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  • General logging won't work in MySQL

    - by leonstr
    I saw on SF that there's an option in MySQL to log all queries. So, in my version (mysql-server-5.0.45-7.el5 on CentOS 5.2) this appears to be a case of enabling the 'log' option, so I edited /etc/my.cnf to add this: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql old_passwords= log=/var/log/mysql-general.log [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I then created the file and set permissions: # touch /var/log/mysql-general.log # chown mysql. /var/log/mysql-general.log # ls -l /var/log/mysql-general.log -rw-r--r-- 1 mysql mysql 0 Jan 18 15:22 /var/log/mysql-general.log But when I start mysqld I get: 120118 15:24:18 mysqld started ^G/usr/libexec/mysqld: File '/var/log/mysql-general.log' not found (Errcode: 13) 120118 15:24:18 [ERROR] Could not use /var/log/mysql-general.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 120118 15:24:18 InnoDB: Started; log sequence number 0 182917764 120118 15:24:18 [Note] /usr/libexec/mysqld: ready for connections. Can anyone suggest why this isn't working?

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  • cups log kills ubuntu 12.04 and sudoer permissions changed

    - by peterretief
    I am using Ubuntu 12.04 as a desktop and recently had a weird crash with the log file for cups filling up the entire drive and not letting me back in, also what changed was /var/lib/sudo had changed from root to peter (me) I didn't make this change - I checked the history! I set the sudoers back to root and capped the max size for cups log Anyone had a similar experience? It feels like someone is messing around with my settings Is there any way to trace how the error occurred? Logs auth.log Jan 1 02:04:13 peter-desktop lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0) Jan 1 02:04:13 peter-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 Jan 1 02:06:53 peter-desktop lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0) Jan 1 02:06:53 peter-desktop lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 syslog Jan 1 02:04:13 peter-desktop rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="903" x-info="http://www.rsyslog.com"] start Jan 1 02:04:13 peter-desktop rsyslogd: rsyslogd's groupid changed to 103 Jan 1 02:04:13 peter-desktop rsyslogd: rsyslogd's userid changed to 101 Jan 1 02:04:13 peter-desktop rsyslogd-2039: Could not open output pipe '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ] Jan 1 02:04:13 peter-desktop bluetoothd[898]: Failed to init gatt_example plugin Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Initializing cgroup subsys cpuset Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Initializing cgroup subsys cpu Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Linux version 3.2.0-25-generic-pae (buildd@palmer) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #40-Ubuntu SMP Wed May 23 22:11:24 UTC 2012 (Ubuntu 3.2.0-25.40-generic-pae 3.2.18) Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] KERNEL supported cpus: Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] Intel GenuineIntel Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] AMD AuthenticAMD Jan 1 02:04:13 peter-desktop kernel: [ 0.000000] NSC Geode by NSC

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  • Identifying Httpd error log in Fedora 16

    - by Cerin
    How do you find the cause of httpd errors in Fedora 16? The new systemctl command in Fedora 16 seems to horribly obscure any useful logging info. [root@host ~]# systemctl start httpd.service Job failed. See system logs and 'systemctl status' for details. [root@host ~]# systemctl status httpd.service httpd.service - The Apache HTTP Server (prefork MPM) Loaded: loaded (/lib/systemd/system/httpd.service; enabled) Active: failed since Thu, 21 Jun 2012 16:26:56 -0400; 1min 23s ago Process: 2119 ExecStop=/usr/sbin/httpd $OPTIONS -k stop (code=exited, status=0/SUCCESS) Process: 2215 ExecStart=/usr/sbin/httpd $OPTIONS -k start (code=exited, status=1/FAILURE) Main PID: 1062 (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/httpd.service So the first command fails...and it tells me to run another command...which simply tells me that the command returned an error code. Where's the actual error? Even more frustrating is nothing seems to have been written to the logs: [root@host ~]# ls -lah /var/log/httpd/ total 8.0K drwx------. 2 root root 4.0K Jun 21 16:19 . drwxr-xr-x. 21 root root 4.0K Jun 20 16:33 .. -rw-r----- 1 root root 0 Jun 21 16:19 modsec_audit.log -rw-r----- 1 root root 0 Jun 21 16:19 modsec_debug.log

