while read loop preserving leading whitespace Post: 51979

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

ksh - read file with leading spaces

Hi, Could someone has any suggestions on this? When read a line from a file, I need to check the first char in the line, it could be a space or any char. But the leading spaces are removed by read. Thanks.

2. Shell Programming and Scripting

Preserving whitespace in a for loop

I obviously haven't learned my lesson with shell and whitespace. find /path/to/some/where/ -name "*.pdf" | awk '{print $5}'| uniq -d results: some Corporation other Corporate junk firmx Works fine from cmdline but the whitespace turns into another FS in a for loop. for...

3. Shell Programming and Scripting

Whitespace in filenames in for loop in bash script

I'm trying to search all .odt files in a directory for a string in the text of the file. I've found a bash script that works, except that it can't handle whitespace in the filenames. #!/bin/bash if ; then echo "Usage: searchodt searchterm" exit 1 fi for file in $(ls *.odt); do ...

4. Shell Programming and Scripting

Preventing whitespace to be a delimiter in a for loop (bash/sh)

Hi, I have a for loop which iterates over a list of strings, separated by whitespace: $ list="1 2 3" $ for i in $list; do echo $i; done 1 2 3 I now want to introduce some strings containing whitespace themselves ... This is straightforward if I directly iterate over the list: $ for...

5. Shell Programming and Scripting

How to match (whitespace digits whitespace) sequence?

Hi Following is an example line. echo "192.22.22.22 \"33dffwef\" 200 300 dsdsd" | sed "s:$\ *\ $:\1:" I want it's output to be 200 However this is not the case. Can you tell me how to do it? I don't want to use AWK for this. Secondly, how can i fetch just 300? Should I use "\2"...

6. Shell Programming and Scripting

Preserving values with for loop for later use

Below is the issue I am having. I have a few variables which have certain values in them like var1=23 var2=46 var3=78 etc... I want to save these values with the help of a for loop in a single variable so that I can use it later,beacuse a few lines down the script, some of these...

7. UNIX for Dummies Questions & Answers

[Solved] How remove leading whitespace from xml (sed /awk?)

Hi again I have an xml file and want to remove the leading white space as it causes me issues later in my script I see sed is possible but cant seem to get it to work I tried sed 's/^ *//' file.xml output <xn:VsDataContainer id="1U104799" modifier="update"> ...

8. Shell Programming and Scripting

Read line, issue with leading - and {}'s

Heyas With my forum search term 'issue with leading dash' i found 2 closed threads which sadly didnt help me. Also me was to eager to add the script, that i didnt properly test, and just now figured this issue. So i have this code: if ] then while read line do line="${line/-/'\-'}"...

9. Shell Programming and Scripting

[BASH] read 'line' issue with leading tabs and virtual line breaks

Heyas I'm trying to read/display a file its content and put borders around it (tui-cat / tui-cat -t(ypwriter). The typewriter-part is a 'bonus' but still has its own flaws, but thats for later. So in some way, i'm trying to rewrite cat using bash and other commands. But sadly it fails on...

10. Shell Programming and Scripting

REGEX to separate paths by whitespace and do a loop

I am trying to do in a single line to take a list of paths separated by whitespace and then loop thru all the paths that were wrote but my regex is not working, I have echo {3} | sed 's/ //g' | while read EACHFILE do ..... But for some reason is only taking always the first path that I...

LEARN ABOUT OSF1

simple_lock_try

simple_lock_try(9r)													       simple_lock_try(9r)

NAME

       simple_lock_try - General: Tries to assert a simple lock

SYNOPSIS

       #include <kern/lock.h>

       boolean_t simple_lock_try(
	       simple_lock_t slock_ptr );

ARGUMENTS

       Specifies a pointer to a simple lock structure. You can declare this simple lock structure by using the decl_simple_lock_data routine.

DESCRIPTION

       The  simple_lock_try  routine tries to assert a lock with read and write access for the resource associated with the specified simple lock.
       The main difference between this routine and simple_lock is that simple_lock_try returns immediately if the  resource  is  already  locked,
       while  simple_lock  spins until the lock has been obtained. Thus, call simple_lock_try when you need a simple lock but the code cannot spin
       until the lock is obtained.

       To release a simple lock successfully asserted by simple_lock_try, call the simple_unlock routine.

RETURN VALUES

       The simple_lock_try routine returns one of the following values: The simple_lock_try routine successfully asserted the  simple  lock.   The
       simple_lock_try routine failed to assert the simple lock.

FILES

SEE ALSO

       Routines: decl_simple_lock_data(9r), simple_lock(9r), simple_lock_init(9r), simple_lock_terminate(9r), simple_unlock(9r)

       Data Structures: slock(9s)

															       simple_lock_try(9r)