[src/trunk]: src/share/man/man9 update struct nameidata documentation

[salazar <salazar%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3006a614f28c
branches:  trunk
changeset: 815202:3006a614f28c
user:      salazar <salazar%NetBSD.org@localhost>
date:      Thu May 05 17:06:41 2016 +0000

description:
update struct nameidata documentation

diffstat:

 share/man/man9/namei.9 |  91 +++++++++++++++++++++++++++----------------------
 1 files changed, 50 insertions(+), 41 deletions(-)

diffs (112 lines):

diff -r 628ac9d3fb6c -r 3006a614f28c share/man/man9/namei.9
--- a/share/man/man9/namei.9    Thu May 05 16:55:56 2016 +0000
+++ b/share/man/man9/namei.9    Thu May 05 17:06:41 2016 +0000
@@ -1,4 +1,4 @@
-.\"     $NetBSD: namei.9,v 1.34 2015/04/21 10:00:30 wiz Exp $
+.\"     $NetBSD: namei.9,v 1.35 2016/05/05 17:06:41 salazar Exp $
 .\"
 .\" Copyright (c) 2001, 2005, 2006 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd April 21, 2015
+.Dd May 05, 2016
 .Dt NAMEI 9
 .Os
 .Sh NAME
@@ -84,45 +84,54 @@
 It has the following layout:
 .Bd -literal
 struct nameidata {
-        /*
-         * Arguments to namei/lookup.
-         */
-        struct vnode *ni_startdir;      /* starting dir, cwd if null */
-        struct pathbuf *ni_pathbuf;     /* pathname container */
-        char *ni_pnbuf;                 /* extra pathname buffer ref (XXX) */
-        /*
-         * Arguments to lookup.
-         */
-        struct  vnode *ni_startdir;     /* starting directory */
-        struct  vnode *ni_rootdir;      /* logical root directory */
-        /*
-         * Results: returned from/manipulated by lookup
-         */
-        struct  vnode *ni_vp;           /* vnode of result */
-        struct  vnode *ni_dvp;          /* vnode of intermediate dir */
-        /*
-         * Shared between namei and lookup/commit routines.
-         */
-        size_t ni_pathlen;              /* remaining chars in path */
-        const char *ni_next;            /* next location in pathname */
-        unsigned int ni_loopcnt;        /* count of symlinks encountered */
-        /*
-         * Lookup parameters
-         */
-        struct componentname {
-                /*
-                 * Arguments to lookup.
-                 */
-                uint32_t cn_nameiop;    /* namei operation */
-                uint32_t cn_flags;      /* flags to namei */
-                kauth_cred_t cn_cred;   /* credentials */
-                /*
-                 * Shared between lookup and commit routines.
-                 */
-                const char *cn_nameptr; /* pointer to looked up name */
-                size_t cn_namelen;      /* length of looked up component */
-                size_t cn_consume;      /* chars to be consumed this time */
-        } ni_cnd;
+       /*
+        * Arguments to namei/lookup.
+        */
+       struct vnode *ni_atdir;         /* startup dir, cwd if null */
+       struct pathbuf *ni_pathbuf;     /* pathname container */
+       char *ni_pnbuf;                 /* extra pathname buffer ref (XXX) */
+       /*
+        * Arguments to lookup.
+        */
+       struct  vnode *ni_rootdir;      /* logical root directory */
+       struct  vnode *ni_erootdir;     /* emulation root directory */
+       /*
+        * Results: returned from/manipulated by lookup
+        */
+       struct  vnode *ni_vp;           /* vnode of result */
+       struct  vnode *ni_dvp;          /* vnode of intermediate directory */
+       /*
+        * Shared between namei and lookup/commit routines.
+        */
+       size_t          ni_pathlen;     /* remaining chars in path */
+       const char      *ni_next;       /* next location in pathname */
+       unsigned int    ni_loopcnt;     /* count of symlinks encountered */
+       /*
+        * Lookup parameters: this structure describes the subset of
+        * information from the nameidata structure that is passed
+        * through the VOP interface.
+        */
+       struct componentname ni_cnd;
+};
+.Ed
+.Pp
+The
+.Em componentname
+structure has the following layout:
+.Bd -literal
+struct componentname {
+       /*
+        * Arguments to lookup.
+        */
+       uint32_t        cn_nameiop;     /* namei operation */
+       uint32_t        cn_flags;       /* flags to namei */
+       kauth_cred_t    cn_cred;        /* credentials */
+       /*
+        * Shared between lookup and commit routines.
+        */
+       const char      *cn_nameptr;    /* pointer to looked up name */
+       size_t          cn_namelen;     /* length of looked up comp */
+       size_t          cn_consume;     /* chars to consume in lookup */
 };
 .Ed
 .Pp