Shell Programming and Scripting

Hi everyone

I just need a script that should just search for a particular keyword in a line and after that it should add some text to the next line.

I have tried it in HAMILTON CSHELL using

sed "hello/a\newtext" file.txt

But it give me message

sed: "\" must terminate the "a" command.

Can any one please help me.

Thanks in advance
Sarbjit

Code:

 sed '/hello/a\
 newtext' file  [ this is in the next line]

But when i hit enter it says csh : couldn't find ending ' quote

Actually this thing is working fine on linux os, but i am using hamilton cshell installed on win xp . So i just need to ask is syntax diffferent for hamilton

Hi, I'm the author of Hamilton C shell. The reason for the different behavior under Linux than under my C shell is that I followed the POSIX 1003.2 standard for sed and the other utilities. Linux doesn't, or at least, not always.

Under the POSIX standard, as someone else already pointed out, the text you'd like to add using sed should start on a new line and each embedded newline should be preceded by a backslash. You can do that in a variety of ways.

From the C shell command line, use the ^n escape sequence. (I'm assuming you're using the default Windows-style setting for the escape character.)

65 C% cat > DaysOfWeek
Monday
Tuesday
Wednesday
Thursday
Friday
^Z
66 C% sed '/Friday/a\^nSaturday\^nSunday' DaysOfWeek
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
67 C% _

From the command line, escaping the Enter key. (My C shell doesn't just embed newlines if you type Enter in the middle of a quoted string; you have to escape them.)

67 C% sed '/Friday/a\^
Saturday\^
Sunday' DaysOfWeek
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
70 C% _

In a script:

70 C% cat >AddWeekend
/Friday/a\
Saturday\
Sunday
^Z
71 C% sed -f AddWeekend DaysOfWeek
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
72 C% _

Hope this helps.

Thanks Nicole for your solution , Now i am able to insert / append using hamilton.

-----Post Update-----

HI Nicole,

Is it possible to use same syntax in csh script.

Now my problem is that i need to append a text file using sed. So i make following script, but in this case when i run it , it says that sed \ must terminate a command

#!/bin/csh -f
foreach file (`ls *.txt`)
sed "/Some_Text/a\^n NEW_TEXT" $file
end

Actually i tried the same syntax with proper file name in command prompt and it works there.

Can you please help me.
Thanks

Regards
Sarbjit

-----Post Update-----

Hi Nicole,

I tried the following and then i am able to use sed in csh script.

eg:

sed -f script file.txt

and in script i have written
/SOME TEXT/a\
NEW TEXT

and it works

Now my question is why i am not able to use

sed '/SOME TEXT/a\^n NEW TEXT' file.txt in csh script , but if i use same syntax in hamilton command prompt it works fine.

appreciated your help in advance

Regards
Sarbjit Singh