1. Is there a way to count the number of bytes of a variable?
example:
abc@yahoo.com is 13 bytes
2. Cut command only allows one byte for delimiter
example: cut -f1 -d'.'
delimited by period. Is there a way to have two or more characters in the delimiter field?
thanks in adavance.
:) (4 Replies)
Hi All,
I wish to cut an input by using the below command but i would want to have the cut position as a variable.
For eg, the position number is 11 now and i wish that this number is being assigned to a variable before putting into the cut function.
Can this be done ?
Can any expert help?... (1 Reply)
In my server migration requirement, I need to compare if one file on old server is exactly the same as the corresponding file on the new server.
For diff and comm, the inputs need to be sorted. But I do not want to disturb the content of the file and need to find byte-to-byte match.
Please... (4 Replies)
Hi All
Can anyone please suggest me how to remove the last byte from a falt file .This is from the last line's last BYTE.
Please suggest me something.
Thank's and regards
Vinay (1 Reply)
Hi all,
I am new to perl programming. However i have a script that connects to the database and spools that into an output file.
Strange thing is that sometimes this script works and sometimes the ouput spool file is always 0 byte.
I have verified the sql query and the query always returns... (5 Replies)
How to extract multiple data based on character position. I need to fetch from 7-9 and 22-26 and there is no delimiter for 22-26 since it is part of the column. The file may have more than 1000 character long.I managed to pull any one but not both
for example
test data
12345 zxc vbnmlk... (1 Reply)
Hi All,
I am having a huge file file. I need to cut the below column and do the below calculation
I did the below command and able to do on full databased no on the individual based any help on doing each row by row
cut -c 52-56 myfile | awk '{total = total + $1}END{print total}'... (7 Replies)
Hello,
I am on AIX.
When I encounter extended ascii characters and special characters on a file I need to print..
Byte position, actual character and line number.
Is there a simple command that can give me the above result ?
Thanks in advance (38 Replies)
Hi All,
We have a requirement of picking nth position value by using cut command. value would be delimited by any symbols. We have to pass delimited value and postition to get the value in a string.
ex.
echo "A,B,C,D,E" |cut -d "," -f3
echo "A|B|C|D|E"|cut -d "|" -f2
Kindly frame the... (5 Replies)
Discussion started by: KK230689
5 Replies
LEARN ABOUT BSD
unifdef
UNIFDEF(1) General Commands Manual UNIFDEF(1)NAME
unifdef - remove ifdef'ed lines
SYNOPSIS
unifdef [ -t -l -c -Dsym -Usym -idsym -iusym ] ... [ file ]
DESCRIPTION
Unifdef is useful for removing ifdef'ed lines from a file while otherwise leaving the file alone. Unifdef is like a stripped-down C pre-
processor: it is smart enough to deal with the nested ifdefs, comments, single and double quotes of C syntax so that it can do its job, but
it doesn't do any including or interpretation of macros. Neither does it strip out comments, though it recognizes and ignores them. You
specify which symbols you want defined -Dsym or undefined -Usym and the lines inside those ifdefs will be copied to the output or removed
as appropriate. The ifdef, ifndef, else, and endif lines associated with sym will also be removed. Ifdefs involving symbols you don't
specify are untouched and copied out along with their associated ifdef, else, and endif lines. If an ifdef X occurs nested inside another
ifdef X, then the inside ifdef is treated as if it were an unrecognized symbol. If the same symbol appears in more than one argument, only
the first occurrence is significant.
The -l option causes unifdef to replace removed lines with blank lines instead of deleting them.
If you use ifdefs to delimit non-C lines, such as comments or code which is under construction, then you must tell unifdef which symbols
are used for that purpose so that it won't try to parse for quotes and comments in those ifdef'ed lines. You specify that you want the
lines inside certain ifdefs to be ignored but copied out with -idsym and -iusym similar to -Dsym and -Usym above.
If you want to use unifdef for plain text (not C code), use the -t option. This makes unifdef refrain from attempting to recognize com-
ments and single and double quotes.
Unifdef copies its output to stdout and will take its input from stdin if no file argument is given. If the -c argument is specified, then
the operation of unifdef is complemented, i.e. the lines that would have been removed or blanked are retained and vice versa.
SEE ALSO diff(1)DIAGNOSTICS
Premature EOF, inappropriate else or endif.
Exit status is 0 if output is exact copy of input, 1 if not, 2 if trouble.
BUGS
Does not know how to deal with cpp consructs such as
#if defined(X) || defined(Y)
AUTHOR
Dave Yost
4.3 Berkeley Distribution April 29, 1985 UNIFDEF(1)