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Version: 2004-06-23 (openSuse - 09/10/07)

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Section: 2 (Appels système)

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link - ¥Õ¥¡¥¤¥ë¤Î¿·¤·¤¤Ì¾Á°¤òºîÀ®¤¹¤ë

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#include <unistd.h>

int link(const char *oldpath, const char *newpath);

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link() ¤Ï¸ºß¤¹¤ë¥Õ¥¡¥¤¥ë¤Ø¤Î¿·¤·¤¤¥ê¥ó¥¯ (link) (¥Ï¡¼¥É¡¦¥ê¥ó¥¯ (hard link) ¤È¤â¤¤¤¦) ¤òºîÀ®¤¹¤ë¡£

newpath ¤¬Â¸ºß¤¹¤ë¾ì¹ç¤Ë¤Ï¾å½ñ¤­¤Ï¤µ¤ì¤Ê¤¤¡£

¤³¤Î¿·¤·¤¤Ì¾Á°¤ÏÁ´¤Æ¤ÎÁàºî¤Ë¤ª¤¤¤Æ¸Å¤¤Ì¾Á°¤È´°Á´¤ËƱ¤¸¤è¤¦¤Ë»ÈÍѤµ¤ì¤ë; ξÊý¤Î̾Á°¤ÏƱ¤¸¥Õ¥¡¥¤¥ë¤ò»²¾È¤·¤Æ¤ª¤ê (¤½¤ì¤ÇƱ¤¸µö²Ä (permission) ¤ä½êÍ­¼Ô (ownership) ¤È¤Ê¤ë¤Î¤Ç)¡¢ ¤É¤Á¤é¤Î̾Á°¤¬¡ÖËÜÍè¡×¤Î¤â¤Î¤Ç¤¢¤ë¤«È½Ê̤Ǥ­¤Ê¤¤¡£

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À®¸ù¤·¤¿¾ì¹ç¤Ï 0 ¤¬ÊÖ¤µ¤ì¤ë¡£¥¨¥é¡¼¤Î¾ì¹ç¤Ï -1 ¤¬ÊÖ¤µ¤ì¡¢ errno ¤¬Å¬ÀÚ¤ËÀßÄꤵ¤ì¤ë¡£

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EACCES
newpath ¤ò´Þ¤ó¤Ç¤¤¤ë¥Ç¥£¥ì¥¯¥È¥ê¤Ø¤Î½ñ¤­¹þ¤ß¤¬µö¤µ¤ì¤Æ¤¤¤Ê¤¤¤«¡¢ oldpath ¤Þ¤¿¤Ï newpath ¤Ø¤Î¥Ç¥£¥ì¥¯¥È¥ê¤Î¤É¤ì¤«¤Ë¸¡º÷µö²Ä¤¬¤Ê¤¤ (path_resolution(7) ¤ò»²¾È)¡£
EEXIST
newpath ¤¬´û¤Ë¸ºß¤¹¤ë¡£
EFAULT
oldpath ¤Þ¤¿¤Ï newpath ¤¬¥¢¥¯¥»¥¹²Äǽ¤Ê¥¢¥É¥ì¥¹¶õ´Ö¤Î³°¤ò»Ø¤·¤Æ¤¤¤ë¡£
EIO
I/O ¥¨¥é¡¼¤¬È¯À¸¤·¤¿¡£
ELOOP
oldpath ¤Þ¤¿¤Ï newpath ¤ò²ò·è¤¹¤ëºÝ¤ËÁø¶ø¤·¤¿¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤¬Â¿²á¤®¤ë¡£
EMLINK
oldpath ¤Ë¤è¤Ã¤Æ»²¾È¤µ¤ì¤ë¥Õ¥¡¥¤¥ë¤Ï ´û¤ËºÇÂç¿ô¤Þ¤Ç¤Î¥ê¥ó¥¯¤ò»ý¤Ã¤Æ¤¤¤ë¡£
ENAMETOOLONG
oldpath ¤Þ¤¿¤Ï newpath ¤¬Ä¹²á¤®¤ë¡£
ENOENT
oldpath ¤Þ¤¿¤Ï newpath ¤Î¥Ç¥£¥ì¥¯¥È¥êÉôʬ¤¬Â¸ºß¤·¤Ê¤¤¤«¡¢ ²õ¤ì¤¿(dangling)¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤Ç¤¢¤ë¡£
ENOMEM
¥«¡¼¥Í¥ë¤Ë½½Ê¬¤Ê¥á¥â¥ê¤¬¤Ê¤¤¡£
ENOSPC
¤½¤Î¥Õ¥¡¥¤¥ë¤ò´Þ¤ó¤Ç¤¤¤ë¥Ç¥Ð¥¤¥¹¤Ë¿·¤·¤¤¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤ò ºîÀ®¤¹¤ë¤¿¤á¤Î¶õ¤­¤¬¤Ê¤¤¡£
ENOTDIR
oldpath ¤Þ¤¿¤Ï newpath ¤Î¥Ç¥£¥ì¥¯¥È¥êÉôʬ¤¬¡¢¼ÂºÝ¤Ë¤Ï¡¢¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤Ê¤¤¡£
EPERM
oldpath ¤¬¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤¢¤ë¡£
EPERM
oldpath ¤È newpath ¤ò´Þ¤ó¤Ç¤¤¤ë¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤¬¥Ï¡¼¥É¡¦¥ê¥ó¥¯¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤Ê¤¤¡£
EROFS
¥Õ¥¡¥¤¥ë¤¬Æɤ߹þ¤ßÀìÍѤΥե¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ë¸ºß¤¹¤ë¡£
EXDEV
oldpath ¤È newpath ¤¬Æ±¤¸¥Þ¥¦¥ó¥È¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ë¸ºß¤·¤Ê¤¤¡£ (Linux ¤Ï 1 ¤Ä¤Î¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤òÊ£¿ô¤Î¥Þ¥¦¥ó¥È°ÌÃÖ¤Ë ¥Þ¥¦¥ó¥È¤¹¤ë¤³¤È¤òµö²Ä¤·¤Æ¤¤¤ë¡£ ¤·¤«¤· link(2) ¤Ï¡¢¤¿¤È¤¨Æ±¤¸¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ç¤¢¤Ã¤Æ¤â¡¢ ÊÌ¡¹¤Î¥Þ¥¦¥ó¥È°ÌÃÖ¤ò¸Ù¤¤¤Ç¤ÏÆ°ºî¤·¤Ê¤¤¡£)

