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Method to access file data on a computer
POSIX compliant operating systems, a program that needs to access data from a file stored in a file system uses the read system call. The file is identified
Read_(system_call)
Way for programs to access kernel services
In computing, a system call (syscall) is the programmatic way in which a computer program requests a service from the operating system on which it is executed
System_call
System call in a Unix-like operating system kernel
by assembler code using the C preprocessor. fwrite getchar fprintf read (system call) sync (Unix) http://www.unix.com/man-page/FreeBSD/2/write/ Manual
Write_(system_call)
Topics referred to by the same term
Resources from Wikiversity Read or READ may refer to: Read (computer), to retrieve data from a storage device Read (system call), a low-level IO function
Read
Linux kernel interface for input events
the appearance of the device. Libevdev shares similarities with the read system call. It sits below the process that handles input events, in between the
Evdev
Linux-specific system call
Linux-specific system call that moves data between a file descriptor and a pipe without a round trip to user space. The related system call vmsplice() moves
Splice_(system_call)
Computer program for sharing resources
Dump core request WRITEI Internal form of write system call READI Internal form of read system call RSIGNAL Sendremote signal SYNCTIME Synchronize time
Remote_File_Sharing
Technology for controlling access to file system items
the ability to manipulate file system items. Often the settings allow controlling access based on function such as read, change, navigate, and execute
File-system_permissions
Computer terminal application programming interface
being triggered by the start of the read() system call, or if a single character is received. In other words, read() waits for a maximum specified total
POSIX_terminal_interface
Software that manages computer hardware resources
the other registers onto the call stack. (Alternatively, the contents of the registers may be placed in a system table.) Read the integer from the data bus
Operating_system
Linux kernel interface for storage devices
Computer programming portal Linux portal io_uring is a Linux kernel system call interface for storage device asynchronous I/O operations. It addresses
Io_uring
System calls in some operating systems
In Unix-like operating systems, a program initializes access to a file in a file system using the open system call. This allocates resources associated
Open_(system_call)
Transient computing pipe
operating systems. Pipes are created using the pipe system call, which creates a new pipe and returns a pair of file descriptors referring to the read and write
Anonymous_pipe
2022 death in Canton, Massachusetts, US
phone recorded as read at 12:27:48 am after being unlocked with Face ID. At 12:29:44 am, the phone logged a seven-second answered phone call from Jennifer;
Death_of_John_O'Keefe
Low level firmware interface to the hardware
without an operating system—especially game software). BIOS runs in the real address mode (Real Mode) of the x86 CPU, so programs that call BIOS either must
BIOS_interrupt_call
System calls in Unix-like operating systems
August 2015, FreeBSD introduced the read_random system call for obtaining random data from the kernel. These system calls allow processes to access quality
Entropy-supplying system calls
Entropy-supplying_system_calls
Offset that corresponds to the first byte beyond the length of a computer file
condition in a computer operating system where no more data can be read from a data source. The data source is usually called a file or stream. In the C standard
End-of-file
(acting like a carriage return except discarded from the buffer by the read() system call and therefore potentially causing a zero-length result to be returned)
Seventh Edition Unix terminal interface
Seventh_Edition_Unix_terminal_interface
Memory map - POSIX-compliant system call
In computing, mmap(2) is a POSIX-compliant Unix system call that maps files or devices into memory. It is a method of memory-mapped file I/O. It implements
Mmap
Taking in the meaning of letters or symbols
g. a, be, call, do, eat, fall, gave, etc.). The supposition (in whole language and balanced literacy) is that students will learn to read more easily
Reading
Unix-like software that manages kernel attributes
software mechanism in some Unix-like operating systems that reads and modifies the attributes of the system kernel such as its version number, maximum limits
Sysctl
Form of non-volatile memory used in computers and other electronic devices
manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware.
