All Questions
Tagged with portability sed
10 questions
2
votes
0
answers
49
views
Does POSIX specify sed -E? [duplicate]
sed uses basic regular expressions (BRE) by default. Some implementations offer an option to switch to extended regular expressions instead.
GNU sed introduced the -r option to do so in version 3.01 ...
- 635
0
votes
3
answers
753
views
sed portability: extended regex vs. backslash
We can write the next command in two ways:
# using extended regex
$ echo foobar | sed -E 's/(foo)(bar)/\2\1/'
barfoo
And:
# using backslashes
$ echo foobar | sed 's/\(foo\)\(bar\)/\2\1/'
barfoo
...
- 12.7k
4
votes
2
answers
6k
views
Is the use of sed's "a" command to prefix a line portable?
I noticed the following interesting behavior:
$ printf '%s\n' line{1..2} | sed $'1a\\\nPREFIX'
line1
PREFIXline2
$
Interestingly, this behavior is only possible for the last command in a Sed script,...
- 37k
3
votes
3
answers
769
views
Is it portable to indent the argument to sed's 'i\' command?
I was under the impression from the POSIX specs for sed that it is necessary to left-align the text on the line following the i\ command, unless you want leading whitespace in the output.
A quick ...
- 37k
1
vote
0
answers
66
views
How can I easily deal with differences between BSD and GNU sed? [duplicate]
BSD and GNU sed have some small differences in what arguments they accept. I just learned that I have to use different command lines when using -i:
sed -i '' # BSD
sed -i # GNU
I solved this with ...
- 9,597
4
votes
3
answers
743
views
Frequency of words in non-English language text: how can I merge singular and plural forms etc.?
I'm sorting French language words in some text files according to frequency with a focus on insight rather than statistical significance. The challenge is about preserving accented characters and ...
user44370
7
votes
2
answers
2k
views
Does `sed` exist in all *nixes?
My application will be running on all versions of Unix-based OS, say, Linux, MacOS, HP-UX, Sun Solaris , OSX, etc.
I'm using the following sed command in a common place to delete the string matched ...
- 71
2
votes
5
answers
12k
views
In-place editing using sed on AIX
Is there any undocumented flag in AIX's sed implementation that allows for in-place editing in the same way as with e.g. GNU sed? The manual shows no flag for this operation, which is one of the most ...
61
votes
7
answers
22k
views
How can I achieve portability with sed -i (in-place editing)?
I'm writing shell scripts for my server, which is a shared hosting running FreeBSD. I also want to be able to test them locally, on my PC running Linux. Hence, I'm trying to write them in a portable ...
- 1,462
8
votes
3
answers
7k
views
How to share a GNU sed script between Linux and Mac OS X
I have a GNU sed script I use on Linux; it is installed at /bin/sed and it seems it contains GNUisms. I have collaborators using Mac OS X. They have installed (non-GNU) sed, located at /usr/bin/sed, ...
- 644