But I think that's wrong because it should have resulted ^ as that's the only punctuation mark not included in the list?!
-dips
I apologize for not trying this out before I posted it.
In a BRE or an ERE special RE characters lose their special meaning when inside a bracket expression, but that is not true in a shell pattern matching expression. I'm glad you were able to figure out what was needed to make it work for you. Even here, the underscore and the asterisk do not need to be escaped.
The output from:
Code:
echo ${TEXT#*[![:alnum:] .,;:\'\"/\(\)_+=~@&*-]}
is correct. The * matched (and discarded):
Code:
This is a sample text with supposedly non-printable character
and the:
Code:
[![:alnum:] .,;:\'\"/\(\)\_+=~@&\*-]
matched and discarded the ^ just leaving
Code:
Y.
in that expansion of $TEXT. The whole point of that expansion is to find a remove one character that is not in the set of characters that you are declaring to be "non-printable" with the non-matching bracket expression. The the if statement comparing the original string and the original string with a non-printable character removed compare equal if and only there are no non-printable characters in the string.
I need to check ftp'd incoming files for characters that are not alphanumeric,<tab>, <cr>, or <lf> characters. Each file would have 10-20,000 line with up to 3,000 characters per line. Should I use awk, sed, or grep and what would the command look like to do such a search? Thanks much to anyone... (2 Replies)
How could I check if a string variable contains at least (or only) 2 characters, and check and make sure that the string does not contain any numeric digits?...I need to know how to do this as simple as possible. and I am using the Ksh shell. Thanks. (1 Reply)
Sometimes obvious things... are not so obvious. I always thought that it was possible to grep non printable characters but not with my GNU grep (5.2.1) version.
printf "Hello\tWorld" | grep -l '\t'
printf "Hello\tWorld" | grep -l '\x09'
printf "Hello\tWorld" | grep -l '\x{09}'
None of them... (3 Replies)
I have been using OKI data Microline printers; models 590 and 591 to print a bar code using the following escape sequence:
\E^PA^H^C00^D^C^A^A^A\E^PB^H
The escape sequence is stored in a unix file which is edited using vi.
Now, we are considering Microline printer model 395C and the bar code... (3 Replies)
cp $l_options $srcdirfile $destdirfile
If i want to check whether there is a non printable character in the variables
$l_options $srcdirfile $destdirfile
how it can be done? (2 Replies)
Hi,
We have a non printable character "®" in our file , we want to remove this character, we tried tr -dc '' < oldfile> newfile but this command is removing all new line entries along with the non printable character and all the records are coming in one line(it is changing the format of the... (2 Replies)
Hi,
in a file, i have records as below:
123|62|absnb|267629
123|267|28728|uiuip
123|567|26761|2676
i want to remove the non printable characters after the end of each record.
I guess there are certain charcters but not visible.
i don't know what character that is exactly.
I used... (2 Replies)
Hi,
I have a huge file (50 Mil rows) which has certain non-printable ASCII characters in it. I am cleaning the file by deleting those characters using the following command -
tr -cd '\11\12\15\40-\176' < unclean_file > clean_file
Please note that I am excluding the following -
tab,... (6 Replies)
02-12-2015
