1 .\" Hey Emacs! This file is -*- nroff -*- source.
3 .\" Copyright (C) 2003 John Levon <levon@movementarian.org>
5 .\" Permission is granted to make and distribute verbatim copies of this
6 .\" manual provided the copyright notice and this permission notice are
7 .\" preserved on all copies.
9 .\" Permission is granted to copy and distribute modified versions of this
10 .\" manual under the conditions for verbatim copying, provided that the
11 .\" entire resulting derived work is distributed under the terms of a
12 .\" permission notice identical to this one.
14 .\" Since the Linux kernel and libraries are constantly changing, this
15 .\" manual page may be incorrect or out-of-date. The author(s) assume no
16 .\" responsibility for errors or omissions, or for damages resulting from
17 .\" the use of the information contained herein. The author(s) may not
18 .\" have taken the same level of care in the production of this manual,
19 .\" which is licensed free of charge, as they might when working
22 .\" Formatted or processed versions of this manual, if unaccompanied by
23 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" Modified 2004-06-17 Michael Kerrisk <mtk.manpages@gmail.com>
27 .\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI
28 .\" all rights reserved.
29 .\" Translated, 2003-06-04, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
30 .\" Updated, 2003-09-30, Akihiro MOTOKI
31 .\" Updated, 2005-02-10, Akihiro MOTOKI
33 .\"WORD: opaque identifier ÆâÉô¼±ÊÌ»Ò
34 .\"WORD: Linux specific Linux Æȼ«
35 .\"WORD: capability ¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£
37 .TH LOOKUP_DCOOKIE 2 2004-06-17 "Linux" "Linux Programmer's Manual"
40 .\"O lookup_dcookie \- return a directory entry's path
41 lookup_dcookie \- ¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Î¥Ñ¥¹Ì¾¤òÊÖ¤¹
44 .BI "int lookup_dcookie(u64 " cookie ", char *" buffer ", size_t " len );
47 .\"O Look up the full path of the directory entry specified by the value
49 .\"O The cookie is an opaque identifier uniquely identifying a particular
51 .\"O The buffer given is filled in with the full path of the directory entry.
53 ÃͤǻØÄꤵ¤ì¤¿¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Î¥Õ¥ë¥Ñ¥¹Ì¾¤ò¸¡º÷¤¹¤ë¡£
54 cookie ¤Ï¡¢¸Ä¡¹¤Î¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤ò¶èÊ̤¹¤ëÆâÉô¼±ÊÌ»Ò (opaque
55 identifier) ¤Ç¤¢¤ë¡£°ú¤¿ô¤Ç»ØÄꤵ¤ì¤¿¥Ð¥Ã¥Õ¥¡¤Ë¡¢¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Î
56 ¥Õ¥ë¥Ñ¥¹Ì¾¤¬³ÊǼ¤µ¤ì¤ë¡£
59 .\"O .BR lookup_dcookie ()
60 .\"O to return successfully,
61 .\"O the kernel must still hold a cookie reference to the directory entry.
63 ¤¬Àµ¾ï¤ËÃͤòÊÖ¤¹¤¿¤á¤Ë¤Ï¡¢¥«¡¼¥Í¥ë¤¬¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Ø¤Î cookie »²¾È¤ò
64 ÊÝ»ý¤·¤Æ¤¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
65 .\"O .SH "RETURN VALUE"
68 .\"O .BR lookup_dcookie ()
69 .\"O returns the length of the path string copied into the buffer.
70 .\"O On error, \-1 is returned, and
72 .\"O is set appropriately.
75 ¤Ï¥Ð¥Ã¥Õ¥¡¤Ë¥³¥Ô¡¼¤·¤¿¥Ñ¥¹Ê¸»úÎó¤ÎŤµ¤òÊÖ¤¹¡£
76 ¥¨¥é¡¼¤Î¾ì¹ç¤Ï \-1 ¤òÊÖ¤·¡¢
78 ¤ËŬÀÚ¤ÊÃͤòÀßÄꤹ¤ë¡£
83 .\"O The buffer was not valid.
