SNP(4) BSD Kernel Interfaces Manual SNP(4)NAME
snp -- tty snoop interface
SYNOPSIS
#include <sys/snoop.h>
int
ioctl(fd, SNPSTTY, &dev);
int
ioctl(fd, SNPGTTY, &dev);
int
ioctl(fd, FIONREAD, &result);
DESCRIPTION
/dev/snp is a snoop device which allows users to attach to any tty and watch activities on it. The kernel must be compiled with device snp,
or the snp module must be loaded, for these devices to be available.
To associate a given snp device with a tty to be observed, open the snp device and a tty device, and then issue the SNPSTTY ioctl on snp
device. The argument passed to the ioctl(2) is the address of a variable of type int, holding the file descriptor of a tty device. To
detach the snp device from a tty use a pointer to a value of -1.
The SNPGTTY ioctl returns information about the current tty attached to the open snp device.
The FIONREAD ioctl returns a positive value equal to the number of characters in a read buffer. Special values defined are:
SNP_OFLOW device overflow occurred, device detached.
SNP_TTYCLOSE tty not attached.
SNP_DETACH snp device has been detached by user or tty device has been closed and detached.
SEE ALSO pty(4), sio(4), kldload(8), watch(8)HISTORY
The snp device first appeared in FreeBSD 2.1. In FreeBSD 8.0 the snp driver was rewritten to work with the replaced TTY subsystem.
AUTHORS
The author of the current implementation is Ed Schouten <ed@FreeBSD.org>. Previous versions of snp were based on code written by
Ugen J.S. Antsilevich <ugen@NetVision.net.il>.
BUGS
This version of snp does not return proper error codes when calling FIONREAD. It also does not allow SNPSTTY to detach itself from the TTY.
BSD November 5, 2008 BSD
Check Out this Related Man Page
TTY(4) Linux Programmer's Manual TTY(4)NAME
tty - controlling terminal
DESCRIPTION
The file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty. It is a syn-
onym for the controlling terminal of a process, if any.
In addition to the ioctl() requests supported by the device that tty refers to, the following ioctl() request is supported:
TIOCNOTTY
Detach the current process from its controlling terminal, and remove it from its current process group, without attaching it to a
new process group (that is, set its process group ID to zero). This ioctl() call only works on file descriptors connected to
/dev/tty; this is used by daemon processes when they are invoked by a user at a terminal. The process attempts to open /dev/tty; if
the open succeeds, it detaches itself from the terminal by using TIOCNOTTY, while if the open fails, it is obviously not attached to
a terminal and does not need to detach itself.
FILES
/dev/tty
SEE ALSO mknod(1), chown(1), getty(1), termios(3), console(4), ttys(4)Linux 1992-01-21 TTY(4)
I need to delete a TTY in my AIX 4.3 system. I have tried using the smit but everytime I try it, there is a message telling me that the device is in use and cannot be changed. How do I take the device "offline", so to speak, so that I can edit the settings and/or delete it.
V/R
Djassi (3 Replies)
Hello,
I have a cron entry:
59 23 * * * . $HOME/.profile;mydate=`date '+%Y%m%d'`;mv filename filename_$mydate
Which works fine interactively, but gives me the following error when it runs in cron:
Your "cron" job on servername
. $HOME/.profile;mydate=`date '+
produced the... (4 Replies)
When I try to format a slice in Solaris 10 I get the follow error :
-bash-3.00# mkfs /dev/dsk/c1d0s5 18877824
Can not determine partition size: Inappropriate ioctl for device
Some format command output:....
AVAILABLE DISK SELECTIONS:
0. c1d0 <DEFAULT cyl 38735 alt 2 hd 64 sec 63>... (2 Replies)
It sure sounds like a simple request....
I need some C code that will enable me to fetch the IP address of the tty attached to the current process.
In short:
char *myIPAddress(void)
{
// somebody help me fill in this part!!
}
-BL:confused: (4 Replies)
Does anyone have a list of error codes when core dumps fail?
What is error 4? I also have another box that does error-2 occasionally.
if anyone has a list of these error codes, it would be appreciated, thanks!
I have the error below:
NOTICE: core_log: ns-admin core dump failed,... (2 Replies)
Hi.
I'm trying to capture traffic with the snoop command using the net expression but I fail when a I've to specify a subnet
ex: 10.201.64/18
Did you know the correct syntax?
I've tried with
snoop -ta -x0 net 10.201.64.0 255.255.192.0
but doesn't match.
Thnx (4 Replies)
Dear all,
Problem goes like this:
I have a shell script which when run manually runs perfectly.
When same script is executed through a job schdeduler I get an error as Inappropriate ioctl for device and the script fails.
This problems seems quite guiling to me.
Any clues are heartly... (11 Replies)
Hello guys,
on my Red Hat machine the /bin/mt status command gives the output dev/tape: inappropriate ioctl for device. This messages comes up after the Server has been rebooted.
Anybody an idea?
Thx
masterofdesaster (8 Replies)
hi all
iam not able use read command in the while loop in the following program
while read line
do
echo $line
echo "enter name"
read name
echo "your have entered $name"
done < work.txt
THE READ COMMAND INSIDE THE WHILE LOOP IS NOT WORKING, IS ANY OTHER WAY TO SOLVE THIS... (7 Replies)
This is the Test_Data.snp file: MEGAUPLOAD - The leading online storage and file delivery service
1. The problem statement, all variables and given/known data:
Problem Set:
Before you get started working with these challenges, be aware that the first challenge is reformatting the test data... (7 Replies)
Hi
I want to write a script for snoop which can do snoop for 30 min and then process should be killed automatically
I am using below codes
#!/usr/bin/ksh
snoop -d igb0 -o /opt/temp/abc.pcap
sleep 1500
kill -9 `ps -ef|grep -i snoop |grep -v grep|awk '{print $2}'`
But process is not... (3 Replies)
Dears,
I am trying to run a bash script to take a snoop on an interface with a certain port for like 5 minute and once the snoop is finished I need to parse the snoop file on unix/solaris without using WIRESHARK or ETHERAL.
the snoop that I will capture will be for DIAMETER Protocol and... (4 Replies)
Sample program tty, this will be get called from my script test_script.
#include <stdio.h>
#include <unistd.h>
#define TTY_NAME_MAX 32
#define STDIN_FILENO 0 /* Standard input. */
int main(void) {
int ret = 0;
char local_device_file;
printf("\npid =... (7 Replies)
Hi!
I have run the following command: snoop -q -d e1000g0 -o /var/tmp/optima0.txt & them I am trying to read the output of it with snoop -i /var/tmp/optima0.txt, which is giving me this: # snoop -i /var/tmp/optima0.txt | more
1 0.00000 AIOPTSVR -> 10.100.4.72 TCP D=1393 S=22 Push... (8 Replies)