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reads and writes to devices update m and a times

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add some security onn the chmod/chown operations
should now be root or owner
(still needs more thought but kinda-plugs tow holes pointed out by bde)
This commit is contained in:
Julian Elischer 1996-10-12 00:07:53 +00:00
parent 20bc4c3ac1
commit 1737b9d383
1 changed files with 9 additions and 3 deletions
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12
sys/miscfs/devfs/devfs_vnops.c
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@ -1,7 +1,7 @@
/*
* Written by Julian Elischer (julian@DIALix.oz.au)
*
* $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vnops.c,v 1.26 1996/09/11 07:52:18 julian Exp $
* $Header: /home/ncvs/src/sys/miscfs/devfs/devfs_vnops.c,v 1.27 1996/09/20 05:55:47 nate Exp $
*
* symlinks can wait 'til later.
*/
@ -622,6 +622,12 @@ DBPRINT(("setattr\n"));
return EINVAL;
}
if (cred->cr_uid != file_node->uid
&& (error = suser(cred, &p->p_acflag))
&& ((vap->va_vaflags & VA_UTIMES_NULL) == 0
|| (error = VOP_ACCESS(vp, VWRITE, cred, p))))
return (error);
if (vap->va_size != VNOVAL) {
return error; /*XXX (?) */
}
@ -1801,8 +1807,8 @@ static struct vnodeopv_entry_desc dev_spec_vnodeop_entries[] = {
{ &vop_getattr_desc, (vop_t *)devfs_getattr }, /* getattr */
{ &vop_setattr_desc, (vop_t *)devfs_setattr }, /* setattr */
{ &vop_read_desc, (vop_t *)spec_read }, /* read */
{ &vop_write_desc, (vop_t *)spec_write }, /* write */
{ &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */
{ &vop_write_desc, (vop_t *)devfs_write }, /* write */
{ &vop_ioctl_desc, (vop_t *)devfs_ioctl }, /* ioctl */
{ &vop_select_desc, (vop_t *)spec_select }, /* select */
{ &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
{ &vop_fsync_desc, (vop_t *)spec_fsync }, /* fsync */