Linux call list

The following is a list of Linux system calls, including most common system calls and functions derived from system calls. This may be the only Linux system call list with Chinese notes that you can see on the Internet. Even a simple list of English letters in alphabetical order, it is rare to achieve this completely.

By convention, this list is based on man pages section 2nd, that is, the system call section. According to my understanding, I made a rough classification and made some small changes. I deleted a few system calls that are only used by the kernel and are not allowed to be called by users, I have made some minor changes to some areas that I may find inappropriate, and attached a brief comment to all listed system calls.

Some functions have the same effect, but the parameters are different. (Many people who are familiar with C ++ can immediately think of function overloading, but do not forget that the Linux core is written in C language, so they can only get different function names ). Some other functions are outdated and replaced by new and better functions (GCC issues a warning when linking these functions), but they are retained for compatibility reasons, for these functions, I will mark "*" as a difference.

I. Process Control:

Fork	Create a new process
Clone	Create a sub-process based on specified conditions
Execve	Run executable files
Exit	Abort a process
_ Exit	Stop the current process immediately
Getdtablesize	Maximum number of files that a process can open
Getpgid	Obtains the ID of a specified process group.
Setpgid	Set the flag number of the specified process group
Getpgrp	Get the ID of the current process group
Setpgrp	Set the flag number of the current process group
Getpid	Get process ID
Getppid	Obtain the parent process ID
Getpriority	Get scheduling priority
Setpriority	Set scheduling priority
Modify_ldt	Local description table of the read/write process
Nanosleep	Specifies the time for the process to sleep.
Nice	Change the priority of a time-based process
Pause	Pending process and waiting for Signal
Personality	Set the process running domain
Prctl	Perform specific operations on processes
Ptrace	Process Tracking
Sched_get_priority_max	Obtain the maximum static priority
Sched_get_priority_min	Get the lower limit of Static Priority
Sched_getparam	Obtain the scheduling parameters of a process.
Sched_getscheduler	Obtains the scheduling policy of a specified process.
Sched_rr_get_interval	Obtain by rrAlgorithmThe time slice length of the Scheduled real-time process
Sched_setparam	Set process scheduling Parameters
Sched_setscheduler	Set Scheduling Policies and parameters for a specified process
Sched_yield	The process takes the initiative to let out the processor and waits for itself to wait for the end of the scheduling queue
Vfork	Create a sub-process for executionProgram, Usually used together with execve
Wait	Wait for the sub-process to terminate
Wait3	See wait
Waitpid	Wait for the specified sub-process to terminate
Wait4	See waitpid
Capget	Obtain process Permissions
Capset	Set process Permissions
Getsid	Get meeting ID number
Setsid	Set meeting ID

 

Ii. File System Control

1. file read/write operations

Fcntl	File Control
Open	Open a file
Creat	Create a new file
Close	Close file description
Read	Read files
Write	Write files
Readv	Read data from a file into a buffer Array
Writev	Write Data in the buffer array to a file
Pread	Random File Read
Pwrite	Random file write
Lseek	Move file pointer
_ Llseek	Move the file pointer in a 64-bit address space
DUP	Copy the description of an opened file
Dup2	Copy the file description according to the specified conditions
Flock	Add/unlock files
Poll	I/O multiplexing
Truncate	File Truncation
Ftruncate	See truncate
Umask	Set the File Permission mask
Fsync	Write the part of the file in the memory back to the disk.

2. File System Operations

Access	Determine File accessibility
Chdir	Change current working directory
Fchdir	See chdir
Chmod	Change file Mode
Fchmod	See chmod
Chown	Change the owner or user group of a file
Fchown	See chown
Lchown	See chown
Chroot	Change root directory
Stat	Retrieve File status information
Lstat	See stat
Fstat	See stat
Statfs	Retrieve File System Information
Fstatfs	See statfs
Readdir	Read directory items
Getdents	Read directory items
Mkdir	Create directory
Mknod	Create an index Node
Rmdir	Delete directory
Rename	File rename
Link	Create Link
Symlink	Create a symbolic link
Unlink	Delete Link
Readlink	Value of the read Symbolic Link
Mount	Install a File System
Umount	Detach a File System
Ustat	Retrieve File System Information
Utime	Change the file access modification time
Utimes	See utime
Quotactl	Disk Quota Control

 

