When most of your "perl" is shell statements in backticks, you're fighting the language. Each individual set of backticks is its own independent shell anyway, you might as well use one shell instead of thirty.
Code:
#!/bin/sh
while read LINE
do
# This works for Linux ping.
# Solaris ping just prints 'x is alive' all by itself
# others may vary.
if ping -c 1 $LINE
then
echo "$LINE is alive"
else
echo "Couldn't ping $LINE"
fi
done
I feel your pain, I learned Perl first too, but trying to use it as a shell just makes ugly code -- you'll spend most of your time, effort, and code getting things in and out of shell.
Strip out the perl, keep the shell, and you can do the same job faster in half the code.
You might find it better to process ping's output than nslookup's output, they both look up domain names.
Last edited by Corona688; 03-07-2013 at 06:25 PM..
Hello,
I have a script that monitors files uploaded via ftp. After a successful upload, the file name is written to the pipe.
There is another program that reads this pipe and allows automatically run any program or script ( say test.sh ) to process the newly uploaded file.
cat test.sh... (2 Replies)
I have 2 files. I basically want to search both of them to see if the 1st column ($1) matches and if it matches then check to see if the 2nd column ($2) matches, then execute some code showing the results of the matches.
File 1:
AAA 123
misc blah
BBB 456
CCC 789
File 2:
... (2 Replies)
I don't quite know what I'm doing, so this simple script is proving a challenge.
Here is some pseudo code that doesn't work yet:
if tail -1 "WORKING.txt" >/dev/null | egrep "^NMBR=*" > /dev/null
then
curl -k 'http://www.myserver.com/log.cgi?input=$?'
echo "hi there"
fi
Purpose:... (3 Replies)
Hi,
I have one dir which has N subdirs.For ex:
/home/user/Project_Src
/home/user/Project_Src/Dir_A
/home/user/Project_Src/Dir_A/subdir/sub_dir2
/home/user/Project_Src/Dir_A/subdir/sub_dir3
/home/user/Project_Src/Dir_B
/home/user/Project_Src/Dir_B/Build
i want to create a folder with... (2 Replies)
hi,
i have a service on unix platform, it will generate traces in a particular folder
i want to check using shell script if traces exist, then perform some action else continue to be in loop.
filename is service.tra
can you please help?
thanks (4 Replies)
Hello,
I want to run one (not multiple) action if an element doesn't exist in array.
for example:
@array = (1..10);
foreach $el (@array)
{
if ($el != 11)
{
print "number not found\n";
}
}
the output of this simple script:
number not found (3 Replies)
Hi,
I want to access files from different directories (for example: /home/dir1/file1 , /home/dir2/file2 ...) Like this i have to access these files(file1, file2...). (3 Replies)
Hi All,
I need to create a script to monitor a dir for new files with ext .err and also it should b a non empty files. and perform a action or command .
We have a new ETL application that runs on a linux server, every times a etl fails it creates a .err file or updates the existing .err... (4 Replies)
Hi,
I am new to awk/unix and am trying to put together an awk script to perform an action similar to vlookup between the two csv files.
Here are the contents of the two files:
File 1:
Date,ParentID,Number,Area,Volume,Dimensions
2014-01-01,ABC,247,83430.33,857.84,8110.76... (9 Replies)
Discussion started by: Prit Siv
9 Replies
LEARN ABOUT CENTOS
ares_parse_ptr_reply
ARES_PARSE_PTR_REPLY(3) Library Functions Manual ARES_PARSE_PTR_REPLY(3)NAME
ares_parse_ptr_reply - Parse a reply to a DNS query of type PTR into a hostent
SYNOPSIS
#include <ares.h>
int ares_parse_ptr_reply(const unsigned char *abuf, int alen,
const void *addr, int addrlen, int family,
struct hostent **host);
DESCRIPTION
The ares_parse_ptr_reply function parses the response to a query of type PTR into a struct hostent. The parameters abuf and alen give the
contents of the response. The parameters addr, addrlen, and family specify which address was queried for; they are not used to verify the
response, merely used to fill in the address of the struct hostent. The resulting struct hostent is stored in allocated memory and a
pointer to it stored into the variable pointed to by host. It is the caller's responsibility to free the resulting host structure using
ares_free_hostent(3) when it is no longer needed.
RETURN VALUES
ares_parse_ptr_reply can return any of the following values:
ARES_SUCCESS The response was successfully parsed.
ARES_EBADRESP The response was malformatted.
ARES_ENODATA The response did not contain an answer to the query.
ARES_ENOMEM Memory was exhausted.
SEE ALSO ares_gethostbyaddr(3), ares_free_hostent(3)AUTHOR
Greg Hudson, MIT Information Systems
Copyright 1998 by the Massachusetts Institute of Technology.
25 July 1998 ARES_PARSE_PTR_REPLY(3)