Read-only_memory
Way of using computer memory
computer operating system usually uses virtual memory to provide separate address spaces or regions of a single address space, called user space and kernel
User_space_and_kernel_space
Computer programming environment
A read–eval–print loop (REPL), also termed an interactive toplevel or language shell, is a simple interactive computer programming environment that takes
Read–eval–print_loop
Form of government
Westminster system, such as the United Kingdom, Denmark, Malaysia, Australia and New Zealand, the prime minister has the de facto power to call an election
Parliamentary_system
Proprietary file system by Apple
found on read-only media such as CD-ROMs. HFS is also referred to as Mac OS Standard (or HFS Standard), while its successor, HFS Plus, is also called Mac OS
Hierarchical File System (Apple)
Hierarchical_File_System_(Apple)
2011 American film by J. C. Chandor
average rating of 7.2/10. The website's consensus reads: "Smart, tightly wound, and solidly acted, Margin Call turns the convoluted financial meltdown of '08
Margin_Call
Planetary system consisting of the Sun and objects orbiting it
potential. The Solar System currently moves through a cloud of interstellar medium called the Local Cloud. The closest star to the Solar System, Proxima Centauri
Solar_System
Form of inter-process communication in computer systems
by the kernel while signals are mediated by the kernel (possibly via system calls) and handled by individual processes.[citation needed] The kernel may
Signal_(IPC)
System call for device-specific input/output operations
input/output control) is a system call for device-specific input/output operations and other operations which cannot be expressed by read/write/seek regular file
Ioctl
Convention of symbols representing language
A writing system is any conventional system for representing a particular language using a set of symbols (called a script), as well as the rules those
Writing_system
Process that is not running, but is in the process table
needed to allow the parent process to read its child's exit status: once the exit status is read via the wait system call, the defunct process' entry is removed
Zombie_process
Lightweight dynamic tracing environment
@@syscall:*:read:entry when ( __pid == 123456) { /* This is a comment: The process with a PID of 123456 has called read(); */ printf("read() system call entered
ProbeVue
Family of Unix-like operating systems
February. If you do not know the gist of the GNU copyright ─ read it. "Overview of the GNU System". Gnu.org. Archived from the original on February 28, 2009
Linux
Computer system that provides behavior needed by running code
If the boot is from read-only memory, a secure, single-mission system is created. Examples of such directly bundled runtime systems include: Between 1983
Runtime_system
Structured vocabulary for voice communication
Radio System (MARS) AFMARS Messaging Manual" (PDF). Archived from the original (PDF) on 25 September 2017. Retrieved 23 September 2017. "do you read me"
Procedure_word
Call assistance services
and read back the number. Most systems allowed up to two listings per call. Early operators worked from printed telephone directories. Later systems introduced
Operator_assistance
Distributed file system protocol
protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system. NFS is an open IETF standard. After the first experimental version
Network_File_System
Proprietary file system developed by Microsoft
1, it is the default file system of the Windows NT family superseding the File Allocation Table (FAT) file system. NTFS read/write support is available
NTFS
discussion system that uses the Network News Transfer Protocol (NNTP). Programs called newsreaders are used to read and post messages (called articles or
List_of_Usenet_newsreaders
Home video game console
The Nintendo Entertainment System (NES) is a home video game console developed and marketed by Nintendo. It was released as the Family Computer (Famicom)
Nintendo_Entertainment_System
Voice or tone user interface for telephony
Interactive voice response (IVR) systems are automated telephony systems that interact with callers, gather information, and route calls to the appropriate recipient
Interactive_voice_response
Experimental operating system from Microsoft Research
avoid the cost of task-switches. Protection in this system is provided by a set of rules called invariants that are verified by static program analysis
Singularity (operating system)
Singularity_(operating_system)
Core of a computer operating system
information to the kernel and switching to supervisor mode. System calls include close, open, read, wait and write. To actually perform useful work, a process
Kernel_(operating_system)
Radio station in Dishman, Washington, United States
Spokane media market. The station is owned by Thomas R. Read, through licensee Liberty Broadcasting System, LLC, and is the flagship for the American Christian
KSPO_(AM)
First letter of the Latin alphabet
used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English, the name of the
A
Computer operating system
management mounts activated packages over a read-only system directory. The Haiku package management system performs dependency solving with libsolv from
Haiku_(operating_system)
Storage segment
categorized into two sections: read-only and read/write. This distinction grew from early systems holding their main program in read-only memory such as Mask
Data_segment
Programming language evaluation rules
program (read and assign have been added to highlight the similarities to the Java Box call-by-sharing program above): #include <stdio.h> int read(int* p)
Evaluation_strategy
are known, but the texts still cannot be read because the language is not understood. Several of these systems, such as Isthmian script and Indus script
