replace a string in a file using a script with path containig /

vimalraj · 02-26-2010, 01:41 AM

Hi all,

i need to replace a string in a file(startup.sh) using a script(parser.sh).

contents of startup.sh
mount -t nfs -o nolock 192.168.44.46:NFS_SERVER_LOCATION` /nfs
contents of startup.sh
sed -i s/NFS_SERVER_LOCATION/`echo $NFS_LOCATION`/ ./startup.sh

after running parser.sh startup.sh should be filled with nfs path like /home/vimal etc
but im getting error since path contains /. how to remove this

--

Thanks and Regards,

Vimal

GrapefruiTgirl · 02-26-2010, 01:46 AM

Two Three tips that may help:

1) Put your sed command within double-quotes, like: sed "s/blah/blah"

and

2) you probably do not really want to be using that echo statement within backticks; why not simply put the variable itself in there?

and

3) Since there are slashes within the path (the variable) you will need to use a delimiter in your sed statements that is NOT a slash; consider maybe a % sign, or a pipe | symbol.

Sasha

i92guboj · 02-26-2010, 04:18 AM

If you use bash you could even do this:

Code:

$ foo="/old/uncle/doe"
$ echo "${foo/uncle/uncle/john/moo/cow}"
/old/uncle/john/moo/cow/doe

Sasha's solution is more portable, and is the one you should be using if you put #!/bin/sh in the header of your script. You can use almost anything in place of '/' in sed, that gives you quite a lot of freedom when dealing with strange strings.

vimalraj · 02-27-2010, 12:15 AM

Thanks sasha nd all.
I tried % as delimitter and it worked (sasha's tip no 3). i tried tip no 1, it was giving some error.
Thanks one more time. your quick reply helped me to incorporate that script in release.