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1、IEEEStd1003.1-2001(RevisionofIEEEStd1003.1-1996andIEEEStd1003.2-1992)OpenGroupTechnicalStandardBaseSpecifications,Issue6TM1003.1StandardforInformationTechnology—ÒPortableOperatingSystemInterface(POSIX)ShellandUtilities,Issue6Approved12September2001TheOpenGroupIEEESponsorPortableApplicatio
2、nsStandardsCommitteeoftheIEEEComputerSocietyApproved6December2001IEEE-SAStandardsBoardAbstractThisstandarddefinesastandardoperatingsysteminterfaceandenvironment,includingacommandinterpreter(or‘‘shell’’),andcommonutilityprogramstosupportapplicationsportabilityatthesourcecodelevel.Itisthesi
3、nglecommonrevisiontoIEEEStdÒ1003.1-1996,IEEEStd1003.2-1992,andtheBaseSpecificationsofTheOpenGroupSingleUNIX†Specification,Version2.Thisstandardisintendedtobeusedbybothapplicationsdevelopersandsystemimplementorsandcomprisesfourmajorcomponents(eachinanassociatedvolume):·Generalterms,concepts
4、,andinterfacescommontoallvolumesofthisstandard,includingutilityconventionsandC-languageheaderdefinitions,areincludedintheBaseDefinitionsvolume.·Definitionsforsystemservicefunctionsandsubroutines,language-specificsystemservicesfortheCprogramminglanguage,functionissues,includingportability,err
5、orhandling,anderrorrecovery,areincludedintheSystemInterfacesvolume.·Definitionsforastandardsourcecode-levelinterfacetocommandinterpretationservices(a‘‘shell’’)andcommonutilityprogramsforapplicationprogramsareincludedintheShellandUtilitiesvolume.·Extendedrationalethatdidnotfitwellintotheres
6、tofthedocumentstructure,containinghistoricalinformationconcerningthecontentsofthisstandardandwhyfeatureswereincludedordiscardedbythestandarddevelopers,isincludedintheRationale(Informative)volume.Thefollowingareasareoutsidethescopeofthisstandard:·Graphicsinterfaces·Databasemanagementsyste
7、minterfaces·RecordI/Oconsiderations·Objectorbinarycodeportability·SystemconfigurationandresourceavailabilityThisstandarddescribestheexternalcharacteristicsandfacilitiesthatareofimportancetoapplicationsdevelopers,ratherthantheinternalconstructiontechniquesemployedtoachievet