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  • Class member functions instantiated by traits [policies, actually]

    - by Jive Dadson
    I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched Stack Overflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate member functions? [Update: I used the wrong term here. It should be "policies" rather than "traits." Traits describe existing classes. Policies prescribe synthetic classes.] The question came up while modernizing a set of multivariate function optimizers that I wrote more than 10 years ago. The optimizers all operate by selecting a straight-line path through the parameter space away from the current best point (the "update"), then finding a better point on that line (the "line search"), then testing for the "done" condition, and if not done, iterating. There are different methods for doing the update, the line-search, and conceivably for the done test, and other things. Mix and match. Different update formulae require different state-variable data. For example, the LMQN update requires a vector, and the BFGS update requires a matrix. If evaluating gradients is cheap, the line-search should do so. If not, it should use function evaluations only. Some methods require more accurate line-searches than others. Those are just some examples. The original version instantiates several of the combinations by means of virtual functions. Some traits are selected by setting mode bits that are tested at runtime. Yuck. It would be trivial to define the traits with #define's and the member functions with #ifdef's and macros. But that's so twenty years ago. It bugs me that I cannot figure out a whiz-bang modern way. If there were only one trait that varied, I could use the curiously recurring template pattern. But I see no way to extend that to arbitrary combinations of traits. I tried doing it using boost::enable_if, etc.. The specialized state information was easy. I managed to get the functions done, but only by resorting to non-friend external functions that have the this-pointer as a parameter. I never even figured out how to make the functions friends, much less member functions. The compiler (VC++ 2008) always complained that things didn't match. I would yell, "SFINAE, you moron!" but the moron is probably me. Perhaps tag-dispatch is the key. I haven't gotten very deeply into that. Surely it's possible, right? If so, what is best practice? UPDATE: Here's another try at explaining it. I want the user to be able to fill out an order (manifest) for a custom optimizer, something like ordering off of a Chinese menu - one from column A, one from column B, etc.. Waiter, from column A (updaters), I'll have the BFGS update with Cholesky-decompositon sauce. From column B (line-searchers), I'll have the cubic interpolation line-search with an eta of 0.4 and a rho of 1e-4, please. Etc... UPDATE: Okay, okay. Here's the playing-around that I've done. I offer it reluctantly, because I suspect it's a completely wrong-headed approach. It runs okay under vc++ 2008. #include <boost/utility.hpp> #include <boost/type_traits/integral_constant.hpp> namespace dj { struct CBFGS { void bar() {printf("CBFGS::bar %d\n", data);} CBFGS(): data(1234){} int data; }; template<class T> struct is_CBFGS: boost::false_type{}; template<> struct is_CBFGS<CBFGS>: boost::true_type{}; struct LMQN {LMQN(): data(54.321){} void bar() {printf("LMQN::bar %lf\n", data);} double data; }; template<class T> struct is_LMQN: boost::false_type{}; template<> struct is_LMQN<LMQN> : boost::true_type{}; // "Order form" struct default_optimizer_traits { typedef CBFGS update_type; // Selection from column A - updaters }; template<class traits> class Optimizer; template<class traits> void foo(typename boost::enable_if<is_LMQN<typename traits::update_type>, Optimizer<traits> >::type& self) { printf(" LMQN %lf\n", self.data); } template<class traits> void foo(typename boost::enable_if<is_CBFGS<typename traits::update_type>, Optimizer<traits> >::type& self) { printf("CBFGS %d\n", self.data); } template<class traits = default_optimizer_traits> class Optimizer{ friend typename traits::update_type; //friend void dj::foo<traits>(typename Optimizer<traits> & self); // How? public: //void foo(void); // How??? void foo() { dj::foo<traits>(*this); } void bar() { data.bar(); } //protected: // How? typedef typename traits::update_type update_type; update_type data; }; } // namespace dj int main() { dj::Optimizer<> opt; opt.foo(); opt.bar(); std::getchar(); return 0; }

