It is too difficult for me without knowing the content of your input data or to debug all those 'cat' and 'grep' commands. My guess is on next line, where I would try to append the condition 'messages.all' to 'NVRM: Xid'
Hi,
I have the following array.
@a=( ,);
and want to
push @a,()
if the 6 is not in the $a.
This is simplified out of a longer script but im trying for days now and get sick of it.
Can any of you help me on this.
Cheers
Markus (1 Reply)
I'm using perl to do a grep of each line in a vendor file and find its occurrences in a specific directory. Any values found is saved in @dir.
.....(file opened, etc.)
....
while ($line=<FILE>){
@dir = `grep $line * `;
}
It's the specific usage of the system grep that I'm having... (7 Replies)
OK here's the situation:
I have got these lines which I have got to parse.
If the line contains a particular string and any element from a previously defined array I need to take that particular line and do some further processing.
if ((grep(/$_/,$1)) && (grep($pattern,@myarr)))
{
#Do... (2 Replies)
Hello
I want to grep a line from a file saved in some directory.
Can anyone please correct the code below:
#!/usr/bin/perl -w
$file = "/home/output.txt"
$grep_line = "closing zip for topic";
`grep $grep_line* $file`; (1 Reply)
Hello:
I butchered a shell script together, but my script kung-fu is 5 years old and all I've used for 5 years are for i loops. I hope that some perl guru can do in 5 minutes what takes me 5 weeks, so I am asking for help.
I have a simple script using "grep -A 2 'string' /path/to/file" but... (4 Replies)
Hi,
I have a huge log file (~5 GB) generated in my server. I have to search through this file for the pattern matching "ERROR" and print only those lines. There is a Perl script available in the server and I have to add a new subroutine so that it will look for this regular expression pattern in... (3 Replies)
Hi,
Can anybody let me know how this grep will work.
The input and output is not known.
Also can you give me the details of any link where i can find clearly about grep
Thanks in advance (1 Reply)
Hi,
i want to create perl script to telnet and print the output. :
This is the script that i have so far :
#!/usr/bin/perl
use lib '/usr/lib/perl5/5.14';
use Telnet ();
$target = "192.168.5.1";
$user = "root";
$passwd = "admin123";
print... (2 Replies)
hello Everyone i am a newbie.
i have a file which contains the following
E:\gtmproj\script\i486_nt\obj\check_geomtools.exe: o:\portsrc\spg\system_1\i486_nt\advapps\TK-2\objmt\winclockmtq.lib
E:\gtmproj\script\i486_nt\obj\check_geomtools.exe:... (12 Replies)
Discussion started by: Rashid Khan
12 Replies
LEARN ABOUT CENTOS
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)