10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi I am trying to learn shell script and i ran into an issue.
I am trying to read a file with few directories and tar them up.
I used a while loop but i end up overwriting tar file with only the last directory in the file being tared .
cat test.txt |
(
while read line
do
tar -czPf... (8 Replies)
Discussion started by: SPR
8 Replies
2. IP Networking
hi there
so, i was given an assignment: implement a linux system call that blocks all packets that are sent to a given IP (i have to do it without using iptables)
i'm really new to kernel programming btw (and i'm enjoying it a lot)
so, my syscall is called ip_block() and receives a... (1 Reply)
Discussion started by: lgfaria
1 Replies
3. UNIX for Dummies Questions & Answers
Hi All,
I recently downloaded the Linux kernel source code, added them all to a project in MS VC++ and plan to read through it so that I can improve the way I code, read/understand a large code database and hopefully contribute something to the development of the Linux OS.
I have taken a... (3 Replies)
Discussion started by: clavian
3 Replies
4. UNIX for Dummies Questions & Answers
Hi,I'm new here and to Unix also. I'm totall newbie.
Here is what I have to do:
-Basics of programming user interface with Xlib library
-Xlib
-Client/Server model of X-Windows system
-Example of "Hello world" with button which changes text ,so that when u click displays another... (4 Replies)
Discussion started by: megane16v
4 Replies
5. Shell Programming and Scripting
Hi,
I am new to programming and also to perl..But i know 'perl' can come to my rescue, But I am stuck at many places and need help..any small help is much appreciated... below is the description of what i intend to acheive with my script.
I have a files named in this format... (13 Replies)
Discussion started by: xytiz
13 Replies
6. Shell Programming and Scripting
Hello everyone,
I am having to do a lot of perl scripting these days and I am learning a lot.
I have this problem
I want to move files from a folder and all its sub folders to one parent folder, they are all .gz files..
there is folder1\folder2\*.gz
and there are about 50 folders... (1 Reply)
Discussion started by: xytiz
1 Replies
7. Programming
Hi all,
I am a newbie to unix programming using C..
So i would like to have a few simple C programs to start off with..
I wanted programs on learning ,
abort,kill and raise,alarm and pause,I would also like to know how to use the vfork() in a prg
It would be really great if i can have... (1 Reply)
Discussion started by: wrapster
1 Replies
8. UNIX for Dummies Questions & Answers
OK, so I'm trying to finish my last individual assignment for this course, and it's the first time I've visited a forum (I've actually understood UNIX up to this point). I am having trouble with this one. I have to write a program that prompts the user to type their first name and stores it in a... (3 Replies)
Discussion started by: metalgoddess21
3 Replies
9. Linux
:)
Hi,
I intend to learn kernel programming.
Please, let me know if have know any good books for learning or any sites which will be help me.
Thanks in advance.
-
masg (1 Reply)
Discussion started by: masg1
1 Replies
10. Programming
Hi Everyone, I really hope I could get some insight from a few of you, I've been searching the net for various resources, and this board seems to be the friendliest and most helpful by far.
I work for a medical research company and we use sun 4
and we have different studies that have their... (1 Reply)
Discussion started by: milenky
1 Replies
id32_alloc(9F) Kernel Functions for Drivers id32_alloc(9F)
NAME
id32_alloc, id32_free, id32_lookup - 32-bit driver ID management routines
SYNOPSIS
#include <sys/ddi.h>
#include <sys/id32.h>
uint32_t id32_alloc(void *ptr, int flag);
void id32_free(uint32_t token);
void *id32_lookup(uint32_t token);
INTERFACE LEVEL
Solaris architecture specific (Solaris DDI).
PARAMETERS
ptr any valid 32- or 64-bit pointer
flag determines whether caller can sleep for memory (see kmem_alloc(9F) for a description)
DESCRIPTION
These routines were originally developed so that device drivers could manage 64-bit pointers on devices that save space only for 32-bit
pointers.
Many device drivers need to pass a 32-bit value to the hardware when attempting I/O. Later, when that I/O completes, the only way the
driver has to identify the request that generated that I/O is via a "token". When the I/O is initiated, the driver passes this token to the
hardware. When the I/O completes the hardware passes back this 32-bit token.
Before Solaris supported 64-bit pointers, device drivers just passed a raw 32-bit pointer to the hardware. When pointers grew to be 64 bits
this was no longer possible. The id32_*() routines were created to help drivers translate between 64-bit pointers and a 32-bit token.
Given a 32- or 64-bit pointer, the routine id32_alloc() allocates a 32-bit token, returning 0 if KM_NOSLEEP was specified and memory could
not be allocated. The allocated token is passed back to id32_lookup() to obtain the original 32- or 64-bit pointer.
The routine id32_free() is used to free an allocated token. Once id32_free() is called, the supplied token is no longer valid.
Note that these routines have some degree of error checking. This is done so that an invalid token passed to id32_lookup() will not be
accepted as valid. When id32_lookup() detects an invalid token it returns NULL. Calling routines should check for this return value so that
they do not try to dereference a NULL pointer.
CONTEXT
These functions can be called from user or interrupt context. The routine id32_alloc() should not be called from interrupt context when the
KM_SLEEP flag is passed in. All other routines can be called from interrupt or kernel context.
SEE ALSO
kmem_alloc(9F)
Writing Device Drivers
SunOS 5.10 12 Dec 2001 id32_alloc(9F)
