contrib/amd/hlfsd/hlfsd.h

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1989 Jan-Simon Pendry
   4  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1989 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Jan-Simon Pendry at Imperial College, London.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgment:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      %W% (Berkeley) %G%
  40  *
  41  * $Id: hlfsd.h,v 1.2 1999/01/10 21:54:32 ezk Exp $
  42  *
  43  * HLFSD was written at Columbia University Computer Science Department, by
  44  * Erez Zadok <ezk@cs.columbia.edu> and Alexander Dupuy <dupuy@cs.columbia.edu>
  45  * It is being distributed under the same terms and conditions as amd does.
  46  */
  47
  48 #ifndef _HLFSD_HLFS_H
  49 #define _HLFSD_HLFS_H
  50
  51 /*
  52  * MACROS AND CONSTANTS:
  53  */
  54
  55 #define HLFSD_VERSION   "hlfsd 1.1 (March 4, 1997-1999)"
  56 #define PERS_SPOOLMODE  0755
  57 #define OPEN_SPOOLMODE  01777
  58 #define DOTSTRING       "."
  59
  60 /*
  61  * ROOTID and SLINKID are the fixed "faked" node IDs (inodes) for
  62  * the '.' (also '..') and the one symlink within the hlfs.
  63  * They must always be unique, and should never match what a UID
  64  * could be.
  65  * They used to be -1 and -2, respectively.
  66  *
  67  * I used to cast these to (uid_t) but it failed to compile
  68  * with /opt/SUNWspro/bin/cc because uid_t is long, while struct fattr's
  69  * uid field is u_int.  Then it failed to compile on some linux systems
  70  * which define uid_t to be unsigned short, so I used the lowest common
  71  * size which is unsigned short.
  72  */
  73 #ifdef EXPERIMENTAL_UID_SIZE
  74 #define UID_SHIFT       30
  75 # define ROOTID         ((1 << UID_SHIFT) - 1)
  76 # define SLINKID        ((1 << UID_SHIFT) - 2)
  77 # define INVALIDID      ((1 << UID_SHIFT) - 3)
  78 #else /* not EXPERIMENTAL_UID_SIZE */
  79 /*
  80  * XXX: this will cause problems to systems with UIDs greater than
  81  * MAX_UNSIGNED_SHORT-3.
  82  */
  83 # define ROOTID         (((unsigned short) ~0) - 1)
  84 # define SLINKID        (((unsigned short) ~0) - 2)
  85 # define INVALIDID      (((unsigned short) ~0) - 3)
  86 #endif /* not EXPERIMENTAL_UID_SIZE */
  87
  88
  89 #define DOTCOOKIE       1
  90 #define DOTDOTCOOKIE    2
  91 #define SLINKCOOKIE     3
  92
  93 #define ALT_SPOOLDIR "/var/hlfs" /* symlink to use if others fail */
  94 #define HOME_SUBDIR ".hlfsdir"  /* dirname in user's home dir */
  95 #define DEFAULT_DIRNAME "/hlfs/home"
  96 #define DEFAULT_INTERVAL 900    /* secs b/t re-reads of the password maps */
  97 #define DEFAULT_CACHE_INTERVAL 300 /* secs during which assume a link is up */
  98 #define DEFAULT_HLFS_GROUP      "hlfs"  /* Group name for special hlfs_gid */
  99
 100 #define PROGNAMESZ      (MAXHOSTNAMELEN - 5)
 101
 102 #ifdef HAVE_SYSLOG
 103 # define DEFAULT_LOGFILE "syslog"
 104 #else /* not HAVE)_SYSLOG */
 105 # define DEFAULT_LOGFILE 0
 106 #endif /* not HAVE)_SYSLOG */
 107
 108 #define ERRM ": %m"
 109 #define fatalerror(str) \
 110   (fatal (strcat (strnsave ((str), strlen ((str)) + sizeof (ERRM) - 1), ERRM)))
 111
 112 /*
 113  * TYPEDEFS:
 114  */
 115 typedef struct uid2home_t uid2home_t;
 116 typedef struct username2uid_t username2uid_t;
 117
 118
 119 /*
 120  * STRUCTURES:
 121  */
 122 struct uid2home_t {
 123   uid_t uid;                    /* XXX: with or without UID_OFFSET? */
 124   pid_t child;
 125   char *home;                   /* really allocated */
 126   char *uname;                  /* an xref ptr to username2uid_t->username */
 127   u_long last_access_time;
 128   int last_status;              /* 0=used $HOME/.hlfsspool; !0=used alt dir */
 129 };
 130
 131 struct username2uid_t {
 132   char *username;               /* really allocated */
 133   uid_t uid;                    /* XXX: with or without UID_OFFSET? */
 134   char *home;                   /* an xref ptr to uid2home_t->home */
 135 };
 136
 137 /*
 138  * EXTERNALS:
 139  */
 140 extern RETSIGTYPE cleanup(int);
 141 extern RETSIGTYPE interlock(int);
 142 extern SVCXPRT *nfs_program_2_transp;   /* For quick_reply() */
 143 extern SVCXPRT *nfsxprt;
 144 extern char *alt_spooldir;
 145 extern char *home_subdir;
 146 extern char *homedir(int);
 147 extern char *mailbox(int, char *);
 148 extern char *passwdfile;
 149 extern char *slinkname;
 150 extern char mboxfile[];
 151 extern gid_t hlfs_gid;
 152 extern int cache_interval;
 153 extern int noverify;
 154 extern int serverpid;
 155 extern int untab_index(char *username);
 156 extern am_nfs_fh *root_fhp;
 157 extern am_nfs_fh root;
 158 extern nfstime startup;
 159 extern uid2home_t *plt_search(int);
 160 extern username2uid_t *untab;   /* user name table */
 161 extern void fatal(char *);
 162 extern void plt_init(void);
 163 extern void hlfsd_init_filehandles(void);
 164
 165 #if defined(DEBUG) || defined(DEBUG_PRINT)
 166 extern void plt_dump(uid2home_t *, pid_t);
 167 extern void plt_print(int);
 168 #endif /* defined(DEBUG) || defined(DEBUG_PRINT) */
 169
 170 #endif /* _HLFSD_HLFS_H */