Distinguish2 Unix , Unix like , or Linux POSIX IPAc en icon p z k s respell POZ iks , an acronym ... operating system s. POSIX defines the application programming interface API , along with command line ... operating systems. ref name FAQ ref name IET cite web title POSIX url http standards.ieee.org regauth posix work Standards publisher IEEE ref Name Originally, the name POSIX referred to IEEE Std 1003.1 1988, released in 1988. The family of POSIX standards is formally designated as IEEE 1003 ... that began circa 1985. Richard Stallman suggested the name POSIX in response to an IEEE request for a memorable name. ref name FAQ cite web date 2006 02 02 title POSIX 1003.1 FAQ Version 1.12 url http www.opengroup.org austin papers posix faq.html accessdate 2006 07 16 ref Overview The POSIX ... services. POSIX also defines a standard thread computer science threading library API which is supported by most modern operating systems. Nowadays, most of POSIX parts are combined into a single standard, IEEE Std 1003.1 2008 , also known as POSIX.1 2008 . As of 2009 , POSIX documentation is divided in two parts POSIX.1 2008 POSIX Base Definitions, System Interfaces, and Commands and Utilities ... Utilities POSIX Conformance Testing A test suite for POSIX accompanies the standard PCTS or the POSIX Conformance Test Suite . ref name NIST cite web url http www.itl.nist.gov div897 ctg posix form.htm title POSIX publisher NIST ref The development of the POSIX standard takes place in the Austin ... 1997 Before 1997, POSIX comprised several standards POSIX.1 POSIX.1, Core Services incorporates Standard ... Shared Memory Asynchronous I O Asynch and Synch I O Memory Locking Interface POSIX.1c POSIX.1c, POSIX ... Group developed the POSIX revisions. The specifications are known under the name Single UNIX Specification , before they become a POSIX standard when formally approved by the ISO. POSIX.1 2001 ... revision to POSIX and the Single UNIX Specification accessdate 2009 07 26 date January 30, 2002 ... more details
Manual date April 2010 Citation style date April 2010 POSIX Threads , usually referred to as Pthreads , is a POSIX standard for thread computer science thread s. The standard, POSIX.1c, Threads extensions IEEE Std 1003.1c 1995 , defines an Application programming interface API for creating and manipulating threads. Implementations of the API are available on many Unix like POSIX conformant operating systems such as FreeBSD , NetBSD , OpenBSD , Linux GNU Linux , Mac OS X and Solaris operating system Solaris . DR DOS and Microsoft Windows implementations also exist within the Windows Services for UNIX SFU SUA subsystem which provides a native implementation of a number of POSIX APIs, and also within third party packages such as pthreads w32 , ref cite web url http sources.redhat.com pthreads win32 conformance.html title Pthread Win 32 Level of standards conformance date 2006 12 22 accessdate 2010 08 29 ref which implements pthreads on top of existing Windows API . Contents Pthreads defines ... using read write locks and barriers The POSIX semaphore programming semaphore API works with POSIX ..., making it a global variable . POSIX Threads for Windows Windows does not support the pthreads ... Native POSIX Thread Library NPTL DCEThreads clone Linux system call Spurious wakeup Thread local storage ... cite book author David R. Butenhof title Programming with POSIX Threads publisher Addison Wesley ... developerworks linux library l posix1.html POSIX threads explained by Daniel Robbins Gentoo ... about parallel programming and posix threads Ten Questions with David Butenhof about Parallel Programming and POSIX Threads by Michael Suess http sources.redhat.com pthreads win32 Open Source POSIX Threads ... Comparing programmability of Open MP and pthreads Parallel Computing DEFAULTSORT Posix Threads Category C POSIX library Category Parallel computing Category Threads computing ko POSIX ja POSIX pl POSIX Threads pt POSIX Threads ru POSIX Threads uk Pthread zh POSIX ... more details
Merge to Unix signal discuss Talk Unix signal Merging individual signal pages date January 2012 No footnotes date December 2008 Infobox Computing signal name SIGINT description Terminal interrupt signal action Abnormal termination of the process On POSIX compliant platforms, SIGINT is the Signal computing signal sent to a process computing process by its controlling terminal when a user wishes to interrupt the process. In source code , SIGINT is a C preprocessor symbolic constant defined in the header file code signal.h code . Symbolic signal names are used because a signal s numeric value can vary across platforms on the vast majority of systems, it is signal 2 Etymology SIG is a common Prefix linguistics prefix for signal names. INT is an abbreviated form of interrupt . Usage SIGINT is sent when the user on the process controlling terminal controlling computer terminal terminal presses the interrupt the running process key typically Control C, but on some systems, the Delete key delete character or break key break key. External links http www.cons.org cracauer sigint.html In depth discussion of SIGINT handling See also SIGQUIT SIGTERM Computing signals fr SIGINT POSIX no SIGINT POSIX ru SIGINT ... more details
