void RecursiveDirectoryIterator::rewind() {
DirectoryIterator::rewind();
if (isdot()) {
next();
}
}
static int
vnop_lookup_9p(struct vnop_lookup_args *ap)
{
struct componentname *cnp;
node_9p *dnp;
vnode_t *vpp, dvp;
fid_9p fid;
qid_9p qid;
int e;
TRACE();
dvp = ap->a_dvp;
vpp = ap->a_vpp;
cnp = ap->a_cnp;
dnp = NTO9P(dvp);
if(!vnode_isdir(dvp))
return ENOTDIR;
if (isdotdot(cnp) && vnode_isvroot(dvp))
return EIO;
if (islastcn(cnp) && !isop(cnp, LOOKUP) && vnode_vfsisrdonly(dvp))
return EROFS;
if (isdot(cnp)) {
if (islastcn(cnp) && isop(cnp, RENAME))
return EISDIR;
if ((e=vnode_get(dvp)))
return e;
*vpp = dvp;
return 0;
}
if (isdotdot(cnp)) {
*vpp = vnode_getparent(dvp);
if (*vpp == NULL)
return ENOENT;
return 0;
}
e = cache_lookup(dvp, vpp, cnp);
if (e == -1) /* found */
return 0;
if (e != 0) /* errno */
return e;
/* not in cache */
nlock_9p(dnp, NODE_LCK_EXCLUSIVE);
e = walk_9p(dnp->nmp, dnp->fid, cnp->cn_nameptr, cnp->cn_namelen, &fid, &qid);
if (e) {
if (islastcn(cnp)) {
if (isop(cnp, CREATE) || isop(cnp, RENAME))
e = EJUSTRETURN;
else if (ismkentry(cnp) && dnp->dir.qid.vers!=0)
cache_enter(dvp, NULL, cnp);
}
goto error;
}
e = nget_9p(dnp->nmp, fid, qid, dvp, vpp, cnp, ap->a_context);
if (e || *vpp==NULL || NTO9P(*vpp)->fid!=fid)
clunk_9p(dnp->nmp, fid);
if (*vpp)
nunlock_9p(NTO9P(*vpp));
error:
nunlock_9p(dnp);
return e;
}
/*
* Occasionally, pathnames are created that look like .../x/../y
* Any of the 'x/..' sequences within the name can be eliminated.
* (but only if 'x' is not a symbolic link!!)
*/
void remove_dotdot(char *path)
{
char *end, *from, *to, **cp;
char *components[ MAXFILES ],
newpath[ BUFSIZ ];
boolean component_copied;
/*
* slice path up into components.
*/
to = newpath;
if (*path == '/')
*to++ = '/';
*to = '\0';
cp = components;
for (from=end=path; *end; end++)
if (*end == '/') {
while (*end == '/')
*end++ = '\0';
if (*from)
*cp++ = from;
from = end;
}
*cp++ = from;
*cp = NULL;
/*
* Recursively remove all 'x/..' component pairs.
*/
cp = components;
while(*cp) {
if (!isdot(*cp) && !isdotdot(*cp) && isdotdot(*(cp+1))
&& !issymbolic(newpath, *cp))
{
char **fp = cp + 2;
char **tp = cp;
do {
*tp++ = *fp; /* move all the pointers down */
} while (*fp++);
if (cp != components)
cp--; /* go back and check for nested ".." */
} else {
cp++;
}
}
/*
* Concatenate the remaining path elements.
*/
cp = components;
component_copied = FALSE;
while(*cp) {
if (component_copied)
*to++ = '/';
component_copied = TRUE;
for (from = *cp; *from; )
*to++ = *from++;
*to = '\0';
cp++;
}
*to++ = '\0';
/*
* copy the reconstituted path back to our pointer.
*/
strcpy(path, newpath);
}