List_of_writing_systems
Data format used in communication protocols
T_CALLER_NUMBER, so the length field is read (i.e., 12) and the system skips forward 12 bytes to read T_PHONE_NUMBER_TO_CALL, which it understands, and message
Type–length–value
BIOS interrupt call for disk access
is shorthand for BIOS interrupt call 13hex, the 20th interrupt vector in an x86-based (IBM PC-descended) computer system. The BIOS typically sets up a real
INT_13H
Shell command for changing access permissions of a file
of the system call to a shell user. As the need for enhanced file-system permissions grew, access-control lists were added to many file systems to augment
Chmod
Midrange IBM computer from 1960s
FORTRAN G, FORTRAN H and PL/I F. CALL/OS is sometimes referred to as "CALL-OS". Installations with a larger model of the System/360 family sometimes ran/retained
IBM_System/360_Model_50
American satellite-based radio navigation service
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta
Global_Positioning_System
Write once computer memory
A programmable read-only memory (PROM) is a form of digital memory where the contents are set after the device is manufactured. Once set, the contents
Programmable_ROM
Armenian-American metal band
group to appear, but when a banner hanging at the back of the stage that read "System of a Down" was removed by security, the audience rushed the stage, destroying
System_of_a_Down
Educational software application
internet-based LMSs. The first fully featured Learning Management System (LMS) was called EKKO, developed and released by Norway's NKI Distance Education
Learning_management_system
Device file that discards all data written to it
Amiga operating systems, and NL: on OpenVMS. In Windows Powershell, the equivalent is $null. It provides no data to any process that reads from it, yielding
Null_device
Systems of coding and organizing documents or library materials
indexes. Each item is typically assigned a call number, which identifies the location of the item within the system. Materials can be arranged by many different
Library_classification
Vendor-neutral file system, used in practice for DVDs and other optical discs
prompt. The UDF standard defines three file system variations, called "builds". These are: Plain (Random Read/Write Access). This is the original format
Universal_Disk_Format
Computer memory management methodology
which result in a call to the supervisor (SVC) to perform the operation. In OS/360 the details vary depending on how the system is generated, e.g.,
Memory_management
Synchronization mechanism
science, read-copy-update (RCU) is a synchronization mechanism that avoids the use of lock primitives while multiple threads concurrently read and update
Read-copy-update
Numbers in the Roman numeral system
see question marks, boxes, or other symbols. Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers
Roman_numerals
read and write with Ext2 and Ext3 file systems only when a driver from FS-driver or Ext2Fsd is installed. However, using Explore2fs, Windows can read
Comparison of operating systems
Comparison_of_operating_systems
Programming language family
Lisp system. Lisp reads the entered expressions, evaluates them, and prints the result. For this reason, the Lisp command line is called a read–eval–print
Lisp_(programming_language)
Computer filing system
as whether the file is read-only, executable, etc. device type (e.g. block, character, socket, subdirectory, etc.) A file system stores associated metadata
File_system
Free Unix-like operating system kernel
implementations of underlying filesystems. VFS implements system calls like create, open, read, write and close. VFS implements a generic superblock and
Linux_kernel
Type of shared data structure
communicate by accessing shared data structures. A shared (read/write) register, sometimes just called a register, is a fundamental type of shared data structure
Shared_register
Tabletop horror role-playing game
system is based on Chaosium's Basic Role-Playing (BRP) with additions for the horror genre. These include special rules for sanity and luck. In Call of
Call of Cthulhu (role-playing game)
Call_of_Cthulhu_(role-playing_game)
Computer operating system
Microsoft started work on a program called "Interface Manager". The name "Windows" comes from the fact that the system was one of the first to use graphical
Microsoft_Windows
To check if an email has been read
or email tracker is a method for monitoring whether the email message is read by the intended recipient. Most tracking technologies use some form of digitally
Email_tracking
Sequence of program instructions invokable by other software
indication. A callable writes the value and the caller reads it after a call. In the IBM System/360, where return code was expected from a subroutine,
Function (computer programming)
Function_(computer_programming)
Voting system that makes outcomes proportional to vote totals
senator Daniel Webster. The list plan system was conceived by Thomas Gilpin, a retired paper-mill owner, in a paper he read to the American Philosophical Society
Proportional_representation
File format and file archiver program
with no file system, and the name is short for the format description "tape archive". When stored in a file system, a file that tar reads and writes is
Tar_(computing)
Computer resource for recording data on a storage device
unit by the system that manages it. Today, this system is called a file system. Many older computer systems lacked a distinct file system per se, yet
Computer_file
Sociotechnical infrastructure for centralized and digital health care management
A hospital information system (HIS) is an element of health informatics that primarily addresses the administrative and operational needs of hospitals
