Reprint: Linux under C Programming Common header file

Header file home directory include

There are a total of 32. h header files in the header file directory. There are 13 in the main directory, 4 in the ASM subdirectory, 10 in the Linux subdirectory, and 5 in the SYS subdirectory. The respective functions of these header files are as follows, the specific functions and the information contained in the 14th chapter.

<a.out.h>:a.out header file that defines the a.out execution file format and some macros.
&LT;CONST.H&GT;: constant symbol header file, currently only defines the flag bits of the I_mode field in the I node.
<ctype.h>: A character type header file that defines some macros about character type judgments and conversions.
<errno.h>: Error xwould file containing various error numbers in the system. (Linus introduced from the Minix).
<fcntl.h>: The file control header file, which is used for the operation of the file and its descriptor to control the definition of the constant symbol.
<signal.h>: Signal header file, define signal symbol constants, signal structure and signal operation function prototype.
&LT;STDARG.H&GT;: A standard parameter header file that defines a variable parameter list as a macro. The main description is a type (va_list) and 3 macros (Va_start, Va_arg, and Va_end) for vsprintf, vprintf, vfprintf functions.
&LT;STDDEF.H&GT;: standard definition header file, defines null, Offsetof (TYPE, MEMBER).
<string.h>: string header file that defines some embedded functions for string manipulation.
&LT;TERMIOS.H&GT;: terminal input and Output function header file, mainly defines the terminal interface to control the asynchronous communication port.
<time.h>: The time type header file, mainly defines the TM structure and some time-related function prototype.
<unistd.h>:linux a standard header file that defines various symbol constants and types, and declares various functions. For example, __library__ is defined, and the system call number and inline assembler _syscall0 () are included.
<utime.h>: User Time header file, defines the access and modification time structure, and the Utime () prototype.

(1) Architecture related header file subdirectory include/asm

These header files primarily define data structures, macro functions, and variables that are closely related to the CPU architecture. A total of 4 files.

A <ASM/IO.H>:I/O header file that defines functions for I/O port operations in the form of an embedded assembler of macros.
<asm/memory.h>: Memory copy header file containing memcpy () embedded assembly macro function.
<asm/segment.h>: Segment operation header file, defines the embedded assembler function for the segment register operation.
<asm/system.h>: System header file, which defines the embedded assembly macros for setting or modifying descriptors/break gates, etc.

(2) Linux kernel dedicated header file subdirectory Include/linux

<linux/config.h>: Kernel configuration header file, define keyboard language and hard disk type (Hd_type) options.
<linux/fdreg.h>: Floppy drive header file containing some definitions of the floppy disk controller parameters.
<linux/fs.h>: File system header file, definition file table structure (File,buffer_head,m_inode, etc.).
<LINUX/HDREG.H>: Hard disk parameter header file, which defines information such as access to the hard disk register port, status code, and partition table.
The <linux/head.h>:head header file defines the simple structure of the segment descriptor, and several selection constants.
<linux/kernel.h>: Kernel header file, contains some of the kernel common functions of the prototype definition.
<LINUX/MM.H>: Memory management header file containing page size definitions and some page release function prototypes.
<linux/sched.h>: Scheduler header file that defines the data for the task structure task_struct, initial task 0,
As well as some embedded assembler function macro statements about descriptor parameter setting and getting.
<LINUX/SYS.H>: The system calls the header file, which contains 72 system calls to the C function handler, beginning with "Sys_".
The <linux/tty.h>:tty header file defines the parameters and constants for Tty_io, serial communication.

(3) System-specific data structure subdirectory Include/sys

<sys/stat.h>: File status header file, containing file or file system state structure stat{} and constants.
<SYS/TIMES.H>: Defines a process run time structure TMS and The Times () function prototype.
<sys/types.h>: A type header file that defines the basic system data type.
<sys/utsname.h>: System name Structure header file.
<sys/wait.h>: Wait for the calling header file to define the system call Wait () and Waitpid () and the associated constant symbol.

Linux Common header files are as follows:

POSIX standard-Defined header file

<dirent.h> Catalog Items

<fcntl.h> File Control

<fnmatch.h> file name Match type

<glob.h> path name pattern match type

<grp.h> Group files

<netdb.h> Network Database Operations

<pwd.h> Password file

<regex.h> Regular Expressions

<tar.h> Tar archive values

<termios.h> Terminal I/O

<unistd.h> Symbolic constants

<utime.h> file time

<wordexp.h> character Extension types

-------------------------

<arpa/inet.h> Internet definition

<net/if.h> Socket Local Interface

<netinet/in.h> Internet Address Family

<netinet/tcp.h> Transmission Control Protocol Definition

-------------------------

<sys/mman.h> Memory Management Statement

<sys/select.h> Select function

<sys/socket.h> Socket Excuses

<sys/stat.h> file Status

<sys/times.h> Process Time

<sys/types.h> Basic System data types

<sys/un.h> UNIX domain sockets definition

<sys/utsname.h> system Name

<sys/wait.h> Process Control

------------------------------

POSIX-defined xsi extension header file

<cpio.h> Cpio Archive values

<dlfcn.h> Dynamic Links

<fmtmsg.h> Message Display structure

<ftw.h> File Tree Roaming

<iconv.h> code set conversion using programs

<langinfo.h> Language Information Constants

<libgen.h> Pattern matching function definition

<monetary.h> Currency Types

<ndbm.h> Database Operations

<nl_types.h> Message Categories

<poll.h> Polling functions

<search.h> search Form

<strings.h> string manipulation

<syslog.h> System error log records

<ucontext.h> User Context

<ulimit.h> User Restrictions

<utmpx.h> User Account Database

-----------------------------

<sys/ipc.h> IPC (Named pipes)

