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getrlimit

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Version: 2005-09-20 (openSuse - 09/10/07)

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getrlimit, setrlimit - »ñ¸»¤ÎÀ©¸Â¤ò¼èÆÀ/ÀßÄê¤¹¤ë

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#include <sys/time.h>
#include <sys/resource.h>

int getrlimit(int resource, struct rlimit *rlim);
int setrlimit(int resource, const struct rlimit *rlim);

ÀâÌÀ

getrlimit() ¤È setrlimit() ¤Ï¤½¤ì¤¾¤ì»ñ¸» (resource) ¤ÎÀ©¸Â (limit) ¤ÎÀßÄê¤È¼èÆÀ¤ò¹Ô¤¦¡£ ³Æ¥ê¥½¡¼¥¹¤Ë¤Ï¡¢¤½¤ì¤ËÂÐ±þ¤¹¤ë¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤È¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤¬¤¢¤ë¡£ ¥ê¥ß¥Ã¥È¤Ï (getrlimit() ¤È setrlimit() ¤Î rlim °ú¤¿ô¤Ç¤¢¤ë) rlimit ¹½Â¤ÂÎ¤ÇÄêµÁ¤µ¤ì¤ë:


struct rlimit {

    rlim_t rlim_cur;  /* ¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È */

    rlim_t rlim_max;  /* ¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È

                         (rlim_cur ¤è¤ê¾®¤µ¤¯¤Ê¤¤) */

};

ÃÍ RLIM_INFINITY ¤Ï¥ê¥½¡¼¥¹¤ËÀ©¸Â¤¬¤Ê¤¤¤³¤È¤òÉ½¤¹ (¤³¤ÎÃÍ¤Ï getrlimit() ¤¬ÊÖ¤¹¹½Â¤ÂÎ¤È setrlimit() ¤ËÅÏ¤¹¹½Â¤ÂÎ¤ÎÎ¾Êý¤Ç»ÈÍÑ¤µ¤ì¤ë)¡£

resource ¤Ï¼¡¤Î¤¤¤º¤ì¤« 1 ¤Ä¤Ç¤¢¤ë¡£

RLIMIT_AS

¥×¥í¥»¥¹¤Î²¾ÁÛ¥á¥â¥ê (¥¢¥É¥ì¥¹¶õ´Ö) ¤ÎºÇÂç¥µ¥¤¥º (¥Ð¥¤¥ÈÃ±°Ì)¡£ ¤³¤ÎÀ©¸Â¤Ï brk(2), mmap(2), mremap(2) ¤Î¸Æ¤Ó½Ð¤·¤Ë±Æ¶Á¤·¡¢¤³¤ÎÀ©¸Â¤òÄ¶¤¨¤¿¾ì¹ç¤Ï ¥¨¥é¡¼ ENOMEM ¤Ç¼ºÇÔ¤¹¤ë¡£ ¤Þ¤¿¼«Æ°Åª¤Ê¥¹¥¿¥Ã¥¯³ÈÄ¥¤Ë¤â¼ºÇÔ¤¹¤ë (¤µ¤é¤Ë sigaltstack(2) ¤ò»È¤Ã¤¿ÂåÂØ¥¹¥¿¥Ã¥¯¤òÍøÍÑ²ÄÇ½¤Ë¤·¤Æ¤¤¤Ê¤«¤Ã¤¿¾ì¹ç¤Ë¤Ï¡¢ SIGSEGV ¤òÀ¸À®¤·¤Æ¤½¤Î¥×¥í¥»¥¹¤ò kill ¤¹¤ë)¡£ ¤³¤ÎÃÍ¤Ï long ·¿¤Ê¤Î¤Ç¡¢32 ¥Ó¥Ã¥È¤Î long ·¿¤ò»ý¤Ä¥Þ¥·¥ó¤Ç¤Ï¡¢ ¤³¤ÎÀ©¸Â¤ÏºÇÂç¤Ç 2 GiB ¤Ë¤Ê¤ë¤«¡¢¤³¤Î»ñ¸»¤¬ÌµÀ©¸Â¤Ë¤Ê¤ë¡£