C POSIX library The C POSIX library is a specification of a C standard library for POSIX systems. It was developed at the same time as the ANSI C standard. Some effort was made to make POSIX compatible with standard C POSIX includes additional functions to those introduced in standard C. C POSIX library header files class wikitable sortable Header File Description cpio.h File format Magic number Magic number s for the cpio archive format. dirent.h Allows the opening and listing of directory file systems directories . fcntl.h File opening, File locking locking and other operations. grp.h User Group identifier Unix group information and control. pthread.h Defines an API for creating and manipulating POSIX threads. pwd.h Passwd file passwd user information access and control. sys ipc.h Inter process communication IPC . sys msg.h POSIX message queue s. sys sem.h POSIX Semaphore programming semaphore s. sys stat.h File information stat Unix stat et al. . C date and time functions sys time.h Time and date functions and structures. sys types.h Various data types used elsewhere. sys utsname.h uname and related structures. sys wait.h Status of terminated child processes see wait operating system wait tar.h File format Magic number Magic number s for the tar file format tar archive format. termios.h Allows Serial port terminal I O interfaces. unistd.h Various essential POSIX functions and constants. utime.h inode access and modification times. Verify source date January 2010 References http www.opengroup.org onlinepubs 9699919799 idx head.html Official List of headers in the POSIX library on opengroup.org http web.archive.org web http www.space.unibe.ch comp doc c manual C FUNCTIONS funcref.htm Lists headers in the POSIX library http www.cs.utah.edu flux oskit html oskit wwwch20.html Description of the posix library from the Flux OSKit refbegin citation first1 Bill last1 Gallmeister ... Category C POSIX library Category POSIX ru C POSIX library ... more details
Microsoft POSIX subsystem is one of 3 subsystems of several operating system s from the Windows NT family together with OS 2 and Windows subsystems . Microsoft Windows implements only the first version of the POSIX standardization standards , namely POSIX.1. The official code of POSIX.1 is ISO IEC 9945 1 1990 or IEEE standard 1003 1 1990. The subsystem was included because of 1980s Federal government of the United States US federal government s requirements listed in Federal Information Processing Standard FIPS 151 2 ref cite web url http www.itl.nist.gov fipspubs fip151 2.htm title Federal Information Processing Standards Publication 151 2 ref . Versions Windows NT 3.5 , Windows NT 3.51 and Windows NT 4 were certified as compliant with the FIPS 151 2. The runtime environment of the subsystem is provided by two files psxss.exe and psxdll.dll . A POSIX application uses psxdll.dll to communicate with the subsystem while communicating with posix.exe to provide display capabilities on the Windows desktop. Because only the first version of POSIX POSIX.1 is implemented, a POSIX application cannot create a Thread computer science thread or Window computing window , nor can it use Remote procedure call RPC or Internet socket socket s. Instead of implementing the later versions of POSIX, Microsoft offers Windows Services for UNIX . Starting with Windows XP , the POSIX subsystem is not included as part of standard Windows distributions and has been replaced by Interix . ref cite web url http support.microsoft.com kb 308259 title POSIX and OS 2 are not supported in Windows XP, in Windows Server 2003 or later releases ref See also MKS Toolkit UWIN Cygwin UnxUtils References reflist refbegin cite book author Mark Russinovich Russinovich, Mark coauthors David A. Solomon David Solomon date December 8, 2004 title Microsoft Windows Internals edition Fourth Edition publisher Microsoft Press ... POSIX Category Compatibility layers de POSIX Subsystem ... more details
The Native POSIX Thread Library NPTL is a software feature that enables the Linux kernel to run programs written to use POSIX Threads efficiently. History Before the 2.6 version of the Linux kernel , processes were the schedulable entities, and there was no real support for Thread computer science threads . However, it did support a system call tt clone Linux system call clone tt which creates a copy of the calling process where the copy shares the address space of the caller. The LinuxThreads project used this system call to provide kernel level thread support most of the previous pthread implementations in Linux worked entirely in Userland computing userland . Unfortunately, it had a number of issues with true POSIX compliance, particularly in the areas of signal handling, scheduling, and inter process synchronization primitives. To improve upon LinuxThreads, it was clear that some kernel support and a re written threads library would be required. Two competing projects were started to address the requirement NGPT Next Generation POSIX Threads worked on by a team which included developers from IBM , and NPTL by developers at Red Hat . NGPT was