define syntax - Page 112

Purpose of "computer" section in MySQL Cluster 7.2?

- by dpk

According to the cluster documentation, you can either define data nodes with: [ndbd] NodeId=n HostName=1.2.3.4 or [ndbd] NodeId=n ExecuteOnComputer=m [computer] Id=m HostName=1.2.3.4 I don't see a substantial difference between the two. The documentation has this to say: The [computer] section has no real significance other than serving as a way to avoid the need of defining host names for each node in the system. I'm stumped. If I have to define a hostname, what benefit is there to defining it in [computer] instead of [ndbd]?

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Sendmail relay authentication

- by Pawel Veselov

I'm trying to set up my sendmail to authenticate against a relay (comcast). I'm not seeing any attempts to authenticate at all. I'm trying to just debug how authentication works, and can't connect all the pieces... I have, in my .mc file: define(`RELAY_MAILER_ARGS', `TCP $h 587')dnl define(`SMART_HOST', `relay:smtp.comcast.net.')dnl define(`confAUTH_MECHANISMS', `PLAIN')dnl FEATURE(`authinfo',`hash /etc/mail/client-info')dnl And in my /etc/mail/client-info: AuthInfo:*.comcast.net "U:root" "I:comcast_user" "P:comcast_password" Now, I know everything is fine with the u/p, as I could authenticate directly through SMTP, using telnet. There are two things I don't understand. When AuthInfo records are searched for, they are matched by the target hostname. How? Does it it use the map key (something I would expect), or uses the so-called "Domain" ("R:" parameter that I don't set in my auth-info line) What is "U:", really? Sendmail README (http://www.sendmail.org/m4/smtp_auth.html) says it's "user(authoraztion id)", and "I:" is "authentication ID". That suggests that my username should be in "U:", actually, but http://www.sendmail.org/~ca/email/auth.html says that "I:" is your remote user name. The session looks like this: [root@manticore]/etc/mail# sendmail -qf -v Warning: Option: AuthMechanisms requires SASL support (-DSASL) Running /var/spool/mqueue/p97CgcWq023273 (sequence 1 of 399) [email protected]... Connecting to smtp.comcast.net. port 587 via relay... 220 omta19.westchester.pa.mail.comcast.net comcast ESMTP server ready >>> EHLO my.host.name 250-omta19.westchester.pa.mail.comcast.net hello [my.ip.add.res], pleased to meet you 250-HELP 250-AUTH LOGIN PLAIN 250-SIZE 15728640 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-STARTTLS 250 OK >>> STARTTLS 220 2.0.0 Ready to start TLS >>> EHLO my.host.name 250-omta19.westchester.pa.mail.comcast.net hello [my.ip.add.res], pleased to meet you 250-HELP 250-AUTH LOGIN PLAIN 250-SIZE 15728640 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 OK >>> MAIL From:<> SIZE=2183 550 5.1.0 Authentication required MAILER-DAEMON... aliased to postmaster postmaster... aliased to root root... aliased to [email protected] postmaster... aliased to root root... aliased to [email protected] >>> RSET 250 2.0.0 OK [root@manticore]/etc/mail# sendmail -d0.1 Version 8.14.3 Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7 NAMED_BIND NETINET NETINET6 NETUNIX NEWDB NIS PIPELINING SCANF SOCKETMAP STARTTLS TCPWRAPPERS USERDB XDEBUG Thanks, Pawel.

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Windows 2008 R2 File Sharing - 'Access denied' if groups are specified in ACL

- by John Smith

I am trying to move our old Windows 2003 File Server to Windows 2008 R2. What I have noticed, however, is that the entries for groups in the ACL are being ignored. For example, a user is part of a group in active directory. If I create a folder and enable full access for this group, then share this folder (and define sharing permissions for this group), users in that group do not get access to that folder. If I make an entry in the ACL for the user itself, it works perfectly. These even applies to my domain administrator account - If I create a folder and give full control to the local administrators group / domain administrators group, and I physically log on to the server, I still do not get access - I need to explicitly define my name to proceed. I am not sure what the problem is, tried looking it up in Google to no avail Any assistance will be greatly appreciated

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Nagios3: Conditional operators for service checks?

