1. There is no tcp_wrappers-devel in CentOS 5.
2. The perl libraries are in the main perl package and not in perl-devel.
3. lm_sensors-devel is not at version 3.

BuildRoot: % _tmppath /% name -% version -% release -root
%global RPM_BUILD_ROOT % buildroot 

Requires: net-snmp-sysvinit

Requires(post): net-snmp-sysvinit 

%if % rhel  <= 5
BuildRequires: perl
%else
BuildRequires: perl-devel
%endif

1. No tcp-wrapper support, we don't care but that should be just another package name issue for the conditional Requires, simililar to the perl isssue.
2. No mysql support. We do not care, one could change that and/or make it conditional or build against newer mysql releases where the -lib package is split.
3. No DTLS support on CentOS 5. We do not care and that is not easy to fix.
4. You've to install the net-snmp-sysvinit script to get back the usual setup you'd expect.
5. We ripped out the systemd support, I did not investigate yet if it's possible to keep that included and just not enable it.

1. If you build a src.rpm with mock you've to copy it out of the result directory before you rebuild it with mock to create the binary package. Mock deletes everything from the result directory when starting a new build. So I guess parallel builds for the same chroot will not work.
2. Depedencies on files instead of packages are a strange thing.
3. How on earth do you maintain a patchset of over a hundred patches without something like quilt? I guess you always have to apply them in a for loop on your source directory and then you create a copy of that to implement your modifications and create another patch. I'm pretty sure eight years ago Fedora was far away from using git so I would rule out patch branches in a VCS for the moment. Not sure what they invented inside RedHat to keep track of it.

• CVE triage: I pushed 19 commits to the security tracker. I also tried to encourage some maintainers to provide security updates for packages that are not in use by the current LTS sponsors and that are thus not in our priority list.
• DLA 87: dbus update fixing 3 CVE
• DLA 93: libgcrypt11 update fixing 1 CVE
• DLA 96: openjdk-6 security update fixing 21 CVE
• Worked on preparing a security update to linux. It s not released yet.

• #768256 about huge vim icons in the GNOME contextual menus
• #768540: cdebootstrap: fails to bootstrap old releases with dpkg not supporting data.tar.xz
• #770011: lynx -dump badly converting …

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• Ensure the binaries and data are installed into the right places in the directory hierarchy. Binaries must go to $prefix/bin, for example.
• Ensure that configuration can be found under /etc as well as under $prefix/etc

cd /path/to/my/project
lipkgen make-template

Format-Version: 1.0

Requires: Qt5Core (>= 5.3), Qt5DBus (>= 5.3), libpng12

lipkgen build pkginstall/

sudo lipa install package.ipk

runapp $ component_id -$ version :/bin/binary-name

int
foo()
 
        int *p, *q;
        p = q = 0;
        p = p;
        if (p == p)
                return 1;
        if ((p == q))
                return 2;
        return 0;
 

1. Use CCACHE_CPP2, as discussed in part 2. With ccache 3.2, you can now also put this into a configuration file: run_second_cpp = true in ~/.ccache/ccache.conf
2. Turn off the warnings mentioned above: -Wno-parentheses-equality, -Wno-tautological-compare, -Wno-self-assign (and any others you might find). One might think that these are actually useful warnings that one might want to keep, but GCC doesn t warn about them, and if you develop primarily with GCC, your code might contain these issues anyway. In particular, I have found that -Wno-tautological-compare is necessary for legitimate code.

• clang-3.5
  • Using ccache is 10% slower than not using it at all.
  • Using ccache with CCACHE_CPP2 on is another 10% slower.
• gcc-4.8
  • Using ccache is 19% slower than not using it at all.
  • Using ccache with CCACHE_CPP2 is another 9% slower.

run_second_cpp = true

• part of the time it was not seen at all, the block device was a generic kernel: scsi 21:0:0:0: Direct-Access USB TO I DE/SATA Device 0008 PQ: 0 ANSI: 0
• part of the time it was seen, i.e. the block device was visible as kernel: scsi 22:0:0:0: Direct-Access Samsunp w 0 EVO 500G 0008 PQ: 0 ANSI: 0, but with lots of ATA errors
• it took ~10 minutes before I was able to access it at all
• access to the disk when it was visible and not erroring out was slow; e.g. a cfdisk /dev/sdb could take >5 seconds before showing the screen

