dlopen_dlopen怎么用_ios dlopen

dlopendlopen

这个跟你一样的，有何用意？

看看你的Linux系统上dlopen的具体实现。

dlopen()

Thefunctiondlopen()loadsthedynamiclibraryfilenamedbythenull-terminatedstringfilenameandreturnsanopaque

"handle"forthedynamiclibrary.IffilenameisNULL,thenthereturnedhandleisforthemainprogram.Iffilenamecon‐

tainsaslash("/"),thenitisinterpretedasa(relativeorabsolute)pathname.Otherwise,thedynamiclinkersearches

forthelibraryasfollows(seeld.so(8)forfurtherdetails):

o(ELFonly)IftheexecutablefileforthecallingprogramcontainsaDT_RPATHtag,anddoesnotcontainaDT_RUNPATH

tag,thenthedirectorieslistedintheDT_RPATHtagaresearched.

oIf,atthetimethattheprogramwasstarted,theenvironmentvariableLD_LIBRARY_PATHwasdefinedtocontainacolon-

separatedlistofdirectories,thenthesearesearched.(Asasecuritymeasurethisvariableisignoredforset-user-

IDandset-group-IDprograms.)

o(ELFonly)IftheexecutablefileforthecallingprogramcontainsaDT_RUNPATHtag,thenthedirectorieslistedin

thattagaresearched.

oThecachefile/etc/ld.so.cache(maintainedbyldconfig(8))ischeckedtoseewhetheritcontainsanentryforfile‐

name.

oThedirectories/liband/usr/libaresearched(inthatorder).

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