usr/src/lib/libproc/common/proc_set.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "libproc.h"
  30 #include <alloca.h>
  31 #include <string.h>
  32
  33 /*
  34  * Convenience wrapper to set the cred attributes of a victim process
  35  * to a set of new values. Caller must supply a prochandle and a
  36  * fully populated prcred structure.
  37  */
  38 int
  39 Psetcred(struct ps_prochandle *Pr, const prcred_t *credp)
  40 {
  41         int ngrp;
  42         int ctlsize;
  43         struct {
  44                 long cmd;
  45                 prcred_t cred;
  46         } *ctlp;
  47
  48         if (Pr == NULL || credp == NULL)
  49                 return (-1);
  50
  51         ngrp = credp->pr_ngroups;
  52         ctlsize = sizeof (prcred_t) + (ngrp - 1) * sizeof (gid_t);
  53         ctlp = alloca(ctlsize + sizeof (long));
  54
  55         ctlp->cmd = PCSCREDX;
  56         (void) memcpy(&ctlp->cred, credp, ctlsize);
  57
  58         if (write(Pctlfd(Pr), ctlp, sizeof (long) + ctlsize) < 0)
  59                 return (-1);
  60
  61         return (0);
  62 }
  63
  64 /*
  65  * Convenience wrapper to set the zoneid attribute of a victim process to a new
  66  * value (only to and from GLOBAL_ZONEID makes sense).  Caller must supply a
  67  * prochandle and a valid zoneid.
  68  */
  69 int
  70 Psetzoneid(struct ps_prochandle *Pr, zoneid_t zoneid)
  71 {
  72         struct {
  73                 long cmd;
  74                 long zoneid;
  75         } ctl;
  76
  77         if (Pr == NULL)
  78                 return (-1);
  79
  80         ctl.zoneid = zoneid;
  81         ctl.cmd = PCSZONE;
  82
  83         if (write(Pctlfd(Pr), &ctl, sizeof (ctl)) < 0)
  84                 return (-1);
  85         return (0);
  86 }