Hi There,
I've written a script that processes a data file on our system. Basically the script reads a post code from a list file, looks in the data file for the first occurrence (using grep) and reads the line number. It then tails the data file, with the line number just read, and outputs to a... (3 Replies)
I'm trying to find a command which will allow me to remove a range of lines (2-4) from a .dat file from the command line without opening the file.
Someone mentioned using the ex command?
Does anyone have any ideas?
thanks (6 Replies)
Hi Gurus,
I'm a little new to UNIX. How can I do remove the first and last line in a file? Say, supppose I have a file as below:
1DMA
400002BARRIE
401002CALGARY/LETHBRI
402002CARLETON
500001PORTLAND-AUBRN
501001NEW YORK, NY ... (1 Reply)
Hi Gurus,
I'm a little new to UNIX. How can I do remove the first and last line in a file? Say, supppose I have a file as below:
Code:
1DMA
400002BARRIE
401002CALGARY/LETHBRI
402002CARLETON
500001PORTLAND-AUBRN
501001NEW YORK, NY
502001BINGHAMTON, NY ... (2 Replies)
Hi
Does anybody know of a command that will enable me to remove all entries in a file that have the format (name & time)
more testfile
anthony 2003
anthonyr 2008
amorel 15:00
anthonyp 14:35
anthonyp 14:35
anthonyr 2008
ardean 13:28
arlene 2003
arlenem 08:15
arlenem 08:15... (5 Replies)
Hi
I have many files all with 1 field per line as in
12345
abcde
john.paul.net
6789101
how do I remove ceratin lines from these files.
Have tried sed but sed wrecks my head!
Many thanks in advance for any help (9 Replies)
Hi folks, I have a long string of DNA sequences, and I need to remove several lines, as well as the line directly following them. For example, here is a sample of my starting material:
>548::GY31UMJ02DLYEH rank=0007170 x=1363.5 y=471.0 length=478... (1 Reply)
Hi,
I have a linux server that was hacked and I have a bunch of files that sporadically contain the following lines through out the file:
<?php eval(base64_decode("Xxxxxxxxxxxxxx/xxxxxxxx"));
I did't put the exact lines of the file in this post. The "Xxxx" are random letters/numbers.... (8 Replies)
GM,
I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed.
I am assuming that sed, awk or even perl could do what I need.
I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Discussion started by: jxfish2
7 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)