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Old 07-15-2004, 03:53 PM   #1
SheldonPlankton
Member
 
Registered: Jun 2004
Posts: 129

Rep: Reputation: 15
Brain cramp with shell script for loops


Hi

When I do this ...
Code:
bash-2.05b$ cat files
line1
line two
line_thre
bash-2.05b$ for i in `cat files `
> do
> echo $i
> done
... I get this ...
Code:
line1
line
two
line_three
"line two" gets outputted on two lines! What I want is this ...
Code:
bash-2.05b$ cat files
line1
line two
line_three
bash-2.05b$ for i in `cat files `
> do
> echo $i
> done
line1
line two
line_three
I want "line two" to be echo-ed out on one line not two lines.

Last edited by SheldonPlankton; 07-15-2004 at 03:56 PM.
 
Old 07-15-2004, 04:37 PM   #2
jim mcnamara
Member
 
Registered: May 2002
Posts: 964

Rep: Reputation: 34
try
Code:
while read record
do
    echo $record
done < files
 
Old 07-15-2004, 05:09 PM   #3
keefaz
Senior Member
 
Registered: Mar 2004
Distribution: Slackware
Posts: 4,301

Rep: Reputation: 69
Try that :
Code:
bash-2.05b$ IFS="
> "
bash-2.05b$ for i in `cat files`; do
> echo $i
> done
Line1
Line two
Line three
bash-2.05b$ unset IFS
 
Old 07-16-2004, 05:10 AM   #4
gnashley
Amigo developer
 
Registered: Dec 2003
Location: Germany
Distribution: Slackware
Posts: 4,746

Rep: Reputation: 458Reputation: 458Reputation: 458Reputation: 458Reputation: 458
'for' parses using spaces or tabs as separators si it see 'line' 'space' 'two' as two instances.
 
Old 07-16-2004, 06:45 AM   #5
Bebo
Member
 
Registered: Jul 2003
Location: Göteborg
Distribution: Arch Linux (current)
Posts: 553

Rep: Reputation: 30
EDIT: Oops, sorry keefaz, didn't see your IFS

To get the for loop to use newline as the separator, set the IFS variable to newline:
Code:
IFS='
'
or
Code:
IFS=$'\n'

Last edited by Bebo; 07-16-2004 at 06:47 AM.
 
  


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