RLIMIT_CORE

core ¥Õ¥¡¥¤¥ë¤ÎºÇÂç¥µ¥¤¥º¡£ 0 ¤Î¾ì¹ç¡¢core ¥Õ¥¡¥¤¥ë¤ÏÀ¸À®¤µ¤ì¤Ê¤¤¡£ 0 °Ê³°¤Î¾ì¹ç¡¢¤³¤Î¥µ¥¤¥º¤è¤êÂç¤¤¤¥À¥ó¥×¤ÏÀÚ¤êµÍ¤á¤é¤ì¤ë¡£

RLIMIT_CPU

CPU »þ´Ö¤Î¾å¸Â (ÉÃ¿ô)¡£ ¥×¥í¥»¥¹¤¬¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤ËÃ£¤·¤¿¾ì¹ç¤Ë¡¢ SIGXCPU ¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£ ¤³¤Î¥·¥°¥Ê¥ë¤ËÂÐ¤¹¤ë¥Ç¥Õ¥©¥ë¥È¤ÎÆ°ºî¤Ï¡¢¥×¥í¥»¥¹¤Î½ªÎ»¤Ç¤¢¤ë¡£ ¤¿¤À¤·¥·¥°¥Ê¥ë¤ò¥¥ã¥Ã¥Á¤·¤Æ¡¢¥Ï¥ó¥É¥é¤¬¥á¥¤¥ó¥×¥í¥°¥é¥à¤Ë À©¸æ¤òÊÖ¤¹¤³¤È¤â¤Ç¤¤ë¡£ ¥×¥í¥»¥¹¤¬ CPU »þ´Ö¤ò»È¤¤Â³¤±¤¿¾ì¹ç¤Ï¡¢ ¥Ï¡¼¥É¥ê¥ß¥Ã¥È¤ËÃ£¤¹¤ë¤Þ¤Ç 1 ÉÃËè¤Ë¥×¥í¥»¥¹¤Ë SIGXCPU ¤òÁ÷¤ê¡¢ ¥Ï¡¼¥É¥ê¥ß¥Ã¥È¤ËÃ£¤¹¤ë¤È SIGKILL ¤òÁ÷¤ë¡£ ¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤òÄ¶²á¤·¤¿¤È¤¤ÎÆ°ºî¤Ï¡¢ Linux 2.2 ¤È 2.4 ¤Î¤â¤Î¤Ç¤¢¤ë¡£ ¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤òÄ¶¤¨¤Æ CPU »þ´Ö¤ò»È¤¤Â³¤±¤ë¥×¥í¥»¥¹¤Î °·¤¤Êý¤Ë¤Ä¤¤¤Æ¤Î¼ÂÁõ¤ÏÊÑ²½¤·¤Æ¤¤Æ¤¤¤ë¡£ ¤³¤Î¥·¥°¥Ê¥ë¤ò¥¥ã¥Ã¥Á¤¹¤ëÉ¬Í×¤Î¤¢¤ë °Ü¿¢À¤ò¹Í¤¨¤¿¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤Ç¤Ï¡¢ ºÇ½é¤Ë SIGXCPU ¤ò¼õ¤±¼è¤Ã¤¿»þÅÀ¤ÇÀµ¤·¤¯½ªÎ»¤¹¤Ù¤¤Ç¤¢¤ë¡£

RLIMIT_DATA

¥×¥í¥»¥¹¤Î¥Ç¡¼¥¿¥»¥°¥á¥ó¥È (½é´ü²½¤µ¤ì¤¿¥Ç¡¼¥¿¡¦½é´ü²½¤µ¤ì¤Æ¤¤¤Ê¤¤¥Ç¡¼¥¿¡¦¥Ò¡¼¥×) ¤ÎºÇÂçÃÍ¡£ ¤³¤Î¥ê¥ß¥Ã¥È¤Ï brk(2) ¤È sbrk(2) ¤Î¸Æ¤Ó½Ð¤·¤Ë±Æ¶Á¤¹¤ë¡£ ¤³¤ì¤é¤Î´Ø¿ô¤Ï¡¢¤³¤Î¥ê¥½¡¼¥¹¤Î¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤ËÃ£¤¹¤ë¤È¡¢ ¥¨¥é¡¼ ENOMEM ¤Ç¼ºÇÔ¤¹¤ë¡£

