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getpriority, setpriority — ?ץ??????ॹ?????塼??ͥ?????̤????? / ???ꤹ??

?饤?֥???

Standard C Library (libc, -lc)

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<sys/time.h> <sys/resource.h> int getpriority(int which, int who) int setpriority(int which, int who, int prio)

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which ?????? who ?ǻؼ????????ץ????????ץ????????롼?ס? ?ޤ??ϥ桼???Υ??????塼??ͥ?????̤? getpriority() ?????ƥॳ?????Ǽ??????졢 setpriority() ?????ƥॳ?????????ꤵ???ޤ??? which ?????ϡ? PRIO_PROCESS, PRIO_PGRP ?ޤ??? PRIO_USER ?Τɤ줫?Ǥ??ꡢ who ?? which ?˴?Ϣ???Ʋ??ᤵ???ޤ? (PRIO_PROCESS ?ξ????ϥץ????????̻ҡ? PRIO_PGRP ?ξ????ϥץ????????롼?׼??̻ҡ??????? PRIO_USER ?ξ????ϥ桼?? ID)?? who ???ͤ? 0 ?Ǥ????Τϡ? ???ߤΥץ????????ץ????????롼?ס??ޤ??ϥ桼????ɽ???ޤ??? prio ?????? -20 ???? 20 ???ϰϤ??ͤǤ??? ?ǥե????Ȥ?ͥ?????̤? 0 ?Ǥ??? ͥ?????̤??㤤?ȡ????????塼??Ĵ???ˤϤ????Թ礬?褯?ʤ??ޤ???

getpriority() ?????ƥॳ?????ϡ??????Υץ??????Τ????줫???????????ǹ???ͥ?????̤? ?֤??Ƥ??ޤ? (?Ǥ⾮???????ͤǤ?)?? setpriority() ?????ƥॳ?????ϡ????ꤵ?줿???٤ƤΥץ???????ͥ?????̤????????ͤ????ꤷ?ޤ??? ?????ѥ桼????????ͥ?????̤??㤯?Ǥ??ޤ???

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getpriority() ?Ͻ?????????????λ???Ƥ??? -1 ???֤????Ȥ??????Τǡ? ?ƤӽФ??????˳????ѿ? errno ?򥯥ꥢ???Ƥ??顢???ˤ??????????å????? -1 ?????顼?Ǥ??뤫?? ?ޤ??????????ͤǤ??뤫Ƚ?ꤹ??ɬ?פ??????ޤ???

The setpriority() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

???顼

getpriority() ?? setpriority() ?????ƥॳ?????ϼ??ξ????˼??Ԥ??ޤ?:

[ESRCH]

???ꤵ?줿 which ?? who ???ͤ????Ѥ??Ƥ????ץ??????????Ĥ????ޤ????Ǥ?????

[EINVAL]

which ?????? PRIO_PROCESS, PRIO_PGRP ?ޤ??? PRIO_USER ?Τɤ??Ǥ⤢???ޤ????Ǥ?????

?嵭?Υ??顼?????Ǥʤ??? setpriority() ?ϼ??ξ????˼??Ԥ??ޤ?:

[EPERM]

?ץ??????ϸ??Ф??줿???ΤΡ????μ¸? ID ???¥桼?? ID ?? ?ɤ????⡢?ƤӽФ?¦?μ¸??桼?? ID ?˰??פ??ޤ????Ǥ?????

[EACCES]

?????ѥ桼???Ǥʤ????Τ??ץ???????ͥ?????̤򲼤??褦?Ȥ??ޤ?????

??Ϣ????

nice(1), fork(2), renice(8)

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getpriority() ?????ƥॳ?????? 4.2BSD ?ǤϤ??????о줷?ޤ?????