abandoned in mid 2003, at about the same time when NPTL was released. NPTL was first released in Red Hat Linux 9. Old style Linux POSIX threading is known for having trouble with threads that refuse to yield to the system occasionally, because ... POSIX Thread Trace Tool http sourceforge.net projects nptltracetool PTT . And an http posixtest.sourceforge.net Open POSIX Test Suite http sourceforge.net projects posixtest OPTS was written for testing the NPTL library against the POSIX standard. Design NPTL uses a similar approach to LinuxThreads ... Native Posix Thread Library Category Linux kernel Category C POSIX library Category Threads computing de Native POSIX Thread Library ja Native POSIX Thread Library pl Native POSIX Thread Library pt Native POSIX Thread Library ru POSIX fi Native POSIX Thread Library zh Native POSIX ... more details
The ANSI POSIX Environment APE is a compatibility layer compatibility subsystem for the Plan 9 from Bell Labs Plan 9 operating system, that implements an interface close to ANSI C and POSIX , with some common extensions the native Plan 9 C interfaces conform to neither standard . It also includes a POSIX compatible shell. APE s authors claim to have used it to port the X Window System X11 to Plan 9, although they do not ship X11 because supporting it properly is too big a job . ref cite web url http plan9.bell labs.com sys doc ape.html title APE The ANSI POSIX Environment first Howard last Trickey work Plan 9 The Documents Volume 2 publisher Bell Labs accessdate 2011 04 27 ref References Reflist Category Plan 9 from Bell Labs Category Compatibility layers ... more details
The POSIX terminal interface is the generalized abstraction, comprising both an Application Programming Interface for programs, and a set of behavioural expectations for users of a terminal telecommunication terminal , as defined by the POSIX standard and the Single Unix Specification . It is a historical development from the terminal interfaces of BSD version 4 and Seventh Edition Unix . General underlying concepts Hardware A multiplicity of I O devices are regarded as terminals in Unix systems. sfn Christian 1988 p 11 sfn Bourne 1983 p 6 These include serial device s connected by a serial port such as printer computing printer s teleprinter s, teletypewriter s, modem s supporting remote terminal telecommunication terminal s via dial up access , and directly connected local terminals sfn Christian 1988 p 11 sfn Coffin 1991 p 820 sfn Coffin 1991 p 23&ndash 24 sfn Leffler McKusick Karels Quarterman 1989 p 259 display adapter and Keyboard computing keyboard hardware directly incorporated into the system unit, taken together to form a local console , which may be presented to users and to programs as a single CRT terminal or as multiple virtual terminal s sfn Christian 1988 p 11 software terminal emulator s, such as the xterm program and the konsole program and network servers such as the rlogin ... off a STREAMS I O stack. sfn Christian 1988 p 395 History The POSIX terminal interface is derived ...&ndash 263 POSIX Consolidation and abstraction One of the major problems that the POSIX standard addressed ... Zlotnick 1991 p 157 The POSIX standard replaces the code ioctl code system entirely, with a set of library ... V Unix was used as a template for the POSIX code termios code data structure, whose fields were ... sfn Zlotnick 1991 p 163 POSIX also replaces the cooked , cbreak , and raw modes of Seventh Edition ... book ref harv chapter Terminal I O title POSIX programmer s guide writing portable UNIX programs with the POSIX.1 ... Media, Inc. year 1991 isbn 9780937175736 Category POSIX ru TTY ... more details
ISO 15897 is an International Organization for Standardization ISO standard for the registration of new POSIX locale s and POSIX Character Map charmaps . Items registered in the registry are Narrative Cultural Specifications POSIX Locales POSIX Charmaps Repertoiremaps It overlaps somewhat with the Common Locale Data Repository CLDR project hosted at the Unicode Consortium . The registry has not been updated since December 2001. External links http www.open std.org jtc1 sc22 wg20 docs n610.pdf Draft of the standard free http std.dkuug.dk cultreg The registry ISO standards Category ISO standards 15897 standard stub yo ISO 15897 ... more details
OpenC can refer to OpenC software tool OpenC is a software tool to parse and analyze C source code. OpenC or OpenC is an extension by Nokia of the P.I.P.S. Is POSIX on Symbian library. disambiguation ... more details
lowercase bg is a job control Unix job control command in Unix and Unix like operating systems that resumes execution of a suspended Process computing process without bringing it to the foreground ref name bg man page http pwet.fr man linux commandes posix bg bg man page ref the resumed process continues to execute in the background without receiving user input from the Computer terminal terminal . bg is required to be included in an operating system in order for it to be POSIX compliant. ref name POSIX commands http manuals.fujitsu siemens.com servers bs2 man man us posix v6 0 posix k.pdf POSIX BS2000 OSD Commands User Guide ref See also fg Unix fg , the complementary command that brings a process to the foreground References Reflist Unix commands Category Standard Unix programs Category Unix SUS2008 utilities unix stub ca Bg Unix el Bg Unix fr Bg Unix zh Bg Unix ... more details