Hospital_information_system
Data storage technology
appropriate controller is needed that uses the fast SSD for all read operations. Adaptec calls this "hybrid RAID". Originally, there were five standard levels
RAID
American politician (born 1975)
Tobias Read (born July 1, 1975) is an American politician who is currently serving as the 30th Oregon Secretary of State since 2025. As a member of the
Tobias_Read
System call to examine the status of file descriptors of open input/output channels
select is a system call and application programming interface (API) in Unix-like and POSIX-compliant operating systems for examining the status of file
Select_(Unix)
Sandbox facility for Linux kernel
make any system calls except exit(), sigreturn(), read() and write() to already-open file descriptors. Should it attempt any other system calls, the kernel
Seccomp
Former United States emergency warning system
Emergency Broadcast System (EBS), sometimes called the Emergency Action Notification System (EANS), was an emergency warning system used in the United
Emergency_Broadcast_System
Directory structure used by a Unix-like operating system
programs that traditionally form a Unix system can store information in files so that other programs can read them, although pipes complemented it in
Unix_filesystem
2020 video game
recommended by 69% of critics. In a review of Call of the Sea in Black Gate, Neil Baker said "I've read criticisms that claim they can be a bit obtuse
Call_of_the_Sea
System of library classification
Services" – Library of Congress "Classification outline", LOC How to read LCC call numbers, geography.about.com (via The Wayback Machine) How to use LCC
Library of Congress Classification
Library_of_Congress_Classification
2014 first-person shooter video game
Warfare's multiplayer retains certain similarities to previous Call of Duty titles. The Pick 10 system in Black Ops II returns as Pick 13, allowing players to
Call of Duty: Advanced Warfare
Call_of_Duty:_Advanced_Warfare
Book series by Sarah J. Maas
completed the first draft. In March 2026, Sarah J. Maas confirmed on the Call Her Daddy podcast that the sixth through eighth books would be "a book told
A_Court_of_Thorns_and_Roses
Cast of neo-Western crime media franchise
Breaking Bad (2008–13), and was followed by a prequel/sequel series, Better Call Saul (2015–22), and a sequel film, El Camino: A Breaking Bad Movie (2019)
List of characters in the Breaking Bad franchise
List_of_characters_in_the_Breaking_Bad_franchise
Historical centralized version control system
July 1986. It builds on top of an older version control system called Revision Control System (RCS), adding support for repository-level change tracking
Concurrent_Versions_System
64-bit x86 register
It can also be disabled using the PR_SET_TSC argument to the prctl() system call. The time stamp counter can be used to time instructions accurately which
Time_Stamp_Counter
Unix command to commit all data in the kernel filesystem to non-volatile storage buffers
sync is a standard system call in the Unix operating system, which commits all data from the kernel filesystem buffers to non-volatile storage, i.e., data
Sync_(Unix)
Ancient Egyptian writing system
the left, they almost always must be read from left to right, and vice versa. As in many ancient writing systems, words are not separated by blanks or
Egyptian_hieroglyphs
Organized collection of data in computing
to provide the same scalable performance of NoSQL systems for online transaction processing (read-write) workloads while still using SQL and maintaining
Database
Report Program Generator version II programming language by IBM
systems of the time such as the IBM 1130, IBM System/3, System/32, System/34, System/36. It was also available for the System/370, The Singer System 10
IBM_RPG_II
Form of input/output processing
its next operation. (For example, the CP/M operating system was built this way. Its system call semantics did not require any more elaborate I/O structure
Asynchronous_I/O
Family of disk operating systems
for user programs. The first layer of the operating system is called RWTS, which stands for "read/write track sector". This layer consists of subroutines
Apple_DOS
Software-based, block-level cache of drive data stored in the host computer's main memory
and the operating system might even report such memory as "free" or "available". When compared to main memory, hard disk drive read/writes are slow and
Page_cache
Journaling file system for Linux
standard POSIX calls, such as open, read, write, lseek, etc. Although designed for and primarily used with Linux, an ext4 file system can be accessed
Ext4
Copy-on-write file system developed by Apple
clonefile system call. APFS volumes support snapshots for creating a point-in-time, read-only instance of the file system. Apple File System natively supports
Apple_File_System
American film rating system
system is used in the United States and its territories to rate a motion picture's suitability for certain audiences based on its content. The system
Motion Picture Association film rating system
Motion_Picture_Association_film_rating_system
READ SYSTEM-CALL
READ SYSTEM-CALL
Boy/Male
American, Anglo, Australian, British, English, Scottish
Redheaded; With Red Hair; Surname
Boy/Male
English
Red haired.
Female
Greek
Variant spelling of Greek Rhea, REAH means "ease, flow."
Surname or Lastname
English
English : variant spelling of Read.
Male
English
Variant spelling of English Read, REID means "red-headed; ruddy complexioned."Â
Boy/Male
English
Red.
Surname or Lastname
English
English : variant of Read 1.
Male
English
English surname transferred to forename use, derived from an Old English byname, Red, READ means "red-headed or ruddy-complexioned."Â
Boy/Male
English
Red.
