Apologies for writing to you again. But, my purpose of this code is to write 'Alux' to RAM, then read it back again.
Done.
Quote:
...In the kernel.
What for? Putting 'Alux' in some random spot of kernel memory would crash the machine.
Quote:
I used to do similar things on the Commodore 64. There was a 'poke' command.
The commodore 64 had no memory management, few to no sensible programming languages, and no kernel, just a BIOS. You could get away with poke-ing random things, and frequently had to to get around language and BIOS limitations.
Linux has proper memory management, which makes poke kind of pointless. It also has a kernel, which gives you much, much better ways to do what you want than poke. Nobody has to poke anymore, there's no point.
Modern I/O is a lot more complicated than that, anyway. There's not a lot to be accomplished by poking random addresses.
Last edited by Corona688; 12-21-2011 at 03:49 PM..
Has anyone had any experience with this new processor and its compatability with Linux/Unix? How did it preform comared to regular Athlons and P4's?
I also have one other question. I plan on buying a new dell and fiddling left and right with it. Which type of RAM is better, RDRAM or... (3 Replies)
I wish to install Red Hat linux 7.1 on a machine with 16mb of EDO Ram. When I enter the instalation process I am told 'You do not have enough memory'. Is there a way to install RHL with only the 16? Or will I have to upgrade and buy some very expensive EDO.
~ Paul (3 Replies)
Hello all
i own p100 16ram laptop , i would like to run linux on it
i need it for gcc compilation and shell scripting , no gui.
what version of linux should i install , i dont mind to install old one .
tnx allot (5 Replies)
I don't know a lot of the world of Linux, but i want to start with an old machine; did someone knows if i can install Linux in a computer with a processor Pentium (not celeron) @ 133 Mhz, 98Mb in RAM (PC100) and 3Gb Hard Drive?
a friend tell me about Ubuntu and openSUSE, but I don't know if... (5 Replies)
Hi Gurus,
Can someone let me know how to find the RAM size,ROM size and Number of processors for a linux server.
Version :Linux 2.4.9-e.57smp
Also what does "e.57smp" stands for?
Thanks in advance gurus.....
cheers. (3 Replies)
Hi
I am very new to Linux, but very keen to learn it.
I am having a desktop of 300 MHz with 128 MB RAM and 30 GB hard drive with Windows XP.
My first question is - Is there any version/flavour of Linux available that can be installed on above system especially Fedora with less compromise... (6 Replies)
How to enable more than 4GB RAM support on Linux 32bit OS?
OS: CentOS release 5.4 (Final)
Kernel version: 2.6.18-53.el5
Arch: 32Bit
I got solution at Innovationframes.com • View topic - How to enable more than 4GB RAM support on Linux 32bit OS? but my question is the steps given... (5 Replies)
Discussion started by: chandranjoy
5 Replies
LEARN ABOUT LINUX
setstate_r
RANDOM_R(3) Linux Programmer's Manual RANDOM_R(3)NAME
random_r, srandom_r, initstate_r, setstate_r - reentrant random number generator
SYNOPSIS
#include <stdlib.h>
int random_r(struct random_data *buf, int32_t *result);
int srandom_r(unsigned int seed, struct random_data *buf);
int initstate_r(unsigned int seed, char *statebuf,
size_t statelen, struct random_data *buf);
int setstate_r(char *statebuf, struct random_data *buf);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
random_r(), srandom_r(), initstate_r(), setstate_r():
_SVID_SOURCE || _BSD_SOURCE
DESCRIPTION
These functions are the reentrant equivalents of the functions described in random(3). They are suitable for use in multithreaded programs
where each thread needs to obtain an independent, reproducible sequence of random numbers.
The random_r() function is like random(3), except that instead of using state information maintained in a global variable, it uses the
state information in the argument pointed to by buf. The generated random number is returned in the argument result.
The srandom_r() function is like srandom(3), except that it initializes the seed for the random number generator whose state is maintained
in the object pointed to by buf, instead of the seed associated with the global state variable.
The initstate_r() function is like initstate(3) except that it initializes the state in the object pointed to by buf, rather than initial-
izing the global state variable.
The setstate_r() function is like setstate(3) except that it modifies the state in the object pointer to by buf, rather than modifying the
global state variable.
RETURN VALUE
All of these functions return 0 on success, or -1 on error.
ERRORS
EINVAL A state array of less than 8 bytes was specified to initstate_r().
EINVAL The statebuf or buf argument to setstate_r() was NULL.
EINVAL The buf or result argument to random_r() was NULL.
CONFORMING TO
These functions are nonstandard glibc extensions.
SEE ALSO drand48(3), rand(3), random(3)COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2008-03-07 RANDOM_R(3)