Sponsored Content
Full Discussion: Piping output to while read
Top Forums Shell Programming and Scripting Piping output to while read Post 90729 by Perderabo on Saturday 26th of November 2005 09:38:23 PM
Old 11-26-2005
Just tried it and you're right, ZB. bash loses variable assignments in loops under this condition. pdKSH does too. Apparently ksh alone can handle this situation.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

piping output to echo

Hi, I was wondering why ls * | echo does not print the contents of the directory to the screen? The way I see it, ls * returns a whole lot of information, and then we pipe all this info to echo, so surely it should all come to our screen! Is there a serious flaw in my understanding? ... (3 Replies)
Discussion started by: A1977
3 Replies

2. Shell Programming and Scripting

piping output of tail running in background

Not sure why this does not work in bash: tail -f err.log |& -bash: syntax error near unexpected token `&' I am attempting to continuously read a file that is being updated by doing a "tail -f" on the file and piping the output to stdin which can then be read by the next shell command Thnx (4 Replies)
Discussion started by: anuramdas
4 Replies

3. Shell Programming and Scripting

piping oracle output to a file?

Hi All... Does anyone know how to pipe the output of a "select" statement from a call to Oracle to a file? ANy ideas woule be greatly appreciated! Code is as below... echo "producing CSV file 2..." sqlplus -s $username/$password@$database<<EOF set serveroutput on size 1000000 set... (13 Replies)
Discussion started by: satnamx
13 Replies

4. Shell Programming and Scripting

piping output from PHP file into variable

Hi. I have a script like so: #!/bin/bash download='php /var/www/last.php' echo $download if $downloadHow do I pipe the output of the php file into a variable, as when i run the if statement, it just echos the file output to the screen and does not actually consider the output (it will be... (2 Replies)
Discussion started by: daydreamer
2 Replies

5. Shell Programming and Scripting

Piping and assigning output to a variable in Perl

Hi All, I am trying to convert the below Csh code into Perl. But i have the following error. Can any expert help ? Error: ls: *tac: No such file or directory Csh set $ST_file = `ls -rt *$testid*st*|tail -1`; Perl my $ST_file = `ls -rt *$testid*st*|tail -1`; (10 Replies)
Discussion started by: Raynon
10 Replies

6. Shell Programming and Scripting

Piping through commands read as variables from file

This is going to be part of a longer script with more features, but I have boiled it down to the one thing that is presently stumping me. The goal is a script which checks for updates to web pages that can be run as a cron job. The script reads (from a tab-delim file) a URL, an MD5 digest, and an... (1 Reply)
Discussion started by: fitzwilliam
1 Replies

7. Shell Programming and Scripting

[Solved] Help piping tail to read STDIN

Hello everybody, I need some help here. I have a log file that gets updated every hour approximately. I want to make some processing on each line which is added in the log file with a program written in PERL. The problem is that I don't see anything when a line is added in the log file. I... (6 Replies)
Discussion started by: Samb95
6 Replies

8. Shell Programming and Scripting

need help piping the output from an app... uh, yeah...

Ok, so there is a perl script that runs as a server, on my local host. It tells me which port to use. I want to pipe that output into my browser so I can do the whole thing with a single command. The problem is, I think, that the program doesn't actually exit cause it's running a server, so...... (6 Replies)
Discussion started by: ninjaaron
6 Replies

9. Shell Programming and Scripting

Piping output of ls to a text file

Basically I was wondering if any of you know how to pipe the output of ls to a text file? so in my shell script one of the lines is ls but i want to pipe it into a file called directory listing. Cheers. I have tried ls | Directorylisting.txt but it keeps saying " line 7: DirectoryListing.txt:... (9 Replies)
Discussion started by: LinuxNubBrah
9 Replies

10. Shell Programming and Scripting

Abnormality while piping tr command output to sed

i have a file seperated each line seperated by newline. For example alpha beta gamma i am trying to replace the newlines to "," but dont want , present at the end of the line so i am trying the below one liner . but not sure whats wrong but its not working cat myfile | tr -s '\n' ',' | sed... (9 Replies)
Discussion started by: chidori
9 Replies
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)
All times are GMT -4. The time now is 11:57 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy