Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

ifmcstat(8) [netbsd man page]

IFMCSTAT(8)						    BSD System Manager's Manual 					       IFMCSTAT(8)

ifmcstat -- dump multicast group management statistics per interface SYNOPSIS
The ifmcstat command dumps multicast group information in the kernel. There are no command-line options. BSD
October 14, 2000 BSD

Check Out this Related Man Page

IFMCSTAT(8)						    BSD System Manager's Manual 					       IFMCSTAT(8)

ifmcstat -- dump multicast group management statistics per interface SYNOPSIS
ifmcstat [-i interface] [-f address-family] [-v] [-K] [-M core] [-N system] DESCRIPTION
The ifmcstat command dumps multicast group information from the kernel. The following options are supported: -i interface specifies the interface to be displayed. -f address-family specifies the address family to be displayed; inet, inet6 and link are supported. -v specifies that link-layer memberships should be printed; they are suppressed by default. It may not be specified for -f link. Source lists for each group will also be printed. If specified twice, and kvm(3) is in use, the control plane timers for each interface and the source list counters for each group will also be printed. The following options are only available if ifmcstat has been built with support for kvm(3): -K attempts to use kvm(3) to retrieve the multicast group information. -M core extracts values associated with the name list from the specified core, instead of the default /dev/kmem. -N system extracts the name list from the specified kernel instead of the default, which is the kernel image the system has booted from. IMPLEMENTATION NOTES
ifmcstat will always print the embedded scope IDs of IPv6 multicast group memberships. This is because memberships are always scoped to an interface. When run with the -v option, ifmcstat may print multicast MAC addresses twice if they are referenced by a layer 3 protocol. When run with kvm(3) support, the names of all interfaces configured in the system will be printed in the first column of output, even if no multicast group memberships are present on those interfaces. The output may also be slightly different, as the kernel data structures are being traversed with minimal post-processing of the output. When built without kvm(3) support, the information displayed by ifmcstat is more limited. This support is recommended for debugging pur- poses. It requires super-user privilege if used to inspect a running kernel. SEE ALSO
netstat(1), getifaddrs(3), getifmaddrs(3), kvm(3) BSD
May 27, 2009 BSD
Man Page

13 More Discussions You Might Find Interesting

1. Tips and Tutorials

Unix File Permissions

Introduction I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls: $ ls -ld /usr/bin /usr/bin/cat drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin -r-xr-xr-x 1 bin bin ... (6 Replies)
Discussion started by: Perderabo
6 Replies

2. Shell Programming and Scripting

sorting left-justified numeric values

I have a file which looks roughly like this: 996 mmmmmmm 996 xxxxxxxxxxxxx 99600 ssssssssss 9964 fffffffffffff and would like to sort it numerically on the first field. I tried: sort -nr --key=1 .... The output I get is: 99600 ssssssssss 9964 ... (3 Replies)
Discussion started by: rovf
3 Replies

3. Programming

Memory Leaks

Suppose I have a main() function with only one malloc statement allocating say some 1 gb memory. Also say my system has 1 gb of ram. main() { malloc(1gb) return(0) } The program above exits without freeing the memory. In this case will the 1 gb of heap memory be returned... (9 Replies)
Discussion started by: rupeshkp728
9 Replies

4. Solaris

How to install PGX32 on Sparc 10 Ultra?

I'm trying to install a PGX32 video card on my Sparc 10 Ultra running Solaris 10. I've got the Oracle installation guide for it and I got as far as: "4. Insert the CD-ROM labeled “GFX OpenWindows for Solaris 2” into the drive." I don't have a CD-ROM by that name and a web search for that... (21 Replies)
Discussion started by: Michele31416
21 Replies

5. Shell Programming and Scripting

Better to Use Return Code or wc -l Output?

Hey All, Quick question... I'm writing a short script to check if a continuous port is running on a server. I'm using "ps -ef | grep -v grep | grep processName" and I was wondering if it was better/more reliable to just check the return code from the command or if its better to pipe to... (12 Replies)
Discussion started by: mrm5102
12 Replies

6. Shell Programming and Scripting

Vm versus physical linux server

Does anyone have a script that can be run to tell you if you are on either a VM Linux or a physical Linux server? (15 Replies)
Discussion started by: bigbenn
15 Replies

7. BSD

NetBSD 6.1.2: apm and admd not found

I installed NetBSD 6.1.2 amd64 and can't find the apm utility. Is it not in the base system? Is it necessary to recompile the default amd64 kernel to use apm? Or is there a new method for power management and suspend/resume? (2 Replies)
Discussion started by: bsdx
2 Replies

8. Shell Programming and Scripting

RFC - Korn shell prompt

Hi, I am learning shell scripting for the first time. I use AT&T Korn Shell, Version AJM 93u+ 2012-08-01, compiled from source on NetBSD. So far I have managed to set up what I think is a useful and pleasing shell prompt, which can be seen in the image attached to this post. The prompt is... (2 Replies)
Discussion started by: gezley
2 Replies

9. Shell Programming and Scripting

Make bold chars in UNIX

Hi all, I want to make the string as bold in unix. is there any way to acheive this? thanks in advance. (16 Replies)
Discussion started by: SekhaReddy
16 Replies

10. Shell Programming and Scripting

Adding a List of Times

Hey gang, I have a list of times I need to sum up. This list can vary from a few to a few thousand entries. Now I had found a closed reference to adding time titled "add up time with xx:yy format in bash how?" In it, the example works great for that formatted list of times... This is the reply code... (5 Replies)
Discussion started by: Brusimm
5 Replies

11. UNIX for Beginners Questions & Answers

BSD Unix Toolbox: 1000+ Commands for FreeBSD, OpenBSD, and NetBSD

Usually when I on the evening go to bed I take some interesting book with me. I read it for a while to get me down to sleep. Probably most people seek information from the Nett by googleing but I am so oldfashioned I prefer a real book ;) But what a book. The one I found and ordered is BSD Unix®... (0 Replies)
Discussion started by: fossiili
0 Replies

12. UNIX for Beginners Questions & Answers

Grandpa returning to UNIX

On the late 1960s I got short hands on experience with a russian "small" computer. It vas a copy of DEC's VAX ... and running some version of BSD-Unix. After that I worked in a university following the development of computing. After retire I started collecting old pc's and installing... (13 Replies)
Discussion started by: fossiili
13 Replies

13. UNIX for Beginners Questions & Answers

Grep command to show the number of results

Hi I wanted to know if there is an option in grep command to show the number of results (not the number of lines of findings). Thanks (14 Replies)
Discussion started by: abdossamad2003
14 Replies