11–14 of 14 posts
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Yes, thank you. Forgot to qualify that -i is only in GNU sed. But I think it is in GNU sed for a reason -- it is a practical shortcut. The only thing I use sed for is to do search and replaces. If the command spanned 2 lines or had pipes and redirects a lot of people just wouldn't remember it.
I agree. It's very practical.
I don't see any use of the 'in-place' -i option. My most useful one-liner: sed -i "s/pat/rep/g" file It means replace in-place all matches of pat with rep in file. To make a backup of old file use -i.bak instead of -i where .bak would be the suffix of the backup file.
Option -i is not defined in POSIX sed. That's probably the reason author didn't include it in his list. I have heard that it's GNU sed option only. (But can't currently say if it's 100% true.)
If I want to edit a stream I use sed
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Option -i is not defined in POSIX sed. That's probably the reason author didn't include it in his list. I have heard that it's GNU sed option only. (But can't currently say if it's 100% true.)
Yes, thank you. Forgot to qualify that -i is only in GNU sed. But I think it is in GNU sed for a reason -- it is a practical shortcut. The only thing I use sed for is to do search and replaces. If the command spanned 2 lines or had pipes and redirects a lot of people just wouldn't remember it.
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There's no reason why this functionality should be in sed when it can be implemented on its own and re-used. IIRC there's an an example script to for that in _The Unix Programming Environment_. Better to use sudo than have everything implement its own sudo-like functionality, etc. See "UNIX Style, or cat -v Considered Harmful" by Rob Pike ( http://harmful.cat-v.org/cat-v/ ) for a longer discussion of this.
In place operations have been implemented as a standalone utility: sponge from moreutils. sed 's/blah/foo/' file | sponge file
s stands for stream
there is no s in ed