CHMOD

̾Á°

½ñ¼°

int chmod(const char *path, mode_t mode);
int fchmod(int fildes, mode_t mode);  

ÀâÌÀ

¥â¡¼¥É¤Ï¡¢¼¡¤Î³Æ¥â¡¼¥É¤Î or ¤ò¤È¤Ã¤¿¤â¤Î¤Ç»ØÄꤹ¤ë:

S_ISUID

04000 ¼Â¹Ô»þ¤Î¥»¥Ã¥È¡¦¥æ¡¼¥¶¡¼¡¦ID (set user ID)

S_ISGID

02000 ¼Â¹Ô»þ¤Î¥»¥Ã¥È¡¦¥°¥ë¡¼¥×¡¦ID (set group ID)

S_ISVTX

01000 ¥¹¥Æ¥£¥Ã¥­¡¼ (sticky) ¥Ó¥Ã¥È

S_IRUSR (S_IREAD)

00400 ½êÍ­¼Ô (owner) ¤Ë¤è¤ëÆɤ߼è¤ê (read)

S_IWUSR (S_IWRITE)

00200 ½êÍ­¼Ô¤Ë¤è¤ë½ñ¤­¹þ¤ß (write)

S_IXUSR (S_IEXEC)

00100 ½êÍ­¼Ô¤Ë¤è¤ë¼Â¹Ô (execute) / ¸¡º÷ (search)

S_IRGRP

00040 ¥°¥ë¡¼¥×¤Ë¤è¤ëÆɤ߼è¤ê

S_IWGRP

00020 ¥°¥ë¡¼¥×¤Ë¤è¤ë½ñ¤­¹þ¤ß

S_IXGRP

00010 ¥°¥ë¡¼¥×¤Ë¤è¤ë¼Â¹Ô / ¸¡º÷

S_IROTH

00004 ¾¿Í (others) ¤Ë¤è¤ëÆɤ߼è¤ê

S_IWOTH

00002 ¾¿Í¤Ë¤è¤ë½ñ¤­¹þ¤ß

S_IXOTH

00001 ¾¿Í¤Ë¤è¤ë¼Â¹Ô / ¸¡º÷

¥×¥í¥»¥¹¤Î¼Â¸ú (effective) UID ¤¬¥¼¥í¤Ç¤¢¤ë¤«¡¢ ¥Õ¥¡¥¤¥ë¤Î½êÍ­¼Ô¤È°ìÃפ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

¤â¤·¥×¥í¥»¥¹¤Î¼Â¸ú UID ¤¬¥¼¥í¤Ç¤Ê¤¯¡¢¥Õ¥¡¥¤¥ë¤Î¥°¥ë¡¼¥× ID ¤¬ ¥×¥í¥»¥¹¤Î¼Â¸ú¥°¥ë¡¼¥× ID ¤Þ¤¿¤ÏÊä½õŪ¤Ê¥°¥ë¡¼¥× ID ¤Ë¥Þ¥Ã¥Á¤·¤Ê¤¤¾ì¹ç¡¢ S_ISGID ¥Ó¥Ã¥È¤Ï¥ª¥Õ¤Ë¤µ¤ì¤ë¤¬¡¢¤³¤ì¤Ë¤è¤Ã¤Æ¥¨¥é¡¼¤¬ÊÖ¤µ¤ì¤ë¤³¤È¤Ï¤Ê¤¤¡£

¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ë¤è¤Ã¤Æ¤Ï¡¢¥Õ¥¡¥¤¥ë¤Î½ñ¤­¹þ¤ß¤ò¹Ô¤¦»þ¤Ë ¥»¥Ã¥È¡¦¥æ¡¼¥¶¡¼ ID ¤È¥»¥Ã¥È¡¦¥°¥ë¡¼¥× ID ¥Ó¥Ã¥È¤È¼Â¹Ô¥Ó¥Ã¥È¤¬ ¥ª¥Õ¤Ë¤µ¤ì¤ë¤³¤È¤¬¤¢¤ë¡£ ¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤ÎÃæ¤Ë¤Ï¡¢¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶¡¼¤À¤±¤¬ ÆÃÊ̤ΰÕÌ£¤ò»ý¤Ä¥¹¥Æ¥£¥Ã¥­¡¼¡¦¥Ó¥Ã¥È¤òÀßÄê¤Ç¤­¤ë¤â¤Î¤¬¤¢¤ë¡£ ¥¹¥Æ¥£¥Ã¥­¡¼¡¦¥Ó¥Ã¥È¤È¥Ç¥£¥ì¥¯¥È¥ê¤ËÂФ¹¤ë ¥»¥Ã¥È¡¦¥æ¡¼¥¶¡¼ (¥°¥ë¡¼¥×)¡¦ID ¥Ó¥Ã¥È¤Ë¤Ä¤¤¤Æ¤Ï¡¢ stat(2) ¤ò¸«¤è¡£

