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stat, lstat, fstat — ?ե????륹?ơ??????μ???

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Standard C Library (libc, -lc)

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<sys/types.h> <sys/stat.h> int stat(const char *path, struct stat *sb) int lstat(const char *path, struct stat *sb) int fstat(int fd, struct stat *sb)

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stat() ?????ƥॳ?????ϡ? path ???ؤ??ե??????ξ????????????ޤ??? ???ꤷ???ե????????ɼ??긢???????߸????¹Ը???ɬ?פ????ޤ????? ???????????Υե??????ػ????ѥ?̾?????󤵤줿???٤ƤΥǥ??쥯?ȥ??ϡ? ??????ǽ?Ǥ??뤳?Ȥ?ɬ?פǤ???

lstat() ?ؿ??? stat() ?˻??Ƥ??ޤ????????ꤷ???ե????뤬?????ܥ??å????󥯤Ǥ????????ϰۤʤ??ޤ??? lstat() ?ϥ??󥯤ξ??????ᤷ?ޤ????? stat() ?ϥ??󥯤????Ȥ????ե??????ξ??????֤??ޤ???

fstat() ?????ƥॳ?????ϡ??ե????뵭?һ? fd ?Ƕ??̤????륪???ץ??ե??????ˤĤ??ơ?????Ʊ???????????????ޤ???

???? sb ?ϡ???¤?? stat ?ؤΥݥ??󥿤Ǥ??? ?????ϡ? <sys/stat.h> ?????????졢?ե??????˴ؤ??????????ݻ????ޤ???

?ե????륷???ƥ??˴?Ϣ???? struct stat ?Υե??????ɤϰʲ??ΤȤ????Ǥ?:

st_dev

?ե????????ޤ??ǥХ????ο??? ID??

st_ino

?ե??????? i ?Ρ????ֹ档

st_nlink

?ե??????ؤΥϡ??ɥ??󥯤ο???

st_dev ?? st_ino ?ե??????ɤϤȤ??˥????ƥ?????ͣ???Υե??????????ꤷ?ޤ???

struct stat ?λ????˴ؤ????ե??????ɤϡ??ʲ??ΤȤ????Ǥ?:

st_atime

?ե??????Υǡ??????Ǹ??˥??????????줿??? mknod(2), utimes(2), read(2) ?????? readv(2) ?????ƥॳ???????ѹ??????ޤ???

st_mtime

?ե??????Υǡ??????Ǹ??˽??????줿??? mkdir(2), mkfifo(2), mknod(2), utimes(2), write(2) ?????? writev(2) ?????ƥॳ???????ѹ??????ޤ???

st_ctime

?ե????륹?ơ????????Ǹ????ѹ????줿???? (inode ?ǡ????ν???)?? chflags(2), chmod(2), chown(2), creat(2), link(2), mkdir(2), mkfifo(2), mknod(2), rename(2), rmdir(2), symlink(2), truncate(2), unlink(2), utimes(2), write(2) ?????? writev(2) ?????ƥॳ???????ѹ??????ޤ???

st_birthtime

inode ?????????줿?Ȥ??λ??

_POSIX_SOURCE ???????????Ƥ??ʤ????硢?????˴ؤ????ե??????ɤϰʲ??Τ褦???????????ޤ?:

#ifndef _POSIX_SOURCE
#define st_atime st_atimespec.tv_sec
#define st_mtime st_mtimespec.tv_sec
#define st_ctime st_ctimespec.tv_sec
#endif

struct stat ?Υ??????˴ؤ????ե??????ɤϡ??ʲ??ΤȤ????Ǥ?:

st_size

?Х??Ȥ?ɽ???????ե????륵??????

st_blksize

?ե??????κ?Ŭ???????ϥ֥??å?????????

st_blocks

?ե??????? 512 ?Х???ñ?̤dz??????Ƥ??줿?֥??å??μºݤο??? û???????ܥ??å????󥯤? inode ???ݻ??????Ƥ??????硢???ο??ͤ? 0 ?ˤʤ뤳?Ȥ??????ޤ???

struct stat ?Υ?????????Ϣ?Υե??????ɤϰʲ??ΤȤ????Ǥ?:

st_uid

?ե??????ν?ͭ?ԤΥ桼??ID??

st_gid

?ե??????Υ??롼??ID??

st_mode

?ե??????ξ??? (????????)??

???ơ???????????? st_mode ?ˤϡ??ʲ??Τ褦?ʥӥåȤ??????ޤ?:

#define S_IFMT   0170000  /* ?ե??????Υ????? */
#define S_IFIFO  0010000  /* ̾???դ??ѥ??? (fifo) */
#define S_IFCHR  0020000  /* ?????饯?????ü??ե????? */
#define S_IFDIR  0040000  /* ?ǥ??쥯?ȥ? */
#define S_IFBLK  0060000  /* ?֥??å????ü??ե????? */
#define S_IFREG  0100000  /* ?̾? */
#define S_IFLNK  0120000  /* ?????ܥ??å??????? */
#define S_IFSOCK 0140000  /* ?????å? */
#define S_IFWHT  0160000  /* ?ۥ磻?ȥ????? */
#define S_ISUID  0004000  /* ?¹Ի??˥桼?? ID ?????? */
#define S_ISGID  0002000  /* ?¹Ի??˥??롼?? ID ?????? */
#define S_ISVTX  0001000  /* ???Ѹ??ˤ⥹???åפ??줿?ƥ????Ȥ???¸ */
#define S_IRUSR  0000400  /* ?ɼ??긢?¤ν?ͭ?? */
#define S_IWUSR  0000200  /* ?????߸??¤ν?ͭ?? */
#define S_IXUSR  0000100  /* ?¹? / ???????¤ν?ͭ?? */