RLIMIT_FSIZE

¥×¥í¥»¥¹¤¬ºîÀ®¤Ç¤¤ë¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤ÎºÇÂçÃÍ¡£ ¤³¤Î¥µ¥¤¥º¤òÄ¶¤¨¤Æ¥Õ¥¡¥¤¥ë¤ò³ÈÄ¥¤¹¤ë¤È¡¢ SIGXFSZ ¥·¥°¥Ê¥ë¤òÁ÷¤ë¡£ ¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢¤³¤Î¥·¥°¥Ê¥ë¤Ï¥×¥í¥»¥¹¤ò½ªÎ»¤¹¤ë¡£ ¥×¥í¥»¥¹¤ò¥¥ã¥Ã¥Á¤¹¤ë¤³¤È¤â¤Ç¤¤ë¤¬¡¢ ´ØÏ¢¤¹¤ë¥·¥¹¥Æ¥à¥³¡¼¥ë (write(2), truncate(2) ¤Ê¤É) ¤Ï¥¨¥é¡¼ EFBIG ¤Ç¼ºÇÔ¤¹¤ë¡£

RLIMIT_LOCKS (½é´ü¤Î Linux 2.4 ¤Î¤ß)

¤³¤Î¥×¥í¥»¥¹¤¬¼Â¹Ô¤Ç¤¤ë flock(2) ¥í¥Ã¥¯¿ô¤È fcntl(2) ¥ê¡¼¥¹¿ô¤Î¹ç·×ÃÍ¤òÀ©¸Â¤¹¤ë¡£

RLIMIT_MEMLOCK

RAM Æâ¤Ë¥í¥Ã¥¯¤Ç¤¤ë¥á¥â¥ê¤ÎºÇÂç¥Ð¥¤¥È¿ô¡£ ¼ÂºÝ¤Ë¤Ï¡¢¤³¤ÎÀ©¸Â¤Ï¥·¥¹¥Æ¥à¥Ú¡¼¥¸¥µ¥¤¥º¤ÎºÇ¤â¶á¤¤ÇÜ¿ô¤Ë ÀÚ¤ê¼Î¤Æ¤Æ´Ý¤á¤é¤ì¤ë¡£ ¤³¤ÎÀ©¸Â¤Ï mlock(2), mlockall(2), mmap(2) ¤Î MAP_LOCKED Áàºî¤Ë±Æ¶Á¤¹¤ë¡£ Linux 2.6.9 °Ê¹ß¤Ç¤Ï shmctl(2) SHM_LOCK Áàºî¤Ë¤â±Æ¶Á¤¹¤ë¡£ ¤³¤ÎÁàºî¤Ï¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â (real) ¥æ¡¼¥¶¡¼ ID ¤Ë¥í¥Ã¥¯¤µ¤ì¤ë ¶¦Í¥á¥â¥ê¥»¥°¥á¥ó¥È (shmget(2) ¤ò»²¾È) ¤Î¹ç·×¥Ð¥¤¥È¿ô¤ÎºÇÂçÃÍ¤òÀßÄê¤¹¤ë¡£ shmctl(2) SHM_LOCK ¤Ë¤è¤ë¥í¥Ã¥¯¤Ï¡¢ mlock(2), mlockall(2), mmap(2) ¤Î MAP_LOCKED ¤Ë¤è¤Ã¤Æ³ÎÎ©¤µ¤ì¤ë¥×¥í¥»¥¹Ëè¤Î¥á¥â¥ê¥í¥Ã¥¯¤È¤ÏÊ¬¤±¤Æ¿ô¤¨¤ë¡£ 1 ¤Ä¤Î¥×¥í¥»¥¹¤Ï¤³¤ÎÀ©¸Â¤Þ¤Ç¤Î¥Ð¥¤¥È¤ò¥í¥Ã¥¯¤Ç¤¤ë¡£ ¤³¤ÎÀ©¸Â¤Ë¤Ï 2 ¤Ä¤Î¼ïÎà¤¬¤¢¤ë¡£ 2.6.9 ¤è¤êÁ°¤Î Linux ¥«¡¼¥Í¥ë ¤Ç¤Ï¡¢ ¤³¤ÎÀ©¸Â¤ÏÆÃ¸¢¥×¥í¥»¥¹¤Ë¤è¤Ã¤Æ¥í¥Ã¥¯¤µ¤ì¤ë¥á¥â¥ê¤Î¹ç·×¤òÀ©¸æ¤·¤Æ¤¤¤¿¡£ Linux 2.6.9 °Ê¹ß¤Ç¤Ï¡¢ÆÃ¸¢¥×¥í¥»¥¹¤¬¥í¥Ã¥¯¤¹¤ë¥á¥â¥ê¤Î¹ç·×¤ËÀ©¸Â¤Ï¤Ê¤¯¡¢ Âå¤ï¤ê¤Ë¤³¤ÎÀ©¸Â¤ÏÈóÆÃ¸¢¥×¥í¥»¥¹¤¬¥í¥Ã¥¯¤¹¤ë¥á¥â¥ê¤Î¹ç·×¤Ë Å¬ÍÑ¤µ¤ì¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¡£

