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Database Development

Writing Binary File on Disk using ( Large Object ) in Postgresql

I am currently working on my local Lab (ManageEngine 12) Lab, which has a SQL injection vulnerability, I am using a Postgresql as a databases engine. The attack process as follow Create a DLL file that will contain our malicious code Inject a query that creates a large object from an arbitrary remote file on […]

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Linux Mastering Development Ubuntu

undefined reference to `log@GLIBC_2.29′ collect2: error: ld returned 1 exit status

cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 DISTRIB_CODENAME=bionic DISTRIB_DESCRIPTION=”Ubuntu 18.04.4 LTS” aarch64-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=aarch64-linux-gnu-gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/aarch64-linux-gnu/7/lto-wrapper Target: aarch64-linux-gnu Configured with: ../src/configure -v –with-pkgversion=’Ubuntu/Linaro 7.5.0-3ubuntu1~18.04′ –with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs –enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ –prefix=/usr –with-gcc-major-version-only –program-suffix=-7 –enable-shared –enable-linker-build-id –libexecdir=/usr/lib –without-included-gettext –enable-threads=posix –libdir=/usr/lib –enable-nls –with-sysroot=/ –enable-clocale=gnu –enable-libstdcxx-debug –enable-libstdcxx-time=yes –with-default-libstdcxx-abi=new –enable-gnu-unique-object –disable-libquadmath –disable-libquadmath-support –enable-plugin –enable-default-pie –with-system-zlib –enable-multiarch –enable-fix-cortex-a53-843419 –disable-werror –enable-checking=release –build=x86_64-linux-gnu –host=x86_64-linux-gnu –target=aarch64-linux-gnu –program-prefix=aarch64-linux-gnu- –includedir=/usr/aarch64-linux-gnu/include […]

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Mastering Development

No data is being loaded when reading tfrecord files

I am trying to train the model defined here using the function train defined in the same script. I have attempted to use a tf record file provided by the authors in this link (to do that, the only modifications that I made were changing init_path=None and writing the path to the tfrecord file in […]

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Ask Engineering

Error while implemeting D_FF from JK_FF in Verilog

I’m designing a D_FF from JK_FF. The circuit I’m implementing is , as shown in the figure :- Verilog Module Code :- `timescale 1ns / 1ps /* Conversion of a JK Flip Flop to a D Flip Flop Connections are “J = D” and “K = ~D” */ module d_ff_from_jk_ff (q,qbar,rst,clk,d); output reg q; output […]

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Mastering Development Software

Is there a pattern for choosing one of a set of options at random when their selection criteria are equal?

I want to choose between several options, and if the criteria I’m using for selection happen to be equal, I want one at random (reasonably so, so it’s equal-chance each time, rather than arbitrary). This is easily done with nested ifs, but it gets pretty ugly and ends up duplicating code. A simplified example case, […]

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Database Development

Postgresql: Write Binary File on Disk using ( Large Object )

I am trying to write a binary file (dll) to a disk using postgresql (large objects) first I encoded the dll file using base64 cat file.dll | base64 -w 0 TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAA…… Then I used python code to automate the process, since the large object take only 2048 byte on each page ( first page with […]

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CMS Magento Mastering Development

Magento 2.3.4. This JavaScript error “Uncaught TypeError: Cannot set property ‘status’ of undefined” appears only on the configurable products

This error originates from the line data[l].status = 1,. Could you please someone point out what is wrong with this line? t(n).on(“load”, function() { **data[l].status = 1,** t(r).on(“load”, function() { (r.width > u.width() || r.height > u.height()) && (showWrapper = !0, f(v, d), data[l].status = 2, r.width > r.height ? data[l].zoom = r.width / u.width() […]

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Mastering Development

Notice: wpdb::prepare was called incorrectly

I have created a table in my WordPress database this table is used for people to sign up to events. It has four columns a unique auto incremented id, the id of the event post, the user id and a boolean to see if the user is attending online or in person. On the front […]

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Database Development

MySQL 8 – user variables within expressions is deprecated [UDF calls with lot of parameters]

I have this: SELECT @foo1 := UDF1(0, a, b, c, d) AS Foo1, @foo2 := UDF1(1, a, b, c, d) AS Foo2, @foo3 := UDF1(2, a, b, c, d) AS Foo3, @foo4 := UDF1(3, a, b, c, d) AS Foo4, @foo5 := UDF2( @foo1, @foo2, @foo3, @foo4) AS Foo5, @foo6 := UDF3( @foo1, @foo2, @foo3, […]

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Mastering Development

Recursive tree search stops too early

I’m fairly new both to Python and Recursion, so I might have failed to find some relevant question but I haven’t seen this exact one. I have a task to find children count for each name in the following list: parents = [‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘G’, ‘V’, ‘W’, ‘X’, ‘Y’, ‘Z’] I […]