source4/lib/util/capability.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 1998-2002
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 /**
  23  * @file
  24  * @brief Capabilities functions
  25  **/
  26
  27 /*
  28   capabilities fns - will be needed when we enable kernel oplocks
  29 */
  30
  31 #include "includes.h"
  32 #include "system/network.h"
  33 #include "system/wait.h"
  34 #include "system/filesys.h"
  35
  36
  37 #if defined(HAVE_IRIX_SPECIFIC_CAPABILITIES)
  38 /**************************************************************************
  39  Try and abstract process capabilities (for systems that have them).
  40 ****************************************************************************/
  41 static BOOL set_process_capability( uint32_t cap_flag, BOOL enable )
  42 {
  43         if(cap_flag == KERNEL_OPLOCK_CAPABILITY) {
  44                 cap_t cap = cap_get_proc();
  45
  46                 if (cap == NULL) {
  47                         DEBUG(0,("set_process_capability: cap_get_proc failed. Error was %s\n",
  48                                 strerror(errno)));
  49                         return False;
  50                 }
  51
  52                 if(enable)
  53                         cap->cap_effective |= CAP_NETWORK_MGT;
  54                 else
  55                         cap->cap_effective &= ~CAP_NETWORK_MGT;
  56
  57                 if (cap_set_proc(cap) == -1) {
  58                         DEBUG(0,("set_process_capability: cap_set_proc failed. Error was %s\n",
  59                                 strerror(errno)));
  60                         cap_free(cap);
  61                         return False;
  62                 }
  63
  64                 cap_free(cap);
  65
  66                 DEBUG(10,("set_process_capability: Set KERNEL_OPLOCK_CAPABILITY.\n"));
  67         }
  68         return True;
  69 }
  70
  71 /**************************************************************************
  72  Try and abstract inherited process capabilities (for systems that have them).
  73 ****************************************************************************/
  74
  75 static BOOL set_inherited_process_capability( uint32_t cap_flag, BOOL enable )
  76 {
  77         if(cap_flag == KERNEL_OPLOCK_CAPABILITY) {
  78                 cap_t cap = cap_get_proc();
  79
  80                 if (cap == NULL) {
  81                         DEBUG(0,("set_inherited_process_capability: cap_get_proc failed. Error was %s\n",
  82                                 strerror(errno)));
  83                         return False;
  84                 }
  85
  86                 if(enable)
  87                         cap->cap_inheritable |= CAP_NETWORK_MGT;
  88                 else
  89                         cap->cap_inheritable &= ~CAP_NETWORK_MGT;
  90
  91                 if (cap_set_proc(cap) == -1) {
  92                         DEBUG(0,("set_inherited_process_capability: cap_set_proc failed. Error was %s\n",
  93                                 strerror(errno)));
  94                         cap_free(cap);
  95                         return False;
  96                 }
  97
  98                 cap_free(cap);
  99
 100                 DEBUG(10,("set_inherited_process_capability: Set KERNEL_OPLOCK_CAPABILITY.\n"));
 101         }
 102         return True;
 103 }
 104 #endif
 105
 106 /****************************************************************************
 107  Gain the oplock capability from the kernel if possible.
 108 ****************************************************************************/
 109
 110 _PUBLIC_ void oplock_set_capability(BOOL this_process, BOOL inherit)
 111 {
 112 #if HAVE_KERNEL_OPLOCKS_IRIX
 113         set_process_capability(KERNEL_OPLOCK_CAPABILITY,this_process);
 114         set_inherited_process_capability(KERNEL_OPLOCK_CAPABILITY,inherit);
 115 #endif
 116 }
 117