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  • TFS 2012: Backup Plan Fails with empty log file

    - by Vitor
    I have a Team Foundation Server 2012 installation with Power Tools, and I defined a backup plan using the wizard found in the "Database Backup Tools" in the Team Foundation Server Administration Console. I set the backup plan to do a full database backup on Sunday mornings, to another server in the network. I followed the wizard with no problems and the Backup Plan was set successfully. However when the backup runs it returns Error as result and when I go to the log file I only get the header and no further info: [Info @01:00:01.078] ==================================================================== [Info @01:00:01.078] Team Foundation Server Administration Log [Info @01:00:01.078] Version : 11.0.50727.1 [Info @01:00:01.078] DateTime : 11/25/2012 02:00:01 [Info @01:00:01.078] Type : Full Backup Activity [Info @01:00:01.078] User : <backup user> [Info @01:00:01.078] Machine : <TFS Server> [Info @01:00:01.078] System : Microsoft Windows NT 6.2.9200.0 (AMD64) [Info @01:00:01.078] ==================================================================== I can imagine it's a permission problem, but I have no idea where to start ... Can anyone help? Thank you for your time! EDIT I'm not sure if it is related, but I logged in with "backup user" in "TFS Server" and there was this crash window opened with "TFS Power Tool Shell Extension (TfsComProviderSvr) has stopped working". The full crash log is here: Problem signature: Problem Event Name: APPCRASH Application Name: TfsComProviderSvr.exe Application Version: 11.0.50727.0 Application Timestamp: 5050cd2a Fault Module Name: StackHash_e8da Fault Module Version: 6.2.9200.16420 Fault Module Timestamp: 505aaa82 Exception Code: c0000374 Exception Offset: PCH_72_FROM_ntdll+0x00040DA8 OS Version: 6.2.9200.2.0.0.272.7 Locale ID: 1043 Additional Information 1: e8da Additional Information 2: e8dac447e1089515a72386afa6746972 Additional Information 3: d903 Additional Information 4: d9036f986c69f4492a70e4cf004fb44d Does it help? Thanks everyone!

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  • Exchange DiskShadow/Robocopy backup does not purge log files

    - by Robert Allan Hennigan Leahy
    I have a series of scripts setup to backup my Exchange. The following command is executed to start the process: diskshadow /s C:\Backup_Scripts\exchangeserverbackupscript1.dsh This is exchangeserverbackupscript1.dsh: #DiskShadow script file set verbose on #delete shadows all set context persistent writer verify {76fe1ac4-15f7-4bcd-987e-8e1acb462fb7} set metadata C:\Backup_Scripts\shadowmetadata.cab begin backup add volume C: alias SH1 create expose %SH1% P: exec C:\Backup_Scripts\exchangeserverbackupscript1.cmd end backup delete shadows exposed P: exit #End of script And this is exchangeserverbackupscript1.cmd: robocopy "P:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group" "\\leahyfs\J$\E-Mail Backups\Day 1" /MIR /R:0 /W:0 /COPY:DT /B This is not causing Exchange to purge its log files. The edb file is 4.7 gigabytes, but the First Storage Group folder itself is 50+ gigabytes due to many, many log files for each day going back to 2009. Is there any way -- I've Googled and haven't found anything -- to notify Exchange when I've completed a full backup, and have it purge its log files? According to this and this, end backup should cause Exchange to "flush the transaction logs for that storage group" but only "if a successful backup of a storage group occurred", which leaves my question as: What constitutes a "successful backup", and why is what I'm doing not it?

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  • Libtool versioning of a library that depends on other libraries.