Iii. System Control

IOCTL	I/O total control functions
_ Sysctl	Read/write System Parameters
Acct	Enable or disable process accounting
Getrlimit	Obtain the upper limit of system resources
Setrlimit	Set system resource limit
Getrusage	Obtain system resource usage
Uselib	Select the binary function library to use
Ioperm	Set port I/O Permissions
Iopl	Change process I/O permission level
Outb	Low-level port operations
Reboot	Restart
Swapon	Open swap files and devices
Swapoff	Disable swap files and devices
Bdflush	Control the bdflush daemon
Sysfs	Obtain the file system types supported by the core
Sysinfo	Obtain system information
Adjtimex	Adjust system clock
Alarm	Set an alarm for a process
Getitimer	Get the timer Value
Setitimer	Set the timer Value
Gettimeofday	Time and time zone
Settimeofday	Set Time and time zone
Stime	Set system date and time
Time	Obtain system time
Times	Process running time
Uname	Obtain the name, version, host, and other information of the current UNIX system.
Vhangup	Suspend current terminal
Nfsservctl	Control the NFS Daemon
Vm86	Enter the simulated 8086 Mode
Create_module	Create module items that can be loaded
Delete_module	Delete module items that can be loaded
Init_module	Initialization module
Query_module	Query module information
* Get_kernel_syms	Obtain the core symbol, which has been replaced by query_module

 

Iv. Memory Management

BRK	Change Data Segment space allocation
Sbrk	See BRK
Mlock	Memory Page locking
Munlock	Memory Page unlock
Mlockall	Call the process to lock all memory pages
Munlockall	Call the process to unlock all memory pages
MMAP	Ing Virtual Memory Page
Munmap	Remove Memory Page ing
Mremap	Remap the virtual memory address
Msync	Write the data in the ing memory back to the disk
Mprotect	Set memory image protection
Getpagesize	Get page size
Sync	Write memory buffer data back to Hard Disk
Cacheflush	Writes the content in the specified buffer to the disk.

 

V. Network Management

Getdomainname	Retrieve Domain Name
Setdomainname	Set Domain Name
Gethostid	Obtain the host ID
Sethostid	Set host ID
Gethostname	Obtain the Host Name
Sethostname	Set Host Name

 

Vi. Socket Control

Socketcall	Socket System Call
Socket	Establish socket
Bind	Bind socket to Port
Connect	Connect to a remote host
Accept	Response to socket connection request
Send	Send messages through socket
Sendto	Send UDP messages
Sendmsg	See send
Recv	Receive information through socket
Recvfrom	Receive UDP Information
Recvmsg	See Recv
Listen	Listen to socket Port
Select	Round Robin of multiple synchronous I/O
Shutdown	Close the connection on the socket
Getsockname	Obtain the local socket name
Getpeername	Obtain the socket name of the contact.
Getsockopt	Port fetch settings
Setsockopt	Set port Parameters
Sendfile	Transmit data between files or ports
Socketpair	Create a pair of connected anonymous sockets

VII. User Management

Getuid	Get user ID
Setuid	Set User ID
Getgid	Get group ID
Setgid	Set Group flag number
Getegid	Get valid group ID
Setegid	Set valid group ID
Geteuid	Get valid user ID
Seteuid	Set valid user ID
Setregid	Set true and valid group ID numbers respectively
Setreuid	Set real and valid user ID numbers respectively
Getresgid	Obtain the true, valid, and saved group ID numbers respectively.
Setresgid	Set true, valid, and saved group ID numbers respectively.
Getresuid	Obtain the real, valid, and saved user ID numbers respectively.
Setresuid	Set real, valid, and saved user ID numbers respectively
Setfsgid	Set the group ID used for file system check
Setfsuid	Set the user ID used for file system check
Getgroups	Retrieve the list of post-completion group flag
Setgroups	Set the post-completion group flag list

 

8. inter-process communication

 

IPC	Inter-process communication control calls

1. Signal

Sigaction	Set the processing method for the specified signal
Sigprocmask	Blocks or unblocks signals in a set of signals based on parameters.
Sigpending	Set a queue for the specified blocked Signal
Sigsuspend	Pending a process to wait for a specific signal
Signal	See Signal
Kill	Send a signal to a process or process group
* Sigblock	Add a signal to the blocked signal mask, which has been replaced by sigprocmask
* Siggetmask	Obtain the existing blocking signal mask, which has been replaced by sigprocmask
* Sigsetmask	Use the given signal mask to replace the existing blocking signal mask, which has been replaced by sigprocmask.
* Sigmask	Converts a given signal to a mask, which has been replaced by sigprocmask.
* Sigpause	Same as sigsuspend, which has been replaced by sigsuspend
Sigvec	Signal processing functions for BSD compatibility, similar to sigaction
Ssetmask	The signal processing function of ansi c, similar to sigaction

2. Messages

Msgctl	Message control operations
Msgget	Get Message Queue
Msgsnd	Send message
Msgrcv	Retrieve message

3. Pipelines

Pipe	Create MPs queue

4. semaphores

Semctl	Semaphore Control
Semget	Obtain a set of semaphores
Semop	Semaphore operation

5. Shared Memory

Shmctl	Control shared memory
Shmget	Get shared memory
Shmat	Connect to shared memory
Shmdt	Remove shared memory

 

References

• Linux man pages

• Advanced Programming in the Unix environment, W. Richard Steven S, 1993

 

From: http://www.ibm.com/developerworks/cn/linux/kernel/syscall/part1/appendix.html