src/acls.h

   1 /* Copyright (c) 2008, 2009
   2  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   3  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   4  *      Micah Cowan (micah@cowan.name)
   5  *      Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
   6  * Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
   7  *      Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
   8  *      Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
   9  * Copyright (c) 1987 Oliver Laumann
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 3, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program (see the file COPYING); if not, see
  23  * http://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
  24  * 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  25  *
  26  ****************************************************************
  27  */
  28
  29 #ifdef MULTIUSER
  30
  31 /* three known bits: */
  32 #define ACL_EXEC 0
  33 #define ACL_WRITE 1
  34 #define ACL_READ 2
  35
  36 #define ACL_BITS_PER_CMD 1      /* for comm.h */
  37 #define ACL_BITS_PER_WIN 3      /* for window.h */
  38
  39 #define USER_CHUNK 8
  40
  41 #define ACLBYTE(data, w)   ((data)[(w) >> 3])
  42 #define ACLBIT(w)   (0x80 >> ((w) & 7))
  43
  44 typedef unsigned char * AclBits;
  45
  46 /*
  47  * How a user joins a group.
  48  * Here is the node to construct one list per user.
  49  */
  50 struct aclusergroup
  51 {
  52   struct acluser *u;    /* the user who borrows us his rights */
  53   struct aclusergroup *next;
  54 };
  55 #endif /* MULTIUSER */
  56
  57 /***************
  58  *  ==> user.h
  59  */
  60
  61 /*
  62  * a copy buffer
  63  */
  64 struct plop
  65 {
  66   char *buf;
  67   int len;
  68 #ifdef ENCODINGS
  69   int enc;
  70 #endif
  71 };
  72
  73 /*
  74  * A User has a list of groups, and points to other users.
  75  * users is the User entry of the session owner (creator)
  76  * and anchors all other users. Add/Delete users there.
  77  */
  78 typedef struct acluser
  79 {
  80   struct acluser *u_next;               /* continue the main user list */
  81   char u_name[20+1];            /* login name how he showed up */
  82   char *u_password;             /* his password (may be NullStr). */
  83   int  u_checkpassword;         /* nonzero if this u_password is valid */
  84   int  u_detachwin;             /* the window where he last detached */
  85   int  u_detachotherwin;        /* window that was "other" when he detached */
  86   int  u_Esc, u_MetaEsc;        /* the users screen escape character */
  87 #ifdef COPY_PASTE
  88   struct plop u_plop;
  89 #endif
  90 #ifdef MULTIUSER
  91   int u_id;                     /* a uniq index in the bitfields. */
  92   AclBits u_umask_w_bits[ACL_BITS_PER_WIN];     /* his window create umask */
  93   struct aclusergroup *u_group; /* linked list of pointers to other users */
  94 #endif
  95 } User;
  96
  97 extern int DefaultEsc, DefaultMetaEsc;
  98