20:22:57 kernel: ata2.00: ATA-9: Samsung SSD 840 EVO 500GB, EXT0BB6Q, max UDMA/133
20:22:57 kernel: ata2.00: 976773168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
20:22:57 kernel: ata2.00: configured for UDMA/133
20:22:57 kernel: scsi 3:0:0:0: Direct-Access     ATA      Samsung SSD 840  EXT0 PQ: 0 ANSI: 5
20:22:57 kernel: sd 3:0:0:0: [sdc] 488397168 512-byte logical blocks: (250 GB/232 GiB)
20:22:57 kernel: sd 3:0:0:0: [sdc] Write Protect is off
20:22:57 kernel: sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
20:22:57 kernel: sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
20:22:57 kernel: ata2.00: exception Emask 0x0 SAct 0x2 SErr 0x400001 action 0x6 frozen
20:22:57 kernel: ata2: SError:   RecovData Handshk  
20:22:57 kernel: ata2.00: failed command: READ FPDMA QUEUED
20:22:57 kernel: ata2.00: cmd 60/08:08:68:01:00/00:00:00:00:00/40 tag 1 ncq 4096 in
20:22:57 kernel:         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
20:22:57 kernel: ata2.00: status:   DRDY  
20:22:57 kernel: ata2: hard resetting link
20:22:57 kernel: ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
20:22:57 kernel: ata2.00: failed to get NCQ Send/Recv Log Emask 0x1
20:22:57 kernel: ata2.00: failed to get NCQ Send/Recv Log Emask 0x1
20:22:57 kernel: ata2.00: configured for UDMA/133
20:22:57 kernel: ata2.00: device reported invalid CHS sector 0
20:22:57 kernel: ata2: EH complete
20:22:57 kernel: ata2.00: exception Emask 0x0 SAct 0x400000 SErr 0x400001 action 0x6
20:22:57 kernel: ata2.00: irq_stat 0x44000008
20:22:57 kernel: ata2: SError:   RecovData Handshk  
20:22:57 kernel: ata2.00: failed command: READ FPDMA QUEUED
20:22:57 kernel: ata2.00: cmd 60/08:b0:08:03:00/00:00:00:00:00/40 tag 22 ncq 4096 in
20:22:57 kernel:         res 41/84:00:08:03:00/00:00:00:00:00/00 Emask 0x410 (ATA bus error) <F>
20:22:57 kernel: ata2.00: status:   DRDY ERR  
20:22:57 kernel: ata2.00: error:   ICRC ABRT  
20:22:57 kernel: ata2: hard resetting link
20:22:57 kernel: ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
20:22:57 kernel: ata2.00: failed to get NCQ Send/Recv Log Emask 0x1
20:22:57 kernel: ata2.00: failed to get NCQ Send/Recv Log Emask 0x1
20:22:57 kernel: ata2.00: configured for UDMA/133
20:22:57 kernel: ata2: EH complete

• read the first ~1GB off the SSD: ~70MB/s
• rewrite it
• read it again: ~110MB/s

• the firmware upgrade and data fix on the "new" SSD: firmware upgrade almost instantly, no issues at all
• firmware upgrade on the "old" SSD: Failed to upgrade firmware (or some message like that)

• hdparm says: "2min for SECURITY ERASE UNIT"; this actually takes ~40 seconds
• hdparm also says: "8min for ENHANCED SECURITY ERASE UNIT"; this takes only ~5 seconds!

