Alternative for sed -i

Original Message

Name: gounix
Date: May 3, 2007 at 04:51:23 Pacific
Subject: Alternative for sed -i
OS: sun os
CPU/Ram: 1
Model/Manufacturer: 1

Comment:

Hi All,
My SUn UNIX doesn't support "-i" option for sed which edits file in place
I don't want to use intermidiate temp file to delete lines from file & write the same into original file
e.g.
I don't want
sed '/text/d' file1 > temp
mv temp file1
I am looking for alternative for
sed -i '/text/d' file1
Kindly replay if anybody has solution

Report Offensive Message For Removal

Response Number 1

Name: nails
Date: May 3, 2007 at 06:57:51 Pacific
Subject: Alternative for sed -i

Reply: (edit)

Perl supports editing in place.

Report Offensive Follow Up For Removal

Response Number 2

Name: James Boothe
Date: May 3, 2007 at 10:25:42 Pacific
Subject: Alternative for sed -i

Reply: (edit)

ed file1 << !
/text/d
w
!

Report Offensive Follow Up For Removal

Response Number 3

Name: gounix
Date: May 7, 2007 at 02:13:47 Pacific
Subject: Alternative for sed -i

Reply: (edit)

Thanks nails & james.
But what i am looking for is -
I have, say 3 functions which runs in background
All functions are editing single text file to insert/update one line of record.
If i use perl , then i can not delete line from it as i am serching apttern first & deleting whole line.
Other option i tried is sed && mv
But again it is creating problem as text file gets overwirtten
If anybody can help me further?
Thanks

Report Offensive Follow Up For Removal

Response Number 4

Name: nails
Date: May 7, 2007 at 14:12:08 Pacific
Subject: Alternative for sed -i

Reply: (edit)

By this statement "3 functions runs in background" I'm assuming you have 3 different shell scripts or programs operating on the same text file.
The only way I can see that this will work is if one job finishes before the next one starts. In Unix, this functionality is implemented with a semaphore - something not normally implemented in shell scripts.
You might want to check out "Implementing Semaphores in the Shell":
http://www.samag.com/documents/s=92...
Maybe a semaphore can help you out.
There's a companion article that builds on top of the semaphore article called "Queuing jobs with qjobs":
http://www.samag.com/documents/s=98...

Report Offensive Follow Up For Removal

Response Number 5

Name: gounix
Date: May 7, 2007 at 22:11:04 Pacific
Subject: Alternative for sed -i

Reply: (edit)

Thanks nail..
But i have 3 functions in same shell script.
Okay ..i will check the given links
in meantime can you please tell me whats wrong in below line.
Bcoz it seems to solve my purpose
#!/usr/bin/bash
RUN=R1
filename=f1
perl -p -i -e 's/qq{$RUN}/\|\d\d\d\d\|[A-Z]*/R3/i' $filename
I am expecting $RUN to be expanded by shell
Also plz note my file f1 is like this
R1|1000|SUCCESS
and i am replacing it by
R3
Thanks again

Report Offensive Follow Up For Removal


Equivalent perl script for sed alternative for awk ' substr ' need help for sed joining lines with sed Unix Sed - inserting new lines	UNIX Sed remove add sed awk question Remove all \n in sed Sed and IP addresses... sed problem with regular expression

Response Number 6

Name: gounix
Date: May 10, 2007 at 03:11:10 Pacific
Subject: Alternative for sed -i

Reply: (edit)

hey ! i got the solution & its working
perl -p -i -e "S/$RUN/\|\d\d\d\d\|[A-Z]*/R3/i" $filename
Thanks

Report Offensive Follow Up For Removal