    - by Artyom
    Hello, I have a framework that uses Boost and CgiCC in the core application and in its interface. How should I version the library binary interface (a.k.a. libtool -version-info)? I have no problems tracking the changes in library itself when I make various changes. As it is clear for me how should I version. But... Both Boost and CgiCC libraries do not provide any backward compatible API/ABI and my library may be linked with quite arbitrary versions Boost and CgiCC so I can't provide any promise about the interfaces, so I can't really specify -version-info because even the same library compiled against different versions of Boost and CgiCC would not be compatible. So... What should I do? How should I version library? I know that I should not depend on Boost and CgiCC interfaces in first place, but this is what I get so far for existing stable version. This issue is addressed in next major release but I still have and want to maintain current release as it is very valuable.

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  • Dell OpenManage On Ubuntu Server 12.04 Cannot Log In

    - by Austin
    I have a Dell Poweredge 2950 with 2X130GB and 2X2TB drives. I need to set them up in a RAID 1 array so that the 130GB Drives are mirrored and host the OS, while the 2TB drives are mirrored and are the content drives. So I go from 4 disks, down to two, one 130GB and one 2TB. I can do that in the BIOS RAID utility no problem. But I need to be able to manage the RAID arrays and be able to expand them WITHOUT shutting down the server. Now, to my understanding, openmanage will allow me to do that AND it runs on ubuntu. So I go and set it up and try to log into the web interface at and it will not let me log in. I have followed dell's guide to set up openmanage, even added the usernames to the files and permissions and such, however, cannot get it to let me log in or anything. I have reinstalled Openmanage several times, even reinstalled the OS three times, and nothing works. Google does not help either. It simply says login failed after hitting submit. Please Help

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  • Auto Log-Off Windows users - Windows 2003 domain

    - by thehatter
    Hi! I am trying to make windows clients automatically log off after some time, I have been trying to use the winexit.scr which I have seen working else where in a similar environment. After working though these instructions (I did read the comments and notice the original ADM provided is buggy) I've had no joy what so ever! Winexit.scr refuses to read any settings in the registry, even while using a test account I can access the required reg key(s); edit, add, and remove values. Essentially winexit.scr always uses it's default values: 30 second timeout, no forced log-out. What I really want is a 30 minute timeout with a forced log-out, closing all the users apps etc. I've tried removing and re-adding the ADM template, creating the GPO from scratch several times, giving various registry permissions - including full control to "Everybody" just for fun! Oh, clients are all win XP SP3, DC is win 2003 R2 SP2. So, can anybody suggest something? Cheers!

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  • Do I need to restart my server after editing fstab and mtab?

    - by jaypabs
    I'm just wondering if I need to restart my server after editing fstab and mtab. I changed something in this file manually due to problem with awstats report. I am using ISPConfig 3 with the help of the tutorial from howtoforge. But due to removing/deleting of some account, the configuration of fstab and mtab messed up. I also ask this question at howtoforge forum but until now no one has answered. If you'd like to read my question please visit it here. I tried very hard to fix the problem w/o luck. Update: Here's what happen to my fstab: Before the value was (I omitted the other): /var/log/ispconfig/httpd/mydomain.com /var/www/clients/client1/web1/log none bind,nobootwait 0 0 /var/log/ispconfig/httpd/example.com /var/www/clients/client1/web2/log none bind,nobootwait 0 0 So I changed it to the correct path: /var/log/ispconfig/httpd/mydomain.com /var/www/clients/client1/web2/log none bind,nobootwait 0 0 /var/log/ispconfig/httpd/example.com /var/www/clients/client1/web3/log none bind,nobootwait 0 0 I also found mtab to have the same value as above that's why I edited it manually. from: /var/log/ispconfig/httpd/mydomain.com /var/www/clients/client1/web1/log none rw,bind 0 0 /var/log/ispconfig/httpd/example.com /var/www/clients/client1/web2/log none rw,bind 0 0 to: /var/log/ispconfig/httpd/mydomain.com /var/www/clients/client1/web2/log none rw,bind 0 0 /var/log/ispconfig/httpd/example.com /var/www/clients/client1/web3/log none rw,bind 0 0 I edited those value because the correct path of mydomain.com and example.com should be under web2 and web3 folder respectively. As of now the log of example.com is pointed to: /var/www/clients/client1/web2/log when it should be: /var/www/clients/client1/web3/log So I am thinking that this is because of fstab and mtab. Please guide me how to point the log correctly to it's default directory. I explain the scenario one by one at this link. to dawud: Based on your example mount -o remount,noexec /var, should I run mount -o remount,noexec /var/log/ispconfig/httpd/example.com?

