linux c create file if not exists
2010年2月19日—ImwritinganappwhereIneedtoopenafile,readdata,checkaelementofthestructtoseeifmydataalreadyexists.ifexistsIupdate ...,2018年4月29日—Simplyopenthefileonce,forwriting(i.e.wmode).Ifthefiledoesnotexist,itwillbecreated;andifitexists,itscon...
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IfO_EXCLissetwithO_CREATandthefilealreadyexists,open()returnsanerror.Thismaybeusedtoimplementasimpleexclusiveaccesslockingmechanism.
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