ftok

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

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)

  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

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)

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)

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

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

"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

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_

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

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

1. key_t ftok (char * fname, int ID) name of the file specified by fname (an existing file name ), the current directory is generally used. id is the subsequence number. UNIX in implementation, the file index node number ( ls-I ,

# Include # Include As follows: Key_t ftok (char * fname, int ID) Fname is the specified file name (an existing file name). The current directory is generally used, for example: Key_t key; Key = ftok (".", 1); in this way, the fname is set

Ftok minor issues-general Linux technology-Linux technology and application information. The following is a detailed description. # Include # Include # Include # Include Int main () {Key_t key; Char I; For (

Original article: http://davidlu1001.blogbus.com/logs/85182548.html Shared memory allows multiple processes to access the same memory space. It is the fastest available IPC format. It is designed to reduce the running efficiency of other

The so-called shared memory is the fastest available IPC form that allows multiple processes to access the same piece of memory space. is designed for inefficient operation of other communication mechanisms. It is often used in conjunction with

Shared memory allows multiple processes to access the same memory space. It is the fastest available IPC format. It is designed to reduce the running efficiency of other communication mechanisms. It is often used in conjunction with other

The so-called shared memory is the fastest available IPC form that allows multiple processes to access the same piece of memory space. is designed for inefficient operation of other communication mechanisms. It is often used in conjunction with

The so-called shared memory is the fastest available IPC form that allows multiple processes to access the same piece of memory space. is designed for inefficient operation of other communication mechanisms. It is often used in conjunction with

System v ipc:This must be understood first, because many books or materials directly say that IPC is a shared memory, message queue, and signal set. In factIPC is a mechanism that provides a channel for inter-process communication. Why does it add