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31 .\" $DragonFly: src/share/man/man9/nlookup.9,v 1.11 2008/02/09 09:45:03 swildner Exp $
39 .Nm nlookup_init_raw ,
40 .Nm nlookup_set_cred ,
53 .Fn nlookup "struct nlookupdata *nd"
55 .Fn nlookup_init "struct nlookupdata *nd" "const char *path" "enum uio_seg seg" "int flags"
57 .Fn nlookup_init_raw "struct nlookupdata *nd" "const char *path" "enum uio_seg seg" "int flags" "struct ucred *cred" "struct namecache *ncstart"
59 .Fn nlookup_set_cred "struct nlookupdata *nd" "struct ucred *cred"
61 .Fn nlookup_zero "struct nlookupdata *nd"
63 .Fn nlookup_done "struct nlookupdata *nd"
64 .Ft "struct namecache *"
65 .Fn nlookup_simple "const char *str" "enum uio_seg seg" "int niflags" "int *error"
67 .Fn nlookup_mp "struct mount *mp" "struct namecache **ncpp"
69 .Fn nreadsymlink "struct nlookupdata *nd" "struct namecache *ncp" "struct nlcomponent *nlc"
71 .Fn naccess "struct namecache *ncp" "int vmode" "struct ucred *cred"
73 .Fn naccess_va "struct vattr *va" "int vmode" "struct ucred *cred"
76 does a generic namecache lookup.
78 .Fa "struct nlookupdata"
81 on return, even if an error occurs.
82 If no error occurs the returned nl_ncp
83 is always referenced and locked, otherwise it may or may not be.
84 Intermediate directory elements, including the current directory,
85 require execute (search) permission.
87 does not examine the access permissions on the returned element.
92 is set the last directory must allow
95 .Dv VCREATE Ns / Ns Dv VDELETE
97 and an error code of 0
98 will be returned for a non-existent target.
99 Otherwise a non-existent target will cause
105 .Fa "struct nlookupdata" ,
106 and does an early error
107 return for copyin faults or a degenerate empty string (which is
109 The first process proc0's
110 credentials are used if the calling
111 thread is not associated with a process context.
116 but does not assume a process context.
117 rootncp is always chosen for the root directory and the
119 and starting directory are supplied in the arguments.
122 sets a different credential; this credential will be used by
123 future operations performed on nd.nl_open_vp
130 .Fa "struct nlookupdata" .
135 structure after we are through with
137 This function may be called on any nlookupdata structure
142 is mandatory in all cases except where
144 returns an error, even if as a consumer you believe you
145 have taken all dynamic elements out of the
150 is a simple all-in-one
152 It returns a locked namecache structure or NULL if an error
154 Note that the returned ncp
155 is not checked for permissions,
158 is checked on the directory path leading up to
162 to check the permissions of the returned leaf.
165 is used to resolve a mount point's glue ncp.
166 It creates the illusion of continuity in the namecache tree
167 by connecting the ncp related to the vnode under the mount
168 to the ncp related to the mount's root vnode.
169 If no error occurred a locked, ref'd ncp is stored in
173 reads the contents of a symlink, allocates a path buffer out
174 of the namei_zone and initialize the supplied nlcomponent
176 If an error occurs no buffer will be allocated or returned
180 generally checks the V* access bits from
182 All specified bits must pass for this function to return 0.
185 is specified and the target ncp represents a
186 non-existent file or dir, or if
189 target exists, the parent directory is checked for
193 is specified and the target ncp represents a positive
194 hit, an error is returned.
197 is not specified and the target does not exist
203 does not (and should not) return
205 for non-existent leafs.
206 The passed ncp may or may not be locked.
207 The caller should use a locked ncp on leaf lookups, especially
216 checks the requested access against the given
221 .Pa sys/kern/vfs_nlookup.c
226 This man page was written by