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/*
* Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/errno.h>
#include <sys/limits.h>
#include <os/mount.h>
#include <kern/namei.h>
#include <os/trace.h>
int
namei(struct nameidata *ndp)
{
struct mount *mpoint = NULL;
struct vnode *vp = NULL;
const char *p;
int error;
char namebuf[NAME_MAX];
size_t namebuf_idx = 0;
if (ndp == NULL) {
return -EINVAL;
}
if (ndp->pathname == NULL || ndp->vp_res == NULL) {
return -EINVAL;
}
trace("f: %s\n", ndp->pathname);
/* Iterate through the path */
p = ndp->pathname;
while (*p != '\0') {
/* Skip leading slashes */
while (*p != '\0' && *p == '/') {
*p++;
}
if (*p == '\0') {
break;
}
/* Fill the name buffer */
while (*p != '\0' && *p != '/') {
namebuf[namebuf_idx++] = *p++;
if (namebuf_idx >= sizeof(namebuf) - 1) {
break;
}
namebuf[namebuf_idx] = '\0';
}
/*
* If we have't yet looked up a mountpoint, do that and
* see if it was found.
*/
if (mpoint == NULL) {
error = mount_lookup(namebuf, &mpoint);
if (error != 0)
return error;
if ((vp = mpoint->vp) == NULL)
return -EIO;
namebuf_idx = 0;
continue;
}
trace("d: %s\n", namebuf);
namebuf_idx = 0;
}
ndp->vp_res = vp;
return 0;
}
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