common/fs/pathname.c

75 pn_alloc(struct pathname *pnp)
77 	pnp->pn_path = pnp->pn_buf = kmem_alloc(MAXPATHLEN, KM_SLEEP);
78 	pnp->pn_pathlen = 0;
79 	pnp->pn_bufsize = MAXPATHLEN;
86 pn_free(struct pathname *pnp)
89 	kmem_free(pnp->pn_buf, pnp->pn_bufsize);
90 	pnp->pn_path = pnp->pn_buf = NULL;
91 	pnp->pn_pathlen = pnp->pn_bufsize = 0;
101 pn_get_buf(char *str, enum uio_seg seg, struct pathname *pnp,
106 	pnp->pn_path = pnp->pn_buf = buf;
107 	pnp->pn_bufsize = bufsize;
109 		error = copyinstr(str, pnp->pn_path, bufsize, &pnp->pn_pathlen);
111 		error = copystr(str, pnp->pn_path, bufsize, &pnp->pn_pathlen);
114 	pnp->pn_pathlen--;		/* don't count null byte */
122 pn_get(char *str, enum uio_seg seg, struct pathname *pnp)
128 	if ((error = pn_get_buf(str, seg, pnp, buf, MAXPATHLEN)) != 0)
129 		pn_free(pnp);
140 pn_set(struct pathname *pnp, char *path)
144 	pnp->pn_path = pnp->pn_buf;
145 	error = copystr(path, pnp->pn_path, pnp->pn_bufsize, &pnp->pn_pathlen);
146 	pnp->pn_pathlen--;		/* don't count null byte */
162 pn_insert(struct pathname *pnp, struct pathname *sympnp, size_t complen)
169 		if (pnp->pn_pathlen + sympnp->pn_pathlen >= pnp->pn_bufsize)
171 		if (pnp->pn_pathlen != 0)
172 			ovbcopy(pnp->pn_path, pnp->pn_buf + sympnp->pn_pathlen,
173 			    pnp->pn_pathlen);
174 		bcopy(sympnp->pn_path, pnp->pn_buf, sympnp->pn_pathlen);
175 		pnp->pn_pathlen += sympnp->pn_pathlen;
176 		pnp->pn_buf[pnp->pn_pathlen] = '\0';
177 		pnp->pn_path = pnp->pn_buf;
182 		if ((pnp->pn_path - pnp->pn_buf) - complen +
183 		    pnp->pn_pathlen + sympnp->pn_pathlen >= pnp->pn_bufsize)
186 		if (pnp->pn_pathlen != 0)
187 			ovbcopy(pnp->pn_path, pnp->pn_path - complen +
188 			    sympnp->pn_pathlen, pnp->pn_pathlen + 1);
189 		pnp->pn_path -= complen;
190 		bcopy(sympnp->pn_path, pnp->pn_path, sympnp->pn_pathlen);
191 		pnp->pn_pathlen += sympnp->pn_pathlen;
198 pn_getsymlink(vnode_t *vp, struct pathname *pnp, cred_t *crp)
204 	aiov.iov_base = pnp->pn_path = pnp->pn_buf;
205 	aiov.iov_len = pnp->pn_bufsize;
211 	auio.uio_resid = pnp->pn_bufsize;
213 		pnp->pn_pathlen = pnp->pn_bufsize - auio.uio_resid;
214 		if (pnp->pn_pathlen == pnp->pn_bufsize)
217 			pnp->pn_path[pnp->pn_pathlen] = '\0';
228 pn_getcomponent(struct pathname *pnp, char *component)
233 	path = pnp->pn_path;
234 	pathlen = pnp->pn_pathlen;
250 	pnp->pn_path = cp;
251 	pnp->pn_pathlen = pathlen - (cp - path);
260 pn_skipslash(struct pathname *pnp)
262 	while (pnp->pn_pathlen > 0 && *pnp->pn_path == '/') {
263 		pnp->pn_path++;
264 		pnp->pn_pathlen--;
275 pn_setlast(struct pathname *pnp)
277 	char *buf = pnp->pn_buf;
278 	char *path = pnp->pn_path + pnp->pn_pathlen - 1;
289 	pnp->pn_path = path;
290 	pnp->pn_pathlen = endpath - path;
298 pn_fixslash(struct pathname *pnp)
300 	char *start = pnp->pn_path;
301 	char *end = start + pnp->pn_pathlen;
305 	if (pnp->pn_pathlen == end - start)
308 	pnp->pn_pathlen = end - start;
317 pn_addslash(struct pathname *pnp)
319 	if (pnp->pn_path + pnp->pn_pathlen + 1 >=
320 	    pnp->pn_buf + pnp->pn_bufsize) {
321 		if (pnp->pn_pathlen + 1 >= pnp->pn_bufsize)	/* no room */
327 		ovbcopy(pnp->pn_path, pnp->pn_buf, pnp->pn_pathlen);
328 		pnp->pn_path = pnp->pn_buf;
330 	pnp->pn_path[pnp->pn_pathlen++] = '/';
331 	pnp->pn_path[pnp->pn_pathlen] = '\0';