Both versions worked fine. Why do you write IFS=$'\n' ? It worked for me without the $. But shouldn't now a newline be used to split the fields? (There's no newline in the variable.)
$'\n' is a way to denote a hard newline character. When this variable is set before the unquoted variable expansion of filesToShow, the variable is split into fields depending on the newline character.
After the assignment filesToShow=`ls -Q` there are certainly newlines present in the variable.
If you use IFS='\n' then the content of variable is field split on the n character or the backslash character. So if there happen to be no n-characters or \-characters then the variable will be split into a single field, that gets printed in a a single for loop iteration. What is then printed may look the same, but the process is entirely different..
To illustrate:
Code:
$ IFS='\n'; for file in $filesToShow ; do echo "new line: $file"; done
new line: file 1
file 2
file
new line: umber 1
file
new line: umber 2
file
new line: umber 3
$ IFS=$'\n'; for file in $filesToShow ; do echo "new line: $file"; done
new line: file 1
new line: file 2
new line: file number 1
new line: file number 2
new line: file number 3
--
Note1: $'\n' only works in modern shells is also not a standard feature (like is the case with arrays). A portable alternative would be to assign like this:
Code:
IFS="
"
Note2: it is better to use filesToShow=$(ls -Q) instead of the outdated backticks method.
Last edited by Scrutinizer; 09-24-2018 at 01:36 PM..
I am testing a ksh script for email. In the script I receive several parameters. One of them is a subject. The subject may contain spaces. Ex. Test this. When I am running the script on telnet to test, how should the syntax at the command line be written. I have this:
ksh ResendE.sh '001111'... (2 Replies)
I have a problem with the script below
#!/bin/sh
for vo in `find -maxdepth 1 -type f -regex "^\./*$"`
do
ls -l "$vo"
some other commands
done
It works fine until `find ...` returns files with spaces. I've tryed to change IFS but haven't succeed
Any solutions? (4 Replies)
I'm trying to do something like that:
for $filename in `ls -1`
do
some_command $filename
done
but it doesn't work properly for file names with spaces, for...in splits at spaces. Anyway around? (4 Replies)
I have files on my unix boxes that users have created with spaces.
Example: /tmp/project plan
ls -l "/tmp/project plan" works fine.
$/tmp>ls -l "/tmp/project plan"
-rw-r--r-- 1 root other 0 Jan 31 12:32 /tmp/project plan
I created a file called test and put just the... (2 Replies)
Hi All,
I see similar problems in past threads but so far no answers have worked for me. I am trying to write a script which parses a txt file that contains one filename per line, then finds those files on the local disk and copies them to a specified directory.
What I have:
... (4 Replies)
Hi
I hope someone will be able to resolve this little teaser!
I am running a script
for file in `ls directory`
do
echo "$file"
...other code here....
done
this works fine unless we receive a file with a name which has a space in it
ie
"filena me"
(I know its not good... (8 Replies)
I want to ftp all the sh files in the directory. Also if any of the file name
contains spaces in them, it should be converted to underscores before it is ftped. I wrote the following code below:
FILESSH=$(ls /mysh/*.sh)
--- FILESH being used here for some other task ---
echo "$FILESSH" |... (3 Replies)
Hi,
I am trying to replace a specific column values in a csv file with double quotes when I am find embedded spaces with in the fields.
Example:
SNO,NAME,ZIPCODE,RANK,SEX,ADDRESS
1,Robert,74538,12,34, M,Robert Street, NY
2,Sam,07564,13,M,12 Main Ave, CA
3,Kim, Ed,12345,14,M,123D ,... (1 Reply)
Hey there, this is my first post and I'll try to explain my situation as best I can.Here is a sample of the input file:
ADO Sample.h,v ADO Sample 2010-05-21 lyonsb /repository/patents/TSCommon/OpenSource/Dundass/ug6mfc/DataSources/Ado/ADO Sample
ADO SampleDoc.h,v ADO SampleDoc 2010-05-21... (3 Replies)
I have a problem mounting images because of the spaces in the filenames. Does anyone know how to rename files by removing the spaces with the find command?
find Desktop/$dir -name "*.dmg" -print -exec ??? (4 Replies)
Discussion started by: ianebaj
4 Replies
LEARN ABOUT CENTOS
split
split(n) Tcl Built-In Commands split(n)
__________________________________________________________________________________________________________________________________________________NAME
split - Split a string into a proper Tcl list
SYNOPSIS
split string ?splitChars?
_________________________________________________________________DESCRIPTION
Returns a list created by splitting string at each character that is in the splitChars argument. Each element of the result list will con-
sist of the characters from string that lie between instances of the characters in splitChars. Empty list elements will be generated if
string contains adjacent characters in splitChars, or if the first or last character of string is in splitChars. If splitChars is an empty
string then each character of string becomes a separate element of the result list. SplitChars defaults to the standard white-space char-
acters.
EXAMPLES
Divide up a USENET group name into its hierarchical components:
split "comp.lang.tcl.announce" .
-> comp lang tcl announce
See how the split command splits on every character in splitChars, which can result in information loss if you are not careful:
split "alpha beta gamma" "temp"
-> al {ha b} {} {a ga} {} a
Extract the list words from a string that is not a well-formed list:
split "Example with {unbalanced brace character"
-> Example with {unbalanced brace character
Split a string into its constituent characters
split "Hello world" {}
-> H e l l o { } w o r l d
PARSING RECORD-ORIENTED FILES
Parse a Unix /etc/passwd file, which consists of one entry per line, with each line consisting of a colon-separated list of fields:
## Read the file
set fid [open /etc/passwd]
set content [read $fid]
close $fid
## Split into records on newlines
set records [split $content "
"]
## Iterate over the records
foreach rec $records {
## Split into fields on colons
set fields [split $rec ":"]
## Assign fields to variables and print some out...
lassign $fields
userName password uid grp longName homeDir shell
puts "$longName uses [file tail $shell] for a login shell"
}
SEE ALSO
join(n), list(n), string(n)
KEYWORDS
list, split, string
Tcl split(n)