1693ad767SDavid van Moolenbroek /* VTreeFS - path.c - name resolution */
2433d6423SLionel Sambuc
3433d6423SLionel Sambuc #include "inc.h"
4433d6423SLionel Sambuc
5693ad767SDavid van Moolenbroek /*
6693ad767SDavid van Moolenbroek * Resolve a path string to an inode.
7693ad767SDavid van Moolenbroek */
8693ad767SDavid van Moolenbroek int
fs_lookup(ino_t dir_nr,char * name,struct fsdriver_node * node_details,int * is_mountpt)9693ad767SDavid van Moolenbroek fs_lookup(ino_t dir_nr, char * name, struct fsdriver_node * node_details,
100dc5c83eSDavid van Moolenbroek int * is_mountpt)
11433d6423SLionel Sambuc {
120dc5c83eSDavid van Moolenbroek struct inode *node, *child;
130dc5c83eSDavid van Moolenbroek int r;
14433d6423SLionel Sambuc
150dc5c83eSDavid van Moolenbroek if ((node = find_inode(dir_nr)) == NULL)
16433d6423SLionel Sambuc return EINVAL;
17433d6423SLionel Sambuc
180dc5c83eSDavid van Moolenbroek if (!S_ISDIR(node->i_stat.mode))
190dc5c83eSDavid van Moolenbroek return ENOTDIR;
20433d6423SLionel Sambuc
21*c21aa858SCristiano Giuffrida if (strlen(name) > NAME_MAX)
220dc5c83eSDavid van Moolenbroek return ENAMETOOLONG;
23433d6423SLionel Sambuc
240dc5c83eSDavid van Moolenbroek if (!strcmp(name, ".")) {
250dc5c83eSDavid van Moolenbroek /* Stay in the given directory. */
260dc5c83eSDavid van Moolenbroek child = node;
270dc5c83eSDavid van Moolenbroek } else if (!strcmp(name, "..")) {
280dc5c83eSDavid van Moolenbroek /* Progress into the parent directory. */
290dc5c83eSDavid van Moolenbroek if ((child = get_parent_inode(node)) == NULL)
300dc5c83eSDavid van Moolenbroek return ENOENT; /* deleted? should not be possible */
31433d6423SLionel Sambuc } else {
320dc5c83eSDavid van Moolenbroek /* Progress into a directory entry. Call the lookup hook, if
330dc5c83eSDavid van Moolenbroek * present, before doing the actual lookup.
34433d6423SLionel Sambuc */
350dc5c83eSDavid van Moolenbroek if (!is_inode_deleted(node) &&
360dc5c83eSDavid van Moolenbroek vtreefs_hooks->lookup_hook != NULL) {
370dc5c83eSDavid van Moolenbroek r = vtreefs_hooks->lookup_hook(node, name,
380dc5c83eSDavid van Moolenbroek get_inode_cbdata(node));
390dc5c83eSDavid van Moolenbroek if (r != OK) return r;
40433d6423SLionel Sambuc }
41433d6423SLionel Sambuc
420dc5c83eSDavid van Moolenbroek if ((child = get_inode_by_name(node, name)) == NULL)
430dc5c83eSDavid van Moolenbroek return ENOENT;
44433d6423SLionel Sambuc }
45433d6423SLionel Sambuc
460dc5c83eSDavid van Moolenbroek /* On success, open the resulting file and return its details. */
470dc5c83eSDavid van Moolenbroek ref_inode(child);
48433d6423SLionel Sambuc
490dc5c83eSDavid van Moolenbroek node_details->fn_ino_nr = get_inode_number(child);
500dc5c83eSDavid van Moolenbroek node_details->fn_mode = child->i_stat.mode;
510dc5c83eSDavid van Moolenbroek node_details->fn_size = child->i_stat.size;
520dc5c83eSDavid van Moolenbroek node_details->fn_uid = child->i_stat.uid;
530dc5c83eSDavid van Moolenbroek node_details->fn_gid = child->i_stat.gid;
540dc5c83eSDavid van Moolenbroek node_details->fn_dev = child->i_stat.dev;
55433d6423SLionel Sambuc
560dc5c83eSDavid van Moolenbroek *is_mountpt = FALSE;
57433d6423SLionel Sambuc
58433d6423SLionel Sambuc return OK;
59433d6423SLionel Sambuc }
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