• -v -z : shows me a verbose log of what s done, on stdout. May be removed if command needs to execute in batch mode.
• -%F Mirrored [from host %s [file %s [at %s]]] : This adds an additional header to the pages
• -N %h%p/%n%[id].%t : converts URLs like mymoodle.example.com/mod/page/view.php?id=42 to files saved as /home/myself/websites/mycourse/mymoodle.example.com/mod/page/view42.html
• http://mymoodle.example.com/login/index.php?>postfile:/home/myself/websites/mycourse/hts-post0 http://mymoodle.example.com/course/view.php?id=42 : these are the two pages to be backed-up :
  • http://mymoodle.example.com/login/index.php?>postfile:/home/myself/websites/mycourse/hts-post0 : this performs the login by sending the POST request with login and password
  • http://mymoodle.example.com/course/view.php?id=42 : this is the entry page of the course
• -O /home/myself/websites/mycourse : save to this directory. The mirror will be available at file:///home/myself/websites/mycourse/mymoodle.example.com/index.html
• -*/* : don t follow any links, but the ones explicitely allowed below :
• +/login/index.php* +*/course/view.php* +*/mod/resource/view.php* +*/mod/page/view.php* +*/mod/forum/view.php* +*/mod/forum/discuss.php?d=*[0-9] +*/mod/url/view.php* +*/pluginfile.php/* +*/mod/feedback/view.php* +*/mod/feedback/analysis.php* +*/theme/* : this mirrors much of the course contents in our case : pages, PDF attachments, forum posts, etc. (you ll need to customize this depending on your course contents)
• -*/course/view.php?id=43 : but don t backup other courses the same user participates to

It has to be as fast as possible, so interpreted languages are out. You don't want to micro manage memory, so C is out. You don't want to require programmers to have a degree, so C++ is out. You want fast startup and not depend on a big runtime, so Java is out. [...] (Bram Moolenaar)

Do not call up what you cannot put down.

/*
 * constexpr tells the compiler that a variable or function can be evaluated at
 * compile time.
 *
 * constexpr functions can also be run at run time, if they are called with
 * values not known at compile time.
 *
 * See http://en.cppreference.com/w/cpp/language/constexpr for more nice examples
 *
 * It can be used to avoid using constants in code, and using instead functions
 * for computing hardware bitfields or physical values, without losing in
 * efficiency.
 */
#include <iostream>
using namespace std;
constexpr int factorial(int n)
 
    return n <= 1 ? 1 : (n * factorial(n-1));
 
int main()
 
    cout << "Compile time factorial of 6: " << factorial(6) << endl;
    cout << "Enter a number: ";
    int a;
    cin >> a;
    cout << "Run time factorial of " << a << ": " << factorial(a) << endl;
 

        const char* code = R"--(
          printf("foo\tbar\n");
          return 0;
        )--";

#include <string>
#include <iostream>
#include <unordered_set>
using namespace std;
// std::initializer_list< >
//   will have as its value all the elements inside the curly braces
string join(initializer_list<string> strings)
 
    string res;
    for (auto str: strings)
     
        if (!res.empty())
            res += ", ";
        res += str;
     
    return res;
 
int main()
 
    unordered_set<string> blacklist  ".", "..", ".git", ".gitignore"  ;
    cout << join(  "antani", "blinda"  ) << endl;
 

        auto i = 3 + 2;
        // See also https://github.com/esseks/monicelli
        vector<string> names  "antani", "blinda", "supercazzola"  ;
        for (auto i = names.cbegin(); i != names.cend(); ++i)
            cout << i;
        template<typename T>
        T frobble(const T& stuff)
         
             // This will work whatever type is returned by stuff.read()
             auto i = stuff.read();
             //  
         

        for (auto i: list_of_stuff)
                cout << i << endl;
        for (auto n:  0,1,2,3,4,5 )
                cout << n << endl;
        // This construct:
        for (auto i: stuff)
        // If stuff is an array, it becomes:
        for (i = stuff, i < stuff + sizeof(stuff) / sizeof(stuff[0]); ++i)
        // If stuff has .begin() and .end() methods it becomes:
        for (i = stuff.begin(); i != stuff.end(); ++i)
        // Otherwise it becomes:
        for (i = begin(stuff); i != end(stuff); ++i)
        // And you can define begin() and end() functions for any type you
        // want, at any time

// JavaScript
var add = function(a, b)   return a + b;  

