Debian Programming :: C++ Function Call For Manual SSD-TRIM Commands
Jul 25, 2015
I'm looking for a way to launch "TRIM" commands to a SSD drive myself, from a c++ code I'm going to write, for flash erasing an SSD drive (and not to wait for others things that "should do it automatically in some circumstances if this or this, this and this have been enabled and [..]" but will never tell me if it worked or not
I know there is thousands of complicated ways to test and check if it worked, and also software that needs money to do so, that's why I just want to call myself the TRIM functions and read the return value (like true or false) in order to know if it worked !
Where I can find the c++ call that could permit me to do so ? I heard about the GLibC that gives a way to access every user space function related to Linux Kernel (poll, select and others) as standard c++ functions, I suppose that, if there is a way, it will be on the GLibC but how to find it ?
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Apr 18, 2011
I am trying a scenario for calling a shell script when ever a trigger is called. Can some one guide me how to achieve this scenario. Also it should passes the value from the table to the shell script. Can some one explain me along with the example.
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Mar 15, 2011
I got two cgi shell scripting files. Is it possible when i am in file 1, to call a function from file 2?
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Jan 5, 2010
The following is the UDP client code I am using.
Code:
Even the server is down, sendto function is not returning -1.
Instead, it is returning the length of the message as if it is success.
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Nov 5, 2010
Am getting errors about "mysql_connect()" for the following code:
Have compiled PHP with MySQL support using the following:
Thought PHP 5.3 has a built-in replacement called mysqlnd, and there's no need to install "php-mysql" RPM.
However, according to the following site this is still required: [url]
Give me an idea whether I really have to install php-mysql RPM in order to use mysql_connect() for PHP?
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Dec 28, 2010
If i have a python file with a function call_me(a,b),how can I call this function from the command line ,after i compile the program?
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Jul 2, 2011
I am writing a function(in C language in Linux) to initialize an array of a structure from a mysql table by calling a function by reference but I have a problem with call this function by reference . this is my program:PHP Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
[code]...
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Jan 1, 2010
We're planning to install CentOS on a new server that will be based on two Solid-State Disks in a RAID1 configuration. The RAID management will be handled by a hardware Adaptec controller. I've learnt that the TRIM function for SSD drives is supported starting from kernel 2.6.28.
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Jul 31, 2010
I am trying to connect to my mysql database using php but I am getting the error "Fatal error: Call to undefined function mysql_connect()".
I checked phpinfo() and there is no reference to MySQL. I believe this means that my install of PHP doesn't support MySQL. Do I need to uninstall and reinstall with a version of PHP with MySQL support? If so how should I do this and how do I get a version of PHP that supports MySQL?
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Apr 6, 2011
how to call a c function or to execute a c pgm o/p from php file and this output should be displayed in the html page ? I have tried with system() and exec()but its not working.
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Sep 6, 2010
How can it be determined whether a function defined in some file of an application source-code(meant for multiple operating systems e.g., Linux, AmigaOS) is actually called when the application run on Linux?
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Apr 13, 2010
As per my knowledge, one can use systemcall to call the driver functions for example using open, close... Now is there any way to call driver functions directly from application without using system call?
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May 7, 2010
I had created a database in mysql called guestbook and created tables also in mysql and also granted remote connections privileges from below command
mysql> grant all privileges on *.* to root@192.168.1.222 identified by "rrcrrc";
i had accessed from my pc(192.168.1.222) and used phprunner to create php web pages and copied the phprunner output folder to use with apache. when i accessed from my pc the below error is coming
Fatal error: Call to undefined function: mysql_connect() in /home/administrator/useridall/include/dbconnection.php on line 9
i can't understand what is going on so i put this question in the forum, below is i am giving the dbconnection.php details.
dbconection.php
<?php
function db_connect()
{
[code]....
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Oct 12, 2010
I want to populate an array of string by files exists in directory on mounting of file system. I got an entry point for file system mount. I can use either do_mount function or fill_superblock function. But I am not clear about how to call readdir from there itself. I need inputs for calling readdir from fill_superblock function.
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Jun 14, 2011
I know that you already had some cases of this error on this forum, and i wouldn't like to open up old topics, but none of the solutions mentioned before, helped.
I am trying to run a local php script on a Debian based server, but every time i run it, i get this error message:
Code:
Code:
And the php mysql_connect() function works as tested in this .php file
Code:
Using the script
Code:
The php script i am trying to run is a php irc bot from
Code:
And the mysql.php file which issues the error is like this:
Code:
I have also tried editing the mysql_connect function to be something like the test script i mentioned above, but still get the same error.
I have installed LAMP server using the apt-get (installed following packages: apache2 php5 libapache2-mod-php5 mysql-server mysql-client php5-mysql phpmyadmin) everything so far works great.
What i have noticed, that even though mysql shows up in phpinfo, it doesn't show up as a module listed in 'php -m'
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May 17, 2011
I am having a problem with my slackware version 12 server. I tried installing a new joomla theme from the rockettheme and its giving me the following error while loading the site.