RLIMIT_MSGQUEUE (Linux 2.6.8 °Ê¹ß)

¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Î¼Â¥æ¡¼¥¶¡¼ ID ¤ËÂÐ¤·¤Æ¡¢ POSIX ¥á¥Ã¥»¡¼¥¸¥¥å¡¼¤Î¤¿¤á¤Ë³ÎÊÝ¤Ç¤¤ë¥Ð¥¤¥È¿ô¤ÎÀ©¸Â¤ò»ØÄê¤¹¤ë¡£ ¤³¤ÎÀ©¸Â¤Ï mq_open(3) ¤ËÂÐ¤·¤ÆÅ¬ÍÑ¤µ¤ì¤ë¡£ ¥æ¡¼¥¶¤¬ºîÀ®¤·¤¿³Æ¡¹¤Î¥á¥Ã¥»¡¼¥¸¥¥å¡¼¤Î¥Ð¥¤¥È¿ô¤Ï °Ê²¼¤Î¼°¤Ë¤è¤ê·×»»¤µ¤ì¡¢(¤½¤Î¥¥å¡¼¤¬ºï½ü¤µ¤ì¤ë¤Þ¤Ç¤Î´Ö) ¤³¤ÎÀ©¸Â¤Î·×»»ÂÐ¾Ý¤Ë´Þ¤á¤é¤ì¤ë¡£




    bytes = attr.mq_maxmsg * sizeof(struct msg_msg *) +

            attr.mq_maxmsg * attr.mq_msgsize

¤³¤³¤Ç attr ¤Ï mq_attr ¹½Â¤ÂÎ¤Ç¤¢¤ê¡¢ mq_open(3) ¤ÎÂè 4 °ú¤¿ô¤È¤·¤Æ»ØÄê¤µ¤ì¤ë¡£

sizeof(struct msg_msg *) (Linux/x86 ¤Ç¤Ï 4 ¥Ð¥¤¥È) ¤ò´Þ¤àºÇ½é¤Î²Ã¿ô¤Ï¡¢ ¥æ¡¼¥¶¡¼¤¬Ä¹¤µ 0 ¤Î¥á¥Ã¥»¡¼¥¸¤òÌµÀ©¸Â¤Ëºî¤ì¤Ê¤¤¤³¤ÈÊÝ¾Ú¤·¤Æ¤¤¤ë (¤³¤Î¤è¤¦¤Ê¥á¥Ã¥»¡¼¥¸¤Ç¤¢¤Ã¤Æ¤â¡¢ µÏ¿¤Î¤¿¤á¤Î¥ª¡¼¥Ð¡¼¥Ø¥Ã¥É¤Ç¥·¥¹¥Æ¥à¥á¥â¥ê¤ò¾ÃÈñ¤¹¤ë)¡£