<sys/msg.h> Message Queuing

<sys/resource.h> Resource Operations

<sys/sem.h> Signal Volume

<sys/shm.h> shared storage

<sys/statvfs.h> File System Information

<sys/time.h> Time Type

<sys/timeb.h> additional date and time definitions

<sys/uio.h> vector I/O operations

------------------------------

POSIX-defined optional header file

<aio.h> Asynchronous I/O

<mqueue.h> Message Queuing

<pthread.h> Threads

<sched.h> Execution Scheduling

<semaphore.h> Signal Volume

<spawn.h> real-time Spawn interface

<stropts.h> XSI Streams interface

<trace.h> Event Tracking

3. List of header files

C

#i nclude <assert.h>//Set insertion point

#i nclude <ctype.h>//character processing

#i nclude <errno.h>//Definition error code

#i nclude <float.h>//floating point processing

#i nclude <iso646.h>//macros corresponding to various operators

#i nclude <limits.h>//define constants for the most values of various data types

#i nclude <locale.h>//define localization C functions

#i nclude <math.h>//Defining mathematical functions

#i nclude <setjmp.h>//exception handling support

#i nclude <signal.h>//signaling mechanism support

#i nclude <stdarg.h>//indefinite parameter list support

#i nclude <stddef.h>//Common constants

#i nclude <stdio.h>//defining input/Output functions

#i nclude <stdlib.h>//define miscellaneous functions and memory allocation functions

#i nclude <string.h>//String processing

#i nclude <time.h>//define functions on time

#i nclude <wchar.h>//wide character processing and input/output

#i nclude <wctype.h>//Wide character classification

Traditional C + +

#i nclude <fstream.h>//Switch to <fstream>

#i nclude <iomanip.h>//Switch to <iomainip>

#i nclude <iostream.h>//Switch to <iostream>

#i nclude <strstrea.h>//This class is no longer supported, use the StringStream in <sstream>

————————————————————————————————

Standard C + +

#i nclude <algorithm>//stl General algorithm

#i nclude <bitset>//stl bit set container

#i nclude <cctype>//character processing

#i nclude <cerrno>//Definition error code

#i nclude <cfloat>//floating point processing

#i nclude <ciso646>//macros corresponding to various operators

#i nclude <climits>//define constants for the most values of various data types

#i nclude <clocale>//Defining localization functions

#i nclude <cmath>//Defining mathematical functions

#i nclude <complex>//plural class

#i nclude <csignal>//signaling mechanism support

#i nclude <csetjmp>//exception handling support

#i nclude <cstdarg>//indefinite parameter list support

#i nclude <cstddef>//Common constants

#i nclude <cstdio>//defining input/Output functions

#i nclude <cstdlib>//define miscellaneous functions and memory allocation functions

#i nclude <cstring>//String processing

#i nclude <ctime>//define functions on time

#i nclude <cwchar>//wide character processing and input/output

#i nclude <cwctype>//Wide character classification

#i nclude <deque>//stl Dual-ended queue container

#i nclude <exception>//Exception handling class

#i nclude <fstream>//File input/output

#i nclude <al>//stl defining an arithmetic function (instead of an operator)

#i nclude <limits>//define a variety of data type value constants

#i nclude <list>//stl Linear list container

#i nclude <locale>//Localization specific information

#i nclude <map>//stl mapping container

#i nclude <memory>//stl memory allocation via allocator

#i nclude <new>//Dynamic memory allocation

#i nclude <numeric>//stl commonly used digital operations

#i nclude <iomanip>/parametric input/output

#i nclude <ios>//Basic input/output support

#i nclude <iosfwd>//input/output system usage pre-declaration

#i nclude <iostream>//data stream input/output

#i nclude <istream>//Basic input stream

#i nclude <iterator>//stl iterators

#i nclude <ostream>//Basic output stream

#i nclude <queue>//stl queue container

#i nclude <set>//stl Collection Container

#i nclude <sstream>//string-based streaming

#i nclude <stack>//stl stack container

#i nclude <stdexcept>//Standard Exception class

#i nclude <streambuf>//Bottom input/output support

#i nclude <string>//String class

#i nclude <typeinfo>//run-time type information

#i nclude <utility>//stl Generic template class

#i nclude <valarray>//operations on arrays that contain values

#i nclude <vector>//stl dynamic Array container

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C99 Added Parts

#i nclude <complex.h>//Complex processing

#i nclude <fenv.h>//floating point environment

#i nclude <inttypes.h>//integer format conversion

#i nclude <stdbool.h>//Boolean environment

#i nclude <stdint.h>//Integral environment

#i nclude <tgmath.h>//general type Math macro

Reprint: Linux under C Programming Common header file