VOP_LOOKUP.9 (0640e9e01b3e93e057629a848b7870f30427c609) VOP_LOOKUP.9 (dc7bf98cd1bf496f42b940b88556070376995baf)
1.\" -*- nroff -*-
2.\"
3.\" Copyright (c) 1996 Doug Rabson
4.\"
5.\" All rights reserved.
6.\"
7.\" This program is free software.
8.\"

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57is a pointer to a componentname structure defined as follows:
58.Bd -literal
59struct componentname {
60 /*
61 * Arguments to lookup.
62 */
63 u_long cn_nameiop; /* namei operation */
64 u_long cn_flags; /* flags to namei */
1.\" -*- nroff -*-
2.\"
3.\" Copyright (c) 1996 Doug Rabson
4.\"
5.\" All rights reserved.
6.\"
7.\" This program is free software.
8.\"

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57is a pointer to a componentname structure defined as follows:
58.Bd -literal
59struct componentname {
60 /*
61 * Arguments to lookup.
62 */
63 u_long cn_nameiop; /* namei operation */
64 u_long cn_flags; /* flags to namei */
65 struct proc *cn_proc; /* process requesting lookup */
65 struct thread *cn_thread; /* process requesting lookup */
66 struct ucred *cn_cred; /* credentials */
67 /*
68 * Shared between lookup and commit routines.
69 */
70 char *cn_pnbuf; /* pathname buffer */
71 char *cn_nameptr; /* pointer to looked up name */
72 long cn_namelen; /* length of looked up component */
73 u_long cn_hash; /* hash value of looked up name */

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171 struct vnode *vp = NULL;
172
173 /*
174 * Check accessibility of directory.
175 */
176 if (dvp->v_type != VDIR)
177 return ENOTDIR;
178
66 struct ucred *cn_cred; /* credentials */
67 /*
68 * Shared between lookup and commit routines.
69 */
70 char *cn_pnbuf; /* pathname buffer */
71 char *cn_nameptr; /* pointer to looked up name */
72 long cn_namelen; /* length of looked up component */
73 u_long cn_hash; /* hash value of looked up name */

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171 struct vnode *vp = NULL;
172
173 /*
174 * Check accessibility of directory.
175 */
176 if (dvp->v_type != VDIR)
177 return ENOTDIR;
178
179 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_proc);
179 error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_thread);
180 if (error)
181 return (error);
182
183 if (islastcn && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
184 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
185 return (EROFS);
186
187 /*

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291 * which can be used to remove file. If the wantparent flag
292 * isn't set, we return only the directory, otherwise we go on
293 * and lock the inode, being careful with ".".
294 */
295 if (nameiop == DELETE && islastcn) {
296 /*
297 * Check for write access on directory.
298 */
180 if (error)
181 return (error);
182
183 if (islastcn && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
184 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
185 return (EROFS);
186
187 /*

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291 * which can be used to remove file. If the wantparent flag
292 * isn't set, we return only the directory, otherwise we go on
293 * and lock the inode, being careful with ".".
294 */
295 if (nameiop == DELETE && islastcn) {
296 /*
297 * Check for write access on directory.
298 */
299 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_proc);
299 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
300 if (error)
301 return (error);
302
303 if (found entry is same as dvp) {
304 VREF(dvp);
305 *vpp = dvp;
306 return 0;
307 }

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326
327 /*
328 * If rewriting (RENAME), return the inode and the
329 * information required to rewrite the present directory
330 * Must get inode of directory entry to verify it's a
331 * regular file, or empty directory.
332 */
333 if (nameiop == RENAME && wantparent && islastcn) {
300 if (error)
301 return (error);
302
303 if (found entry is same as dvp) {
304 VREF(dvp);
305 *vpp = dvp;
306 return 0;
307 }

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326
327 /*
328 * If rewriting (RENAME), return the inode and the
329 * information required to rewrite the present directory
330 * Must get inode of directory entry to verify it's a
331 * regular file, or empty directory.
332 */
333 if (nameiop == RENAME && wantparent && islastcn) {
334 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_proc);
334 error = VOP_ACCESS(dvp, VWRITE, cred, cnp->cn_thread);
335 if (error)
336 return (error);
337
338 /*
339 * Check for "."
340 */
341 if (found entry is same as dvp)
342 return EISDIR;

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336 return (error);
337
338 /*
339 * Check for "."
340 */
341 if (found entry is same as dvp)
342 return EISDIR;

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