RLIMIT_NICE (¥«¡¼¥Í¥ë 2.6.12 °Ê¹ß, ²¼µ¤Î¡Ö¥Ð¥°¡×¤ÎÀá¤â»²¾È)

setpriority(2) ¤ä nice(2) ¤ò»È¤Ã¤Æ°ú¤¾å¤²¤é¤ì¤ë¥×¥í¥»¥¹¤Î nice ÃÍ¤Î¾å¸Â¤ò»ØÄê¤¹¤ë¡£ nice ÃÍ¤Î¼ÂºÝ¤Î¾å¸Â¤Ï 20 - rlim_cur ¤Ç·×»»¤µ¤ì¤ë (¤³¤Î¤è¤¦¤ÊÊÑ¤Ê¾õ¶·¤Ï¡¢¥ê¥½¡¼¥¹À©¸ÂÃÍ¤È¤·¤ÆÉé¤Î¿ô¤ò»ØÄê¤Ç¤¤Ê¤¤¤¿¤á È¯À¸¤¹¤ë¡£ÄÌ¾ï¡¢Éé¤ÎÃÍ¤ÏÆÃÊÌ¤Ê°ÕÌ£¤ò»ý¤Ã¤Æ¤¤¤ë¤«¤é¤Ç¤¢¤ë¡£ Îã¤¨¤Ð¡¢ÄÌ¾ï¤Ï RLIM_INFINITY ¤ÎÃÍ¤Ï -1 ¤Ç¤¢¤ë)¡£

RLIMIT_NOFILE

¤³¤Î¥×¥í¥»¥¹¤¬¥ª¡¼¥×¥ó¤Ç¤¤ë¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¿ô¤ÎºÇÂçÃÍ¤è¤ê 1 Âç¤¤¤ÃÍ¤ò»ØÄê¤¹¤ë¡£ (open(2), pipe(2), dup(2) ¤Ê¤É¤Ë¤è¤ê) ¤³¤Î¾å¸Â¤òÄ¶¤¨¤è¤¦¤È¤·¤¿¾ì¹ç¡¢¥¨¥é¡¼ EMFILE ¤¬È¯À¸¤¹¤ë¡£

RLIMIT_NPROC

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RLIMIT_RSS

¥×¥í¥»¥¹¤Î resident set (RAM ¾å¤ËÂ¸ºß¤¹¤ë²¾ÁÛ¥Ú¡¼¥¸¤Î¿ô) ¤Î ¾å¸Â¤ò (¥Ú¡¼¥¸¿ô¤Ç) »ØÄê¤¹¤ë¡£ ¤³¤ÎÀ©¸Â¤Ï 2.4.30 ¤è¤êÁ°¤Ç¤·¤«±Æ¶Á¤¬¤Ê¤¯¡¢ madvise(2) ¤Ë MADV_WILLNEED ¤ò»ØÄê¤·¤¿´Ø¿ô¥³¡¼¥ë¤Ë¤·¤«±Æ¶Á¤·¤Ê¤¤¡£

RLIMIT_RTPRIO (Linux 2.6.12 °Ê¹ß, ¥Ð¥°¤ÎÀá¤â»²¾È)

sched_setscheduler(2) ¤ä sched_setparam(2) ¤ò»È¤Ã¤ÆÀßÄê¤Ç¤¤ë¡¢¤½¤Î¥×¥í¥»¥¹¤Î¥ê¥¢¥ë¥¿¥¤¥àÍ¥ÀèÅÙ¤Î¾å¸Â¤ò»ØÄê¤¹¤ë¡£

RLIMIT_SIGPENDING (Linux 2.6.8 °Ê¹ß)

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RLIMIT_STACK

¥×¥í¥»¥¹¡¦¥¹¥¿¥Ã¥¯¤ÎºÇÂç¥µ¥¤¥º¤ò¥Ð¥¤¥ÈÃ±°Ì¤Ç»ØÄê¤¹¤ë¡£ ¤³¤Î¾å¸Â¤ËÃ£¤¹¤ë¤È¡¢ SIGSEGV ¥·¥°¥Ê¥ë¤¬À¸À®¤µ¤ì¤ë¡£ ¤³¤Î¥·¥°¥Ê¥ë¤ò°·¤¦¤¿¤á¤Ë¤Ï¡¢ ¥×¥í¥»¥¹¤ÏÂå¤ê¤Î¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯ (sigaltstack(2)) ¤ò»ÈÍÑ¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

