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posix_fallocate

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#define _XOPEN_SOURCE 600

#include <stdlib.h>



int posix_fallocate(int fd, off_t offset, off_t len);

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´Ø¿ô posix_fallocate() ¤Ï¡¢¥Ç¥£¥¹¥¯¥ê¥×¥¿ fd ¤Ç»²¾È¤µ¤ì¤ë¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ¡¢¥Ç¥£¥¹¥¯¥¹¥Ú¡¼¥¹¤ò³Î¼Â¤Ë³ÎÊݤ¹¤ë¡£ ¥Ç¥£¥¹¥¯¥¹¥Ú¡¼¥¹¤Ï offset ¤«¤é»Ï¤Þ¤ë len ¥Ð¥¤¥È¤ÎÈϰϤΥХ¤¥È¤Ç¤¢¤ë¡£ posix_fallocate() ¤Î¸Æ¤Ó½Ð¤·¤¬À®¸ù¤·¤¿¸å¡¢»ØÄꤵ¤ì¤¿ÈϰϤΥХ¤¥È¤ËÂФ¹¤ë½ñ¤­¹þ¤ß¤Ï¡¢ ¥Ç¥£¥¹¥¯¥¹¥Ú¡¼¥¹¤ÎÉÔ­¤Ç¼ºÇÔ¤·¤Ê¤¤¤³¤È¤¬Êݾڤµ¤ì¤ë¡£

¥Õ¥¡¥¤¥ë¤Î¥µ¥¤¥º¤¬ offset+len ¤è¤ê¾®¤µ¤¤¾ì¹ç¡¢¥Õ¥¡¥¤¥ë¤Ï¤³¤Î¥µ¥¤¥º¤Ë¤Ê¤ë¤è¤¦¤Ë³ÈÂ礵¤ì¤ë¡£ ¤½¤ì°Ê³°¤Î¾ì¹ç¡¢¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤ÏÊѤï¤é¤Ê¤¤¡£

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posix_fallocate() ¤ÏÀ®¸ù¤·¤¿¾ì¹ç¡¢0 ¤òÊÖ¤¹¡£ ¼ºÇÔ¤·¤¿¾ì¹ç¡¢¥¨¥é¡¼ÈÖ¹æ¤òÊÖ¤¹¡£ errno ¤¬ÀßÄꤵ¤ì¤Ê¤¤ÅÀ¤ËÃí°Õ¤¹¤ë¤³¤È¡£

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EBADF

fd ¤¬Í­¸ú¤Ê¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ç¤Ê¤¤¡£ ¤Þ¤¿¤Ï½ñ¤­¹þ¤ßÍѤ˥ª¡¼¥×¥ó¤µ¤ì¤Æ¤¤¤Ê¤¤¡£

EFBIG

offset+len ¤¬ºÇÂç¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤òĶ¤¨¤Æ¤¤¤ë¡£

EINVAL

offset ¤Þ¤¿¤Ï len ¤¬ 0 ¤è¤ê¾®¤µ¤¤¡£

ENODEV

fd ¤¬Ä̾ï¤Î¥Õ¥¡¥¤¥ë¤È¤·¤Æ»²¾È¤µ¤ì¤Æ¤¤¤Ê¤¤¡£

ENOSPC

fd ¤Ç»²¾È¤µ¤ì¤ë¥Õ¥¡¥¤¥ë¤¬Â¸ºß¤¹¤ë¥Ç¥Ð¥¤¥¹¤Ë¡¢½½Ê¬¤Ê¥¹¥Ú¡¼¥¹¤¬»Ä¤Ã¤Æ¤¤¤Ê¤¤¡£

ESPIPE

fd ¤¬¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î¥Ñ¥¤¥×¤ò»²¾È¤·¤Æ¤¤¤ë¡£

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posix_fallocate() ¤Ï glibc 2.1.94 °Ê¹ß¤ÇÍøÍѲÄǽ¤Ç¤¢¤ë¡£

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POSIX.1-2001.

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lseek(2), posix_fadvise(2), feature_test_macros(7)