03-22-2013
@JIM code doesn't work. thank you
@Radoulov your code is work. thank you
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
my data.file:
1 2 3
3 2 1
3 5 8
4 9 11
3 3 30
I sort it by the 3rd column:
sort -k3b,3 data.file I have :
3 2 1
4 9 11
1 2 3
3 3 30
3 5 8
How can I sort the 3rd column with the +n command? (2 Replies)
Discussion started by: bobo
2 Replies
2. Shell Programming and Scripting
Hi, Iam new to unix. I have one input file .
Input file :
ID1~Name1~Place1
ID2~Name2~Place2
ID3~Name3~Place3
I need output such that only first column should change to fixed width column of 15 characters of length.
Output File:
ID1<<12 spaces>>Name1~Place1
ID2<<12... (5 Replies)
Discussion started by: manneni prakash
5 Replies
3. Shell Programming and Scripting
Hi,
This is my input file:
ali 5 usa abc
abu 4 uk bca
alan 6 brazil bac
pinky 10 utah sdc
My desired output:
pinky 10 utah sdc
alan 6 brazil bac
ali 5 usa abc
abu 4 uk bca
Based on the column two, I want to do the descending order and print out other related column at the... (3 Replies)
Discussion started by: patrick87
3 Replies
4. Shell Programming and Scripting
I have an input file like this...
AAAlkalines Energizer
AAAlkalines Energizer
AAAlkalines Energizer
AAAlkalines Sunlight
AAAlkalines Sunlight
AAAlkalines Sunlight
AAAlkalines Energizer
AAAlkalines Energizer
AAAlkalines Energizer
AAASalines ... (7 Replies)
Discussion started by: malcomex999
7 Replies
5. Shell Programming and Scripting
Match column 3 in file1 to column 1 in file 2 and replace with column 2 from file2
file 1 sample
SNDK 80004C101 AT
XLNX 983919101 BB
NETL 64118B100 BS
AMD 007903107 CC
KLAC 482480100 DC
TER 880770102 KATS
ATHR 04743P108 KATS... (7 Replies)
Discussion started by: rydz00
7 Replies
6. Shell Programming and Scripting
dear friends I want to convert four column data to one column data. For example:
from
1, 2, 3, 4
5, 6, 7, 8to
1
2
3
4
5
6
7
8what is the general command for that type of convertion.
thanks (5 Replies)
Discussion started by: rpf
5 Replies
7. Shell Programming and Scripting
Dear All,
I have a data file input.csv like below. (Only five column shown here for example.)
Data1,StepNo,Data2,Data3,Data4
2,1,3,4,5
3,1,5,6,7
3,2,4,5,6
5,3,5,5,6
From this I want the below output
Data1,StepNo,Data2,Data3,Data4
2,1,3,4,5
3,1,5,6,7
where the second column... (4 Replies)
Discussion started by: ks_reddy
4 Replies
8. Shell Programming and Scripting
This is my input file :
# cat list 20130430121600, cucm, location,76,2 20130430121600,cucm1,location1,76,4 20130430122000,cucm,location,80,8 20130430122000,cucm1,location1,90,8 20130430140000,cucm1,location1,87,11 20130430140000, cucm,location,67,9
This is the required output
... (1 Reply)
Discussion started by: Lakshmikumari
1 Replies
9. Shell Programming and Scripting
Input file:
DN63688_c0_g1 DN63688_c0_g1_i1
DN71_c0_g1 DN71_c0_g1_i1
DN63688_c0_g1 DN63688_c0_g1_i2
DN63688_c0_g1 DN63688_c0_g1_i3
DN63688_c0_g1 DN63688_c0_g1_i7
DN134_c0_g1 DN134_c0_g1_i1
DN63688_c0_g1 DN63688_c0_g1_i8
DN63688_c0_g1 DN63688_c0_g1_i9
DN63688_c0_g1 ... (3 Replies)
Discussion started by: perl_beginner
3 Replies
10. Shell Programming and Scripting
How to sort the following output based on lowest to highest BE?
The following sort does not work.
$ sort -t. -k1,1n -k2,2n bfd.txt
BE31.116 0s 0s DOWN DAMP
BE31.116 0s 0s DOWN DAMP
BE31.117 0s 0s ... (7 Replies)
Discussion started by: sand1234
7 Replies
LEARN ABOUT NETBSD
pcap_get_selectable_fd
PCAP_GET_SELECTABLE_FD(3) Library Functions Manual PCAP_GET_SELECTABLE_FD(3)
NAME
pcap_get_selectable_fd - get a file descriptor on which a select() can be done for a live capture
SYNOPSIS
#include <pcap/pcap.h>
int pcap_get_selectable_fd(pcap_t *p);
DESCRIPTION
pcap_get_selectable_fd() returns, on UNIX, a file descriptor number for a file descriptor on which one can do a select() or poll() to wait
for it to be possible to read packets without blocking, if such a descriptor exists, or -1, if no such descriptor exists. Some network
devices opened with pcap_create() and pcap_activate(), or with pcap_open_live(), do not support select() or poll() (for example, regular
network devices on FreeBSD 4.3 and 4.4, and Endace DAG devices), so -1 is returned for those devices.
Note that on most versions of most BSDs (including Mac OS X) select() and poll() do not work correctly on BPF devices;
pcap_get_selectable_fd() will return a file descriptor on most of those versions (the exceptions being FreeBSD 4.3 and 4.4), a simple
select() or poll() will not return even after the read timeout expires. To work around this, an application that uses select() or poll()
to wait for packets to arrive must put the pcap_t in non-blocking mode, and must arrange that the select() or poll() have a timeout less
than or equal to the read timeout, and must try to read packets after that timeout expires, regardless of whether select() or poll() indi-
cated that the file descriptor for the pcap_t is ready to be read or not. (That workaround will not work in FreeBSD 4.3 and later; how-
ever, in FreeBSD 4.6 and later, select() and poll() work correctly on BPF devices, so the workaround isn't necessary, although it does no
harm.)
Note also that poll() doesn't work on character special files, including BPF devices, in Mac OS X 10.4 and 10.5, so, while select() can be
used on the descriptor returned by pcap_get_selectable_fd(), poll() cannot be used on it those versions of Mac OS X. Kqueues also don't
work on that descriptor. poll(), but not kqueues, work on that descriptor in Mac OS X releases prior to 10.4; poll() and kqueues work on
that descriptor in Mac OS X 10.6 and later.
pcap_get_selectable_fd() is not available on Windows.
RETURN VALUE
A selectable file descriptor is returned if one exists; otherwise, -1 is returned.
SEE ALSO
pcap(3), select(2), poll(2)
5 April 2008 PCAP_GET_SELECTABLE_FD(3)