lowercase pr is used to paginate or columnate files for printing. It is a required program in a POSIX compliant environment and has been implemented by GNU as part of the GNU Core Utilities . External links http www.linuxmanpages.com man1 pr.1.php The program s manpage http linux documentation.com en man man1p pr.html POSIX standard for pr Unix commands Category Unix SUS2008 utilities el Pr Unix es Pr ... more details
lowercase fg is a job control Unix job control command in Unix and Unix like operating systems that resumes execution of a suspended Process computing process by bringing it to the foreground and thus redirecting its standard input and standard output output streams to the user s computer terminal terminal . ref name man http www.computerhope.com unix ufg.htm fg man page ref fg is required to be included in an operating system in order for it to be POSIX compliant. ref name POSIX commands http manuals.fujitsu siemens.com servers bs2 man man us posix v6 0 posix k.pdf POSIX BS2000 OSD Commands User Guide ref See also bg Unix bg , the complementary command that sends a process to the background SIGCONT References Reflist External links man cu fg SUS run jobs in the foreground Unix commands Category Standard Unix programs Category Unix SUS2008 utilities Unix stub ca Fg Unix el Fg Unix fr Fg Unix pl Fg Unix zh Fg Unix ... more details
lowercase tt truss tt is a system tool available on some Unix like operating systems. When invoked with an additional executable command line argument , tt truss tt makes it possible to print out the system calls made by and the signals received by this executable command line argument. As of version POSIX POSIX 2008 IEEE Std 1003.1 2008 , tt truss tt is not part of the Single UNIX Specification POSIX . External links http download.oracle.com docs cd E19082 01 819 2239 truss 1 index.html Solaris man page for tt truss tt http www.freebsd.org cgi man.cgi?query truss FreeBSD man page for tt truss tt See also strace Category Unix programming tools programming software stub ... more details
lowercase C POSIX library utime.h is the header in the C POSIX library for the C programming language that facilitates the setting of file access and modification times. Member functions code int utime const char path, const struct utimbuf times code This function sets the access and modification times of the specified file. The utime function sets the access and modification times of the file named by the path argument. Member types Data types defined in the code utime.h code header include code struct utimbuf code code time t actime code access time code time t modtime code modification time The times are measured in seconds since the UNIX Epoch Epoch . References http opengroup.org onlinepubs 007908775 xsh utime.h.html http opengroup.org onlinepubs 007908775 xsh utime.html Category C headers Category C POSIX library ... more details
Sigint or SIGNIT may refer to SIGINT , SIGnals INTelligence, which is intelligence gathering by interception of signals SIGINT POSIX , a UNIX signal List of Metal Gear Solid 3 characters Sigint Sigint character , from Metal Gear Solid 3 disambig de SIGINT ja SIGINT sl SIGINT ... more details
infobox filesystem name Episode full name Episode developer Transarc introduction os introduction date 1992 partition id directory struct 8KB blocks with hash table file struct inode based bad blocks struct max filename size 256 bytes max files no sup max volume size max file size filename character set dates recorded date range forks streams No attributes POSIX file system permissions POSIX ACLs compression No encryption No OS IBM AIX operating system AIX , Solaris operating system Solaris , z OS Episode is a POSIX compliant file system most commonly known for its use in DCE Distributed File System DCE DFS file servers. It was designed to achieve the goals of portability, scaling, and to make more efficient use of available system bandwidth. It used a variety of methods to achieve these goals, one of which was its use of metadata logging, designed to enhance the file system s performance. The Episode file system is the basis for the IBM z OS POSIX compatible file system called zFS IBM file system zFS . External links http citeseerx.ist.psu.edu viewdoc summary?doi 10.1.1.37.6439 The Episode File System USENIX Paper Category Disk file systems compu storage stub Filesystem ... more details
