34.23 sed Newlines, Quoting, and Backslashes in a Shell Script

Feeding sed ( 34.24 ) newlines is easy; the real trick is getting them past the C shell.

The sed documentation says that in order to insert newlines in substitute commands, you should quote them with backslashes. [Surround the commands with single quotes ( ' ), as Chris has. If you use double quotes ( " ), this script will become s/foo/bar/ because of the way quoting works with backslashes and newlines ( 8.14 ) . -JP ]:

sed -e 's/foo/b\
a\
r/'

Indeed, this works quite well in the Bourne shell, which does what I consider the proper thing ( 8.14 ) with this input. The C shell, however, thinks it is smarter than you are ( 47.2 ) , and removes the trailing backslashes ( 8.15 ) , and instead you must type:

sed -e 's/foo/b\\
a\\
r/'

Probably the best solution is to place your sed commands in a separate file ( 34.2 ) , to keep the shell's sticky fingers off them.