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added support for link, and remove (unlink)

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can now ln /devs/disks/floppy/fd1.1200 to fd1
and remove unwanted dirs and devices etc.
Still has a fatal bug.. don't use yet :)
This commit is contained in:
Julian Elischer 1995-09-19 07:32:01 +00:00
parent af504bcff4
commit d51afe9d38
1 changed files with 150 additions and 8 deletions
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158
sys/miscfs/devfs/devfs_vnops.c
View File

@ -1,7 +1,7 @@
/*
* Written by Julian Elischer (julian@DIALix.oz.au)
*
* $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vnops.c,v 1.11 1995/09/07 06:01:36 julian Exp $
* $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vnops.c,v 1.12 1995/09/09 12:51:56 julian Exp $
*
* symlinks can wait 'til later.
*/
@ -814,10 +814,97 @@ int devfs_remove(struct vop_remove_args *ap) /*proto*/
struct componentname *a_cnp;
} */
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
dn_p tp, tdp;
devnm_p tnp;
int doingdirectory = 0, oldparent = 0, newparent = 0;
int error = 0;
/*vrele(DETOV(dep));*/
uid_t ouruid = cnp->cn_cred->cr_uid;
DBPRINT(("remove\n"));
return error;
/*
* Lock our directories and get our name pointers
* assume that the names are null terminated as they
* are the end of the path. Get pointers to all our
* devfs structures.
*/
if ( error = devfs_vntodn(dvp,&tdp)) {
abortit:
VOP_ABORTOP(dvp, cnp);
if (dvp == vp) /* eh? */
vrele(dvp);
else
vput(dvp);
if (vp)
vput(vp);
return (error);
}
if ( error = devfs_vntodn(vp,&tp)) goto abortit;
tnp = dev_findname(tdp,cnp->cn_nameptr);
if(!tnp) panic("devfs_rename: target dissapeared");
/*
* Check we are doing legal things WRT the new flags
*/
if ((tp->flags & (IMMUTABLE | APPEND))
|| (tdp->flags & APPEND) /*XXX eh?*/ ) {
error = EPERM;
goto abortit;
}
/*
* Make sure that we don't try do something stupid
*/
if ((tp->type) == DEV_DIR) {
/*
* Avoid ".", "..", and aliases of "." for obvious reasons.
*/
if ( (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.')
|| (cnp->cn_flags&ISDOTDOT) ) {
error = EINVAL;
goto abortit;
}
doingdirectory++;
}
/***********************************
* Start actually doing things.... *
***********************************/
TIMEVAL_TO_TIMESPEC(&time,&(tdp->mtime));
/*
* own the parent directory, or the destination of the rename,
* otherwise the destination may not be changed (except by
* root). This implements append-only directories.
* XXX shoudn't this be in generic code?
*/
if ((tdp->mode & S_ISTXT)
&& ouruid != 0
&& ouruid != tdp->uid
&& ouruid != tp->uid ) {
error = EPERM;
goto abortit;
}
/*
* Target must be empty if a directory and have no links
* to it. Also, ensure source and target are compatible
* (both directories, or both not directories).
*/
if (( doingdirectory) && (tp->links > 2)) {
printf("nlink = %d\n",tp->links); /*XXX*/
error = ENOTEMPTY;
goto abortit;
}
cache_purge(vp); /*XXX*/
dev_free_name(tnp);
tp = NULL;
vput(dvp);
return (error);
}
/*
@ -829,8 +916,67 @@ int devfs_link(struct vop_link_args *ap) /*proto*/
struct componentname *a_cnp;
} */
{
struct vnode *vp = ap->a_vp;
struct vnode *tdvp = ap->a_tdvp;
struct componentname *cnp = ap->a_cnp;
dn_p fp, tdp;
devnm_p tnp;
int doingdirectory = 0;
int error = 0;
uid_t outuid = cnp->cn_cred->cr_uid;
DBPRINT(("link\n"));
return 0;
/*
* First catch an arbitrary restriction for this FS
*/
if(cnp->cn_namelen > DEVMAXNAMESIZE) {
error = ENAMETOOLONG;
goto abortit;
}
/*
* Lock our directories and get our name pointers
* assume that the names are null terminated as they
* are the end of the path. Get pointers to all our
* devfs structures.
*/
if ( error = devfs_vntodn(tdvp,&tdp)) goto abortit;
if ( error = devfs_vntodn(vp,&fp)) goto abortit;
/*
* trying to move it out of devfs? (v_tag == VT_DEVFS)
*/
if ( (vp->v_tag != VT_DEVFS)
|| (vp->v_tag != tdvp->v_tag) ) {
error = EXDEV;
abortit:
VOP_ABORTOP(tdvp, cnp);
goto out;
}
/*
* Check we are doing legal things WRT the new flags
*/
if ((fp->flags & (IMMUTABLE | APPEND))
|| (tdp->flags & APPEND) /*XXX eh?*/ ) {
error = EPERM;
goto abortit;
}
/***********************************
* Start actually doing things.... *
***********************************/
TIMEVAL_TO_TIMESPEC(&time,&(tdp->atime));
error = dev_add_name(cnp->cn_nameptr,
tdp,
NULL,
fp,
&tnp);
out:
vrele(vp);
vput(tdvp);
return (error);
}
/*
@ -1376,7 +1522,6 @@ int devfs_pathconf(struct vop_pathconf_args *ap) /*proto*/
/*
* Print out the contents of a /devfs vnode.
*/
/* ARGSUSED */
int devfs_print(struct vop_print_args *ap) /*proto*/
/*struct vop_print_args {
struct vnode *a_vp;
@ -1460,9 +1605,6 @@ void devfs_dropvnode(dn_p dnp) /*proto*/
#define devfs_mmap ((int (*) __P((struct vop_mmap_args *)))devfs_enotsupp)
#define devfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop)
#define devfs_seek ((int (*) __P((struct vop_seek_args *)))nullop)
#define devfs_remove ((int (*) __P((struct vop_remove_args *)))devfs_enotsupp)
#define devfs_link ((int (*) __P((struct vop_link_args *)))devfs_enotsupp)
/*#define devfs_rename ((int (*) __P((struct vop_rename_args *)))devfs_enotsupp)*/
#define devfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))devfs_enotsupp)
#define devfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))devfs_enotsupp)
#define devfs_symlink ((int (*) __P((struct vop_symlink_args *)))devfs_enotsupp)