UNIX final exam summary -- for direct Department

Unix Final exam summary – For direct line

Short answer ：
vi Editor Mode ： Input , command , Last line
GCC The composition of ： The preprocessor 、 compiler 、 Assembler 、 The linker
C The process of compiling a program ：
1、 Preprocessing
2、 Compile into assembly code
3、 Assemble into object code
4、 link

The difference between a dynamic library and a static library
make The reason for introducing
makefile The rules of

linux Common document types
With buffer IO And unbuffered IO Differences and their common functions
Why design standards IO library , standard IO Purpose of providing buffer
Three ways of streaming reading and writing ：
1 Read and write one character at a time
2 Read and write one line at a time
3 Read and write any length of content at a time

The way of stream refresh ：
（ Refresh the file stream
Automatically refresh ：
Flow closed fclose;
exit End ;
The line buffer “\n”;
Buffer full ;
）
There are three types of buffers ：
（ block （ whole ） buffer
The line buffer line buffered
No buffer Unbuffered
）

The way the process starts
The way the process terminates
Process classification ： The front desk , backstage , guardian
fork and vfork difference
exit and _exit difference
Two relationships of parent-child process
The solution to the zombie process

wait And waitpid The use and difference of
Writing rules of daemon

Three signal processing methods ：（ Ignore the signal , Perform system default actions , Capture the signal ）
Semaphore message queue shared memory has its own characteristics
Shared memory implementation approach

Three types of sockets and their characteristics
Connection oriented service process 、 Connectionless service process

Refresh ,UPD server,client
The way of stream refresh ：
（ Refresh the file stream
Automatically refresh ：
Flow closed fclose;
exit End ;
The line buffer “\n”;
Buffer full ;
）
There are three types of buffers ：
（ block （ whole ） buffer
The line buffer line buffered
No buffer Unbuffered
）
UDP Scope of application ：（ For datagram
Most of the network data is short message
Have a lot of Client
No special requirements for data security
The burden of the Internet is very heavy , But it requires high response speed
）
server：（ Program initialization
Keep listening to a fixed port
received Client After the connection, establish a socket Connect
And Client Communication and information processing
receive Client adopt socket Connect the data sent , Carry out corresponding processing and return processing results
adopt socket Connect to Client Send a message
Interrupt communication with after communication Client The connection of ）

client effect ：（ Program initialization
Connect to a Server On , establish socket Connect
And Server Communication and information processing
receive Server adopt socket Connect the data sent , Deal with it accordingly
adopt socket Connect to Server Send request information
Interrupt communication with after communication Server The connection of
）

TCP and UDP Programming differences
select Function features

Suppose the process has opened the descriptor 0、1、2
call dup2(1,3),dup The return value is 3,3

Unix Programming study exam

Experiment 1 ：
link : https://download.csdn.net/download/weixin_42139772/15621050.
Experiment two ：
link : https://download.csdn.net/download/weixin_42139772/15621081.
Experiment three ：
link : https://download.csdn.net/download/weixin_42139772/15621095.
Experiment four ：
link : https://download.csdn.net/download/weixin_42139772/15621118.
Experiment five ：
link : https://download.csdn.net/download/weixin_42139772/15621123.
unix Program （ experiment + Example ：
link : https://download.csdn.net/download/weixin_42139772/15621136.
Unix Final exam review in rain class ：
link : https://download.csdn.net/download/weixin_42139772/15621152.