ftok function

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Ftok () function Introduction

When the system establishes IPC communication (such as message queue and shared memory), an ID value must be specified.. Generally, this ID value is obtained through the ftok function..The ftok prototype is as follows:Key_t ftok (char * fname, int

Linux Ftok () function--shared memory of multi-process IPC

An ID value must be specified when the system establishes an IPC communication (such as Message Queuing, shared memory). Typically, this ID value is obtained through the Ftok function.The Ftok prototype is as follows:key_t Ftok (char * fname, int id)

Use of the Ftok () function

In the previous article,Mayuyu described the principle of shared memory and how to use it. Before you create shared memory, you must specify an ID value, which is usually obtained by the Ftok () function that is now spoken. The ftok () function is

Linux environment Programming-ftok () function detailed

The system must specify an ID value when it establishes an IPC communication, such as Message Queuing, shared memory. Typically, the ID value is obtained through the Ftok function. The Ftok prototype is as follows: key_t Ftok (char * fname, int id)

Linux ftok () function

An ID value must be specified for the system to establish IPC communication (such as message queue and shared memory. Generally, this ID value is obtained through the ftok function. The ftok prototype is as follows: Key_t ftok (char * fname, int ID)

Ftok () function

  An ID value must be specified for the system to establish IPC communication (such as message queue and shared memory. Generally, this ID value is obtained through the ftok function.The ftok prototype is as follows:Key_t ftok (char * fname, int

Linux Ftok () function

Function prototypeskey_t Ftok (const char *pathname, int proj_id); #pathname: Specifies the file name, the file must be present and can be accessed #proj_id: sub-sequence number, only 8 bits are used (0-255) #当成功执行时, Returns a key_t value that fails

Shell script implements Ftok function _linux Shell

"The old Sys IPC still has several useful uses." Three types of IPC objects are shared memory, semaphores, and messages. "When you use these objects to IPC, you need to create a Key for each object." While it is theoretically possible to use any of

How function Ftok in Linux produces key values

When we do the Linux interprocess communication development, we often use the Ftok function to produce the unique key value of the text, then how this key value is generated.Function prototype:key_t ftok (const char * fname, int id); Application:key_

Use of the Ftok function

Ftok function definition: An ID value must be specified when the system establishes an IPC communication (Message queue, semaphore, and shared memory). Typically, this ID value is obtained through the Ftok function.Header file # include #include

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