- by Dave

I'm trying to setup Nagios to monitor my various using hostgroups to define 'machine roles', against which I run services to check the machines by role. However, I'd like to use conditional operators that would enable me to run the service check against an intersection of two host groups, rather than their unions... i.e. using &&, ||, or () operators. For example, imagine I have the following servers: www-eu: Linux WWW (Apache) server, in the EU www-us: Windows WWW (IIS) server, in the US (West coast) ftp-eu: Linux FTP server, in the EU ftp-us: Windows FTP server, in the US I would want to create the following host groups: US-Servers: www-us, ftp-us EU-Servers: www-eu, ftp-eu WWW-Servers: www-us, www-eu FTP-Servers: ftp-us, ftp-eu Now say I'm interested in checking the HTTP response time for my web servers. Then let's say this particular Nagios service is running from the US (West Coast), and that I have a command called *check_http_response_time*. This command will check the responsiveness of the HTTP server, which I can provide an argument which defines the max response time before raising critical. My command might look like: check_http_response_time $HOSTNAME$ 50 Now traditionally, I can run my checks by specifying a list of host or hostgroups. define service{ use local-service hostgroup_name WWW-Servers # Servers = www-us, www-eu servicegroups WWW Checks service_description Check HTTP Response Time check_command check_http_response_time!50 } However, with the above service definition, given my Nagios service is in US West, I could reasonably expect that my EU server will return critical. Really, I want different thresholds for each region (50 for US West, 200 for EU.) I would have to permutate my service for each host and set their custom threshold, or alternatively permutate out my service groups by role & region (i.e. WWW-Servers-EU), and run my specific thresholds against those. Though the latter is better, both are much messier than I'd like... What I would love, and what this post is asking for, is a way to use hostgroups to perform an intersection using conditional logic, rather than a simple union. It might look like: define service{ use local-service hostgroup_name WWW-Servers && US-Servers servicegroups WWW Checks service_description Check HTTP Response Time check_command check_http_response_time!50 } It then would run the check only against servers that are in both WWW-Servers and US-Servers, in my example, just www-us. The benefits of such a feature would be significant for Nagios services configured for large-scale. Is this feature available? If it isn't, will it be available in the future? Is there an alternative way to accomplish this given the most recent Nagios version? Any tips/suggestions are most appreciated! Dave

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Nagios - NagWin - Send notification with gmail

- by Attila Bujáki

I would like to send Nagios notifications using my gmail account. I have already set up my hosts I want to monitor and services also. What is the most simple way to accomplish this using NagWin on a Windows Server 2012 installation? As far as I know I must change some of these configuration settings: # 'notify-host-by-email' command definition define command{ command_name notify-host-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/blat - -to $CONTACTEMAIL$ -f nagios@localhost -subject "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" -server ??? } # 'notify-service-by-email' command definition define command{ command_name notify-service-by-email command_line /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n" | /bin/blat - -to $CONTACTEMAIL$ -f nagios@localhost -subject "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" -server ??? } What should I use for smtp server? Is it possible to directly send my notifications to the Gmail server?

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Can't get simple Apache VHost up and running

