exec function

JS's function throttling and throttle and debounce detailed:Also realizes a function, may have the high efficiency, some efficiency is low, this phenomenon in the high energy dissipation execution process distinguishes is more obvious.A more common

Examples of common JavaScript regular functions and javascript examples This example describes common regular functions in JavaScript. We will share this with you for your reference. The details are as follows: Use JavaScript regular functions such

Let's take a look at how to use the exec function.Exec ()Prototype: The code is as follows:Copy code String exec (string command [, string array [, int return_var]) The exec () function is similar to system (). It also executes the given

The whole idea1, Server Installation FFmpeg2, Use the FFMPEG-I directive to convert AMR to MP3 format (this will be written in PHP code, using the EXEC function can be executed)3. Use the HTML5 audio tag to play the MP3 file on the web sideHere are

Vfork is used to create a new process, which aims to exec a new program. Both vfork and fork create child processes, but vfork does not completely copy the address space of the parent process to the child process, because the child process will call

Built-in methods:1:abs (): Take absolute value2:all (): The result is true when all the objects in the iterator are true. All ([+])3:any (): True if any of the data in an iterative object is a true result. Any ([0,1,2])4:ascii (): Prints an object

Stack frame: The stack is a space that the C language program must run with a record call path and parametersThe function calls the framework, passes parameters, saves the return address, and provides local variable space.The relationship between

Creation of executable filesHttp://www.cnblogs.com/web21/p/6201735.htmlTotal: An executable file (the Linux elf format file) is implemented by how it is added from an elf format file to a processIn a Linux system, a process can be created through

(i): concept of the processThe thread is the object that is active in the process. Each thread has a separate program counter, a process stack, and a set of process registers. The kernel dispatches a thread rather than a process. In Linux, the

A change user i d and Group I DYou can set the actual user ID and valid user ID with the setuid function. Similarly, you can set the actual group ID and valid group ID with the Setgid function.int Setgid (gid_t gid);Two function returns: 0 if

The core concept in the operating system is the process: This is an abstraction of the running program.A process is a type of activity that has programs, inputs, outputs, and states. A single processor can be shared by a number of processes, and it

The File descriptors is an integer table memory-managed object that can be read and written by the process.A process can get the file descriptors by opening the files directory or device by creating a pipelineor copy an already existing

Execution mechanism of applications on LinuxHow the execution file is "executed" in the shell. In this article, as little as possible to use some source code, lest tooChat, mainly to clarify the process, interested students can go to see the

python2.x and 3??. X version Difference3??. of Python Version 0, often referred to as Python 3000, or simply py3k. This is a large upgrade relative to earlier versions of Python.In order not to take in too much of a burden, Python 3.0 did not

First, get the ID#include #include pid_t getpid (void) Get this process IDpid_t getppid (void) Gets the parent process IDParent process: A new process is created in the existing process.Example: GETPID.C#include #include #include int main (){printf (

In order not to take in too much of a burden, Python 3.0 did not consider downward compatibility when designing. As a result, many programs designed for early Python versions cannot perform properly on Python 3.0. To take care of the existing

first,the main function.The main function is prototyped as follows. ARGC is the number of command-line arguments, and argv is an array of pointers to parameters.int Main (intchar *argv[])When the kernel executes a C program (using an EXEC function),

What is a system call? The Linux kernel contains a set of functions for implementing various system functions, called system calls. Users can invoke system calls in the application to implement some system functionality. From a certain point of view,

3??. of Python Version 0, often referred to as Python 3000, or simply py3k. This is a large upgrade relative to earlier versions of Python.In order not to take in too much of a burden, Python 3.0 did not consider downward compatibility when

ObjectiveKeep learning attitude, learning a dynamic language is actually a long time to be ready to do things, was still tangled in Python and Ruby. Now not just to learn python, but also to think about what to do with it, these follow-up, because