gamblor01
02-14-2006, 01:16 PM
Hey, I think I can use sed for this, but I haven't figured out exactly how yet. I know how to substitue with sed, it's just sed 's/pattern_to_match/pattern_to_sub/g' to do it globally in a file.
The problem is, what if I want to find all occurences of a function call in a file, and add another function call after it? For example, if I have the following lines in a file....
http_recv("asdf");
more lines....
http_recv("blah");
more
http_recv("foo");
and suppose I want to call a function bar(); after every instance of the call to http_recv so it now looks like this:
http_recv("asdf");
bar();
more lines....
http_recv("blah");
bar();
more
http_recv("foo");
bar();
I can't just do sed 's/http_recv$/bar();/g' because that will overwrite the line starting with http_recv...and I want to keep it there and merely append essentially a \nbar(); to the end of it. Is there a way sed can do that? I was thinking it would be cool if maybe the http_recv$ could become a parameter or something of the -s option, so if I could do like sed 's/http_recv$/$0\nbar\(\);/g' or something that would be really cool where the $0 parameter refers to the pattern that http_recv$ had just matched...but I don't think it's that simple.
I read the man page and it looks like there's an N option to append to the next line, but I can't seem to get the command to work properly on some files I've tested. Anyone know how to do this? Thanks!
The problem is, what if I want to find all occurences of a function call in a file, and add another function call after it? For example, if I have the following lines in a file....
http_recv("asdf");
more lines....
http_recv("blah");
more
http_recv("foo");
and suppose I want to call a function bar(); after every instance of the call to http_recv so it now looks like this:
http_recv("asdf");
bar();
more lines....
http_recv("blah");
bar();
more
http_recv("foo");
bar();
I can't just do sed 's/http_recv$/bar();/g' because that will overwrite the line starting with http_recv...and I want to keep it there and merely append essentially a \nbar(); to the end of it. Is there a way sed can do that? I was thinking it would be cool if maybe the http_recv$ could become a parameter or something of the -s option, so if I could do like sed 's/http_recv$/$0\nbar\(\);/g' or something that would be really cool where the $0 parameter refers to the pattern that http_recv$ had just matched...but I don't think it's that simple.
I read the man page and it looks like there's an N option to append to the next line, but I can't seem to get the command to work properly on some files I've tested. Anyone know how to do this? Thanks!