- by TK Kocheran

Unfortunately, I can't seem to get a simple Apache VHost online. I used to simply have one VHost which bound to all: <VirtualHost *:80>, but this isn't appropriate for security anymore. I need to have one VHost for localhost requests (ie my dev server) and one for incoming requests via my domain name. Here's my new VHost: NameVirtualHost domain1.com <VirtualHost domain1.com:80> DocumentRoot /var/www ServerName domain1.com </VirtualHost> <VirtualHost domain2.com:80> DocumentRoot /var/www ServerName domain2.com </VirtualHost> After I restart my server, I see the following errors in my log: [Wed Feb 16 11:26:36 2011] [error] [client ####.###.###.###] File does not exist: /htdocs [Wed Feb 16 11:26:36 2011] [error] [client ####.###.###.###] File does not exist: /htdocs What am I doing wrong? EDIT As per the answer give below, I have modified my configuration. Here are my configuration files: /etc/apache2/ports.conf: Listen 80 <IfModule mod_ssl.c> # If you add NameVirtualHost *:443 here, you will also have to change # the VirtualHost statement in /etc/apache2/sites-available/default-ssl # to <VirtualHost *:443> # Server Name Indication for SSL named virtual hosts is currently not # supported by MSIE on Windows XP. Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> Here are my actual defined sites: /etc/apache2/sites-enabled/000-localhost: NameVirtualHost 127.0.0.1:80 <VirtualHost 127.0.0.1:80> ServerAdmin ######### DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> RewriteEngine On RewriteLog "/var/log/apache2/mod_rewrite.log" RewriteLogLevel 9 <Location /> <Limit GET POST PUT> order allow,deny allow from all deny from 65.34.248.110 deny from 69.122.239.3 deny from 58.218.199.147 deny from 65.34.248.110 </Limit> </Location> </VirtualHost> /etc/apache2/sites-enabled/001-rfkrocktk.dyndns.org: NameVirtualHost rfkrocktk.dyndns.org:80 <VirtualHost rfkrocktk.dyndns.org:80> DocumentRoot /var/www ServerName rfkrocktk.dyndns.org </VirtualHost> And, just for kicks, my main file: /etc/apache2/apache2.conf: # # Based upon the NCSA server configuration files originally by Rob McCool. # # This is the main Apache server configuration file. It contains the # configuration directives that give the server its instructions. # See http://httpd.apache.org/docs/2.2/ for detailed information about # the directives. # # Do NOT simply read the instructions in here without understanding # what they do. They're here only as hints or reminders. If you are unsure # consult the online docs. You have been warned. # # The configuration directives are grouped into three basic sections: # 1. Directives that control the operation of the Apache server process as a # whole (the 'global environment'). # 2. Directives that define the parameters of the 'main' or 'default' server, # which responds to requests that aren't handled by a virtual host. # These directives also provide default values for the settings # of all virtual hosts. # 3. Settings for virtual hosts, which allow Web requests to be sent to # different IP addresses or hostnames and have them handled by the # same Apache server process. # # Configuration and logfile names: If the filenames you specify for many # of the server's control files begin with "/" (or "drive:/" for Win32), the # server will use that explicit path. If the filenames do *not* begin # with "/", the value of ServerRoot is prepended -- so "/var/log/apache2/foo.log" # with ServerRoot set to "" will be interpreted by the # server as "//var/log/apache2/foo.log". # ### Section 1: Global Environment # # The directives in this section affect the overall operation of Apache, # such as the number of concurrent requests it can handle or where it # can find its configuration files. # # # ServerRoot: The top of the directory tree under which the server's # configuration, error, and log files are kept. # # NOTE! If you intend to place this on an NFS (or otherwise network) # mounted filesystem then please read the LockFile documentation (available # at <URL:http://httpd.apache.org/docs-2.1/mod/mpm_common.html#lockfile>); # you will save yourself a lot of trouble. # # Do NOT add a slash at the end of the directory path. # ServerRoot "/etc/apache2" # # The accept serialization lock file MUST BE STORED ON A LOCAL DISK. # #<IfModule !mpm_winnt.c> #<IfModule !mpm_netware.c> LockFile /var/lock/apache2/accept.lock #</IfModule> #</IfModule> # # PidFile: The file in which the server should record its process # identification number when it starts. # This needs to be set in /etc/apache2/envvars # PidFile ${APACHE_PID_FILE} # # Timeout: The number of seconds before receives and sends time out. # Timeout 300 # # KeepAlive: Whether or not to allow persistent connections (more than # one request per connection). Set to "Off" to deactivate. # KeepAlive On # # MaxKeepAliveRequests: The maximum number of requests to allow # during a persistent connection. Set to 0 to allow an unlimited amount. # We recommend you leave this number high, for maximum performance. # MaxKeepAliveRequests 100 # # KeepAliveTimeout: Number of seconds to wait for the next request from the # same client on the same connection. # KeepAliveTimeout 15 ## ## Server-Pool Size Regulation (MPM specific) ## # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # event MPM # StartServers: initial number of server processes to start # MaxClients: maximum number of simultaneous client connections # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> # These need to be set in /etc/apache2/envvars User ${APACHE_RUN_USER} Group ${APACHE_RUN_GROUP} # # AccessFileName: The name of the file to look for in each directory # for additional configuration directives. See also the AllowOverride # directive. # AccessFileName .htaccess # # The following lines prevent .htaccess and .htpasswd files from being # viewed by Web clients. # <Files ~ "^\.ht"> Order allow,deny Deny from all Satisfy all </Files> # # DefaultType is the default MIME type the server will use for a document # if it cannot otherwise determine one, such as from filename extensions. # If your server contains mostly text or HTML documents, "text/plain" is # a good value. If most of your content is binary, such as applications # or images, you may want to use "application/octet-stream" instead to # keep browsers from trying to display binary files as though they are # text. # DefaultType text/plain # # HostnameLookups: Log the names of clients or just their IP addresses # e.g., www.apache.org (on) or 204.62.129.132 (off). # The default is off because it'd be overall better for the net if people # had to knowingly turn this feature on, since enabling it means that # each client request will result in AT LEAST one lookup request to the # nameserver. # HostnameLookups Off # ErrorLog: The location of the error log file. # If you do not specify an ErrorLog directive within a <VirtualHost> # container, error messages relating to that virtual host will be # logged here. If you *do* define an error logfile for a <VirtualHost> # container, that host's errors will be logged there and not here. # ErrorLog /var/log/apache2/error.log # # LogLevel: Control the number of messages logged to the error_log. # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. # LogLevel warn # Include module configuration: Include /etc/apache2/mods-enabled/*.load Include /etc/apache2/mods-enabled/*.conf # Include all the user configurations: Include /etc/apache2/httpd.conf # Include ports listing Include /etc/apache2/ports.conf # # The following directives define some format nicknames for use with # a CustomLog directive (see below). # If you are behind a reverse proxy, you might want to change %h into %{X-Forwarded-For}i # LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %O" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent # # Define an access log for VirtualHosts that don't define their own logfile CustomLog /var/log/apache2/other_vhosts_access.log vhost_combined # Include of directories ignores editors' and dpkg's backup files, # see README.Debian for details. # Include generic snippets of statements Include /etc/apache2/conf.d/ # Include the virtual host configurations: Include /etc/apache2/sites-enabled/ what else do I need to do to fix it? Should I be telling apache to listen on 127.0.0.1:80, or isn't it already listening there?

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how to solve unhandled exception error when using visual C++ 2008?

