Zolemba kuchokera ku lamulo kupita ku chipolopolo zimaperekedwa kudzera mumtsinje wa stdout (standard out). Mauthenga olakwika kuchokera ku lamulo amatumizidwa kudzera mumtsinje wa stderr (standard error).
Kodi stdout ndi stderr ndi chiyani?
M'mapulogalamu apakompyuta, mitsinje yokhazikika imalumikizidwa ndi njira zolumikizirana zolumikizirana pakati pa pulogalamu yamakompyuta ndi chilengedwe chake ikayamba kuchitidwa. Malumikizidwe atatu olowetsa/kutulutsa (I/O) amatchedwa standard input (stdin), standard output (stdout) ndi standard error (stderr).
Kodi stdout mu Linux ndi chiyani?
Kutulutsa kokhazikika, nthawi zina kufupikitsidwa stdout, kumatanthawuza ku mitsinje yokhazikika ya data yomwe imapangidwa ndi mapulogalamu a mzere wolamula (mwachitsanzo, mapulogalamu amtundu uliwonse) mu Linux ndi machitidwe ena opangira Unix. … Pamenepa, imauza lamulo la fayilo kuti liganizire fayilo iliyonse mu bukhuli ngati mkangano.
Kodi stdout ndi chiyani?
Stdout, yomwe imadziwikanso kuti standard output, ndiyo chofotokozera chokhazikika cha fayilo pomwe njira imatha kulemba zotuluka. M'machitidwe opangira a Unix, monga Linux, macOS X, ndi BSD, stdout imatanthauzidwa ndi muyezo wa POSIX. Nambala yake yofotokozera mafayilo ndi 1. Mu terminal, zotuluka zokhazikika zimasintha pazenera la wogwiritsa ntchito.
Kodi stderr command ku Linux ndi chiyani?
Stderr, yemwe amadziwikanso kuti cholakwika chokhazikika, ndi chofotokozera chosasinthika cha fayilo komwe ndondomeko imatha kulemba mauthenga olakwika. M'machitidwe opangira a Unix, monga Linux, macOS X, ndi BSD, stderr imatanthauzidwa ndi muyezo wa POSIX. … Mu terminal, muyezo zolakwika kusasintha kwa wosuta a zenera.
Kodi ndimatsogolera bwanji stderr?
Kuti muwongolerenso stderr, muli ndi zisankho zingapo:
- Sinthani stdout ku fayilo imodzi ndikupita ku fayilo ina: lamulo> kunja 2> zolakwika.
- Lozeraninso stdout ku fayilo ( >out ), ndikulozeranso stderr ku stdout ( 2>&1 ): lamulo > out 2>&1.
Kodi stdout imaphatikizapo stderr?
Ngati kumvetsetsa kwanga kuli kolondola, stdin ndi fayilo yomwe pulogalamu imalemba pazopempha zake kuti igwire ntchitoyo, stdout ndi fayilo yomwe kernel imalembamo zomwe kernel imalembamo ndi njira yomwe ikupempha kuti ipeze zambiri kuchokera, ndipo stderr ndi fayilo yomwe zopatula zonse zimalowetsedwamo.
Kodi ndimapeza bwanji stderr ku Linux?
Nthawi zambiri, STDOUT ndi STDERR zonse zimatuluka ku terminal yanu. Koma ndizotheka kuwongolera zonse ziwiri. Mwachitsanzo, zomwe zimatumizidwa ku STDERR ndi CGI script nthawi zambiri zimathera mu fayilo ya chipika yotchulidwa pamasinthidwe a seva. Ndizotheka pulogalamu kuti mudziwe zambiri za STDERR pa linux system.
Kodi kugwiritsa ntchito & mu Linux ndi chiyani?
The & zimapangitsa kuti lamulo liziyenda chakumbuyo. Kuchokera man bash : Ngati lamulo lithetsedwa ndi woyang'anira &, chipolopolocho chimapereka lamulo kumbuyo mu subshell. Chipolopolo sichimadikirira kuti lamulo lithe, ndipo mawonekedwe obwerera ndi 0.
Kodi stdout ikupita kuti ku Linux?
Standard output, monga idapangidwa panthawi yopanga ndondomeko, amapita ku console, terminal yanu kapena X terminal. Ndendende kumene zotuluka zimatumizidwa momveka bwino zimatengera komwe ndondomekoyi idayambira. [ti]khoza kuyika fayiloyo, mwachisawawa, ku zotsatira zathu zokhazikika monga console yathu kapena skrini yotsiriza.
Kodi printf amalembera stdout?
Kuyitanira kulikonse printf nditero sindikiza ku stdout, pamene kuyitana kuti fprint pamene kusindikiza ku mtsinje wotchulidwa. Mu Mwachitsanzo mukapereka, kuyitana kwachiwiri kudzatero kusindikiza ku stder. Popeza mukusindikiza chingwe chopanda kanthu, simukhala mukuchita chilichonse pamtsinje uliwonse, kotero simudzawona chilichonse chikuchitika.
Kodi mungalembere stdout?
Mukadzipereka kutumiza zotuluka ku stdout , mukusiyira wogwiritsa ntchito kuti asankhe komwe zotulukazo zipite. Ngati mugwiritsa ntchito printf(…) (kapena chofanana ndi fprintf(stdout, …) ), mukutumiza zotulukazo ku stdout , koma komwe kumathera kungadalire momwe ndikufunira pulogalamu yanu.
Kodi stdout yasungidwa?
stdout ndi basi chogwirira cha fayilo kuti mwachisawawa imalumikizidwa ndi kontrakitala, koma ikhoza kutumizidwanso.