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/*
Copyright (C) 1993, 1994 Free Software Foundation
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
The GNU Hurd is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Michael I. Bushnell. */
#include "priv.h"
#include "fs_S.h"
#include <sys/stat.h>
#include <fcntlbits.h>
#include <hurd/exec.h>
kern_return_t
diskfs_S_file_exec (struct protid *cred,
task_t task,
int flags,
char *argv,
u_int argvlen,
char *envp,
u_int envplen,
mach_port_t *fds,
u_int fdslen,
mach_port_t *portarray,
u_int portarraylen,
int *intarray,
u_int intarraylen,
mach_port_t *deallocnames,
u_int deallocnameslen,
mach_port_t *destroynames,
u_int destroynameslen)
{
struct node *np;
error_t err;
if (!cred)
return EOPNOTSUPP;
np = cred->po->np;
if ((cred->po->openstat & O_EXEC) == 0)
return EBADF;
if (!((np->dn_stat.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH))
|| ((np->dn_stat.st_mode & S_IUSEUNK)
&& (np->dn_stat.st_mode & (S_IEXEC << S_IUNKSHIFT)))))
return EACCES;
/* Handle S_ISUID and S_ISGID uid substitution. */
/* XXX We should change the auth handle here too. */
if ((((np->dn_stat.st_mode & S_ISUID)
&& !diskfs_isuid (np->dn_stat.st_uid, cred))
|| ((np->dn_stat.st_mode & S_ISGID)
&& !diskfs_groupmember (np->dn_stat.st_gid, cred)))
&& !diskfs_isuid (0, cred))
flags |= EXEC_SECURE|EXEC_NEWTASK;
if (diskfs_access (np, S_IREAD, cred))
flags |= EXEC_NEWTASK;
err = exec_exec (diskfs_exec,
(ports_get_right
(diskfs_make_protid
(diskfs_make_peropen (np, O_READ, cred->po->dotdotport),
cred->uids, cred->nuids, cred->gids, cred->ngids))),
MACH_MSG_TYPE_MAKE_SEND,
task, flags, argv, argvlen, envp, envplen,
fds, MACH_MSG_TYPE_MOVE_SEND, fdslen,
portarray, MACH_MSG_TYPE_MOVE_SEND, portarraylen,
intarray, intarraylen, deallocnames, deallocnameslen,
destroynames, destroynameslen);
mach_port_deallocate (mach_task_self (), task);
return err;
}
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