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Converting from Linux bash (GNU) to Solaris script syntax errors

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Top Forums Shell Programming and Scripting Converting from Linux bash (GNU) to Solaris script syntax errors
# 1  
Old 05-01-2013
Converting from Linux bash (GNU) to Solaris script syntax errors
Original script written on CentOS 6.3 with GNU bash 4.1.2
Destination system is Solaris 9 with GNU bash 2.05 (not changeable by me)

I have a script written on the linux side but now we need to provide a version to another site that "doesn't like linux". I've been going through changing the [[ ]] or (( )) and the == but have really hit a wall with the sed -i.

The script is very quick with the sed -i being used but man is it slow to write to a temp file and them mv back to the primary.

Basically
Code:
while read StaticIP
   do
          grep -w $StaticIP $Full_file > /dev/null
          if [ $? = 0 ]; then
             cat $Full_file |sed "/$StaticIP/d" > tmpfile
             mv tmpfile $Full_file
          fi
   do

This all went very smoothly when i had the if construct like this
Code:
sed -i $StaticIP $Full_file

But now this whole script has gone from 15 - 20 minutes to 2+ hours to run.

I cant use any of the following that i'm used to.
Code:
for i {1..8};   ## this fails takes the {1..8} as static value

grep "^[[:alpha]]"     ## this fails unexpected [

NevVal=$(($myval/$myDivisor))

for ((i=0;i<=10;i++));do somthing;done  ## works cmdline fails in script

# 2  
Old 05-01-2013
Code:
# Some version of sed have an option, -i, that edits the file in situ
# A trick that allows redirection to the same file is:

{ rm FILE; sed -e '...' > FILE; } < FILE

also, make sure that you have #!/bin/bash in your script - to make sure you're using the desired shell interpreter....
# 3  
Old 05-01-2013
Quote:
The script is very quick with the sed -i
being used but man is it slow to write to
a temp file and them mv back to the primary.
I don't believe that. It does not make sense.
sed -i also creates a temp file, behind the scenes.
If you do a test that shows sed -i is faster, could you post?

Using cat here is totally not needed.
Code:
cat $Full_file |sed "/$StaticIP/d" > tmpfile

Instead:
Code:
sed "/$StaticIP/d" $Full_file > tmpfile

More fundamentally, instead of testing with grep, then running sed, try just running grep -v:
Code:
while read StaticIP; do
   grep -v -w $StaticIP $Full_file > tmpfile
   mv tmpfile $Full_file
done

---------- Post updated at 02:01 PM ---------- Previous update was at 02:00 PM ----------

Quote:
grep "^[[:alpha]]"
Should be grep "^[[:alpha:]]"
This User Gave Thanks to hanson44 For This Post:
oly_r
# 4  
Old 05-01-2013
Quote:
Originally Posted by hanson44
I don't believe that. It does not make sense.
sed -i also creates a temp file, behind the scenes.
If you do a test that shows sed -i is faster, could you post?

Using cat here is totally not needed.
Code:
cat $Full_file |sed "/$StaticIP/d" > tmpfile

Instead:
Code:
sed "/$StaticIP/d" $Full_file > tmpfile

^^^ doesn't work, i tried that first
Quote:
Originally Posted by hanson44

More fundamentally, instead of testing with grep, then running sed, try just running grep -v:
Code:
while read StaticIP; do
   grep -v -w $StaticIP $Full_file > tmpfile
   mv tmpfile $Full_file
done

^^^ thanks, using this ( bad thing is i've done this before Smilie)
Quote:
Originally Posted by hanson44

---------- Post updated at 02:01 PM ---------- Previous update was at 02:00 PM ----------



Should be grep "^[[:alpha:]]"
^^^ This is correct in the actual script.
# 5  
Old 05-01-2013
Quote:
cat $Full_file |sed "/$StaticIP/d" > tmpfile

Instead:

Code:
sed "/$StaticIP/d" $Full_file > tmpfile

^^^ doesn't work, i tried that first
Well, there must have been a typo when you tried it, or some other error. The cat $Full_file | is not needed, period.
# 6  
Old 05-01-2013
On Solaris 9 you should use/usr/xpg4/bin/grep instead of grep,

Instead of the first loop, try:
Code:
/usr/xpg4/bin/grep -vwf "$static_ip_file" "$full_file" > newfile




--
( As a side-note: the -w option may not be sufficient, because the dots in the ip address mean "any character" so that means that unintended adresses may be matched. Look into the -F and -x options, but that goes for both the Linux and the Solaris version )
Last edited by Scrutinizer; 05-01-2013 at 04:30 PM..
This User Gave Thanks to Scrutinizer For This Post:
oly_r
# 7  
Old 05-02-2013
Quote:
Originally Posted by Scrutinizer
On Solaris 9 you should use/usr/xpg4/bin/grep instead of grep,

Instead of the first loop, try:
Code:
/usr/xpg4/bin/grep -vwf "$static_ip_file" "$full_file" > newfile




--
( As a side-note: the -w option may not be sufficient, because the dots in the ip address mean "any character" so that means that unintended adresses may be matched. Look into the -F and -x options, but that goes for both the Linux and the Solaris version )

THANKS, Big difference

---------- Post updated at 09:48 AM ---------- Previous update was at 06:46 AM ----------

One of the worst parts of this is that some commands are working on the cmdline but not in the script. I've verified i'm using the same shell in the #! line as i'm working the command line. This is terribly aggravating.
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