Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

replace stdout line in loop

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers replace stdout line in loop
# 1  
Old 09-14-2009
replace stdout line in loop
Hi,

as part of a script i have a loop that goes though a set of files.

This loop can take some time, so i'd like to show the user that something is happening by showing them the filename being worked on.

I could create a long list of file names in the terminal using echo or print $filename, but what i'd prefer to do (As the infomation isn't that useful to the user - they'd prefer to easily see the operations prior and after the loop in the terminal) is replace the same stdout line with the current filename in the loop.

I've played around with echo $filename \c, but this just appends all the filenames into a list on the same line (messy). how do i first delete the existing text on the current line so that the user only sees the current filename?

I hope you can make sense of my request!

Nick

---------- Post updated at 12:18 PM ---------- Previous update was at 10:42 AM ----------

solved the issue using 'tput dl1'. to delete the line.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Redirecting stdout inside a loop

hi, OK. I am writing a bash script, and it is almost working for me. Problem 1: I currently have stout sent to a file (stout.miRNA.bash.$date_formatted) which I would like to have work inside my loop, but when I move it, it just prints to the screen. Problem 2: I have a second file... (18 Replies)
Discussion started by: hmortens
18 Replies

2. Shell Programming and Scripting

sed command to replace a line in a file using line number from the output of a pipe.

Sed command to replace a line in a file using line number from the output of a pipe. Is it possible to replace a whole line piped from someother command into a file at paritcular line... here is some basic execution flow.. the line number is 412 lineNo=412 Now i have a line... (1 Reply)
Discussion started by: vivek d r
1 Replies

3. Shell Programming and Scripting

Reading line by line from live log file using while loop and considering only those lines start from

Hi, I want to read a live log file line by line and considering those line which start from time stamp; Below code I am using, which read line but throws an exception when comparing line that does not contain error code tail -F /logs/COMMON-ERROR.log | while read myline; do... (2 Replies)
Discussion started by: ketanraut
2 Replies

4. Shell Programming and Scripting

sed command to replace a line at a specific line number with some other line

my requirement is, consider a file output cat output blah sdjfhjkd jsdfhjksdh sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf hellow there this doesnt look good et cetc etc etcetera i want to replace a line of line number 4 ("this doesnt look good") with some other line ... (3 Replies)
Discussion started by: vivek d r
3 Replies

5. Shell Programming and Scripting

I need to know how to replace a line after a pattern match with an empty line using SED

Hi How Are you? I am doing fine! I need to go now? I will see you tomorrow! Basically I need to replace the entire line containing "doing" with a blank line: I need to the following output: Hi How Are you? I need to go now? I will see you tomorrow! Thanks in advance.... (1 Reply)
Discussion started by: sags007_99
1 Replies

6. Shell Programming and Scripting

Method to display a line at the top always, regardless of stdout

Hi Is there way to, say, echo a line and make sure it is always displayed on the first line, no matter what is coming out on stdout? eg: #!/bin/bash clear echo " ...... Internal audit script ......" tar xvf hugefile.tar I'd like to have the " Internal audit script " line to be shown... (2 Replies)
Discussion started by: bludhemn
2 Replies

7. Solaris

Line too long error Replace string with new line line character

I get a file which has all its content in a single row. The file contains xml data containing 3000 records, but all in a single row, making it difficult for Unix to Process the file. I decided to insert a new line character at all occurrences of a particular string in this file (say replacing... (4 Replies)
Discussion started by: ducati
4 Replies

8. Shell Programming and Scripting

STDOUT in one line

Hi all, I got a file which contains this. aaaaaaaaaaaaaaaaaaaaaaaa test aaaaaaaaaaaaaa test aaaaaaaaaaa test aaaaaaaaaaaaaaaaa test aaaaaaaaaaaaaaaaaaaaa test aaaaaaaaa test aaaaa test and I want all test output in one row, ideally 3 spaces after the longest word. Thanks (4 Replies)
Discussion started by: stinkefisch
4 Replies

9. Shell Programming and Scripting

Loop with sed command to replace line with sed command in it

Okay, title is kind of confusion, but basically, I have a lot of scripts on a server that I need to replace a ps command, however, the new ps command I'm trying to replace the current one with pipes to sed at one point. So now I am attempting to create another script that replaces that line. ... (1 Reply)
Discussion started by: cbo0485
1 Replies

10. UNIX for Dummies Questions & Answers

redirect stderr and/or stdout to /dev/null from command line

Is it possible to redirect errors at the command line when you run the script such as bash scriptname & 2>/dev/null? (1 Reply)
Discussion started by: knc9233
1 Replies
Login or Register to Ask a Question

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)