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  • Explorer.exe keeps crashing during log in

    - by asif
    I have got a weird problem. My windows 7 has two user accounts (both are administrator). I can log in to one account and do all sort of work. But whenever I try to log in to other account, it shows a blank screen and a messagebox pops up with "windows explorer has stopped working". The options available are: Close the program Check online for a solution and close the program The problem signature is as follows: Problem Event Name: InPageError Error Status Code: c000009c Faulting Media Type: 00000003 OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1033 Additional Information 1: 0a9e Additional Information 2: 0a9e372d3b4ad19135b953a78882e789 Additional Information 3: 0a9e Additional Information 4: 0a9e372d3b4ad19135b953a78882e789 If I press alt+ctrl+del and then select start task manager, it also crashes. I can not run any program using runas command (from good profile) too. The task manager and runas programs all show same problem signature. I read the similar question and followed all the steps, but no luck. Later, I viewed the event log and found that, explorer.exe could not access a file. I checked the location but the file is there. The actual message is: Windows cannot access the file C:\Users\testuser\AppData\Local\Microsoft\Windows\Caches\{AFBF9F1A-8EE8-4C77-AF34-C647E37CA0D9}.1.ver0x0000000000000020.db for one of the following reasons: there is a problem with the network connection, the disk that the file is stored on, or the storage drivers installed on this computer; or the disk is missing. Windows closed the program Windows Explorer because of this error. The question is, how can I resolve this issue? Should I just delete the file or replace it with another one to stop explorer.exe from crashing? offtopic: What is the content of this file and why it is necessary?

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  • Proftpd log issue

    - by ggenov
    Hi, I'm developing an application where I read the current changes in certain folders on the server via FTP. The problem is that on files which begin with non-standart symbols as "~" the FTP server doesn't write full path name in the log Here is a part of my log: myuser [14/Jun/2010:20:50:11 +0000] ::ffff:217.145.84.66 [STOR] [/home/myuser/public_html/galleries/~ajax-loader.gif] myuser [14/Jun/2010:20:50:11 +0000] ::ffff:217.145.84.66 [MFMT] [-] myuser [14/Jun/2010:20:50:11 +0000] ::ffff:217.145.84.66 [MLST] [-] myuser [14/Jun/2010:23:50:11 +0300] ::ffff:217.145.84.66 [MLST] [-] myuser [14/Jun/2010:20:50:11 +0000] ::ffff:217.145.84.66 [MLST] [-] myuser [14/Jun/2010:20:50:12 +0000] ::ffff:217.145.84.66 [PASV] [-] myuser [14/Jun/2010:20:50:12 +0000] ::ffff:217.145.84.66 [STOR] [/home/myuser/public_html/galleries/~~ajax-loader.gif                                                                                            ] myuser [14/Jun/2010:20:50:12 +0000] ::ffff:217.145.84.66 [MFMT] [-] myuser [14/Jun/2010:20:50:12 +0000] ::ffff:217.145.84.66 [MLST] [-] myuser [14/Jun/2010:23:50:12 +0300] ::ffff:217.145.84.66 [MLST] [-] myuser [14/Jun/2010:23:50:22 +0300] ::ffff:217.145.84.66 [DELE] [] As you can see, all operations work very well except [DELE] command. My proftpd.conf file and its log's settings: LogFormat               default "%U %t %a [%m] [%f]" ExtendedLog             /var/log/proftpd ALL default #SystemLog               /var/log/proftpd ALL default #TransferLog             /var/log/proftpd ALL default Does anybody have a solution for this issue ?

