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 NETBSD
ipl
IPL(4) Kernel Interfaces Manual IPL(4)NAME
ipl - IP packet log device
DESCRIPTION
The ipl pseudo device's purpose is to provide an easy way to gather packet headers of packets you wish to log. If a packet header is to be
logged, the entire header is logged (including any IP options - TCP/UDP options are not included when it calculates header size) or not at
all. The packet contents are also logged after the header. If the log reader is busy or otherwise unable to read log records, up to
IPLLOGSIZE (8192 is the default) bytes of data are stored.
Prepending every packet header logged is a structure containing information relevant to the packet following and why it was logged. The
structure's format is as follows:
/*
* Log structure. Each packet header logged is prepended by one of these.
* Following this in the log records read from the device will be an ipflog
* structure which is then followed by any packet data.
*/
typedef struct iplog {
u_long ipl_sec;
u_long ipl_usec;
u_int ipl_len;
u_int ipl_count;
size_t ipl_dsize;
struct iplog *ipl_next;
} iplog_t;
typedef struct ipflog {
#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
u_char fl_ifname[IFNAMSIZ];
#else
u_int fl_unit;
u_char fl_ifname[4];
#endif
u_char fl_plen; /* extra data after hlen */
u_char fl_hlen; /* length of IP headers saved */
u_short fl_rule; /* assume never more than 64k rules, total */
u_32_t fl_flags;
} ipflog_t;
When reading from the ipl device, it is necessary to call read(2) with a buffer big enough to hold at least 1 complete log record - reading
of partial log records is not supported.
If the packet contents are more than 128 bytes when log body is used, then only 128 bytes of the packet contents are logged.
Although it is only possible to read from the ipl device, opening it for writing is required when using an ioctl which changes any kernel
data.
The ioctls which are loaded with this device can be found under ipf(4). The ioctls which are for use with logging and don't affect the
filter are:
ioctl(fd, SIOCIPFFB, int *)
ioctl(fd, FIONREAD, int *)
The SIOCIPFFB ioctl flushes the log buffer and returns the number of bytes flushed. FIONREAD returns the number of bytes currently used
for storing log data. If IPFILTER_LOG is not defined when compiling, SIOCIPFFB is not available and FIONREAD will return but not do any-
thing.
There is currently no support for non-blocking IO with this device, meaning all read operations should be considered blocking in nature (if
there is no data to read, it will sleep until some is made available).
SEE ALSO ipf(4)BUGS
Packet headers are dropped when the internal buffer (static size) fills.
FILES
/dev/ipl
IPL(4)