Why Shell code only? A C program to calculate IP-Address related stuff (or about anything on a bit manipulation level) can easily be written in ANSI C which will compile on any platform, and it's quite trivial to do so (was one of my first C assignments in school)
As for the conversion, it would be something like this pseudo-code.
So 10.150.20.1 would be converted to 177605633. Do this for both the IP and the Netmask and do your &-magic. To get something back do:
which will give you the least significant byte first, so you'll probably have to switch them.
I want develop a script which should also check validity of netmask.
e.g.
/etc/netmasks
10.15.20.30 255.255.255.224
How can I check which IP adresses are valid for this netmask?
I think the best is use logical operations.
224 is 1 1 1 0 0 0 0 0
so is valid from 10.15.20.31... (2 Replies)
could you please find a solution for this
a complex command using pipes to Calculate the number of hits per client in Squid log file (access.log), the command should display most active hosts first.
Line example
1197979501.787 1 10.1.14.62 TCP_NEGATIVE_HIT/404 1463 GET http://url
The... (0 Replies)
hi,
I am trying to configure one of my interfaces, but after reboot - i lose the changes to the netmask & broadcast address.
I have added an entry in /etc/netmasks, but it doesnt pick up the new settings. any ideas - much appreciated.
before reboot:
eri0:... (3 Replies)
I have a txt file which now has the following output
Sat Mar 6 04:00:01
Sat Mar 6 04:02:09
processing 585
Sat Mar 6 17:00:01
Sat Mar 6 17:00:58
processing 109
Sun Mar 7 04:00:01
Sun Mar 7 04:00:51
processing 309
Sun Mar 7 17:00:01
Sun Mar 7 17:00:41
processing 48
I want output as... (1 Reply)
Dear all,
Please help me to write a script that can calculate the size of files.
For example: I have a directory which contain thousands of files. I need to know the size of files that their name begin with abc_123
Thank all!! (4 Replies)
hello,
please can you help me.
jj and kk are two numbers which are the result of an sql program.
I would like to calculate the ratio jj/kk*100.
I have done this:
ratio=$((jj/kk * 100)) or ratio=`expr $jj \/ expr $kk) but the result is 0
What can i do?
Thanks for help. (3 Replies)
Hi All,
I have a script which does report the cpu usuage, there are few output parameter/fields displayed from the script. My problem is I have monitor the output and decide
which cpu number (column 2) has maximum value (column 6).
Since the output is displayed/updated every seconds, it's very... (1 Reply)
hello,
I have implemented this command :
tshark -eth0 -T fiels -e frame.time et sip.Request-Line -z sip,stat > test2.txt
the result of this command : test.txt:
Aug 27, 2013 23:06:47.334270000 INVITE
Aug 27, 2013 23:06:47.335045000 SIP/2.0 401 Unauthorized
Aug 27, 2013... (1 Reply)
Hi,
I need to write a bash script that when i enter two ip address, it will calculate summerize address for them.
Examlpe:
192.168.1.27/25
192.168.1.129/25
Result will be:
192.168.1.0/24
can you help me with this script?
I even dont know how to start with it (3 Replies)
Discussion started by: Miron
3 Replies
LEARN ABOUT DEBIAN
alien::package::rpm
Alien::Package::Rpm(3pm) User Contributed Perl Documentation Alien::Package::Rpm(3pm)NAME
Alien::Package::Rpm - an object that represents a rpm package
DESCRIPTION
This is an object class that represents a rpm package. It is derived from Alien::Package.
FIELDS
prefixes
Relocatable rpm packages have a prefixes field.
METHODS
checkfile
Detect rpm files by their extention.
install
Install a rpm. If RPMINSTALLOPT is set in the environement, the options in it are passed to rpm on its command line.
scan
Implement the scan method to read a rpm file.
unpack
Implement the unpack method to unpack a rpm file. This is a little nasty because it has to handle relocatable rpms and has to do a bit
of permissions fixing as well.
prep
Prepare for package building by generating the spec file.
cleantree
Delete the spec file.
build
Build a rpm. If RPMBUILDOPT is set in the environement, the options in it are passed to rpm on its command line.
An optional parameter, if passed, can be used to specify the program to use to build the rpm. It defaults to rpmbuild.
version
Set/get version.
When retreiving the version, remove any dashes in it.
postinst
postrm
preinst
prerm
Set/get script fields.
When retrieving a value, we have to do some truely sick mangling. Since debian/slackware scripts can be anything -- perl programs or
binary files -- and rpm is limited to only shell scripts, we need to encode the files and add a scrap of shell script to make it
unextract and run on the fly.
When setting a value, we do some mangling too. Rpm maintainer scripts are typically shell scripts, but often lack the leading shebang
line. This can confuse dpkg, so add the shebang if it looks like there is no shebang magic already in place.
Additionally, it's not uncommon for rpm maintainer scripts to contain bashisms, which can be triggered when they are ran on systems
where /bin/sh is not bash. To work around this, the shebang line of the scripts is changed to use bash.
Also, if the rpm is relocatable, the script could refer to RPM_INSTALL_PREFIX, which is set by rpm at run time. Deal with this by
adding code to the script to set RPM_INSTALL_PREFIX.
arch
Set/get arch field. When the arch field is set, some sanitizing is done first to convert it to the debian format used internally. When
it's retreived it's converted back to rpm form from the internal form.
AUTHOR
Joey Hess <joey@kitenet.net>
perl v5.14.2 2011-08-05 Alien::Package::Rpm(3pm)