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LLSEEK
Section: Linux Programmer's Manual (2)Updated: 10 June 1995
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_llseek - ¥Õ¥¡¥¤¥ë¤ÎÆɤ߽ñ¤¥ª¥Õ¥»¥Ã¥È¤Î°ÌÃÖ¤òÊѤ¨¤ë½ñ¼°
#include <unistd.h>#include <linux/unistd.h>
_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo, loff_t *, res, uint, wh);
int _llseek(unsigned int fd, unsigned long offset_high, unsigned long offset_low, loff_t *result, unsigned int whence);
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_llseek ´Ø¿ô¤Ï¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼ (descriptor) fd ¤Î¥ª¥Õ¥»¥Ã¥È¤Î°ÌÃÖ¤ò whence ¤¬ SEEK_SET, SEEK_CUR, SEEK_END ¤Î¤É¤ì¤Ç¤¢¤ë¤«¤Ë¤è¤Ã¤Æ¡¢¤½¤ì¤¾¤ì ¥Õ¥¡¥¤¥ë¤ÎÀèƬ¡¢¥Õ¥¡¥¤¥ë¤Î¸½ºß°ÌÃÖ¡¢ ¥Õ¥¡¥¤¥ë¤ÎºÇ¸å¤«¤éÁêÂÐŪ¤Ë (offset_high<<32) | offset_low ¥Ð¥¤¥È¤ËÊѹ¹¤¹¤ë¡£ ·ë²Ì¤Î¥Õ¥¡¥¤¥ë°ÌÃÖ¤ò result °ú¤¿ô¤ËÊÖ¤¹¡£ÊÖ¤êÃÍ
À®¸ù¤·¤¿¾ì¹ç¤Ï¡¢ _llseek ¤Ï 0 ¤òÊÖ¤¹¡£¤½¤¦¤Ç¤Ê¤ì¤ÐÃͤȤ·¤Æ -1 ¤òÊÖ¤·¡¢ errno ¤Ë¥¨¥é¡¼¤ò»Ø¼¨¤¹¤ë¡£¥¨¥é¡¼
- EBADF
- fd ¤¬¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼¤Ç¤Ê¤¤¡£
- EINVAL
- whence ¤¬ÉÔÀµ¤Ç¤¢¤ë¡£
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ext2 ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ï 2GB °Ê¾å¤Î¥µ¥¤¥º¤Î¥Õ¥¡¥¤¥ë¤Ï¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤Ê¤¤¡£´ØÏ¢¹àÌÜ
lseek(2)