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  • Diagnosing Logon Audit Failure event log entries

    - by Scott Mitchell
    I help a client manage a website that is run on a dedicated web server at a hosting company. Recently, we noticed that over the last two weeks there have been tens of thousands of Audit Failure entries in the Security Event Log with Task Category of Logon - these have been coming in about every two seconds, but interesting stopped altogether as of two days ago. In general, the event description looks like the following: An account failed to log on. Subject: Security ID: SYSTEM Account Name: ...The Hosting Account... Account Domain: ...The Domain... Logon ID: 0x3e7 Logon Type: 10 Account For Which Logon Failed: Security ID: NULL SID Account Name: david Account Domain: ...The Domain... Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Sub Status: 0xc0000064 Process Information: Caller Process ID: 0x154c Caller Process Name: C:\Windows\System32\winlogon.exe Network Information: Workstation Name: ...The Domain... Source Network Address: 173.231.24.18 Source Port: 1605 The value in the Account Name field differs. Above you see "david" but there are ones with "john", "console", "sys", and even ones like "support83423" and whatnot. The Logon Type field indicates that the logon attempt was a remote interactive attempt via Terminal Services or Remote Desktop. My presumption is that these are some brute force attacks attempting to guess username/password combinations in order to log into our dedicated server. Are these presumptions correct? Are these types of attacks pretty common? Is there a way to help stop these types of attacks? We need to be able to access the desktop via Remote Desktop so simply turning off that service is not feasible. Thanks

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  • Recommendations for a C++ polymorphic, seekable, binary I/O interface

    - by Trevor Robinson
    I've been using std::istream and ostream as a polymorphic interface for random-access binary I/O in C++, but it seems suboptimal in numerous ways: 64-bit seeks are non-portable and error-prone due to streampos/streamoff limitations; currently using boost/iostreams/positioning.hpp as a workaround, but it requires vigilance Missing operations such as truncating or extending a file (ala POSIX ftruncate) Inconsistency between concrete implementations; e.g. stringstream has independent get/put positions whereas filestream does not Inconsistency between platform implementations; e.g. behavior of seeking pass the end of a file or usage of failbit/badbit on errors Don't need all the formatting facilities of stream or possibly even the buffering of streambuf streambuf error reporting (i.e. exceptions vs. returning an error indicator) is supposedly implementation-dependent in practice I like the simplified interface provided by the Boost.Iostreams Device concept, but it's provided as function templates rather than a polymorphic class. (There is a device class, but it's not polymorphic and is just an implementation helper class not necessarily used by the supplied device implementations.) I'm primarily using large disk files, but I really want polymorphism so I can easily substitute alternate implementations (e.g. use stringstream instead of fstream for unit tests) without all the complexity and compile-time coupling of deep template instantiation. Does anyone have any recommendations of a standard approach to this? It seems like a common situation, so I don't want to invent my own interfaces unnecessarily. As an example, something like java.nio.FileChannel seems ideal. My best solution so far is to put a thin polymorphic layer on top of Boost.Iostreams devices. For example: class my_istream { public: virtual std::streampos seek(stream_offset off, std::ios_base::seekdir way) = 0; virtual std::streamsize read(char* s, std::streamsize n) = 0; virtual void close() = 0; }; template <class T> class boost_istream : public my_istream { public: boost_istream(const T& device) : m_device(device) { } virtual std::streampos seek(stream_offset off, std::ios_base::seekdir way) { return boost::iostreams::seek(m_device, off, way); } virtual std::streamsize read(char* s, std::streamsize n) { return boost::iostreams::read(m_device, s, n); } virtual void close() { boost::iostreams::close(m_device); } private: T m_device; };

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  • Using static mutex in a class

    - by Dmitry Yudakov
    I have a class that I can have many instances of. Inside it creates and initializes some members from a 3rd party library (that use some global variables) and is not thread-safe. I thought about using static boost::mutex, that would be locked in my class constructor and destructor. Thus creating and destroying instances among my threads would be safe for the 3rd party members. class MyClass { static boost::mutex mx; // 3rd party library members public: MyClass(); ~MyClass(); }; MyClass::MyClass() { boost::mutex::scoped_lock scoped_lock(mx); // create and init 3rd party library stuff } MyClass::~MyClass() { boost::mutex::scoped_lock scoped_lock(mx); // destroy 3rd party library stuff } I cannot link because I receive error: undefined reference to `MyClass::mx` Do I need some special initialization of such static member? Is the whole conception of static mutex wrong?

