mdw@git.distorted.org.uk Git - checkpath/blob - checkpath.h

   1 /* -*-c-*-
   2  *
   3  * $Id: checkpath.h,v 1.3 2003/01/25 23:58:44 mdw Exp $
   4  *
   5  * Check a path for safety
   6  *
   7  * (c) 1999 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of chkpath.
  13  *
  14  * chkpath is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * chkpath is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with chkpath; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: checkpath.h,v $
  32  * Revision 1.3  2003/01/25 23:58:44  mdw
  33  * Make guts into official library.
  34  *
  35  * Revision 1.2  2001/01/25 22:16:02  mdw
  36  * Make flags be unsigned.
  37  *
  38  * Revision 1.1.1.1  1999/04/06 20:12:07  mdw
  39  * Import new project.
  40  *
  41  */
  42
  43 #ifndef CHECKPATH_H
  44 #define CHECKPATH_H
  45
  46 #ifdef __cplusplus
  47   extern "C" {
  48 #endif
  49
  50 /*----- Header files ------------------------------------------------------*/
  51
  52 #include <limits.h>
  53 #include <sys/types.h>
  54
  55 /*----- Data structures ---------------------------------------------------*/
  56
  57 /* --- Search request --- *
  58  *
  59  * This contains parameters from the caller to control what problems are
  60  * looked for, and what to do when they're found.
  61  */
  62
  63 struct checkpath {
  64   uid_t cp_uid;                         /* Uid that's considered OK */
  65   gid_t cp_gid[NGROUPS_MAX + 1];        /* Array of groups that are OK */
  66   int cp_gids;                          /* Number of groups in the array */
  67   int cp_verbose;                       /* Verbosity level to spit up */
  68   unsigned cp_what;                     /* What things to check for */
  69   void (*cp_report)(unsigned /*what*/, int /*verb*/,
  70                     const char */*dir*/, const char */*msg*/,
  71                     void */*p*/);
  72   void *cp_arg;                         /* Argument for cp_report */
  73 };
  74
  75 /* --- Flags for `@what@' fields in the above --- */
  76
  77 /* Problem types */
  78 #define CP_PROBLEMS 0x1fu               /* Mask of problem bits */
  79 #define CP_ERROR 0x01u                  /* Error report */
  80 #define CP_WRWORLD 0x02u                /* Check write by world */
  81 #define CP_WRGRP 0x04u                  /* Check write by any group */
  82 #define CP_WROTHGRP 0x08u               /* Check write by other group */
  83 #define CP_WROTHUSR 0x10u               /* Check write by other user */
  84
  85 /* Other flags */
  86 #define CP_SYMLINK 0x100u               /* Report symbolic links */
  87 #define CP_REPORT 0x200u                /* Make user-readable reports */
  88 #define CP_STICKYOK 0x400u              /* Don't care if sticky is set */
  89
  90 /*----- Functions provided ------------------------------------------------*/
  91
  92 /* --- @checkpath@ --- *
  93  *
  94  * Arguments:   @const char *p@ = directory name which needs checking
  95  *              @const struct checkpath *cp@ = parameters for the check
  96  *
  97  * Returns:     Zero if all is well, otherwise bitmask of problems.
  98  *
  99  * Use:         Scrutinises a directory path to see what evil things other
 100  *              users could do to it.
 101  */
 102
 103 extern unsigned checkpath(const char */*p*/, const struct checkpath */*cp*/);
 104
 105 /* --- @checkpath_setids@ --- *
 106  *
 107  * Arguments:   @struct checkpath *cp@ = pointer to block to fill in
 108  *
 109  * Returns:     ---
 110  *
 111  * Use:         Fills in the user ids and things in the structure.
 112  */
 113
 114 extern void checkpath_setids(struct checkpath */*cp*/);
 115
 116 /*----- That's all, folks -------------------------------------------------*/
 117
 118 #ifdef __cplusplus
 119   }
 120 #endif
 121
 122 #endif