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116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/* Copyright (c) 2008, 2009
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* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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* Micah Cowan (micah@cowan.name)
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* Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
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* Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
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* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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* Copyright (c) 1987 Oliver Laumann
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING); if not, see
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* https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
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*
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****************************************************************
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*/
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#ifndef SCREEN_ACLS_H
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#define SCREEN_ACLS_H
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#include "os.h"
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/* three known bits: */
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#define ACL_EXEC 0
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#define ACL_WRITE 1
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#define ACL_READ 2
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#define ACL_BITS_PER_CMD 1 /* for comm.h */
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#define ACL_BITS_PER_WIN 3 /* for window.h */
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#define USER_CHUNK 1
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#define ACLBYTE(data, w) ((data)[(w) >> 3])
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#define ACLBIT(w) (0x80 >> ((w) & 7))
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typedef struct Window Window;
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typedef unsigned char * AclBits;
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/*
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* How a user joins a group.
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* Here is the node to construct one list per user.
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*/
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struct aclusergroup
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{
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struct acluser *u; /* the user who borrows us his rights */
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struct aclusergroup *next;
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};
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/***************
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* ==> user.h
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*/
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struct plop {
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char *buf;
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size_t len;
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int enc;
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};
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/*
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* A User has a list of groups, and points to other users.
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* users is the User entry of the session owner (creator)
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* and anchors all other users. Add/Delete users there.
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*/
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typedef struct acluser
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{
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struct acluser *u_next; /* continue the main user list */
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char u_name[MAXLOGINLEN + 1]; /* login name how he showed up */
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int u_detachwin; /* the window where he last detached */
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int u_detachotherwin; /* window that was "other" when he detached */
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int u_Esc, u_MetaEsc; /* the users screen escape character */
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struct plop u_plop;
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int u_id; /* a uniq index in the bitfields. */
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AclBits u_umask_w_bits[ACL_BITS_PER_WIN]; /* his window create umask */
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struct aclusergroup *u_group; /* linked list of pointers to other users */
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} User;
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/* forward declaration */
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struct comm;
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int AclSetPerm (struct acluser *, struct acluser *, char *, char *);
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int AclUmask (struct acluser *, char *, char **);
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int UsersAcl (struct acluser *, int, char **);
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void AclWinSwap (int, int);
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char *DoSu (struct acluser **, char *, char *, char *);
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int AclLinkUser (char *, char *);
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int UserFreeCopyBuffer (struct acluser *);
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struct acluser **FindUserPtr (char *);
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int UserAdd (char *, struct acluser **);
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int UserDel (char *, struct acluser **);
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int AclCheckPermWin(struct acluser *, int, Window *);
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int NewWindowAcl(Window *, struct acluser *);
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void FreeWindowAcl(Window *);
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int AclCheckPermCmd(struct acluser *, int, struct comm *);
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/* global variables */
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extern int DefaultEsc, DefaultMetaEsc;
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extern int maxusercount;
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extern struct acluser *users, *EffectiveAclUser;
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#endif /* SCREEN_ACLS_H */
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