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  • Looking for way to log process terminations on OS X (Mac)

    - by Stan Sieler
    I'm looking for a way to log all process terminations on my Mac (OS X 10.6.8). (And see pid, timestamp, process name) I've implemented something similar for HP-UX, but it required a kernel-level driver and intercepting several variations of "exit()" (the normal one, and the one invoked on behalf of a process while it's aborting). Why do I want the info? I've been seeing messages in my system log file (dmesg) like: CODE SIGNING: cs_invalid_page(0x1000): p=91550[GoogleSoftwareUp] clearing CS_VALID CODE SIGNING: cs_invalid_page(0x1000): p=92088[GoogleSoftwareUp] clearing CS_VALID Although dmesg lacks timestamps, apps/Utilities/Console : Database : all : search for CS_VALID shows that the messages appears about once every 58 1/2 minutes. I suspect the number after "p=" is a process id (pid) ... but for a process that has long since terminated by the time I see the message. So, if there was a process termination log mechanism that recorded the pid, the time of termination, the reason for termination, and the process name (at time of termination), that would probably allow me to determine who's causing those errors to be logged! (No, I'm not running Chrome on my Mac, and "ps -ef | grep -i goog" gets no hits either ... I'm not consciously running any Google apps on the Mac) thanks, Stan [email protected]

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  • SQL Server log backups "stalling"

    - by MattK
    I have interited a box running SQL Server 2008 and Windows 2003, and have had a few events where largeish (35GB) log backups "stall", both before and after the installation of SQL 2008 SP1. The server log ships to a standby, so regular log backups are taken at 15 minute intervals. However, after an index reorg causes the log to grow to about 35GB (on a DB with about 17GB of data), the next log backup runs to ~95% completion, then seems to stop. The process shows as suspended, with a wait state of BACKUPIO. CPU, read, and write activity on the SPID also does not change, and the process stays in this state for hours, when normally a backup of this size should complete in about 20 minutes. This server has a single RAID-1 volume, thus the source database files and destination backup files are on the same volume. However, I cannot determine if another process is blocking the backup. The backup SPID cannot be killed, and the only way to terminate the log backup and clear the lock on the backup file is to cycle the SQL Server service. There was one event where the backup terminated completely, with an error that another process had locked the backup file, but no details about what that process was. Can anyone suggest a cause or diagnostic process to this situation?

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  • repeated entries in website log file

    - by Reza
    I am writing an ad hoc log analyser for my website log file. The following is part of the log file in which it shows file1.pdf has been downloaded twice. Looking carefully, the time stamp and IP address are exactly the same in both entries. How can it be possible to have 2 downloads at the same time by the same person. Should I count it as 2 in my programme or as 1? Any reply is appreciated. name_of_subdomain xxx.xxx.xx.xx - - [02/Apr/2012:09:13:31 +0100] "GET /file1.pdf HTTP/1.1" 206 3706 "-" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; CMDTDF)" name_of_subdomain xxx.xxx.xx.xx - - [02/Apr/2012:09:13:31 +0100] "GET /file1.pdf HTTP/1.1" 206 425462 "-" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; CMDTDF)"

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  • Casting a container of shared_ptr

    - by Jamie Cook
    Hi all, I have a method void foo(list<shared_ptr<Base>>& myList); Which I'm trying to call with a two different types of lists, one of DerivedClass1 and one of DerivedClass2 list<shared_ptr<DerivedClass1>> myList1; foo(myList1); list<shared_ptr<DerivedClass2>> myList2; foo(myList2); However this obviously generates a compiler error error: a reference of type "std::list<boost::shared_ptr<Base>, std::allocator<boost::shared_ptr<Base>>> &" (not const-qualified) cannot be initialized with a value of type "std::list<boost::shared_ptr<DerivedClass1>, std::allocator<boost::shared_ptr<DerivedClass1>>>" Is there any easy way to cast a container of shared_ptr? Of alternate containers that can accomplish this?

