loops, the outermost enclosing loop shall be exited.
The continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera-
tion are not performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), exit(1), ksh(1), sh( 1), attributes(5)
SunOS 5.10 17 Jul 2002 break(1)