- by make

Hi, Could someone please help me to solve unhandled exception error when using visual C++ 2008? the error is displayed as follow: Unhandled exception at 0x00411690 in time.exe: 0xC0000005: Access violation reading location 0x00000008 Actually when I used visual c++ 6 in the past, there weren't any error and the program was running fine. But now ehen I use visual 2008, I am getting this Unhandled exception error. Here is the program: #include <stdio.h> #include <stdlib.h> #include <time.h> #ifdef _WIN32 // #include <winsock.h> #include <windows.h> #include "stdint.h" // typedef __int64 int64_t // Define it from MSVC's internal type // typedef unsigned __int32 uint32_t #else #include <stdint.h> // Use the C99 official header #include <sys/time.h> #include <unistd.h> #endif #if defined(_MSC_VER) || defined(_MSC_EXTENSIONS) #define DELTA_EPOCH_IN_MICROSECS 11644473600000000Ui64 #else #define DELTA_EPOCH_IN_MICROSECS 11644473600000000ULL #endif struct timezone { int tz_minuteswest; /* minutes W of Greenwich */ int tz_dsttime; /* type of dst correction */ }; #define TEST #ifdef TEST uint32_t stampstart(); uint32_t stampstop(uint32_t start); int main() { uint32_t start, stop; start = stampstart(); /* Your code goes here */ stop = stampstop(start); return 0; } #endif int gettimeofday(struct timeval *tv, struct timezone *tz) { FILETIME ft; unsigned __int64 tmpres = 0; static int tzflag = 0; if (NULL != tv) { GetSystemTimeAsFileTime(&ft); tmpres |= ft.dwHighDateTime; tmpres <<= 32; tmpres |= ft.dwLowDateTime; tmpres /= 10; /*convert into microseconds*/ /*converting file time to unix epoch*/ tmpres -= DELTA_EPOCH_IN_MICROSECS; tv->tv_sec = (long)(tmpres / 1000000UL); tv->tv_usec = (long)(tmpres % 1000000UL); } if (NULL != tz) { if (!tzflag) { _tzset(); tzflag++; } tz->tz_minuteswest = _timezone / 60; tz->tz_dsttime = _daylight; } return 0; } uint32_t stampstart() { struct timeval tv; struct timezone tz; struct tm *tm; uint32_t start; gettimeofday(&tv, &tz); tm = localtime(&tv.tv_sec); printf("TIMESTAMP-START\t %d:%02d:%02d:%d (~%d ms)\n", tm->tm_hour, tm->tm_min, tm->tm_sec, tv.tv_usec, tm->tm_hour * 3600 * 1000 + tm->tm_min * 60 * 1000 + tm->tm_sec * 1000 + tv.tv_usec / 1000); start = tm->tm_hour * 3600 * 1000 + tm->tm_min * 60 * 1000 + tm->tm_sec * 1000 + tv.tv_usec / 1000; return (start); } uint32_t stampstop(uint32_t start) { struct timeval tv; struct timezone tz; struct tm *tm; uint32_t stop; gettimeofday(&tv, &tz); tm = localtime(&tv.tv_sec); stop = tm->tm_hour * 3600 * 1000 + tm->tm_min * 60 * 1000 + tm->tm_sec * 1000 + tv.tv_usec / 1000; printf("TIMESTAMP-END\t %d:%02d:%02d:%d (~%d ms) \n", tm->tm_hour, tm->tm_min, tm->tm_sec, tv.tv_usec, tm->tm_hour * 3600 * 1000 + tm->tm_min * 60 * 1000 + tm->tm_sec * 1000 + tv.tv_usec / 1000); printf("ELAPSED\t %d ms\n", stop - start); return (stop); } thanks for your replies:

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Enabling ppolicy in openldap

- by nitins

For enabling ppolicy is in Openldap I am trying to import the policy given below. dn: ou=policies,dc=example,dc=in ou: policies objectClass: top objectClass: organizationalUnit # default, policies, example.in dn: cn=default,ou=policies,dc=example,dc=in objectClass: top objectClass: device objectClass: pwdPolicy cn: default pwdAttribute: userPassword pwdMaxAge: 7776002 pwdExpireWarning: 432000 pwdInHistory: 0 pwdCheckQuality: 1 pwdMinLength: 8 pwdMaxFailure: 5 pwdLockout: TRUE pwdLockoutDuration: 900 pwdGraceAuthNLimit: 0 pwdFailureCountInterval: 0 pwdMustChange: TRUE pwdAllowUserChange: TRUE pwdSafeModify: FALSE But I am getting the error given below. ldapadd -x -D "cn=Manager,dc=example,dc=in" -w xxxxxx -f /tmp/new-policy.ldif adding new entry "cn=default,ou=policies,dc=example,dc=in" ldapadd: Invalid syntax (21) additional info: pwdAttribute: value #0 invalid per syntax Any idea on why I am getting the error ? I have already added the ppolicy schema and module in slapd.conf

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How to: Unlimited Bash/shell history ?

- by Dragos

Is there a way to define an unlimited history in Bash ?

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Issue with SPI (Serial Port Comm), stuck on ioctl()