?????????⡼?ɤΥꥹ?ȤˤĤ??Ƥϡ? <sys/stat.h>, access(2), chmod(2) ?򻲾Ȥ??Ƥ????????? ?ʲ??Υޥ????? m ???????Ϥ??줿 st_mode ?ͤ????ꤵ?줿?????פΥե????????б????Ƥ??뤫?ɤ??? ?ƥ??Ȥ??뤿???????Ѳ?ǽ?Ǥ?:

S_ISBLK(m)

?֥??å??ü??ե????뤫?ɤ????ƥ??Ȥ??롣

S_ISCHR(m)

?????饯???ü??ե????뤫?ɤ????ƥ??Ȥ??롣

S_ISDIR(m)

?ǥ??쥯?ȥ꤫?ɤ????ƥ??Ȥ??롣

S_ISFIFO(m)

?ѥ??פ? FIFO ?ü??ե????뤫?ɤ????ƥ??Ȥ??롣

S_ISLNK(m)

?????ܥ??å????󥯤??ɤ????ƥ??Ȥ??롣

S_ISREG(m)

?̾??Υե????뤫?ɤ????ƥ??Ȥ??롣

S_ISSOCK(m)

?????åȤ??ɤ????ƥ??Ȥ??롣

S_ISWHT(m)

?ۥ磻?ȥ????Ȥ??ɤ????ƥ??Ȥ??롣

?ޥ????ϡ??ƥ??Ȥ????ʤ? 0 ?ʳ????ޤ??ϥƥ??Ȥ????ʤ? 0 ??ɾ?????ޤ???

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Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

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?????ΥС????????Υ????ƥ??Ǥϡ? st_dev, st_uid, st_gid, st_rdev, st_size, st_blksize, st_blocks ?ե??????ɤ??̤Υ????פ????Ѥ??Ƥ??ޤ?????

???顼

stat() ?????ƥॳ?????? lstat() ?????ƥॳ?????ϡ??ʲ??Τ褦?ʾ????˥??顼?Ȥʤ??ޤ?:

[EACCES]

???ꤵ?줿?ѥ??ˤϡ??????????Ĥ????Ƥ??ʤ??ǥ??쥯?ȥ꤬?ޤޤ??Ƥ??ޤ???

[EFAULT]

sb ?????ޤ??? path ?????ϡ??ץ??????˳??????Ƥ??줿???ɥ쥹???֤??ϰϳ????ؤ??Ƥ??ޤ???

[EIO]

?ե????륷???ƥ??Ǥ??ɤ߽????????????ϥ??顼??ȯ?????ޤ?????

[ELOOP]

?ѥ?̾???Ѵ??????Ȥ??˸??Ф??줿?????ܥ??å????󥯤?¿?????ޤ???

[ENAMETOOLONG]

?ѥ?̾?ι??????Ǥ? 255 ʸ?????ۤ??Ƥ??뤫?? ?ޤ??ϥѥ?̾???Τ? 1023 ʸ?????ۤ??Ƥ??ޤ???

[ENOENT]

???ꤵ?줿?ե????뤬¸?ߤ??ޤ?????

[ENOTDIR]

?ѥ??ι??????????˥ǥ??쥯?ȥ??ʳ??Τ??Τ??ޤޤ??Ƥ??ޤ???

[EOVERFLOW]

?ե????륵?????ΥХ??ȿ????? sb ?ǻؤ????Ƥ??빽¤?Τ???????ɽ???Ǥ??ޤ?????

fstat() ?????ƥॳ?????ϡ??ʲ??Τ褦?ʾ????˥??顼?Ȥʤ??ޤ?:

[EBADF]

fd ????????ͭ???ʵ??һҤǤϤ????ޤ?????

[EFAULT]

sb ?????????ץ??????˳??????Ƥ??줿???ɥ쥹???֤??ϰϳ????ؤ??Ƥ??ޤ???

[EIO]

?ե????륷???ƥ????ɤ߽񤭤??Ƥ????֤??????ϥ??顼??ȯ?????ޤ?????

[EOVERFLOW]

?ե????륵?????ΥХ??ȿ????? sb ?ǻؤ????Ƥ??빽¤?Τ???????ɽ???Ǥ??ޤ?????

??Ϣ????

access(2), chmod(2), chown(2), utimes(2), symlink(7), sticky(8)

?Х?

fstat() ?򥽥??å? (?????ӥѥ???) ??Ŭ?Ѥ????ȡ??֥??å????????ե??????ɡ? ?????Ӹ?ͭ?ǥХ????? inode ?ֹ??ʳ??? 0 ?????ä??Хåե????ᤵ???ޤ???

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stat() ?????ƥॳ?????? fstat() ?????ƥॳ?????ϡ? IEEE Std 1003.1-1990 (“POSIX.1”) ??Ŭ?礷?Ƥ??ޤ???

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stat() ?????ƥॳ?????? fstat() ?????ƥॳ?????ϡ? Version 7 AT&T UNIX ???о줷?ޤ????? lstat() ?????ƥॳ?????? 4.2BSD ???о줷?ޤ?????