RLIMIT_OFILE ¤Ï RLIMIT_NOFILE ¤Î BSD ¤Ç¤ÎÌ¾Á°¤Ç¤¢¤ë¡£

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EFAULT: rlim ¤¬¥¢¥¯¥»¥¹²ÄÇ½¤Ê¥¢¥É¥ì¥¹¶õ´Ö¤Î³°¤ò»Ø¤·¤Æ¤¤¤ë¡£
EINVAL: resource ¤¬Í¸ú¤Ç¤Ê¤¤¡£ ¤Þ¤¿¤Ï¡¢ setrlimit() ¤Ç¡¢ rlim->rlim_cur ¤¬ rlim->rlim_max ¤è¤ê¤âÂç¤¤«¤Ã¤¿¡£
EPERM: ÆÃ¸¢¤Î¤Ê¤¤¥×¥í¥»¥¹¤¬ setrlimit() ¤ò»ÈÍÑ¤·¤Æ ¥½¥Õ¥È¡¦¥ê¥ß¥Ã¥È¤Þ¤¿¤Ï¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤ò ¸½ºß¤Î¥Ï¡¼¥É¡¦¥ê¥ß¥Ã¥È¤è¤êÂç¤¤¯¤·¤è¤¦¤È»î¤ß¤¿¡£ ¤³¤ì¤ò¹Ô¤¦¤¿¤á¤Ë¤Ï CAP_SYS_RESOURCE ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤¬É¬Í×¤Ç¤¢¤ë¡£ ¤Þ¤¿¤ÏÆÃ¸¢¤Î¤Ê¤¤¥×¥í¥»¥¹¤¬ setrlimit() ¤ò»ÈÍÑ¤·¤Æ ¥½¥Õ¥È¤Þ¤¿¤Ï¥Ï¡¼¥É RLIMIT_NOFILE ¥ê¥ß¥Ã¥È¤ò ¸½ºß¤Î¥«¡¼¥Í¥ë¤ÎºÇÂçÃÍ (NR_OPEN) °Ê¾å¤ËÁý²Ã¤µ¤»¤è¤¦¤È¤·¤¿¡£

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SVr4, 4.3BSD, POSIX.1-2001. RLIMIT_MEMLOCK ¤È RLIMIT_NPROC ¤Ï BSD ¤«¤éÇÉÀ¸¤·¡¢POSIX.1-2001 ¤Ë¤Ï»ØÄê¤µ¤ì¤Æ¤¤¤Ê¤¤¡£ ¤³¤ì¤é¤Ï BSD ·Ï¤È Linux ¤ËÂ¸ºß¤¹¤ë¤¬¡¢Â¾¤Î¼ÂÁõ¤Ï¾¯¤Ê¤¤¡£ ¤Ï BSD ¤«¤éÇÉÀ¸¤·¡¢POSIX.1-2001 ¤Ë¤Ï»ØÄê¤µ¤ì¤Æ¤¤¤Ê¤¤¡£ ¤½¤ì¤Ë¤â´Ø¤ï¤é¤ºÂ¿¤¯¤Î¼ÂÁõ¤ÇÂ¸ºß¤¹¤ë¡£ RLIMIT_MSGQUEUE, RLIMIT_NICE, RLIMIT_RTPRIO, RLIMIT_SIGPENDING ¤Ï Linux ¸ÇÍ¤Î¤â¤Î¤Ç¤¢¤ë¡£

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fork(2) ¤ÇºîÀ®¤µ¤ì¤¿ºîÀ®¤µ¤ì¤¿»Ò¥×¥í¥»¥¹¤Ï¡¢ ¿Æ¥×¥í¥»¥¹¤Î¥ê¥½¡¼¥¹À©¸Â¤ò·Ñ¾µ¤¹¤ë¡£ execve(2) ¤ÎÁ°¸å¤Ç¥ê¥½¡¼¥¹À©¸Â¤ÏÊÝÂ¸¤µ¤ì¤ë¡£