- by stef

I'm trying to access a SPI sensor using the SPIDEV driver but my code gets stuck on IOCTL. I'm running embedded Linux on the SAM9X5EK (mounting AT91SAM9G25). The device is connected to SPI0. I enabled CONFIG_SPI_SPIDEV and CONFIG_SPI_ATMEL in menuconfig and added the proper code to the BSP file: static struct spi_board_info spidev_board_info[] { { .modalias = "spidev", .max_speed_hz = 1000000, .bus_num = 0, .chips_select = 0, .mode = SPI_MODE_3, }, ... }; spi_register_board_info(spidev_board_info, ARRAY_SIZE(spidev_board_info)); 1MHz is the maximum accepted by the sensor, I tried 500kHz but I get an error during Linux boot (too slow apparently). .bus_num and .chips_select should correct (I also tried all other combinations). SPI_MODE_3 I checked the datasheet for it. I get no error while booting and devices appear correctly as /dev/spidevX.X. I manage to open the file and obtain a valid file descriptor. I'm now trying to access the device with the following code (inspired by examples I found online). #define MY_SPIDEV_DELAY_USECS 100 // #define MY_SPIDEV_SPEED_HZ 1000000 #define MY_SPIDEV_BITS_PER_WORD 8 int spidevReadRegister(int fd, unsigned int num_out_bytes, unsigned char *out_buffer, unsigned int num_in_bytes, unsigned char *in_buffer) { struct spi_ioc_transfer mesg[2] = { {0}, }; uint8_t num_tr = 0; int ret; // Write data mesg[0].tx_buf = (unsigned long)out_buffer; mesg[0].rx_buf = (unsigned long)NULL; mesg[0].len = num_out_bytes; // mesg[0].delay_usecs = MY_SPIDEV_DELAY_USECS, // mesg[0].speed_hz = MY_SPIDEV_SPEED_HZ; mesg[0].bits_per_word = MY_SPIDEV_BITS_PER_WORD; mesg[0].cs_change = 0; num_tr++; // Read data mesg[1].tx_buf = (unsigned long)NULL; mesg[1].rx_buf = (unsigned long)in_buffer; mesg[1].len = num_in_bytes; // mesg[1].delay_usecs = MY_SPIDEV_DELAY_USECS, // mesg[1].speed_hz = MY_SPIDEV_SPEED_HZ; mesg[1].bits_per_word = MY_SPIDEV_BITS_PER_WORD; mesg[1].cs_change = 1; num_tr++; // Do the actual transmission if(num_tr > 0) { ret = ioctl(fd, SPI_IOC_MESSAGE(num_tr), mesg); if(ret == -1) { printf("Error: %d\n", errno); return -1; } } return 0; } Then I'm using this function: #define OPTICAL_SENSOR_ADDR "/dev/spidev0.0" ... int fd; fd = open(OPTICAL_SENSOR_ADDR, O_RDWR); if (fd<=0) { printf("Device not found\n"); exit(1); } uint8_t buffer1[1] = {0x3a}; uint8_t buffer2[1] = {0}; spidevReadRegister(fd, 1, buffer1, 1, buffer2); When I run it, the code get stuck on IOCTL! I did this way because, in order to read a register on the sensor, I need to send a byte with its address in it and then get the answer back without changing CS (however, when I tried using write() and read() functions, while learning, I got the same result, stuck on them). I'm aware that specifying .speed_hz causes a ENOPROTOOPT error on Atmel (I checked spidev.c) so I commented that part. Why does it get stuck? I though it can be as the device is created but it actually doesn't "feel" any hardware. As I wasn't sure if hardware SPI0 corresponded to bus_num 0 or 1, I tried both, but still no success (btw, which one is it?). UPDATE: I managed to have the SPI working! Half of it.. MOSI is transmitting the right data, but CLK doesn't start... any idea?

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apache tomcat loadbalancing clustering on ubuntu

- by user740010

i am facing a problem in clustering the tomcat with apache as a loadbalancer using mod_jk on ubuntu. i have install apache2 on my ubuntu 11.04 and i have downloaded tomcat7 created two copies and kept them at two different location. 1st one is at /home/net4u/vishal/test/tomcatA 2nd one is at /home/net4u/vishal/test1/tomcatB i have made following changes to server.xml file in /conf folder 1. <Server port="8205" shutdown="SHUTDOWN"> 2. <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> 3.<Connector port="8209" protocol="AJP/1.3" redirectPort="8443" /> <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB"> 4. <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> similarly i have modified other tomcat i.e tomcatA server.xml content of the server.xml is as follow: --    <Connector port="8280" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />      <Connector port="8109" protocol="AJP/1.3" redirectPort="8443" />   <Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcatB">   <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>  <Realm className="org.apache.catalina.realm.LockOutRealm">  <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> </Realm> <Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true">    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" pattern="%h %l %u %t "%r" %s %b" resolveHosts="false"/> </Host> </Engine> i have install libapache2-mod-jk step 1. i have Created jk.load file in /etc/apache2/mods-enabled/jk.load content is as follows: LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so Create /etc/apache2/mods-enabled/jk.conf: JkWorkersFile /etc/apache2/workers.properties JkLogFile /var/log/apache2/jk.log JkMount /ecommerce/* worker1 JkMount /images/* worker1 JkMount /content/* worker1 step 2. Created workers.properties file in /etc/apache2/workers.properties content is as follows: workers.tomcat_home=/home/vishal/Desktop/test/tomcatA workers.java_home=/usr/lib/jvm/default-java ps=/ worker.list=tomcatA,tomcatB,loadbalancer worker.tomcatA.port=8109 worker.tomcatA.host=localhost worker.tomcatA.type=ajp13 worker.tomcatA.lbfactor=1 worker.tomcatB.port=8209 worker.tomcatB.host=localhost worker.tomcatB.type=ajp13 worker.tomcatB.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balanced_workers=tomcatA,tomcatB worker.loadbalancer.sticky_session=1 i tried the same thing on the windows machine it is working.

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Is there any way to use arrays in a puppet module (not in template)?

- by KARASZI István

I want to use puppet to manage a hadoop cluster. On the machines we have several directories which must be created and set permissions. But i'm unable to add array values for defined methods. define hdfs_site( $dirs ) { file { $dirs: ensure => directory, owner => "hadoop", group => "hadoop", mode => 755; } file { "/opt/hadoop/conf/hdfs-site.xml": content => template("hdfs-site.xml.erb"), owner => "root", group => "root", mode => 644; } } define hadoop_slave( $mem, $cpu, $dirs ) { hadoop_base { mem => $mem, cpu => $cpu, } hdfs_site { dirs => $dirs, } } hadoop_base is similar to hdfs_site. Thanks!

