Problem DescriptionIf you write a program under Linux, sometimes run the program when the program crashes, such as only "segmentation fault (core dumped)", the program is relatively small, you can also view a line, but if the program is very large, a row of queries, the effi
How C # Determines if the specified file is being used by another programCause: The project found that when manipulating files, the system often throws an exception, indicating that the file is being consumed by other programs.requirements: in order to determine whether the specified file is being used by another program
Presumably you have encountered the Linux program abnormal exit problem, abnormal exit seems to have a magical magic, will make your nerves suddenly tense. Don't be afraid, Linux is very powerful, when the program exits, will be in the directory where the executable file generated a core file, it is good to record some
string pwd = pwd1+pwd2 # final generated random password f.write (pwd+ \n " #将密码写入文件中 f.close ()
Build Result:M0h[6uzoK2m~9i (+P9g/#o5u ") [email protected]E6f;hvlD7b>[email protected] $Y 6Summarize:1.Pwdran = random.sample (allstr, Pwdlen-4) #除去4个字符外, randomly remove the remaining required characters from the character setRandom.sample () generates a list that needs to be converted to a string, before it can be stitched together with the first part of the generated passw
Create a new database properties file Datasource.propertiesCreate a new test classImport Java.io.InputStream;Import java.sql.Connection;Import Java.sql.DriverManager;Import java.sql.PreparedStatement;Import Java.sql.ResultSet;Import java.util.ArrayList;Import java.util.List;Import java.util.Properties;public class Datatest {private static String FileName = "Datasource.properties";public static void Main (string[] args) {Properties prop = new propertie
Always want to write some small programs in the script language, always written in HTML format, can be opened every time security prompts, today suddenly found that if you save the file in the HTA format, the effect is very different.
Hey..
HTA is the abbreviation of HTML Application (HTML application), is a new concept of software development, directly to save the HTML into the HTA format, is an independent application software, and VB, C + + and o
The first problem: calling external programs in C + +When writing a program, you will inevitably encounter the need to call an external program or someone else to write the executable file, when the programming tool for C + +, by using the system () function, or the Exec family function can be implemented to the external executable
how to implement them in these two compilers. please familiarize yourself with the methods used in other compilers.
Well, let's get started! :)
First, the map file of the program must be generated. What is a map file? In short, a map file is the unique text representation of the program's global symbols, source files,
In my "Let the program in the collapse of the graceful exit of the CallStack" provides a method of CallStack when the program crashes. But to get callstack, there must be support for PDB files. However, under normal circumstances, the published program is release version number, will not be accompanied by PDB files. So how can we find the exact location of the er
program in the default destination path, first thought to use constant #define ...Second, to ensure that the current destination path is not accessed by other illegal channels, it should be stored with a static character array.The next step is to provide a function as an interface (where the term "interface" is not known to fit) to obtain the current Get_backup_topath of the destination path in use.There is also a need to implement the previously imp
(1) function prototype:
Uint win exec (maid, uint ucmdshow );
(2) parameters:
Lpcmdline: point to an empty ending string that contains the application to be executed.
Program Command Line (file name with optional parameters ).
Ucmdshow: defines how Windows application windows are displayed, and provides the value of the wshowwindow member of startupinfo for the CreateProcess function.
(3) return value:
Objective:We all know that Java can package binaries into executable jar files, double-click the jar and double-click the EXE effect is the same, but the feeling is still different. In fact, the Java program is packaged as EXE also requires this executable jar file.Get ready:Eclipse, exe4j (online with software and account download)The first step is to package the Java project into an executable jar file, f
In my article "Let the program in the collapse of a decent exit callstack" provides a way to get callstack when a program crashes. But to get callstack, you must have the support of a PDB file. In general, however, the programs that are released are release versions, and no PDB files are included. So how can we find the exact location of the error when the
If the exe or dll has not been specially processed, crack it. net program is actually very simple, but you need to have enough patience. next we will introduce the method of cracking. interested friends can understand it and maybe learn from you. net is helpful. I just want to make a simple example and give you some ideas ~~~~
1. tools used
Reflector.exe is used to view. net code. this is needless to say. net is a necessary learning tool.
Ildasm.exe:
Double-click a txt file to open it in notepad, because the txt file is associated with the Notepad program.
If you want to customize the file type, you can directly call your program and open it by double-clicking it? OK. First, we can find the first issue and see the follow
In my "Let the program exit in a decent way when the program crashes" callstack provides a way to get callstack when the program crashes. But to get callstack, you must have support for PDB files. However, in general, all released programs are in the release version and do not include PDB files. So how can we find the specific error location when the
Second, the directory operation
The first is a function read from the directory, Opendir (), Readdir (), Closedir (), which is used to open the file handle first and then iterate over the following list:
The code is as follows
Copy Code
$base _dir = "filelist/";$fso = Opendir ($base _dir);echo $base _dir. " while ($flist =readdir ($FSO)) {echo $flist. " }Closedir ($FSO)?>
This is a
Source code such as the following:#include #include intMainintARGC, Char*ARGV[]){if(ARGC! =3){printf("%s , argv[0]);return-1; } Char*passwd=Crypt(argv[1],argv[2]);printf("passwd: %s\ n", passwd);return 0;}Summarize:char *crypt (const char *key , const char *salt); Crypt is a password cryptographic function, which is based on the Data Encryption Standard (DES) algorithm. Crypt is only applicable to the use of password and is not suitable for data encryption. crypt()将參数key所指的字符串加以加密。key字符串长
started with the creation of VUE projects and did not find out how to open a project.Vaguely feel is the installation of the problem, finally see: 79203698 the method of the great God, after trying, hey, 8080 opened ~ ~ ~My steps:1. I did not find Node_modules "folder, so directly under the project directory: NPM install;2. NPM run build;3. NPM Run Dev successfully waits a few seconds to automatically open the localhost:8080In addition: a long time ago the installation of node is required to up
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