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GETRLIMIT
Section: Linux Programmer's Manual (2)Updated: 4 May 2001
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getrlimit, getrusage, setrlimit - »ñ¸»¤Î¸Â³¦¤ä»ÈÍÑÎ̤ò¼èÆÀ/ÀßÄꤹ¤ë½ñ¼°
#include <sys/time.h>#include <sys/resource.h>
#include <unistd.h>
int getrlimit (int resource, struct rlimit *rlim);
int getrusage (int who, struct rusage *usage);
int setrlimit (int resource, const struct rlimit *rlim);
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getrlimit ¤È setrlimit ¤Ï¤½¤ì¤¾¤ì»ñ¸» (resource) ¤Î¸Â³¦ (limit) ¤ÎÀßÄê¤È¼èÆÀ¤ò¹Ô¤Ê¤¦¡£ resource ¤Ï°Ê²¼¤Î¤É¤ì¤«¤Ç¤¢¤ë:
RLIMIT_CPU /* CPU time in seconds */
RLIMIT_FSIZE /* Maximum filesize */
RLIMIT_DATA /* max data size */
RLIMIT_STACK /* max stack size */
RLIMIT_CORE /* max core file size */
RLIMIT_RSS /* max resident set size */
RLIMIT_NPROC /* max number of processes */
RLIMIT_NOFILE /* max number of open files */
RLIMIT_MEMLOCK /* max locked-in-memory address space*/
RLIMIT_AS /* address space (virtual memory) limit */
¸Â³¦¤ò RLIM_INFINITY ¤ËÀßÄꤷ¤¿¾ì¹ç¡¢»ñ¸»¤ò¸Â³¦Ìµ¤· (unlimited) ¤Ë¤Ç¤¤ë¡£ RLIMIT_OFILE ¤Ï RLIMIT_NOFILE ¤Î BSD ¤Ë¤ª¤±¤ë̾Á°¤Ç¤¢¤ë¡£
rlimit ¤Ï°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤ë¹½Â¤ÂΤǤ¢¤ë:
struct rlimit {
rlim_t rlim_cur;
rlim_t rlim_max;
};
getrusage ¤Ï¸½ºß¤Î»ñ¸»¤Î»ÈÍÑÎÌ (usage) ¤òÊÖ¤¹¡£ who ¤Ë¤Ï RUSAGE_SELF ¤« RUSAGE_CHILDREN ¤Î¤É¤Á¤é¤«¤ò»ØÄꤹ¤ë¡£
struct rusage {
struct timeval ru_utime; /* user time used */
struct timeval ru_stime; /* system time used */
long ru_maxrss; /* maximum resident set size */
long ru_ixrss; /* integral shared memory size */
long ru_idrss; /* integral unshared data size */
long ru_isrss; /* integral unshared stack size */
long ru_minflt; /* page reclaims */
long ru_majflt; /* page faults */
long ru_nswap; /* swaps */
long ru_inblock; /* block input operations */
long ru_oublock; /* block output operations */
long ru_msgsnd; /* messages sent */
long ru_msgrcv; /* messages received */
long ru_nsignals; /* signals received */
long ru_nvcsw; /* voluntary context switches */
long ru_nivcsw; /* involuntary context switches */
};
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À®¸ù¤·¤¿¾ì¹ç¤Ï¥¼¥í¤¬ÊÖ¤µ¤ì¤ë¡£¥¨¥é¡¼¤Î¾ì¹ç¤Ï -1 ¤¬ÊÖ¤µ¤ì¡¢ errno ¤ËŬÀÚ¤ÊÃͤ¬ÀßÄꤵ¤ì¤ë¡£¥¨¥é¡¼
- EFAULT
- rlim ¤Þ¤¿¤Ï usage ¤¬¥¢¥¯¥»¥¹²Äǽ¤Ê¥¢¥É¥ì¥¹¶õ´Ö¤Î³°¤ò»Ø¤·¤Æ¤¤¤ë¡£
- EINVAL
- getrlimit ¤Þ¤¿¤Ï setrlimit ¤¬ÉÔÀµ¤Ê resource ¤Ç¸Æ¤Ó½Ð¤µ¤ì¤¿¤«¡¢getrusage ¤¬ÉÔÀµ¤Ê who ¤Ç¸Æ¤Ó½Ð¤µ¤ì¤¿¡£
- EPERM
- ¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶¡¼°Ê³°¤¬ setrlimit() ¤ò»ÈÍѤ·¤Æ ¥½¥Õ¥È¤Þ¤¿¤Ï¥Ï¡¼¥É¤Î¸Â³¦¤ò¸½ºß¤Î¥Ï¡¼¥É¤Î¸Â³¦°Ê¾å¤Ë¤·¤è¤¦¤È»î¤ß¤¿¡£ ¤Þ¤¿¤Ï¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶¡¼¤¬ RLIMIT_NOFILE ¤ò ¸½ºß¤Î¥«¡¼¥Í¥ë¤ÎºÇÂçÃͰʾå¤ËÁý²Ã¤µ¤»¤è¤¦¤È¤·¤¿¡£
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SVr4, BSD 4.3Ãí°Õ
¾åµ¤Î¹½Â¤ÂÎ¤Ï BSD 4.3 Reno ¤Î¤â¤Î¤òºÎÍѤ·¤¿¡£ Linux ¤Ç¤ÏÁ´¤Æ¤Î¥Õ¥£¡¼¥ë¥É¤¬°ÕÌ£¤ò»ý¤Ä¤È¤¤¤¦¤ï¤±¤Ç¤Ï¤Ê¤¤¡£ ¸½ºß¤Î¤È¤³¤í (Linux 2.4 ¤Ç¤Ï)¡¢¥Õ¥£¡¼¥ë¥É ru_utime, ru_stime, ru_minflt, ru_majflt, ru_nswap ¤Î¤ß¤¬´ÉÍý¤µ¤ì¤Æ¤¤¤ë¡£´ØÏ¢¹àÌÜ
quotactl(2), ulimit(3)