84 ¥Ð¥Ã¥Õ¥¡¤¬Í¸ú¤Ç¤Ê¤«¤Ã¤¿¡£
87 .\"O The kernel has no registered cookie/directory entry mappings at the
88 .\"O time of lookup, or the cookie does not refer to a valid directory entry.
89 ¸¡º÷¤¬¹Ô¤ï¤ì¤¿»þ¡¢cookie ¤È¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Î¥Þ¥Ã¥Ô¥ó¥°¤¬¥«¡¼¥Í¥ë¤Ë
90 ÅÐÏ¿¤µ¤ì¤Æ¤¤¤Ê¤«¤Ã¤¿¤«¡¢¤Þ¤¿¤Ï cookie ¤¬Í¸ú¤Ê¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤ò
94 .\"O The name could not fit in the buffer.
95 ̾Á°¤¬¥Ð¥Ã¥Õ¥¡¤ËÆþ¤êÀÚ¤é¤Ê¤«¤Ã¤¿¡£
98 .\"O The kernel could not allocate memory for the temporary buffer holding
100 ¥«¡¼¥Í¥ë¤¬¡¢¥Ñ¥¹Ì¾¤òÊÝ»ý¤¹¤ë°ì»þ¥Ð¥Ã¥Õ¥¡ÍѤΥá¥â¥ê¤ò³ä¤êÅö¤Æ¤ë¤³¤È¤¬
104 .\"O The process does not have the capability
105 .\"O .B CAP_SYS_ADMIN
106 .\"O required to look up cookie values.
107 ¥×¥í¥»¥¹¤¬ cookie Ãͤò¸¡º÷¤¹¤ë¤Î¤ËɬÍפʥ±¡¼¥Ñ¥Ó¥ê¥Æ¥£
112 .\"O The buffer was not large enough to hold the path of the directory entry.
113 ¥Ð¥Ã¥Õ¥¡¤¬¡¢¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤Î¥Ñ¥¹Ì¾¤ò¼ýÍƤ¹¤ë¤Î¤Ë
114 ½½Ê¬¤ÊÂ礤µ¤Ç¤Ï¤Ê¤«¤Ã¤¿¡£
116 .\"O Since Linux 2.5.43.
119 .\"O error return was added in 2.5.70.
121 Linux 2.5.43 °Ê¹ß¤ÇÍøÍѤǤ¤ë¡£
124 ¤òÊÖ¤¹»ÅÍÍ¤Ï 2.5.70 ¤ÇÄɲ䵤줿¡£
125 .\"O .SH "CONFORMING TO"
127 .\"O .BR lookup_dcookie ()
128 .\"O is Linux-specific.
129 .BR lookup_dcookie ()
130 ¤Ï Linux Æȼ«¤Î´Ø¿ô¤Ç¤¢¤ë¡£
133 .\"O .BR lookup_dcookie ()
134 .\"O is a special-purpose system call, currently used only by the oprofile profiler.
135 .\"O It relies on a kernel driver to register cookies for directory entries.
136 .BR lookup_dcookie ()
137 ¤ÏÆüì¤ÊÍÑÅӤ˻Ȥï¤ì¤ë¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ç¡¢¸½ºß¤Î¤È¤³¤í oprofile profiler ¤Ç
138 »È¤ï¤ì¤Æ¤¤¤ë¤À¤±¤Ç¤¢¤ë¡£
140 .\"O The path returned may be suffixed by the string " (deleted)" if the directory
141 .\"O entry has been removed.
142 »ØÄꤵ¤ì¤¿¥Ç¥£¥ì¥¯¥È¥ê¡¦¥¨¥ó¥È¥ê¤¬ºï½ü¤µ¤ì¤Æ¤¤¤¿¾ì¹ç¡¢ÊÖ¤µ¤ì¤ë¥Ñ¥¹Ì¾¤ÎºÇ¸å¤Ë
144 ¤È¤¤¤¦Ê¸»úÎó¤¬Éղ䵤ì¤ë¤³¤È¤¬¤¢¤ë¡£