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Add canonical checks to devfs_setattr().

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This commit is contained in:
Poul-Henning Kamp 2000-09-16 12:06:58 +00:00
parent 8cf0402e5d
commit c80d29139c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=65920
1 changed files with 50 additions and 14 deletions
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64
sys/fs/devfs/devfs_vnops.c
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@ -546,31 +546,67 @@ devfs_setattr(ap)
} */ *ap;
{
struct devfs_dirent *de;
int c;
struct vattr *vap;
int c, error;
uid_t uid;
gid_t gid;
vap = ap->a_vap;
if ((vap->va_type != VNON) ||
(vap->va_nlink != VNOVAL) ||
(vap->va_fsid != VNOVAL) ||
(vap->va_fileid != VNOVAL) ||
(vap->va_blocksize != VNOVAL) ||
(vap->va_flags != VNOVAL) ||
(vap->va_rdev != VNOVAL) ||
((int)vap->va_bytes != VNOVAL) ||
(vap->va_gen != VNOVAL)) {
return (EINVAL);
}
de = ap->a_vp->v_data;
if (ap->a_vp->v_type == VDIR)
de = de->de_dir;
c = 0;
if (ap->a_vap->va_flags != VNOVAL)
return (EOPNOTSUPP);
if (ap->a_vap->va_uid != (uid_t)VNOVAL) {
de->de_uid = ap->a_vap->va_uid;
error = c = 0;
if (vap->va_uid == (uid_t)VNOVAL)
uid = de->de_uid;
else
uid = vap->va_uid;
if (vap->va_gid == (gid_t)VNOVAL)
gid = de->de_gid;
else
gid = vap->va_gid;
if (uid != de->de_uid || gid != de->de_gid) {
if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid ||
(gid != de->de_gid && !groupmember(gid, ap->a_cred))) &&
(error = suser(ap->a_p)) != 0)
return (error);
de->de_uid = uid;
de->de_gid = gid;
c = 1;
}
if (ap->a_vap->va_gid != (gid_t)VNOVAL) {
de->de_gid = ap->a_vap->va_gid;
if (vap->va_mode != (mode_t)VNOVAL) {
if ((ap->a_cred->cr_uid != de->de_uid) &&
(error = suser(ap->a_p)))
return (error);
de->de_mode = vap->va_mode;
c = 1;
}
if (ap->a_vap->va_mode != (mode_t)VNOVAL) {
de->de_mode = ap->a_vap->va_mode;
if (vap->va_atime.tv_sec != VNOVAL) {
if ((ap->a_cred->cr_uid != de->de_uid) &&
(error = suser(ap->a_p)))
return (error);
de->de_atime = vap->va_atime;
c = 1;
}
if (vap->va_mtime.tv_sec != VNOVAL) {
if ((ap->a_cred->cr_uid != de->de_uid) &&
(error = suser(ap->a_p)))
return (error);
de->de_mtime = vap->va_mtime;
c = 1;
}
if (ap->a_vap->va_atime.tv_sec != VNOVAL)
de->de_atime = ap->a_vap->va_atime;
if (ap->a_vap->va_mtime.tv_sec != VNOVAL)
de->de_mtime = ap->a_vap->va_mtime;
if (c)
getnanotime(&de->de_ctime);