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How to create Raid 10 with megacli

- by Henno

I have OpenFiler storage server. Without installing Windows and MSM, I want to create raid10 array from disks 2 to 21. I have already successfully installed MegaCli to OpenFiler but I'm stuck in figuring out the correct command line for creating a raid 10 array. The documentations says that the syntax for creating a raid 10 is: MegaCli -CfgSpanAdd -r10 -Array0[E:S,E:S] -Array1[E:S,E:S] -aN My enclosure ID is 25, so: [root@linux-h5ut ~]# MegaCli -CfgSpanAdd -r10 -Array0[E25:S02,E25:S21] -Array1[E25:S02,E25:S21] WB Cached NoCachedBadBBU -a0 Invalid input at or near token E I have googled high and low but there doesn't seem to be any example doing raid10 with megaraid (only the syntax). Can anyone explain what is wrong?

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Is it possible to set a folder as Cookieless in IIS7 ?

- by Pure.Krome

Is it possible to define a particular folder to be cookieless in IIS7, instead of just the root?

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Why do I get error "prefix [..] is not defined" when I try to use my jsf custom tag?

- by Roman

I created a jsf custom tag (I'm not sure that it's correct, I could miss something easily, so I attached code below). Now I'm trying to use this tag but I get an error: error on line 28 at column 49: Namespace prefix gc on ganttchart is not defined So, here is the xhtml-page: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:gc="http://myganttchart.org"> <body> <ui:composition template="/masterpage.xhtml"> <ui:define name="title">Gantt chart test</ui:define> <ui:define name="content"> <f:view> <gc:ganttchart width="300" height="100" rendered="true"/> ... </f:view> </ui:define> </ui:composition> </body> </html> And here is tld-file (it's placed in WEB-INF/): <taglib xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.1"> <tlib-version> 1.0 </tlib-version> <short-name> oext </short-name> <uri> http://myganttchart.org </uri> <tag> <name>ganttchart</name> <tag-class>usermanagement.support.ganttchart.GanttChartTag</tag-class> <body-content>empty</body-content> <attribute> <name>binding</name> <deferred-value> <type>javax.faces.component.UIComponent</type> </deferred-value> </attribute> ... </tag> </tablib> Here is a part of tag-class code: public class GanttChartTag extends UIComponentELTag { private ValueExpression width; private ValueExpression height; private ValueExpression styleClass; public String getComponentType () { return "org.myganttchart"; } public String getRendererType () { return null; } ... } Correspondent block from faces-config: <component> <component-type>org.myganttchart</component-type> <component-class>usermanagement.support.ganttchart.UIGanttChart</component-class> </component> And the last part if UIGanttChart: public class UIGanttChart extends UIOutput { public UIGanttChart() { setRendererType (null); } //some test code public void encodeBegin(FacesContext context) throws IOException { ResponseWriter writer = context.getResponseWriter (); writer.startElement("img", this); writer.writeAttribute("src", "no-img", "source"); writer.writeAttribute("width", getAttributes ().get ("width"), "width"); writer.writeAttribute("height", getAttributes ().get ("height"), "height"); writer.writeAttribute("class", ".someclass", "styleClass"); writer.endElement("img"); } } So, what did I miss?

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Problem in transfering file from server to client using C sockets

- by coolrockers2007

I want to ask, why I cannot transfer file from server to client? When I start to send the file from server, the client side program will have problem. So, I spend some times to check the code, But I still cannot find out the problem Can anyone point out the problem for me? CLIENTFILE.C #include stdio.h #include stdlib.h #include time.h #include netinet/in.h #include fcntl.h #include sys/types.h #include string.h #include stdarg.h #define PORT 5678 #define MLEN 1000 int main(int argc, char *argv []) { int sockfd; int number,message; char outbuff[MLEN],inbuff[MLEN]; //char PWD_buffer[_MAX_PATH]; struct sockaddr_in servaddr; FILE *fp; int numbytes; char buf[2048]; if (argc != 2) fprintf(stderr, "error"); if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) fprintf(stderr, "socket error"); memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_port = htons(PORT); if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) fprintf(stderr, "connect error"); if ( (fp = fopen("/home/na/nall9047/write.txt", "w")) == NULL){ perror("fopen"); exit(1); } printf("Still NO PROBLEM!\n"); //Receive file from server while(1){ numbytes = read(sockfd, buf, sizeof(buf)); printf("read %d bytes, ", numbytes); if(numbytes == 0){ printf("\n"); break; } numbytes = fwrite(buf, sizeof(char), numbytes, fp); printf("fwrite %d bytes\n", numbytes); } fclose(fp); close(sockfd); return 0; } SERVERFILE.C #include stdio.h #include fcntl.h #include stdlib.h #include time.h #include string.h #include netinet/in.h #include errno.h #include sys/types.h #include sys/socket.h #includ estdarg.h #define PORT 5678 #define MLEN 1000 int main(int argc, char *argv []) { int listenfd, connfd; int number, message, numbytes; int h, i, j, alen; int nread; struct sockaddr_in servaddr; struct sockaddr_in cliaddr; FILE *in_file, *out_file, *fp; char buf[4096]; listenfd = socket(AF_INET, SOCK_STREAM, 0); if (listenfd < 0) fprintf(stderr,"listen error") ; memset(&servaddr, 0, sizeof(servaddr)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(PORT); if (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) fprintf(stderr,"bind error") ; alen = sizeof(struct sockaddr); connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &alen); if (connfd < 0) fprintf(stderr,"error connecting") ; printf("accept one client from %s!\n", inet_ntoa(cliaddr.sin_addr)); fp = fopen ("/home/na/nall9047/read.txt", "r"); // open file stored in server if (fp == NULL) { printf("\nfile NOT exist"); } //Sending file while(!feof(fp)){ numbytes = fread(buf, sizeof(char), sizeof(buf), fp); printf("fread %d bytes, ", numbytes); numbytes = write(connfd, buf, numbytes); printf("Sending %d bytes\n",numbytes); } fclose (fp); close(listenfd); close(connfd); return 0; }