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  • Log connections to program

    - by Zac
    Besides for using iptables to log incoming connections.. Is there a way to log established inbound connections to a service that you don't have the source to (suppose the service doesn't log stuff like this on its own)? What I'm wanting to do is gather some information based on who's connecting to be able to tell things like what times of the day the service is being used the most, where in the world the main user base is, etc. I am aware I can use netstat and just hook it up to a cron script, but that might not be accurate, since the script could only run as frequently as a minute. Here is what I am thinking right now: Write a program that constantly polls netstat, looking for established connections that didn't appear in the previous poll. This idea seems like such a waste of cpu time though, since there may not be a new connection.. Write a wrapper program that accepts inbound connections on whatever port the service runs on, but then I wouldn't know how to pass that connection along to the real service. Edit: Just occurred to me that this question might be better for stackoverflow, though I am not certain. Sorry if this is the wrong place.

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  • C++: conjunction of binds?

    - by Helltone
    Suppose the following two functions: #include <iostream> #include <cstdlib> // atoi #include <cstring> // strcmp #include <boost/bind.hpp> bool match1(const char* a, const char* b) { return (strcmp(a, b) == 0); } bool match2(int a, const char* b) { return (atoi(b) == a); } Each of these functions takes two arguments, but can be transformed into a callable object that takes only one argument by using (std/boost)bind. Something along the lines of: boost::bind(match1, "a test"); boost::bind(match2, 42); I want to be able to obtain, from two functions like these that take one argument and return bool, a callable object that takes two arguments and returns the && of the bools. The type of the arguments is arbitrary. Something like an operator&& for functions that return bool.

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  • Which libraries use the "We Know Where You Live" optimization for std::make_shared?

    - by KnowItAllWannabe
    Over two years ago, Stephan T. Lavavej described a space-saving optimization he implemented in Microsoft's implementation of std::make_shared, and I know from speaking with him that Microsoft has nothing against other library implementations adopting this optimization. If you know for sure whether other libraries (e.g., for Gnu C++, Clang, Intel C++, plus Boost (for boost::make_shared)) have adopted this implementation, please contribute an answer. I don't have ready access to that many make_shared implementations, nor am I wild about digging into the bowels of the ones I have to see if they've implemented the WKWYL optimization, but I'm hoping that SO readers know the answers for some libraries off-hand. I know from looking at the code that as of Boost 1.52, the WKWYL optimization had not been implemented, but Boost is now up to version 1.55. Note that this optimization is different from std::make_shared's ability to avoid a dedicated heap allocation for the reference count used by std::shared_ptr. For a discussion of the difference between WKWYL and that optimication, consult this question.

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  • What's the bug in the following code ?

    - by Johannes
    #include <iostream> #include <algorithm> #include <vector> #include <boost/array.hpp> #include <boost/bind.hpp> int main() { boost::array<int, 4> a = {45, 11, 67, 23}; std::vector<int> v(a.begin(), a.end()); std::vector<int> v2; std::transform(v.begin(), v.end(), v2.begin(), boost::bind(std::multiplies<int>(), _1, 2)); std::copy(v2.begin(), v2.end(), std::ostream_iterator<int>(std::cout, " ")); } When run, this gives a creepy segmentation fault. Please tell me where I'm going wrong.

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  • Calculate rolling / moving average in c or c++

    - by Biohazard
    I know this is achievable with boost as per: Using boost::accumulators, how can I reset a rolling window size, does it keep extra history? But I really would like to avoid using boost. I have googled and not found any suitable or readable examples. Basically I want to track the moving average of an ongoing stream of a stream of floating point numbers using the most recent 1000 numbers as a data sample. What is the easiest way to achieve this?

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