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SVr4, 4.3BSD, POSIX.1-2001 (²¼µ­¤ÎÃí°ÕÅÀ°Ê³°).

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link() ¤Ç¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤òĶ¤¨¤Æ¥Ï¡¼¥É¡¦¥ê¥ó¥¯¤òºîÀ®¤¹¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£ ¤³¤Î¤è¤¦¤Ê¾ì¹ç¤Ï symlink(2) ¤ò»ÈÍѤ¹¤ë¤³¤È¡£

POSIX.1-2001 ¤Ç¤Ï¡¢ oldpath ¤¬¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤Ç¤¢¤ë¾ì¹ç¡¢ link() ¤Ï oldpath ¤Î»²¾È¤ò²ò·è¤¹¤Ù¤­¤Ç¤¢¤ë¤Èµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡£ ¤·¤«¤·¡¢Linux ¤Ï¤½¤Î¤è¤¦¤Ë¤·¤Æ¤¤¤Ê¤¤¡£ oldpath ¤¬¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤Ç¤¢¤ë¾ì¹ç¡¢ newpath ¤ÏƱ¤¸¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¥Õ¥¡¥¤¥ë¤Ø¤Î (¥Ï¡¼¥É) ¥ê¥ó¥¯¤È¤·¤ÆºîÀ®¤µ¤ì¤ë (¤Ä¤Þ¤ê newpath ¤Ï oldpath ¤¬»²¾È¤·¤Æ¤¤¤¿Æ±¤¸¥Õ¥¡¥¤¥ë¤Ø¤Î¥·¥ó¥Ü¥ê¥Ã¥¯¥ê¥ó¥¯¤Ë¤Ê¤ë)¡£ ¾¤Î¤¤¤¯¤Ä¤«¤Î¼ÂÁõ¤Ç¤â Linux ¤ÈƱ¤¸¤è¤¦¤ËÆ°ºî¤¹¤ë¡£

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NFS ¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ç¤Ï¡¢NFS ¥µ¡¼¥Ð¡¼¤¬¥ê¥ó¥¯¤òºîÀ®¤·¤¿¸å¤Ë¡¢ ¤½¤ì¤òÅÁ¤¨¤ëÁ°¤Ë»à¤ó¤À¾ì¹ç¤Ë¤ÏÊÖ¤êÃͤ¬ÉÔÀµ¤Ê¾ì¹ç¤¬¤¢¤ë¡£ ¥ê¥ó¥¯¤¬ºîÀ®¤Ç¤­¤¿¤«¤É¤¦¤«¸«¤Ä¤±¤ë¤¿¤á¤Ë¤Ï stat(2) ¤ò»ÈÍѤ¹¤ë¤³¤È¡£

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ln(1), linkat(2), open(2), rename(2), stat(2), symlink(2), unlink(2), path_resolution(7)