redirect split output

Question

I split a gz file using gunzip piped to split:

time gunzip -c file.gz | split -l 500 -d -a 4 - pref_

Which generates the following files:

pref_0000 
pref_0001

I'd like to pipe those files to zip them again. I tried the following:

gunzip -c file.gz | split -l 500 -d -a 4 - pref_ | echo "file produced:" -
# Nothing

gunzip -c file.gz | split -l 500 -d -a 4 - pref_ | echo -
gunzip -c file.gz | split -l 500 -d -a 4 - pref_ | echo

Those do not work, how can I get an output from the split command? I expect to get the produced file names.

[How do I split to stdout for piping to a command?](http://unix.stackexchange.com/q/125649) — don_crissti, May 17 '16 at 17:02

score 3 · Accepted Answer · answered May 17 '16 at 16:52

3

You could use the --filter option of split to invoke zip on each split file

gunzip -c file.gz | split -l 500 -d -a 4 - pref_ --filter='zip $FILE'

answered May 17 '16 at 16:52

iruvar

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I am sorry but my split does not have any option named filter. When I try it it says: `split: unrecognized option '--filter=gzip $FILE'` . Is it amatter of version? When I run `split --help` I cannot see any filtering option. – kaligne May 19 '16 at 10:42
@user3298319, ah you're probably missing gnu split – iruvar May 19 '16 at 12:06
1

it's strange because I have already installed gnu coreutils on my mac: `brew install coreutils`. – kaligne May 19 '16 at 13:00
@user3298319, i have access to two versions of GNU `split`. V 8.24 supports `--filter`, V 5.97 does not. So I'm guessing it's about the version – iruvar May 19 '16 at 15:07
@iruvar How can I find my version of `split`? I have the same problem, and installed `split` with the same command. But my error is, `split: illegal option -- -` :D – Alex Jun 29 '17 at 20:07
@alex, are you on a Mac? – iruvar Jun 29 '17 at 20:51
@iruvar Yes, I am. – Alex Jun 29 '17 at 20:55
@alex, could be one of two things, you're missing GNU split in which case `brew install coreutils` should do the trick as long as you make sure GNU split takes path precedence over the default split. Alternately you could have an older version of GNU split – iruvar Jun 29 '17 at 21:30

redirect split output

1 Answers1