Infobox software name GNU Portable Threads logo Image GNU Pth logo.jpg 170px developer Ralf S. Engelschall latest release version 2.0.7 latest release date 8 June 2006 operating system POSIX genre Runtime library license GNU Lesser General Public License LGPL website http www.gnu.org software pth www.gnu.org software pth GNU Pth Portable Threads is a POSIX ANSI C programming language C based user space Thread computer science thread library for UNIX platforms which provides priority based scheduling for Thread computer science multithreading applications. GNU Pth targets for a high degree of Portability software portability . Pth also provides application programming interface API emulation for POSIX Threads POSIX threads for backward compatibility. GNU Pth uses a M 1 mapping to kernel space threads, i.e., the scheduling is done completely by the GNU Pth library and the kernel itself is not aware of the M threads in user space. Because of this there is no possibility to utilize Symmetric multiprocessing SMP as kernel dispatching would be necessary. See also Portal Free software Fiber computer science Fiber External links http www.gnu.org software pth Official homepage ftp ftp.gnu.org gnu pth Downloads GNU DEFAULTSORT Gnu Portable Threads Category Application programming interfaces Category C libraries Category GNU Project software Category Threads computing ... more details
EIO may refer to Enhanced Input Output, a hardware extension interface for printers, see JetDirect EIO code EIO code Error Input Output , a POSIX error code Elektro Installation Oberlind, former enterprise in GDR The Environmental Investment Organisation , a UK based finance and climate change thinktank. disambiguation zh EIO ... more details
Broken pipe may refer to a character , also known as a broken bar a condition in programming also known in POSIX as code EPIPE code error code and code SIGPIPE code signal , when a process requests an output to pipe computing pipe or network socket socket , which was closed by peer disambiguation ... more details
For most file systems, a program terminates access to a file in a filesystem using the close system call. This flushes buffers, updates file metadata which may include and end of file indicator in the data , de allocates resources associated with the file including the file descriptor and updates the system wide table of files in use. Some languages maintain a structure of files opened by its run time library and may close when the program terminates. Some operating systems will invoke the close if the program terminates. Some operating systems will invoke the close as part of an operating system recovery as a result of a system failure. C library POSIX definition The http pubs.opengroup.org onlinepubs 9699919799 functions close.html close call is standardized by the POSIX specification int close int filedes int fclose FILE stream The function returns zero to indicate the file was closed successfully. If any error occurs, a value of 1 is returned and errno is appropriately set. The errors that can occur include table tr td EBADF td td The argument supplied was not a valid file descriptor td tr tr td EINTR td td The function call was interrupted by a Signal computing signal td tr tr td EIO td td An I O error occurred td tr table References http pubs.opengroup.org onlinepubs 009695399 functions close.html POSIX close Category C POSIX library ... more details
In most modern operating systems , a program that needs to access data from a file stored in a filesystem uses the read system call. The file is identified by the file descriptor that is obtained from a previous call to Open system call open . This system call reads data, in bytes as specified by the caller, from the file and stores then into a buffer supplied by the calling process. The read system call can take three arguments The file descriptor of the file, the buffer where the read data is to be stored and the number of bytes to be read from the file. UNIX number 3 POSIX usage The read system call interface is standardized by the POSIX specification. Data from a file is read by calling the read function source lang c ssize t read int fd, void buf, size t count source The value returned is the number of bytes read zero indicates end of file and the file position is advanced by this number. It is not an error if this number is smaller than the number of bytes requested this may happen for example because fewer bytes are actually available right now maybe because we were close to end of file, or because we are reading from a Pipe Unix pipe , or from a Computer terminal terminal , or because the system call was interrupted by a Signal computing signal . Alternatively. 1 is returned when an error occurs, in such a case errno is set appropriately and it is left unspecified whether the file position if any changes. References http pubs.opengroup.org onlinepubs 009695399 functions read.html POSIX read Category C POSIX library ... more details
merge to Error code discuss Talk C standard library Pages for each function and WP NOTMANUAL date October 2011 Context date October 2009 In programming, ENOBUFS is a POSIX error code defined in errno.h . This condition caused by lack of random access memory memory in the operating system OS s data buffer buffers . ref http www.freebsd.org cgi man.cgi?query errno&apropos 0&sektion 0&manpath FreeBSD 6.2 RELEASE&format html FreeBSD System Error codes ref ref http www.gnu.org software libc manual html node Error Codes.html index ENOBUFS 117 GNU C library manual Error codes ref Typically occurs in socket programming . References references compu prog stub Category POSIX error codes ... more details
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