# Python
add = lambda a, b: a + b

auto add = [](int a, int b)   return a + b;  

// JavaScript
var a = 0;
$.each([1, 2, 3, 4], function(idx, el)   a += el  );

unsigned a = 0;
std::for_each(  1, 2, 3, 4  , [&a](int el)   return a += el;  );

        tuple<int, string, vector<string>> parse_stuff()
         
                return make_tuple(id, name, values);
         
        string name; vector<string> values;
        // std::ignore can be used to throw away a result
        tie(ignore, name, values) = parse_stuff();
        // std::tie can also be used to do other kind of
        // multi-operations besides assignment:
        return tie(a, b, c) < tie(a1, b1, c1);
        // Is the same as:
        if (a != a1) return a < a1;
        if (b != b1) return b < b1;
        return c < c1;

        std::regex re(R"((\w+)\s+(\w+))");
        string s("antani blinda");
        smatch res;
        if (regex_match(s, res, re))
            cout << "OK " << res[1] << " -- " << res[2] << endl;

    unique_ptr<dirent, std::function<void(void*)>> dirbuf((dirent*)malloc(len), free);

string errno_str(int error)
 
    char buf[256];
#if (_POSIX_C_SOURCE >= 200112L   _XOPEN_SOURCE >= 600) && ! _GNU_SOURCE
    strerror_r(errno, buf, 256);
    string res(buf);
#else
    string res(strerror_r(errno, buf, 256));
#endif
    return res;
 
[ [noreturn]] void throw_libc_error(int error)
 
    throw runtime_error(errno_str(error));
 

db.query(R"(
   INSERT INTO table NAMES (id, name, description)
     VALUES (?, ?, ?)
)", 4, "genio", "fantasia, intuizione, decisione, e velocit  di esecuzione");

apt-get install postfix dovecot-imapd

Postfix The two interesting files to configure postfix are /etc/postfix/main.cf and /etc/postfix/master.cf. A commented version of the former exists in /usr/share/postfix/main.cf.dist. Alternatively, there is the ~600k word strong man page postconf(5). The latter file is documented in master(5).

/etc/postfix/main.cf I changed the following in my main.cf

@@ -37,3 +37,9 @@
 mailbox_size_limit = 0
 recipient_delimiter = +
 inet_interfaces = all
+
+home_mailbox = Mail/
+smtpd_recipient_restrictions = permit_mynetworks reject_unauth_destination permit_sasl_authenticated
+smtpd_sasl_type = dovecot
+smtpd_sasl_path = private/auth
+smtp_helo_name = my.reverse.dns.name.com

At this point, also make sure that the parameters smtpd_tls_cert_file and smtpd_tls_key_file point to the right certificate and private key file. So either change these values or replace the content of /etc/ssl/certs/ssl-cert-snakeoil.pem and /etc/ssl/private/ssl-cert-snakeoil.key. The home_mailbox parameter sets the default path for incoming mail. Since there is no leading slash, this puts mail into $HOME/Mail for each user. The trailing slash is important as it specifies qmail-style delivery'' which means maildir. The default of the smtpd_recipient_restrictions parameter is permit_mynetworks reject_unauth_destination so this just adds the permit_sasl_authenticated option. This is necessary to allow users to send email when they successfully verified their login through dovecot. The dovecot login verification is activated through the smtpd_sasl_type and smtpd_sasl_path parameters. I found it necessary to set the smtp_helo_name parameter to the reverse DNS of my server. This was necessary because many other email servers would only accept email from a server with a valid reverse DNS entry. My hosting provider charges USD 7.50 per month to change the default reverse DNS name, so the easy solution is, to instead just adjust the name announced in the SMTP helo.

/etc/postfix/master.cf The file master.cf is used to enable the submission service. The following diff just removes the comment character from the appropriate section.

