mount

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Langue: ja

Version: 2004-05-18 (openSuse - 09/10/07)

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Section: 2 (Appels système)

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mount, umount, umount2 - ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ò¥Þ¥¦¥ó¥È/¥¢¥ó¥Þ¥¦¥ó¥È¤¹¤ë

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#include <sys/mount.h>



int mount(const char *source, const char *target,

          const char *filesystemtype, unsigned long mountflags,

          const void *data);



int umount(const char *target);



int umount2(const char *target, int flags);

ÀâÌÀ

mount() ¤Ï source ¤Ç»ØÄꤵ¤ì¤¿¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à (¥Ç¥Ð¥¤¥¹Ì¾¤Ç¤¢¤ë¤³¤È¤¬Â¿¤¤¤¬¡¢ ¥Ç¥£¥ì¥¯¥È¥ê̾¤ä¥À¥ß¡¼¤Î¾ì¹ç¤â¤¢¤ë) ¤ò target ¤Ç»ØÄꤵ¤ì¤¿¥Ç¥£¥ì¥¯¥È¥ê¤Ë·ë¤Ó¤Ä¤±¤ë¡£

umount() ¤È umount2() ¤Ï target ¤Ë¥Þ¥¦¥ó¥È¤µ¤ì¤Æ¤¤¤ë (ºÇ¾å°Ì¤Î) ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ò³°¤¹¡£

¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î¥Þ¥¦¥ó¥È/¥¢¥ó¥Þ¥¦¥ó¥È¤ò¹Ô¤¦¤Ë¤Ï¡¢ ŬÀڤʸ¢¸Â (Linux ¤Ç¤Ï CAP_SYS_ADMIN ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£) ¤¬É¬ÍפǤ¢¤ë¡£

Linux 2.4 °Ê¹ß¡¢¤Ò¤È¤Ä¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤òÊ£¿ô¤Î¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥È¤Ë ·ë¤Ó¤Ä¤±¤ë¤³¤È¤¬¤Ç¤­¡¢Æ±¤¸¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥È¤ËÊ£¿ô¤Î¥Þ¥¦¥ó¥È¤ò¥¹¥¿¥Ã¥¯ ¤µ¤»¤ë¤³¤È¤â¤Ç¤­¤ë¡£

°ú¤­¿ô filesystemtype ¤È¤·¤Æ¥«¡¼¥Í¥ë¤¬Âбþ¤·¤Æ¤¤¤ëÃͤϡ¢ /proc/filesystems ¤Ç»²¾È¤Ç¤­¤ë (Î㤨¤Ð "minix", "ext2", "msdos", "proc", "nfs", "iso9660" Åù)¡£ ŬÀڤʥ⥸¥å¡¼¥ë¤¬Æɤ߹þ¤Þ¤ì¤ë¤È¡¢¤µ¤é¤ËÊ̤ÎÃͤ¬ÍøÍѲÄǽ¤Ë¤Ê¤ë¤«¤â¤·¤ì¤Ê¤¤¡£

°ú¤­¿ô mountflags ¤Ï¡¢ÀèƬ 16 ¥Ó¥Ã¥È¤Ï¥Þ¥¸¥Ã¥¯¥Ê¥ó¥Ð¡¼ 0xC0ED (MS_MGC_VAL) ¤Ç¡¢ »Ä¤ê¤Î 16 ¥Ó¥Ã¥È¤¬¥Þ¥¦¥ó¥È¥Õ¥é¥°¤Ç¤¢¤ë¡£ ¥Þ¥¸¥Ã¥¯¥Ê¥ó¥Ð¡¼¤Ï¡¢¥«¡¼¥Í¥ë¥Ð¡¼¥¸¥ç¥ó 2.4 ¤è¤êÁ°¤Ç¤Ïɬ¿Ü¤Ç¤¢¤Ã¤¿¤¬¡¢ ¸½ºß¤ÏɬÍפʤ¯¡¢»ØÄꤵ¤ì¤Æ¤â̵»ë¤µ¤ì¤ë¡£ ¥Þ¥¦¥ó¥È¥Õ¥é¥°¤Ï libc4 ¤È libc5 ¤Ç¤Ï <linux/fs.h> ¡¢ glibc2 ¤Ç¤Ï <sys/mount.h> ¤ÇÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢°Ê²¼¤ÎÄ̤ê¤Ç¤¢¤ë:

MS_BIND
(Linux 2.4 °Ê¹ß) ¥Ð¥¤¥ó¥É¥Þ¥¦¥ó¥È¤ò¹Ô¤¦¡£¤³¤ì¤Ï¥Õ¥¡¥¤¥ë¤ä¥Ç¥£¥ì¥¯¥È¥ê¤ÎÉôʬÌÚ¤ò ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥àÆâÉô¤ÎÊ̤ξì½ê¤Ç¸«¤¨¤ë¤è¤¦¤Ë¤¹¤ë¤â¤Î¤Ç¤¢¤ë¡£ ¥Ð¥¤¥ó¥É¥Þ¥¦¥ó¥È¤ò»È¤¦¤È¡¢¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ò¤Þ¤¿¤¤¤Ç chroot(2) jail ¤ò¹½À®¤¹¤ë¤³¤È¤¬²Äǽ¤Ë¤Ê¤ë¡£ filesystemtype, mountflags, data °ú¤­¿ô¤Ï̵»ë¤µ¤ì¤ë¡£
MS_DIRSYNC (Linux 2.5.19 °Ê¹ß)
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MS_MANDLOCK
¤³¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ¶¯À©¥í¥Ã¥¯¤òǧ¤á¤ë¡£ (¶¯À©¥í¥Ã¥¯¤òÍ­¸ú¤Ë¤¹¤ë¤Ë¤Ï¡¢ fcntl(2) ¤Ç½Ò¤Ù¤é¤ì¤Æ¤¤¤ëÊýË¡¤Ç¥Õ¥¡¥¤¥ëñ°Ì¤Çµö²Ä¤ò¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤)
MS_MOVE
ÉôʬÌÚ¤ò°ÜÆ°¤¹¤ë¡£ source ¤Ë¤Ï¤¹¤Ç¤Ë¸ºß¤¹¤ë¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥È¤ò»ØÄꤷ¡¢ target ¤Ë¤Ï¿·¤·¤¤¾ì½ê¤ò»ØÄꤹ¤ë¡£ °ÜÆ°¤Ï¥¢¥È¥ß¥Ã¥¯¤Ç¤¢¤ë¡£ Áàºî¤Î¼Â¹ÔÃæ¡¢Éôʬ¥Ä¥ê¡¼¤¬¥¢¥ó¥Þ¥¦¥ó¥È¤µ¤ì¤ë¤³¤È¤Ï¤Ê¤¤¡£ filesystemtype, mountflags, data °ú¤­¿ô¤Ï̵»ë¤µ¤ì¤ë¡£
MS_NOATIME
¤³¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î (Á´¤Æ¤Î¼ïÎà¤Î) ¥Õ¥¡¥¤¥ë¤Î¥¢¥¯¥»¥¹»þ¹ï¤ò¹¹¿·¤·¤Ê¤¤¡£
MS_NODEV
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MS_NODIRATIME
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MS_NOEXEC
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MS_NOSUID
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MS_RDONLY
¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤òÆɤ߹þ¤ßÀìÍѤǥޥ¦¥ó¥È¤¹¤ë¡£
MS_RELATIME(Linux 2.6.20 °Ê¹ß)
¤³¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¾å¤Î¥Õ¥¡¥¤¥ë¤¬¥¢¥¯¥»¥¹¤µ¤ì¤¿ºÝ¡¢ ¤½¤Î¥Õ¥¡¥¤¥ë¤ÎºÇ½ª¥¢¥¯¥»¥¹»þ¹ï (atime) ¤Î¸½ºßÃͤ¬ ºÇ½ª½¤Àµ»þ¹ï (mtime) ¤äºÇ½ª¾õÂÖÊѹ¹»þ¹ï (ctime) ¤È Åù¤·¤¤¤«¾®¤µ¤¤¾ì¹ç¤Ë¤Î¤ß¡¢atime ¤ò¹¹¿·¤¹¤ë¡£ ¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¡¢ mutt(1) ¤Î¤è¤¦¤Ë¡¢ºÇ¸å¤ÎÆâÍƽ¤Àµ°Ê¹ß¤Ë¥Õ¥¡¥¤¥ë¤¬¤¤¤ÄÆɤ߽Фµ¤ì¤¿¤«¤òÃΤë ɬÍפ¬¤¢¤ë¥×¥í¥°¥é¥à¤ÇÍ­ÍѤǤ¢¤ë¡£
MS_REMOUNT
¤¹¤Ç¤Ë¸ºß¤¹¤ë¥Þ¥¦¥ó¥È¤òºÆ¥Þ¥¦¥ó¥È¤¹¤ë¡£ ¤³¤ì¤Ë¤è¤ê¡¢¤¹¤Ç¤Ë¸ºß¤¹¤ë¥Þ¥¦¥ó¥È¤Î mountflags ¤È data ¤ò¡¢°ìÅÙ¥¢¥ó¥Þ¥¦¥ó¥È¤·¤Æ¤«¤éºÆ¥Þ¥¦¥ó¥È¤¹¤ë¤È¤¤¤¦ºî¶È¤ò¤»¤º¤Ë Êѹ¹¤Ç¤­¤ë¡£ source ¤È target ¤ÏºÇ½é¤Î mount() ¸Æ¤Ó½Ð¤·¤ÈƱ¤¸Ãͤò»ØÄꤹ¤ëɬÍפ¬¤¢¤ë¡£ filesystemtype ¤Ï̵»ë¤µ¤ì¤ë¡£

