There is no standard API for returning this information. You need to use the FIONREAD ioctl if it is available on your platform. Typical code would be something like the following.
Hi,
I have a file that has 300 records with a load of fields. two of them are:
field_1 has between 8-9 bytes i.e. 012345678, 0123456789
field_2 has 10 bytes i.e. 01234567890
I want to be able to echo out the total of each of these fields i.e.
200 (have 8 - 9 bytes)
100 (have 10 bytes)... (3 Replies)
Im using the vmstat command to display the CPU run queue, but i want to put that into a program so is there a way to just display the number under the r?
Thanks, (1 Reply)
Hi,
i have following line in my code.
eport.pl < $4 | dos2ux | head -2000 | paste -sd\| - | awk -v S="$1" '
Issue is, i get a message saying "awk:input line | found /file/path cannot be longer than 3000 bytes."
"source line number is 3"
Can someone help me with this please? (4 Replies)
Hi,
Currently we are experiencing qdaemon died, hourly.
We have more than 10,000 print queue on AIX 5.3.
Would this cause the qdaemon to die?
What is the maximum number of print queue on AIX 5.3?
Thank you in advance. (0 Replies)
1) I need a shell code to count the number of files ( without directories or sub-directories ) in a directory given as arguments I tried this code but it didn't work , maybe I tried the wrong one:
numOfFiles=`find $1 -type f -maxdepth 1 | wc -l`
I found it in another thread in this site..
... (17 Replies)
Guys,
I want to get the high CPU utilization from top.
I am using below code :
top -d2 >> /home/dba_monitoring/host_top_output.txt
echo "Script started `date`" > $runlog
usage=`grep "^ *$1" /home/dba_monitoring/host_top_output.txt | awk '{print $12}' | sed 's/%//'`
And getting below... (7 Replies)
Hi,
I am using the libxml2 sax parser to parse a in memory xml string along with validating it against a schema.
I am using the following code:
xmlSAXHandlerPtr sax_ = new xmlSAXHandler();
sax_->initialized = XML_SAX2_MAGIC;
sax_->startElementNs =... (0 Replies)
I am writing a bash script to find out all the files in a directory which are empty. I am running into multiple issues. I will really appreciate if someone can please help me.
#!/bin/bash
DATE=$(date +%m%d%y)
TIME=$(date +%H%M)
DIR="/home/statsetl/input/civil/test"
... (1 Reply)
Hello guys. I really hope someone will help me with this one..
So, I have to write this script who:
- creates a file home/student/vmdisk of 10 mb
- formats that file to ext3
- mounts that partition to /mnt/partition
- creates a file /mnt/partition/data. In this file, there will... (1 Reply)
hello,
suppose, entered input is of 1-40 bytes, i need it to be converted to 40 bytes exactly.
example: if i have entered my name anywhere between 1-40 i want it to be stored with 40 bytes exactly.
enter your name:
donald duck (this is of 11 bytes)
expected is as below - display 11... (3 Replies)
Discussion started by: shravan.300
3 Replies
LEARN ABOUT FREEBSD
snp
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