Fatal error: Call to undefined function imagecreatefromjpeg()in /home/www/verticaltest/modules/mod_rokstories/thumbnail.inc.php on line 167
Thought it was a problem with gd library modules, but in info.php, its showing that gd is installed in the server. Pasting the result form info.php below..
If gd is installed, what should be the problem?
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Sep 16, 2010
I'm newbie with Centos. I have got a server with Centos 5.2 and I need to use PHP 5 >= 5.1.0 function as timezone_open. So that, I follow this guide to update php. Now, I have got PHP 5.1.6 (cli) (built: Mar 31 2010 02:44:37). I create a simple test.php: Quote:<?php $var = timezone_open('UTC');print_r($var);?>
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Aug 4, 2011
I have weird problem with postgresql + nginx + php5 0 ubuntu 11.04. Postgresql works just fine, when I run "php test.php" from shell. I assume php runs from shell are called cgi runs? When I open page from browser [URL]... I get following error. I assume php runs from browser are called cgi runs? Fatal error: Call to undefined function pg_connect() in /var/www/mydomain/htdocs/test.php on line 7 When you print php info, only reference to postgresql is pgsql.ini and pdo_pgsql.ini files that are parsed.
[code]....
I did install postgresql by running following commands:
sudo -s
aptitude install postgresql
aptitude install php5-pgsql
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Nov 22, 2009
curl: try 'curl --help' or 'curl --manual' for more information so here curl is working when I'm trying php test.php I got: PHP Fatal error: Call to undefined function: curl_init() in /root/test.php on line 142
Also in php.ini is missing extension=php_curl.dll but I added and the same problem
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Nov 16, 2010
Code:
#include <iostream>
using namespace std;
[code]...
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May 18, 2010
I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.
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Apr 30, 2015
When I try to compile this code:
#include <math.h>
int main (void) {
double x, y;
x = 2;
y = sqrt(x);
return 0;
}
With the command:
$ gcc test.c
I got this message:
/tmp/cc5QZmCN.o: In function 'main':
test.c:(.text+0x16): undefined reference to 'sqrt'
collect2: error: ld returned 1 exit status
I tried this on a fresh jessie install. I have the same problem on wheezy.
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Aug 29, 2015
I just bought a Samsung 850 Pro 250GB SSD drive and have since then found out that Linux has/had a faulty implementation of queued trim (which is a synonym for NCQ I think). I'm using kernel 4.1.0 (the default selected by the Debian 8.1 installer) and I've read that Samsung drives are blacklisted for queued trim by the recent kernels. However, the output of dmesg contains the following lines, with and without TRIM enabled for the drive (i.e. with or without the "discard" option in fstab for the drive):
Code: Select all[Â Â 1.012287] ata6.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[Â Â 1.013438] ata5.00: failed to get NCQ Send/Recv Log Emask 0x1
[Â Â 1.013440] ata5.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[Â Â 1.015037] ata5.00: failed to get NCQ Send/Recv Log Emask 0x1
Since the depth is not 1 but rather 31, it looks like NCQ is enabled. I've disabled TRIM on the drive for now, and whether it's safe to enable TRIM or not.
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Apr 17, 2010
does Debian Lenny 5.0.4 stable supports SSD TRIM? If not, what package i need to add if i buy a new SSD and dont want to loose Hard Disk Performance over time?
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Mar 22, 2011
I am getting this error when I try to connect to my MySQL database from a PHP page. "Fatal error: Call to undefined function mysql_connect() in /usr/local/htdocs/test.php on line 11" I have found instances on the Internet where other people had the same problem but from everything I've read, none of it appears to do anything for me.
I have read that I need the "extension=mysql.so" in my php.ini file and to uncomment it but it's not in there and I don't even have the "mysql.so" file. Many people have said to install the MySQL "devel" package, which I have also done and it is still not adding the file. I have also tried running the PHP ./configure again with the "--with-mysql". After all of these I still can't seem to get any further than I was when I found out I had a problem.
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Jun 9, 2010
I am trying to connect PHP with Mysql, but coming across the below error: PHP Fatal error: Call to undefined function mysql_connect() in /var/www/html/index.php on line 2
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May 24, 2010
I want to declare a function in a function, but had no success till now, see the error code below and visit the project at sourceforge
[Code]...
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Jun 20, 2010
I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.
#!/bin/bash
addelementtoarray()
{
local arrayname=$1
[code]....
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Sep 16, 2010
fit a surface i.e. W(x,y) using svdfit() provided by "Numerical Recipes in C". svdfit() is written for curve fitting and not for surface fitting.But one can use svdfit(), as claimed by authors of NR book, to do surface fitting. On page 680 of NR book, authors have given a hint on how to use svdfit() for fitting a surface. But I have not understood it.This link may be helpful (Chapter 15 th is relevant here.):[URL]This is my problem:
Code:
I have a set of 100 numbers. I want to fit a 2-Dimensional function W(x,y) to these numbers.
[code]....
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Feb 23, 2009
I was wondering if there was a way to add a switch to a gcc/g++ call everytime. I have a few libraries that I need to compile for different processors. Each has a makefile which calls gcc to compile. Here is the best option I could come up with so far:Include a Makefile and define CC as gcc -mcpu=xxx.
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