02-09-2005
Tried it out but still doesn't work.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
When i run the below code :
v_shortfield = ""
if ; then
echo "ravi"
else
echo "kumar"
fi
i am getting output as :
sam.ksh: test: argument expected
kumar
Why i am getting error test:argument expected
and why i am not getting output as "ravi" :confused: (5 Replies)
Discussion started by: rkrgarlapati
5 Replies
2. Shell Programming and Scripting
I am trying to compare two integer variables in the if statement, but i am getting this "test:argument expected".
What am i missing?
Why is the if loop not executing correctly?
trunkPCM="100000";
more $FILE |while read line
do
PCM=`echo $line | awk '{ print $2 }'`
... (4 Replies)
Discussion started by: tan102938
4 Replies
3. Shell Programming and Scripting
dear members,
I am having some difficulties with an automation script that I am writing.
We have equipments deployed over our network that generate status messages and I was trying an automated method to collect all information.
I did a expect script that telnet all devices, logs, asks for... (4 Replies)
Discussion started by: jorlando
4 Replies
4. Shell Programming and Scripting
Im trying to check if a series of directory exists and if not create them, and am having issues. All the instances of test return with the error "test:
#!/bin/bash
location_Parent=~/Documents/sight_of_sound
location_IMG=~/Documents/Sight_of_sound/IMG
location_AUD=~/Documents/Sight_of_sound/AUD... (4 Replies)
Discussion started by: orionrush
4 Replies
5. Fedora
Hi guys,
I am still kinda new to Linux.
Script template I found on the net and adapted for our environment:
#!/bin/sh
#set -x
ADMIN="admin@mydomain.com"
ALERT=10
df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
#echo $output
... (2 Replies)
Discussion started by: wbdevilliers
2 Replies
6. Shell Programming and Scripting
Hello all,
I am trying to figure out why i am getting an error while executing the script...altought it seems like its work...but still get the test arguement error...any help would be appericiate...this script basically connects to any oracle db ( just have to pass db name to it)... (4 Replies)
Discussion started by: abdul.irfan2
4 Replies
7. UNIX for Advanced & Expert Users
Hi All,
I am running the script
VBoxManage list vms |sed 's/"//g' | cut -d " " -f1 > har1out.mytxt
result=`cat har1out.mytxt | grep $1'
echo $result
echo $1
{
if
then
echo pass
else
echo fail
fi (2 Replies)
Discussion started by: harsha85
2 Replies
8. Shell Programming and Scripting
check_build_info_table()
{
if
then
export build_info_table=`sqlplus -s sna/dbmanager <<!
set pagesize 0 heading off feedback off
SELECT DISTINCT TABLE_NAME FROM ALL_TABLES WHERE OWNER = 'XYZ' AND TABLE_NAME = 'MY_TABLE';
exit
!`
... (3 Replies)
Discussion started by: ambarginni
3 Replies
9. UNIX for Dummies Questions & Answers
Hi,
I am trying to write a small script that validates if there exist files that start with a pattern in a given directory. Below is the piece of my script:
#!/usr/bin/ksh
BTFDIR=/opt/ships/temp
if
then
echo 'found'
else
echo 'not found'
fi
When I run this... (2 Replies)
Discussion started by: snvniranjanrao
2 Replies
10. UNIX for Dummies Questions & Answers
Please can you help me understand the significance of providing arguments under sh -s in
> ssh -qtt ${user}@${host} "sh -s "${version}"" < test.sh (4 Replies)
Discussion started by: Sree10
4 Replies
LEARN ABOUT PLAN9
pcap_get_selectable_fd
PCAP_GET_SELECTABLE_FD(3PCAP) PCAP_GET_SELECTABLE_FD(3PCAP)
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 in:
FreeBSD prior to FreeBSD 4.6;
NetBSD prior to NetBSD 3.0;
OpenBSD prior to OpenBSD 2.4;
Mac OS X prior to Mac OS X 10.7;
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), but a simple select() or poll() will not indicate that the descriptor is readable until a full
buffer's worth of packets is received, even if the read timeout expires before then. 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() indicated 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; however, 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(3PCAP), select(2), poll(2)
5 April 2008 PCAP_GET_SELECTABLE_FD(3PCAP)