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syscall/open: Reference the path info directory vnode

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The kernel open call requires a path so to open a file we need to
set the current directory to the parent vnode. If the open mode is
create the path info vnode is the directory to perform the open
create in. Using the parent node creates the file in wrong path.

Updates #4723
This commit is contained in:
Chris Johns
2023-07-20 15:18:38 +10:00
parent 60e40e9b83
commit 65913f4b3b
2 changed files with 71 additions and 34 deletions
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24
rtemsbsd/rtems/rtems-bsd-syscall-api.c
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@@ -931,9 +931,18 @@ rtems_bsd_sysgen_open_node(
} else {
rtems_filesystem_location_info_t *rootloc =
&iop->pathinfo.mt_entry->mt_fs_root->location;
/*
* We need the parent directory so open can find the
* entry. If we are creating the file the pathinfo
* vnode entry is the directory open uses to create
* the file in.
*/
cdir = rtems_bsd_libio_loc_to_vnode_dir(&iop->pathinfo);
if (cdir == NULL || creat) {
cdir = rtems_bsd_libio_loc_to_vnode(&iop->pathinfo);
}
if (fdp->fd_cdir == NULL) {
cdir = rtems_bsd_libio_loc_to_vnode(rootloc);
cdir = rtems_bsd_libio_loc_to_vnode_dir(rootloc);
} else if (rtems_bsd_libio_loc_to_vnode(&iop->pathinfo) ==
rtems_bsd_libio_loc_to_vnode(rootloc)) {
/*
@@ -958,11 +967,14 @@ rtems_bsd_sysgen_open_node(
FILEDESC_XUNLOCK(fdp);
if (RTEMS_BSD_SYSCALL_TRACE) {
printf("bsd: sys: open: path=%s opath=%s vn=%p cwd=%p"
" flags=%08x mode=%08x isdir=%s\n",
path, opath,
creat ? NULL : rtems_bsd_libio_loc_to_vnode(&iop->pathinfo),
fdp->fd_cdir, oflag, mode, isdir ? "yes" : "no");
struct vnode* _vn = rtems_bsd_libio_loc_to_vnode(&iop->pathinfo);
struct vnode* _dvn = rtems_bsd_libio_loc_to_vnode_dir(&iop->pathinfo);
printf("bsd: sys: open: path=%s opath=%s vn=%p (%c) dvn=%p (%c) cwd=%p"
" flags=%08x mode=%o isdir=%s\n",
path, opath,
_vn, creat ? 'c' : _vn ? (_vn->v_type == VDIR ? 'd' : 'r') : 'n',
_dvn, _dvn ? (_dvn->v_type == VDIR ? 'd' : 'r') : 'n',
fdp->fd_cdir, oflag, mode, isdir ? "yes" : "no");
}
VREF(fdp->fd_cdir);