mountflags ¤Î¤¦¤Á MS_RDONLY, MS_SYNCHRONOUS, MS_MANDLOCK ¤ÏÊѹ¹²Äǽ¤Ç¤¢¤ë¡£ ¥«¡¼¥Í¥ë 2.6.16 ¤è¤êÁ°¤Ç¤Ï¡¢ MS_NOATIME, MS_NODIRATIME ¤âÊѹ¹²Äǽ¤Ç¤¢¤Ã¤¿¡£ ¥«¡¼¥Í¥ë 2.4 ¤è¤êÁ°¤Ç¤Ï¡¢¾åµ­¤Ë²Ã¤¨¤Æ¡¢ MS_NOSUID, MS_NODEV, MS_NOEXEC ¤âÊѹ¹²Äǽ¤Ç¤¢¤Ã¤¿¡£

MS_SYNCHRONOUS
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Linux 2.4 °Ê¹ß¤Ç¤Ï¡¢ MS_NODEV, MS_NOEXEC, MS_NOSUID ¤Ï¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥Èñ°Ì¤Ç»ØÄê¤Ç¤­¤ë¡£ ¥«¡¼¥Í¥ë 2.6.16 °Ê¹ß¤Ç¤Ï¡¢ MS_NOATIME ¤È MS_NODIRATIME ¤â¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥Èñ°Ì¤Ç»ØÄê¤Ç¤­¤ë¡£ ¤Þ¤¿¡¢ MS_RELATIME ¥Õ¥é¥°¤â¥Þ¥¦¥ó¥È¥Ý¥¤¥ó¥Èñ°Ì¤ÇÀßÄê¤Ç¤­¤ë¡£

°ú¤­¿ô data ¤¬¤É¤Î¤è¤¦¤Ë²ò¼á¤µ¤ì¤ë¤«¤Ï¡¢¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ë¤è¤Ã¤Æ°Û¤Ê¤ë¡£ ¤¿¤¤¤Æ¤¤¤Ï¡¢»ØÄꤵ¤ì¤¿¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ÇÍøÍѲÄǽ¤Ê¥ª¥×¥·¥ç¥ó¤¬ ¥³¥ó¥Þ¶èÀÚ¤ê¤Çʤ٤é¤ì¤¿Ê¸»úÎó¤Ç¤¢¤ë¡£ ³Æ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ËÂФ·¤Æ»ØÄê²Äǽ¤Ê¥ª¥×¥·¥ç¥ó¤Î¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï mount(8) ¤ò»²¾È¤Î¤³¤È¡£

Linux 2.1.116 ¤«¤é¡¢ umount2() ¥·¥¹¥Æ¥à¥³¡¼¥ë¤¬Äɲ䵤줿¡£¤³¤ì¤Ï umount() ¤ÈƱÍÍ¤Ë target ¤ò¥¢¥ó¥Þ¥¦¥ó¥È¤¹¤ë¤¬¡¢ flags ¤¬Äɲ䵤ì¤Æ¤ª¤ê¡¢Áàºî¤ÎºÝ¤Î¿¶¤ëÉñ¤¤¤òÀ©¸æ¤Ç¤­¤ë¡£

MNT_FORCE (2.1.116 °Ê¹ß)
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MNT_DETACH (2.4.11 °Ê¹ß)
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MNT_EXPIRE (Linux 2.6.8 °Ê¹ß)
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path_resolution(7), mount(8), umount(8)