Have seen many posts asking similar question. Ca开发者_如何学JAVAn't get it working.
Input looks like:
<field one with spaces>|<field two with spaces>
Trying to parse with awk.
Have tried many variants from excellent posts:
FS = "^[\x00- ]*|[\x00- ]*[|][\x00- ]*|[\x00- ]*$";
FS = "^[\x00- ]*|[\x00- ]*\|[\x00- ]*|[\x00- ]*$";
FS = "^[\x00- ]*|[\x00- ]*\\|[\x00- ]*|[\x00- ]*$";
Still can't get the pipe delimiter to work.
Using CentOS.
Any help?
echo "field one has spaces | field two has spaces" \
| awk '
BEGIN {
FS="|"
}
{
print $2
print $1
# or what ever you want
}'
#output
field two has spaces
field one has spaces
You can also reduce this to
awk -F'|' {
print $2
print $1
}'
Edit
Also, not all awks can take a multi-character regex for the FS
value.
Edit2
Somehow I missed this originally, but I see you are trying to include \x00
in the char classes pre and post of the |
char. I assume you mean for \x00
== null
char? I don't think you're going to be able to have awk
parse a file with null chars embedded. You could prep-rocess your input like
tr '\x00' ' ' < file.txt > spacesForNulls.txt
OR delete them altogether with
tr -d '\x00' < file.txt > deletedNulls.txt
and eliminate that part of your regex. But as above, some awk
don't support regex for the FS
value. And, I don't use the tr
trick very much, you may find that it requires a slightly different notation for the null
char, depending on your version of tr
.
I hope this helps.
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