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php-fpm start error

- by Sujay

I am using php-fpm. I recently recompiled php for including imap functions. But on php-fpm start it gives the following error: Starting php_fpm Error in argument 1, char 1: no argument for option - Usage: php-cgi [-q] [-h] [-s] [-v] [-i] [-f ] php-cgi [args...] -a Run interactively -C Do not chdir to the script's directory -c | Look for php.ini file in this directory -n No php.ini file will be used -d foo[=bar] Define INI entry foo with value 'bar' -e Generate extended information for debugger/profiler -f Parse . Implies `-q' -h This help -i PHP information -l Syntax check only (lint) -m Show compiled in modules -q Quiet-mode. Suppress HTTP Header output. -s Display colour syntax highlighted source. -v Version number -w Display source with stripped comments and whitespace. -z Load Zend extension ................................... failed What could be the problem? Is it in php-fpm.conf or php.ini.

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How Do I Change the Windows7 LAN Proxy Config from the Command Line

- by david.barkhuizen

In Windows7, Is it possible to define/change the proxy config from the command line ? So, using the gui, I would go: Start Control Panel Network and Internet Internet Options Connections LAN Settings and then - enable/disable the proxy - define IP:port of proxy server But I would like to rather do this from the command line (so that I can run the command from a batch-file with a shortcut key - enabling me to switch proxy configs using a short-cut, rather than having to wade through the MS wizard). I've looked at using netsh.exe to change the settings for WinHTTP, but this seems to be thr wrong thing to do, as the WinHTTP setting do not appear to be related to the LAN settings. Much appreciated folks.

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C language preprocessor behavior

- by khanna_param

There are different kind of macros in C language, nested macro is one of them. Considering a program with the following macro #define HYPE(x,y) (SQUR(x)+SQUR(y)) #define SQUR(x) (x*x) Using this we can successfully compile to get the result. As we all know the C preprocessor replaces all the occurrence of the identifiers with the replacement-string. Considering the above example I would like to know how many times the C preprocessor traverses the program to replace the macro with the replacement values. I assume it cannot be done in one go.

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C socket: problem with connect() and/or accept() between clients. 111: Connection refused

- by Fantastic Fourier

Hello ladies and gents, I'm having a bit of problem with accept(). I have a multiple clients and one server. The clients can connect and communicate just fine with server. But at one point, I need some clients to be directly connected to each other and I'm having a bit of difficulty there. The clients have bunch of threads going on, where one of them is handle_connection() and it has a while(1), looping forever to listen() and accept() whatever incoming connections. Whenever a client tries to connect() to other client, connect() returns an error, 111: Connection Refused. I know I have the right IP address and right port (I have specified a port just for between-client connections). The client that is waiting for connection doesn't notice anything, no new connection, nada. I copied some parts of the code, in hopes that someone can point out what I'm doing wrong. Thanks for any inputs! This is all client side code. void * handle_connections(void * arg) is a thread that loops forever to accept() any incoming connections. My server has a very similar thang going on and it works very well. (not sure why it doesn't work here..) This is the part of client that is waiting for a new incoming connection. int handle_request(void * arg, struct message * msg) is called at one point during program and tries to connect to a client that is specified in struct message * msg which includes struct sockaddr_in with IP address and port number and whatever. #define SERVER_PORT 10000 #define CLIENT_PORT 3456 #define MAX_CONNECTION 20 #define MAX_MSG 50 void * handle_connections(void * arg) { struct fd_info * info; struct sockaddr_in client_address; struct timeval timeout; fd_set readset, copyset; bzero((char * ) &client_address, sizeof(client_address)); // copy zeroes into string client_address.sin_family = AF_INET; client_address.sin_addr.s_addr = htonl(INADDR_ANY); client_address.sin_port = htons(CLIENT_PORT); sockfd = socket(AF_INET, SOCK_STREAM, 0); rv = listen(sockfd,MAX_CONNECTION); while(1) { new_sockfd = accept(sockfd, (struct sockaddr *) &client_address, &client_addr_len); //blocks if (new_sockfd < 0) { printf("C: ERROR accept() %i: %s \n", errno, strerror(errno)); sleep(2); } else { printf("C: accepted\n"); FD_SET(new_sockfd, &readset); // sets bit for new_sockfd to list of sockets to watch out for if (maxfd < new_sockfd) maxfd = new_sockfd; if (minfd > new_sockfd) minfd = new_sockfd; } //end if else (new_sockfd) } // end of the forever while loop } int handle_request(void * arg, struct message * msg) { char * cname, gname, payload; char * command[3]; int i, rv, sockfd, client_addr_len; struct sockaddr_in client_address; struct fd_info * info; info = (struct fd_info *) arg; sockfd = info->sock_fd; sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd == -1) { printf("HR: ERROR socket() %i: %s \n", errno, strerror(errno)); break; } else if (sockfd > 0) { printf("HR: new socks is %i \n", sockfd); printf("HR: sin_family is %i: %i\n", msg->peer.client_address.sin_family, msg->peer.client_address.sin_port); //************************************************************* //this is the part that returns error 111: Connection refused!!! //************************************************************* rv = connect(sockfd, (struct sockaddr *) &msg->peer.client_address, sizeof(struct sockaddr)); if (rv == -1) { printf("HR: ERROR: connect() %i: %s \n", errno, strerror(errno)); printf("HR: at %li \n", msg->peer.client_address.sin_addr.s_addr); break; } else if (rv > 0) { info->max_fd = sockfd; printf("HR: connected successfully!! \n"); } } }

