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sed replacement inplace

 
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# 1  
Old 01-14-2016
Wrench sed replacement inplace
I need to make permanent changes in the file after find and replace using sed.
for this i am using
Code:
sed -i

However this is not working. says
sed: illegal option -- i


I am working on Sun Solaris
HTML Code:
uname -a
SunOS aspsun14 5.10 Generic_150400-13 sun4u sparc SUNW,SPARC-Enterprise
any other work around please ?
Last edited by gotamp; 01-14-2016 at 03:30 AM.. Reason: information was not proper
# 2  
Old 01-14-2016
Redirect sed output to a temp file and rename it to source file like

Code:
sed ... sourceFile > tempFile
mv tempFile sourceFile

# 3  
Old 01-14-2016
Quote:
Originally Posted by anbu23
Redirect sed output to a temp file and rename it to source file like

Code:
sed ... sourceFile > tempFile
mv tempFile sourceFile

If the sed command fails, the above suggestion will destroy the input file.
Code:
sed ... sourcefile > tmpfile && cp tmpfile sourcefile && rm -f tmpfile

will only replace sourcefile if the sed succeeded and it will preserve permissions and links to sourcefile (which might not be important unless there are multiple hard links to sourcefile or the permissions on sourcefile are different from what will be set with your current umask setting).
Last edited by Don Cragun; 01-14-2016 at 04:56 AM.. Reason: Fix typo: s/your what/what/
These 2 Users Gave Thanks to Don Cragun For This Post:
anbu23 RavinderSingh13
# 4  
Old 01-14-2016
Quote:
Originally Posted by gotamp
However this is not working. says
sed: illegal option -- i
This is because -i is a GNU specialty which is not supported with POSIX-compatible versions of sed. It is generally better to avoid such constructs and stick to what the standards offer.

I hope this helps.

bakunin
 
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