About: File descriptor

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In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a unique identifier (handle) for a file or other input/output resource, such as a pipe or network socket. File descriptors typically have non-negative integer values, with negative values being reserved to indicate "no value" or error conditions. File descriptors are a part of the POSIX API. Each Unix process (except perhaps daemons) should have three standard POSIX file descriptors, corresponding to the three standard streams:

Attributes	Values
rdf:type	Thing chemical compound
rdfs:label	File descriptor (en)
rdfs:comment	In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a unique identifier (handle) for a file or other input/output resource, such as a pipe or network socket. File descriptors typically have non-negative integer values, with negative values being reserved to indicate "no value" or error conditions. File descriptors are a part of the POSIX API. Each Unix process (except perhaps daemons) should have three standard POSIX file descriptors, corresponding to the three standard streams: (en)
rdfs:seeAlso	Berkeley sockets
sameAs	File descriptor File descriptor
dbp:wikiPageUsesTemplate	dbt:Mono dbt:R dbt:Reflist dbt:Rp dbt:See_also dbt:Short_description dbt:Visible_anchor dbt:Object-capability_security
Subject	POSIX Unix file system technology
Link from a Wikipa... related subject.	dbpedia-de:Handle
thumbnail	wiki-commons:Special:FilePath/File_table_and_inode_table.svg?width=300
foaf:depiction
gold:hypernym	Indicator
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/File_descriptor?oldid=1067783414&ns=0
Wikipage page ID	608754 (xsd:integer)
page length (characters) of wiki page	12716 (xsd:nonNegativeInteger)
Wikipage revision ID	1067783414 (xsd:integer)
Link from a Wikipage to another Wikipage	Process (computing) Process identifier Unistd.h Write (system call) API Anonymous pipe Select (Unix) Stat (system call) Unix Unix-like Unix domain socket Unix file types C-list (computer security) C file input/output Capability-based security POSIX Directory (computing) Named pipe POSIX Working directory Daemon (computing) Tux Pipeline (Unix) Splice (system call) Time-of-check to time-of-use Close (system call) Computer file Dup (system call) Open (system call) Epoll File Control Block Fuser (Unix) Mmap System call System resource Device file Handle (computing) Inode Input/output Ioctl Kqueue Unix file system technology Lsof Standard streams Path (computing) Network socket Poll (Unix) Read (system call)
has abstract	In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a unique identifier (handle) for a file or other input/output resource, such as a pipe or network socket. File descriptors typically have non-negative integer values, with negative values being reserved to indicate "no value" or error conditions. File descriptors are a part of the POSIX API. Each Unix process (except perhaps daemons) should have three standard POSIX file descriptors, corresponding to the three standard streams: (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/File_descriptor
is Wikipage redirect of	File Descriptor File descriptor table File table Filehandle Lseek File descriptors File handle File handles Fcntl Fcntl.h Unbuffered IO
is Link from a Wikipage to another Wikipage of	Fork (system call) Fork–exec Greater-than sign Grid file system Non-blocking I/O (Java) Advanced Programming in the Unix Environment AmigaOS Ampersand Anonymous pipe Application checkpointing Asynchronous I/O Berkeley Software Distribution Berkeley sockets

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