@@ -13,12 +13,12 @@
 #smtpd     pass  -       -       -       -       -       smtpd
 #dnsblog   unix  -       -       -       -       0       dnsblog
 #tlsproxy  unix  -       -       -       -       0       tlsproxy
-#submission inet n       -       -       -       -       smtpd
-#  -o syslog_name=postfix/submission
-#  -o smtpd_tls_security_level=encrypt
-#  -o smtpd_sasl_auth_enable=yes
-#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
-#  -o milter_macro_daemon_name=ORIGINATING
+submission inet n       -       -       -       -       smtpd
+  -o syslog_name=postfix/submission
+  -o smtpd_tls_security_level=encrypt
+  -o smtpd_sasl_auth_enable=yes
+  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
+  -o milter_macro_daemon_name=ORIGINATING
 #smtps     inet  n       -       -       -       -       smtpd
 #  -o syslog_name=postfix/smtps
 #  -o smtpd_tls_wrappermode=yes

Dovecot Since above configuration changes made postfix store email in a different location and format than the default, dovecot has to be informed about these changes as well. This is done in /etc/dovecot/conf.d/10-mail.conf. The second configuration change enables postfix to authenticate users through dovecot in /etc/dovecot/conf.d/10-master.conf. For SSL one should look into /etc/dovecot/conf.d/10-ssl.conf and either adapt the parameters ssl_cert and ssl_key or store the correct certificate and private key in /etc/dovecot/dovecot.pem and /etc/dovecot/private/dovecot.pem, respectively. The dovecot-core package (which dovecot-imapd depends on) ships tons of documentation. The file /usr/share/doc/dovecot-core/dovecot/documentation.txt.gz gives an overview of what resources are available. The path /usr/share/doc/dovecot-core/dovecot/wiki contains a snapshot of the dovecot wiki at http://wiki2.dovecot.org/. The example configurations seem to be the same files as in /etc/ which are already well commented.

/etc/dovecot/conf.d/10-mail.conf The following diff changes the default email location in /var/mail to a maildir in ~/Mail as configured for postfix above.

@@ -27,7 +27,7 @@
 #
 # <doc/wiki/MailLocation.txt>
 #
-mail_location = mbox:~/mail:INBOX=/var/mail/%u
+mail_location = maildir:~/Mail
 
 # If you need to set multiple mailbox locations or want to change default
 # namespace settings, you can do it by defining namespace sections.

/etc/dovecot/conf.d/10-master.conf And this enables the authentication socket for postfix:

@@ -93,9 +93,11 @@
    
 
   # Postfix smtp-auth
-  #unix_listener /var/spool/postfix/private/auth  
-  #  mode = 0666
-  # 
+  unix_listener /var/spool/postfix/private/auth  
+    mode = 0660
+    user = postfix
+    group = postfix
+   
 
   # Auth process is run as this user.
   #user = $default_internal_user

Aliases Now Email will automatically put into the '~/Mail' directory of the receiver. So a user has to be created for whom one wants to receive mail...

$ adduser josch

...and any aliases for it to be configured in /etc/aliases.

@@ -1,2 +1,4 @@
-# See man 5 aliases for format
-postmaster:    root
+root:       josch
+postmaster: josch
+hostmaster: josch
+webmaster:  josch

After editing /etc/aliases, the command

$ newaliases

has to be run. More can be read in the aliases(5) man page.

Finishing up Everything is done and now postfix and dovecot have to be informed about the changes. There are many ways to do that. Either restart the services, reboot or just do:

$ postfix reload
$ doveadm reload

Have fun!

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• http://shop.gag.com/black-friday.html

• http://shop.gag.com/black-friday/bf-easymega.html
• http://shop.gag.com/black-friday/bf-telemega.html
• http://shop.gag.com/black-friday/bf-telemetrum.html

• http://shop.gag.com/black-friday/micropeak-bundle.html

Server setup The first step is to install znc:

apt-get install znc

Make sure you get the 1.0 series (in jessie or trusty, not wheezy or precise) since it has much better multi-network support. Then, as a non-root user, generate a self-signed TLS certificate for it:

openssl req -x509 -sha256 -newkey rsa:2048 -keyout znc.pem -nodes -out znc.crt -days 365

and make sure you use something like irc.example.com as the subject name, that is the URL you will be connecting to from your IRC client. Then install the certificate in the right place:

mkdir ~/.znc
mv znc.pem ~/.znc/
cat znc.crt >> ~/.znc/znc.pem

Once that's done, you're ready to create a config file for znc using the znc --makeconf command, again as the same non-root user:

• create separate znc users if you have separate nicks on different networks
• use your nickserv password as the server password for each network
• enable ssl
• say no to the chansaver and nickserv plugins

Finally, open the IRC port (tcp port 6697 by default) in your firewall:

iptables -A INPUT -p tcp --dport 6697 -j ACCEPT

Client setup (irssi) On the client side, the official documentation covers a number of IRC clients, but the irssi page was quite sparse. Here's what I used for the two networks I connect to (irc.oftc.net and irc.mozilla.org):

servers = (
   
    address = "irc.example.com";
    chatnet = "OFTC";
    password = "fmarier/oftc:Passw0rd1!";
    port = "6697";
    use_ssl = "yes";
    ssl_verify = "yes";
    ssl_cafile = "~/.irssi/certs/znc.crt";
   ,
   
    address = "irc.example.com";
    chatnet = "Mozilla";
    password = "francois/mozilla:Passw0rd1!";
    port = "6697";
    use_ssl = "yes";
    ssl_verify = "yes";
    ssl_cafile = "~/.irssi/certs/znc.crt";
   
);

Of course, you'll need to copy your znc.crt file from the server into ~/.irssi/certs/znc.crt. Make sure that you're no longer authenticating with the nickserv from within irssi. That's znc's job now.

Wrapper scripts So far, this is a pretty standard znc+irssi setup. What makes it work with my workflow is the wrapper script I wrote to enable znc before starting irssi and then prompt to turn it off after exiting:

#!/bin/bash
ssh irc.example.com "pgrep znc   znc"
irssi
read -p "Terminate the bouncer? [y/N] " -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]
then
  ssh irc.example.com killall -sSIGINT znc
fi

Now, instead of typing irssi to start my IRC client, I use irc. If I'm exiting irssi before commuting or because I need to reboot for a kernel update, I keep the bouncer running. At the end of the day, I say yes to killing the bouncer. That way, I don't have a backlog to go through when I wake up the next day.

#!/usr/bin/python3
import http.server
import cgi
import socketserver
import hashlib
import json
PORT = 8081
class Handler(http.server.SimpleHTTPRequestHandler):
    def do_POST(self):
        info =  
            "method": "POST",
            "headers":   k: v for k, v in self.headers.items()  ,
         
        # From https://snipt.net/raw/f8ef141069c3e7ac7e0134c6b58c25bf/?nice
        form = cgi.FieldStorage(
            fp=self.rfile,
            headers=self.headers,
            environ= 'REQUEST_METHOD':'POST',
                     'CONTENT_TYPE':self.headers['Content-Type'],
                      )
        postdata =  
        for k in form.keys():
            if form[k].file:
                buf = form.getvalue(k)
                postdata[k] =  
                    "type": "file",
                    "name": form[k].filename,
                    "size": len(buf),
                    # json.dumps will not serialize a byte() object, so we
                    # return the shasum instead of the file body
                    "sha256": hashlib.sha256(buf).hexdigest(),
                 
            else:
                vals = form.getlist(k)
                if len(vals) == 1:
                    postdata[k] =  
                        "type": "field",
                        "val": vals[0],
                     
                else:
                    postdata[k] =  
                        "type": "multifield",
                        "vals": vals,
                     
        info["postdata"] = postdata
        resbody = json.dumps(info, indent=1)
        print(resbody)
        resbody = resbody.encode("utf-8")
        self.send_response(200)
        self.send_header("Content-type", "application/json")
        self.send_header("Content-Length", str(len(resbody)))
        self.end_headers()
        self.wfile.write(resbody)
class TCPServer(socketserver.TCPServer):
    # Allow to restart the mock server without needing to wait for the socket
    # to end TIME_WAIT: we only listen locally, and we may restart often in
    # some workflows
    allow_reuse_address = True
httpd = TCPServer(("", PORT), Handler)
print("serving at port", PORT)
httpd.serve_forever()