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How Do I Change the Windows7 LAN Proxy Config from the Command Line

- by david.barkhuizen

In Windows7, Is it possible to define/change the proxy config from the command line ? So, using the gui, I would go: Start Control Panel Network and Internet Internet Options Connections LAN Settings and then - enable/disable the proxy - define IP:port of proxy server But I would like to rather do this from the command line (so that I can run the command from a batch-file with a shortcut key - enabling me to switch proxy configs using a short-cut, rather than having to wade through the MS wizard). I've looked at using netsh.exe to change the settings for WinHTTP, but this seems to be thr wrong thing to do, as the WinHTTP setting do not appear to be related to the LAN settings. Much appreciated folks.

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ASP.NET, URL Rewriting and threads on Linux?

- by acidzombie24

Right now converting my normal sql(ite) syntax into compatible MS Server syntax is driving me mad. My code seems to be mono compatible judging by MoMA. However in global.asax i start several threads in Application_Start to use as a service and excessive url rewrites in Application_BeginRequest (everything is rewriting into default.aspx which calls C# code/class baded on the url). The urls do not have extensions or my have false extentions ie mysite.com/username/page/title.lol - id I need it all to go to BeginRequest. I also need files to be downloadable. Usually the path will be rewritten as from /file/user/filename to /file/u/s/user/file. Would this be supported on linux+mono+a good webserver?

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How to change theme in Windows 7 with Powershell script?

- by Greg McGuffey

I would like to have a script that would change the current theme of Windows 7. I found the registry entry where this stored, but I apparently need to take some further action to get windows to load the theme. Any ideas? Here is the script that I'm trying to use, but isn't working (registry updated, but theme not changed): ###################################### # Change theme by updating registry. # ###################################### # Define argument which defines which theme to apply. param ( [string] $theme = $(Read-Host -prompt "Theme") ) # Define the themes we know about. $knownThemes = @{ "myTheme" = "mytheme.theme"; "alien" = "oem.theme" } # Identify paths to user themes. $userThemes = " C:\Users\yoda\AppData\Local\Microsoft\Windows\" # Get name of theme file, based on theme provided $themeFile = $knownThemes["$theme"] # Build path to theme and set registry. $newThemePath = "$userThemes$themeFile" $regPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Themes\" Set-ItemProperty -path $regPath -name CurrentTheme -value $newThemePath # Update system with this info...this isn't working! rundll32.exe user32.dll, UpdatePerUserSystemParameters Thanks!

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mount dev, proc, sys in a chroot environment?

- by Patrick

I'm trying to create a Linux image with custom picked packages. I followed the guide here http://www.olpcnews.com/forum/index.php?topic=4766.0 However, when I tried to install some packages, it failed to configure due to missing the proc, sys, dev directories. So, I learned from other places that I need to "mount" the host proc, ... directories to my chroot environment. Though, I saw two syntax and am not sure which one to use. In host machine: mount --bind /proc <chroot dir>/proc and another syntax (in chroot envrionment): mount -t proc none /proc Which one should I use, and what are the difference? Edit: What I'm trying to do is to hand craft the packages I'm going to use on an XO laptop, because compiling packages takes really long time on the real XO hardware, if I can build all the packages I need and just flash the image to the XO, I can save time and space.

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Maximum execution time of 300 seconds exceeded error while importing large MySQL database

- by Spacedust

I'm trying to import 641 MB MySQL database with a command: mysql -u root -p ddamiane_fakty < domenyin_damian_fakty.sql but I got an error: ERROR 1064 (42000) at line 2351406: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<br /> <b>Fatal error</b>: Maximum execution time of 300 seconds exceeded in <b' at line 253 However limits are set much higher: mysql> show global variables like "interactive_timeout"; +---------------------+-------+ | Variable_name | Value | +---------------------+-------+ | interactive_timeout | 28800 | +---------------------+-------+ 1 row in set (0.00 sec) and mysql> show global variables like "wait_timeout"; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wait_timeout | 28800 | +---------------+-------+ 1 row in set (0.00 sec)

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