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authorRoland McGrath <roland@gnu.org>1995-12-22 10:00:21 +0000
committerRoland McGrath <roland@gnu.org>1995-12-22 10:00:21 +0000
commit975320984b9f9fa6742136447ec82e7e304d83fd (patch)
tree6638c381441825ac81f4f9355eba25fd8863c7f9 /sysdeps/mach/hurd/setreuid.c
parente3fa2641f4f296230aa2607f0df9d71ab3f9c7af (diff)
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Fri Dec 22 00:57:38 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>cvs/libc-951222
* sysdeps/mach/hurd/setuid.c: Rewrote ID frobnication to do the right thing. * sysdeps/mach/hurd/setgid.c: Likewise. * sysdeps/mach/hurd/setreuid.c: Likewise. * sysdeps/mach/hurd/setregid.c: Likewise. * sysdeps/mach/hurd/setegid.c: Likewise. * sysdeps/mach/hurd/seteuid.c: Likewise. * sysdeps/mach/hurd/fork.c: Peek __mach_task_self_ value before proc_dostop call to work around kernel paging bug. Thu Dec 21 12:19:32 1995 Miles Bader <miles@gnu.ai.mit.edu> * sysdeps/mach/hurd/setuid.c (__setuid): Actually add the new uid instead of putting it (and other uids) in the gids and leaving the old uids as is.
Diffstat (limited to 'sysdeps/mach/hurd/setreuid.c')
-rw-r--r--sysdeps/mach/hurd/setreuid.c44
1 files changed, 35 insertions, 9 deletions
diff --git a/sysdeps/mach/hurd/setreuid.c b/sysdeps/mach/hurd/setreuid.c
index 1dcbf0ee82..530e4a20c7 100644
--- a/sysdeps/mach/hurd/setreuid.c
+++ b/sysdeps/mach/hurd/setreuid.c
@@ -39,19 +39,45 @@ __setreuid (uid_t ruid, uid_t euid)
/* Make a new auth handle which has RUID as the real uid,
and EUID as the first element in the list of effective uids. */
- size_t ngen = _hurd_id.gen.nuids < 1 ? 1 : _hurd_id.gen.nuids;
- size_t naux = _hurd_id.aux.nuids < 1 ? 1 : _hurd_id.aux.nuids;
- uid_t newaux[naux], newgen[ngen];
+ uid_t *newgen, *newaux;
+ size_t ngen, naux;
- newgen[0] = euid;
- memcpy (&newgen[1], _hurd_id.gen.uids, (ngen - 1) * sizeof (uid_t));
- newaux[0] = ruid;
- memcpy (&newaux[1], _hurd_id.aux.uids, (naux - 1) * sizeof (uid_t));
+ newgen = _hurd_id.gen.uids;
+ ngen = _hurd_id.gen.nuids;
+ if (euid != -1)
+ {
+ if (_hurd_id.gen.nuids == 0)
+ {
+ /* No effective uids now. The new set will be just UID. */
+ newgen = &euid;
+ ngen = 1;
+ }
+ else
+ {
+ _hurd_id.gen.uids[0] = euid;
+ _hurd_id.valid = 0;
+ }
+ }
+
+ newaux = _hurd_id.aux.uids;
+ naux = _hurd_id.aux.nuids;
+ if (ruid != -1)
+ {
+ if (_hurd_id.aux.nuids == 0)
+ {
+ newaux = &ruid;
+ naux = 1;
+ }
+ else
+ {
+ _hurd_id.aux.uids[0] = ruid;
+ _hurd_id.valid = 0;
+ }
+ }
err = __USEPORT (AUTH, __auth_makeauth
(port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
- newgen, ngen,
- newaux, naux,
+ newgen, ngen, newaux, naux,
_hurd_id.gen.gids, _hurd_id.gen.ngids,
_hurd_id.aux.gids, _hurd_id.aux.ngids,
&newauth));