Linux Certif

Toute la documentation sur la certification Linux LPI

chdir

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chdir, fchdir - ºî¶È¥Ç¥£¥ì¥¯¥È¥ê¤ÎÊѹ¹

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#include <unistd.h>

int chdir(const char *path);
int fchdir(int fd);

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chdir() ¤Ï¡¢¸½ºß¤Îºî¶È¥Ç¥£¥ì¥¯¥È¥ê¤ò path ¤Ë»ØÄꤵ¤ì¤¿¥Ç¥£¥ì¥¯¥È¥ê¤ËÊѹ¹¤¹¤ë¡£

fchdir() ¤Ï¡¢¥Ç¥£¥ì¥¯¥È¥ê¤¬¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼¤È¤·¤Æ »ØÄꤵ¤ì¤ë°Ê³°¤Ï¡¢ chdir() ¤ÈƱ¤¸¤Ç¤¢¤ë¡£

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À®¸ù¤¹¤ë¤È¡¢0 ¤òÊÖ¤¹¡£¼ºÇÔ¤¹¤ë¤È¡¢-1 ¤òÊÖ¤·¡¢ errno ¤ËŬÀÚ¤ÊÃͤò¥»¥Ã¥È¤¹¤ë¡£

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¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ë¤è¤Ã¤Æ¤Ï¾¤Î¥¨¥é¡¼¤¬ÊÖ¤µ¤ì¤ë»ö¤¬¤¢¤ë¡£ chdir() ¤Ç°ìÈÌŪ¤Ê¥¨¥é¡¼¤ò°Ê²¼¤Ëµó¤²¤ë:

EACCES

¥Ñ¥¹Ì¾ path ¤Î¥Ç¥£¥ì¥¯¥È¥ê¤Î¤¤¤º¤ì¤«¤Ë¸¡º÷µö²Ä (search permission) ¤¬¤Ê¤¤ (path_resolution(7) ¤â»²¾È¤¹¤ë¤³¤È)¡£

EFAULT

³ä¤êÅö¤Æ¤é¤ì¤¿¥¢¥É¥ì¥¹¶õ´Ö³°¤ò path ¤¬»Ø¤·¤Æ¤¤¤ë¡£

EIO

I/O ¥¨¥é¡¼¤¬È¯À¸¤·¤¿¡£

ELOOP

path ¤ò²ò·è¤¹¤ëºÝ¤ËÁø¶ø¤·¤¿¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯¤¬Â¿²á¤®¤ë¡£

ENAMETOOLONG

path ¤¬Ä¹²á¤®¤ë¡£

ENOENT

¤½¤Î¥Ç¥£¥ì¥¯¥È¥ê¤Ï¸ºß¤·¤Ê¤¤¡£

ENOMEM

¥«¡¼¥Í¥ë¤Ë½½Ê¬¤Ê¥á¥â¥ê¤¬¤Ê¤¤¡£

ENOTDIR

path ¤Î¹½À®Í×ÁǤ¬¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤Ï¤Ê¤¤¡£

fchdir() ¤Ç°ìÈÌŪ¤Ê¥¨¥é¡¼¤ò°Ê²¼¤Ëµó¤²¤ë:

EACCES

fd ¤ò¥Ç¥£¥ì¥¯¥È¥ê¤È¤·¤Æ¥ª¡¼¥×¥ó¤¹¤ë¤¿¤á¤Î¸¡º÷µö²Ä¤¬¤Ê¤¤¡£

EBADF

fd ¤¬Å¬Àڤʥե¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼¤Ç¤Ê¤¤¡£

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SVr4, 4.4BSD, POSIX.1-2001.

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fork(2) ¤ÇºîÀ®¤µ¤ì¤¿»Ò¥×¥í¥»¥¹¤Ï¡¢¿Æ¥×¥í¥»¥¹¤Î¸½ºß¤Îºî¶È¥Ç¥£¥ì¥¯¥È¥ê¤ò ·Ñ¾µ¤¹¤ë¡£ execve(2) ¤ÎÁ°¸å¤Ç¡¢¸½ºß¤Îºî¶È¥Ç¥£¥ì¥¯¥È¥ê¤ÏÊѹ¹¤µ¤ì¤Ê¤¤¡£

fchdir() ¤Î¥×¥í¥È¥¿¥¤¥×¤¬Í­¸ú¤Ë¤Ê¤ë¤Î¤Ï¡¢ _BSD_SOURCE ¤òÄêµÁ¤·¤¿¾ì¹ç¤«¡¢ _XOPEN_SOURCE ¤òÃÍ 500 ¤ÇÄêµÁ¤·¤¿¾ì¹ç¤Î¤ß¤Ç¤¢¤ë¡£

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chroot(2), getcwd(3), path_resolution(7)