10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi all,
i need a help for the following query.
Thanks in advance for your valuable time.
i have a main.pl file which has a global variable declared as below.
our myVar=0;
call first.pl script from the main.pl script.
print the value of myVar (the value is still 0 and not 10.)
i have a... (1 Reply)
Discussion started by: hemalathak10
1 Replies
2. Shell Programming and Scripting
Hello.I have been trying to solve the following problem, but to no avail. If anyone could please give me some indications, or anything, it would be amazing.
A C source program and a type name are given. Determine from source,
the list of the global variables having the given type.
For each... (5 Replies)
Discussion started by: Susan78
5 Replies
3. Shell Programming and Scripting
I have made a script that requires another php script for functions.
I need a way so that the required script can read and write the main script's variables.
Best Regards, John Wei
---------- Post updated at 08:54 AM ---------- Previous update was at 08:40 AM ----------
Sorry Guys, EDIT: my... (1 Reply)
Discussion started by: johntzwei
1 Replies
4. Shell Programming and Scripting
Hi there.
I'm writing a function to which I want to pass a global variable. For some reason, it's ignoring the variable.
#!/bin/bash
#####################################
#Variable Declaration
#####################################
CURPATH=`dirname $0`
DEEP=$CURPATH/depth.txt
export... (4 Replies)
Discussion started by: mikesimone
4 Replies
5. Solaris
Hi Guys,
My requirement is I have file called /opt/orahome/.profile in non global zone.
PATH=/usr/bin:/usr/ucb:/etc:/usr/sbin:/usr/local/bin:/usr/openwin/bin:.
export PATH
PS1="\${ORACLE_SID}:`hostname`:\$PWD$ "
export PS1
EDITOR=vi
export EDITOR
ENV=/opt/orahome/.kshrc
export ENV... (1 Reply)
Discussion started by: vijaysachin
1 Replies
6. Programming
Hi,
is it possible in C to allocate dynamically a global variable?? (3 Replies)
Discussion started by: littleboyblu
3 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I hav created a script that calls a sub-script. In both the scripts i called the configuration file. Now i wanted to use a variable that should be used in both script and sub-script files. Actually, i wanted to return a file name and the return status to the script file from the sub-script.... (6 Replies)
Discussion started by: Swapna173
6 Replies
8. Shell Programming and Scripting
Guys, how can I define global variables in sorlaris...cause I lose the values outside the scope.
Rite now wat I do is,I redirect variable value to a file n then get it back outside the function...:o....theres obviously a better way of doing this...I now this is a basic question....but please... (2 Replies)
Discussion started by: qzv2jm
2 Replies
9. BSD
Hello,
how can I define a global variables in KLD?
I would like to define some variables in my KLD and then would like to use them from other KLD.
Thanx (1 Reply)
Discussion started by: int80h
1 Replies
10. Shell Programming and Scripting
Can someone give me "the lecture" on why you shouldn't make all your varables global when programming in perl. I have been doing this but I have heard that it is not a good practice. (3 Replies)
Discussion started by: reggiej
3 Replies
KLD(4) BSD Kernel Interfaces Manual KLD(4)
NAME
kld -- dynamic kernel linker facility
DESCRIPTION
The LKM (Loadable Kernel Modules) facility has been deprecated in FreeBSD 3.0 and above in favor of the kld interface. This interface, like
its predecessor, allows the system administrator to dynamically add and remove functionality from a running system. This ability also helps
software developers to develop new parts of the kernel without constantly rebooting to test their changes.
Various types of modules can be loaded into the system. There are several defined module types, listed below, which can be added to the sys-
tem in a predefined way. In addition, there is a generic type, for which the module itself handles loading and unloading.
The FreeBSD system makes extensive use of loadable kernel modules, and provides loadable versions of most file systems, the NFS client and
server, all the screen-savers, and the iBCS2 and Linux emulators. kld modules are placed by default in the /boot/kernel directory along with
their matching kernel.
The kld interface is used through the kldload(8), kldunload(8) and kldstat(8) programs.
The kldload(8) program can load either a.out(5) or ELF formatted loadable modules. The kldunload(8) program unloads any given loaded module,
if no other module is dependent upon the given module. The kldstat(8) program is used to check the status of the modules currently loaded
into the system.
Kernel modules may only be loaded or unloaded if the system security level kern.securelevel is less than one.
MODULE TYPES
Device Driver modules
New block and character device drivers may be loaded into the system with kld. Device nodes for the loaded drivers are automatically created
when a module is loaded and destroyed when it is unloaded by devfs(5). You can specify userland programs that will run when new devices
become available as a result of loading modules, or existing devices go away when modules are unloaded, by configuring devd(8).
FILES
/boot/kernel directory containing module binaries built for the kernel also residing in the directory.
/usr/include/sys/module.h file containing definitions required to compile a kld module
/usr/share/examples/kld example source code implementing a sample kld module
SEE ALSO
kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kldstat(2), kldunload(2), devfs(5), devd(8), kldload(8), kldstat(8), kldunload(8),
sysctl(8)
HISTORY
The kld facility appeared in FreeBSD 3.0 and was designed as a replacement for the lkm facility, which was similar in functionality to the
loadable kernel modules facility provided by SunOS 4.1.3.
AUTHORS
The kld facility was originally implemented by Doug Rabson <dfr@FreeBSD.org>.
BUGS
If a module B, is dependent on another module A, but is not compiled with module A as a dependency, then kldload(8) fails to load module B,
even if module A is already present in the system.
If multiple modules are dependent on module A, and are compiled with module A as a dependency, then kldload(8) loads an instance of module A
when any of the modules are loaded.
If a custom entry point is used for a module, and the module is compiled as an 'ELF' binary, then kldload(8) fails to execute the entry
point.
kldload(8) returns the cryptic message 'ENOEXEC (Exec format error)' for any error encountered while loading a module.
When system internal interfaces change, old modules often cannot detect this, and such modules when loaded will often cause crashes or myste-
rious failures.
BSD November 8, 1998 BSD