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°ÊÁ°¤Î Linux ¥«¡¼¥Í¥ë¤Ç¤Ï¡¢¥×¥í¥»¥¹¤¬¥½¥Õ¥È¤Þ¤¿¤Ï¥Ï¡¼¥É RLIMIT_CPU ¥ê¥ß¥Ã¥È¤ËÃ£¤·¤¿¾ì¹ç¤ËÁ÷¤é¤ì¤ë SIGXCPU ¤È SIGKILL ¥·¥°¥Ê¥ë¤¬¡¢ËÜÍèÁ÷¤é¤ì¤ë¤Ù¤»þÅÀ¤Î 1 (CPU) ÉÃ¸å¤ËÁ÷¤é¤ì¤Æ¤·¤Þ¤¦¡£ ¤³¤ì¤Ï¥«¡¼¥Í¥ë 2.6.8 ¤Ç½¤Àµ¤µ¤ì¤¿¡£

2.6.17 ¤è¤êÁ°¤Î 2.6.x ¥«¡¼¥Í¥ë¤Ç¤Ï¡¢ RLIMIT_CPU ¥ê¥ß¥Ã¥È¤¬ 0 ¤Î¾ì¹ç¡¢ (RLIM_INFINITY ¤ÈÆ±¤¸¤è¤¦¤Ë) ¡ÖÀ©¸Â¤Ê¤·¡×¤È´Ö°ã¤Ã¤Æ²ò¼á¤µ¤ì¤Æ¤¤¤¿¡£ ¥«¡¼¥Í¥ë 2.6.17 °Ê¹ß¤Ç¤Ï¡¢¥ê¥ß¥Ã¥È¤ò 0 ¤ËÀßÄê¤·¤¿¾ì¹ç¤Ë¤â ¸ú²Ì¤ò»ý¤Ä¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤¬¡¢¼ÂºÝ¤Ë¤Ï¥ê¥ß¥Ã¥È¤ÎÃÍ¤Ï 1 ÉÃ¤È¤Ê¤ë¡£

¥«¡¼¥Í¥ë 2.6.12 ¤Ë¤Ï¡¢ RLIMIT_RTPRIO ¤¬Æ°ºî¤·¤Ê¤¤¤È¤¤¤¦¥Ð¥°¤¬¤¢¤ë¡£¤³¤ÎÌäÂê¤Ï¥«¡¼¥Í¥ë 2.6.13 ¤Ç½¤Àµ¤µ¤ì¤Æ¤¤¤ë¡£

¥«¡¼¥Í¥ë 2.6.12 ¤Ç¤Ï¡¢ getpriority(2) ¤È RLIMIT_NICE ¤¬ÊÖ¤¹Í¥ÀèÅÙ¤ÎÈÏ°Ï¤¬°ì¤Ä¤º¤ì¤Æ¤¤¤¿¡£¤³¤Î¤¿¤á¡¢nice ÃÍ¤Î¼ÂºÝ¤Î¾å¸Â¤¬ 19 - rlim_cur ¤Ë¤Ê¤Ã¤Æ¤·¤Þ¤¦¤È¤¤¤¦±Æ¶Á¤¬¤¢¤Ã¤¿¡£¤³¤ì¤Ï¥«¡¼¥Í¥ë 2.6.13 ¤Ç½¤Àµ¤µ¤ì¤¿¡£

2.4.22 ¤è¤êÁ°¤Î¥«¡¼¥Í¥ë¤Ç¤Ï¡¢ rlim->rlim_cur ¤¬ rlim->rlim_max ¤è¤êÂç¤¤«¤Ã¤¿¾ì¹ç¡¢ setrlimit() ¤Ç¤Î EINVAL ¥¨¥é¡¼¤ò¸¡½Ð¤Ç¤¤Ê¤¤¡£

´ØÏ¢¹àÌÜ

dup(2), fcntl(2), fork(2), getrusage(2), mlock(2), mmap(2), open(2), quotactl(2), sbrk(2), shmctl(2), sigqueue(2), malloc(3), ulimit(3), core(5), capabilities(7), signal(7)

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