NFS ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¾å¤Ç¤Ï¡¢¥Ñ¡¼¥ß¥Ã¥·¥ç¥ó¤òÀ©¸Â¤¹¤ë¤È¡¢ ´û¤Ë¥ª¡¼¥×¥ó¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ¤¹¤°¤Ë±Æ¶Á¤¬µÚ¤Ö¡£ ¤³¤ì¤Ï¥¢¥¯¥»¥¹À©¸æ¤¬¥µ¡¼¥Ð¡¼¾å¤Ç¹Ô¤ï¤ì¤Æ¤¤¤ë¤¬¡¢ ¥ª¡¼¥×¥ó¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤Ï¥¯¥é¥¤¥¢¥ó¥È¦¤Ç´ÉÍý¤µ¤ì¤Æ¤¤¤ë¤¿¤á¤Ç¤¢¤ë¡£ ¥¯¥é¥¤¥¢¥ó¥È¦¤Ç¥Õ¥¡¥¤¥ë°À­¤Î¥­¥ã¥Ã¥·¥å¤¬Í­¸ú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¾ì¹ç¤Ë¡¢ ¥Ñ¡¼¥ß¥Ã¥·¥ç¥ó¤ÎÀ©¸Â¤ò´Ë¤¯¤¹¤ë¤È¡¢ ¾¤Î¥¯¥é¥¤¥¢¥ó¥È¤Ë¾ðÊó¤¬ÅÁ¤ï¤ë¤Î¤¬ÃÙ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¡£  

ÊÖ¤êÃÍ

¥¨¥é¡¼

EPERM

¼Â¸ú UID ¤¬¥Õ¥¡¥¤¥ë¤Î½êÍ­¼Ô¤È°ìÃפ»¤º¡¢¥¹¡¼¥Ñ¡¼¡¦¥æ¡¼¥¶¡¼¤Ç¤â¤Ê¤¤¡£

EROFS

¥Õ¥¡¥¤¥ë¤¬Æɤ߹þ¤ßÀìÍÑ (read only) ¤Î¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¾å¤Ë¤¢¤ë¡£

EFAULT

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

ENAMETOOLONG

path ¤¬Ä¹²á¤®¤ë¡£

ENOENT

¥Õ¥¡¥¤¥ë¤¬Â¸ºß¤·¤Ê¤¤¡£

ENOMEM

¥«¡¼¥Í¥ë¤Ë½½Ê¬¤Ê¥á¥â¥ê¤¬¤Ê¤¤¡£

ENOTDIR

¥Ñ¥¹Ì¾¤Î¹½À®Í×ÁǤ¬¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤Ï¤Ê¤¤¡£

EACCES

¥Ñ¥¹Ì¾¤Î¹½À®Í×ÁǤ˸¡º÷µö²Ä¤¬¤Ê¤¤¡£

ELOOP

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

EIO

I/O ¥¨¥é¡¼¤¬È¯À¸¤·¤¿¡£

fchmod ¤Ç°ìÈÌŪ¤Ê¥¨¥é¡¼¤òµó¤²¤ë:

EBADF

¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼ fildes ¤¬Í­¸ú¤Ç¤Ê¤¤¡£

EROFS

¾åµ­¤ò»²¾È¡£

EPERM

¾åµ­¤ò»²¾È¡£

EIO

¾åµ­¤ò»²¾È¡£

½àµò

fchmod ¤Ï 4.4BSD, SVr4 ¤È¸ß´¹À­¤¬¤¢¤ë¡£ SVr4 ¤Ë¤Ï EINTR, ENOLINK ¥¨¥é¡¼¾õÂ֤ε­½Ò¤Ï¤Ê¤¤¡£ POSIX ¤Ç¤Ï fchmod ´Ø¿ô¤Ï¾¯¤Ê¤¯¤È¤â _POSIX_MAPPED_FILES ¤È _POSIX_SHARED_MEMORY_OBJECTS ¤Î¤É¤Á¤é¤«¤¬ÄêµÁ¤µ¤ì¤¤¤ëɬÍפ¬¤¢¤ë¡£ ¤½¤·¤Æ ENOSYS ¤È EINVAL ¥¨¥é¡¼¾õÂ֤ˤĤ¤¤Æ¤Îµ­½Ò¤Ï¤¢¤ë¤¬¡¢ EIO ¤Ë¤Ä¤¤¤Æ¤Îµ­½Ò¤Ï¤Ê¤¤¡£

POSIX ¤È X/OPEN ¤Ë¤Ï¥¹¥Æ¥£¥Ã¥­¡¼¡¦¥Ó¥Ã¥È¤Ë¤Ä¤¤¤Æ¤Îµ­½Ò¤Ï¤Ê¤¤¡£  

´ØÏ¢¹àÌÜ

Index

̾Á°

½ñ¼°

ÀâÌÀ

ÊÖ¤êÃÍ

¥¨¥é¡¼

½àµò

´ØÏ¢¹àÌÜ