Boy/Male
American, Australian, British, Chinese, Christian, English, Scottish, Swedish
A Ruddy Complexion; Red Haired; Surname
Boy/Male
American, Anglo, Australian, British, Christian, English, Jamaican
Form of Reed; A Reed; Red-haired
Surname or Lastname
English
English : nickname for a person with red hair or a ruddy complexion, from Middle English re(a)d ‘red’.English : topographic name for someone who lived in a clearing, from an unattested Old English rīed, r̄d ‘woodland clearing’.English : Read in Lancashire, the name of which is a contracted form of Old English rǣghēafod, from rǣge ‘female roe deer’, ‘she-goat’ + hēafod ‘head(land)’; Rede in Suffolk, so called from Old English hrēod ‘reeds’; or Reed in Hertfordshire, so called from an Old English ryhð ‘brushwood’.English : A family called Read were established in America in the early 18th century by John Read, who was born in Dublin, sixth in descent from Sir Thomas Read of Berkshire, England. His son, George Read (1733–98), was one of the signers of the Declaration of Independence, and as a lawyer helped frame the Constitution.
Male
English
Variant spelling of English Red, REDD means "red-headed; ruddy complexioned."
Boy/Male
English American Scottish
Red haired.
Boy/Male
American, British, Christian, English, Scottish
Redheaded; Surname; Red Headed; Ruddy Complexioned
Boy/Male
American, Anglo, British, Christian, English, German, Hindu, Indian, Scottish
Red-headed; Red Haired; Ruddy Complexioned
Boy/Male
Arabic, Australian, British, English, Muslim
Leader; Red
Boy/Male
British, English
Red Haired
Male
English
Variant spelling of English Read, REED means "red-headed; ruddy complexioned."
Surname or Lastname
English
English : variant spelling of Read 1.
READ SYSTEM-CALL
READ SYSTEM-CALL
Girl/Female
American, British, English
Sincere; Eagle
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Vanquishing Armies
Boy/Male
Muslim
Girl/Female
Indian, Sikh
A Beautiful Gift by God
Boy/Male
Indian, Punjabi, Sikh
Revelation of the Divine Light
Boy/Male
Indian
Poet, Knowledgeable
Girl/Female
Indian
Gold
Boy/Male
Biblical
Gift of God.
Boy/Male
Hindu
Petience
Boy/Male
Greek
God of fertility.
READ SYSTEM-CALL
READ SYSTEM-CALL
READ SYSTEM-CALL
READ SYSTEM-CALL
READ SYSTEM-CALL
n.
An assemblage of objects arranged in regular subordination, or after some distinct method, usually logical or scientific; a complete whole of objects related by some common law, principle, or end; a complete exhibition of essential principles or facts, arranged in a rational dependence or connection; a regular union of principles or parts forming one entire thing; as, a system of philosophy; a system of government; a system of divinity; a system of botany or chemistry; a military system; the solar system.
a.
Of or relating to a system; common to a system; as, the systemic circulation of the blood.
n.
Regular method or order; formal arrangement; plan; as, to have a system in one's business.
v. t.
To go over, as characters or words, and utter aloud, or recite to one's self inaudibly; to take in the sense of, as of language, by interpreting the characters with which it is expressed; to peruse; as, to read a discourse; to read the letters of an alphabet; to read figures; to read the notes of music, or to read music; to read a book.
a.
Of or pertaining to the general system, or the body as a whole; as, systemic death, in distinction from local death; systemic circulation, in distinction from pulmonic circulation; systemic diseases.
n.
A headdress; a covering of the head; as, a laced head; a head of hair.
n.
Rennet. See 3d Reed.
a.
Inspiring with reverential fear; awful' venerable; as, dread sovereign; dread majesty; dread tribunal.
a.
Lacking spirit; dull; lusterless; cheerless; as, dead eye; dead fire; dead color, etc.
imp. & p. p.
of Read
v. t.
To stem, or move against; as, to restem a current.
v. i.
To produce a certain effect when read; as, that sentence reads queerly.
v. t.
To be at the head of; to put one's self at the head of; to lead; to direct; to act as leader to; as, to head an army, an expedition, or a riot.
n.
An assemblage of parts or organs, either in animal or plant, essential to the performance of some particular function or functions which as a rule are of greater complexity than those manifested by a single organ; as, the capillary system, the muscular system, the digestive system, etc.; hence, the whole body as a functional unity.
v. t.
To make a special study of, as by perusing textbooks; as, to read theology or law.
v. i.
To study by reading; as, he read for the bar.
v. t.
To interpret; to explain; as, to read a riddle.