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

   1 /* -*-c-*-
   2  *
   3  * $Id: checkpath.h,v 1.4 2004/04/08 01:36:22 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 #ifndef CHECKPATH_H
  30 #define CHECKPATH_H
  31
  32 #ifdef __cplusplus
  33   extern "C" {
  34 #endif
  35
  36 /*----- Header files ------------------------------------------------------*/
  37
  38 #include <limits.h>
  39 #include <sys/types.h>
  40
  41 /*----- Data structures ---------------------------------------------------*/
  42
  43 /* --- Search request --- *
  44  *
  45  * This contains parameters from the caller to control what problems are
  46  * looked for, and what to do when they're found.
  47  */
  48
  49 struct checkpath {
  50   uid_t cp_uid;                         /* Uid that's considered OK */
  51   gid_t cp_gid[NGROUPS_MAX + 1];        /* Array of groups that are OK */
  52   int cp_gids;                          /* Number of groups in the array */
  53   int cp_verbose;                       /* Verbosity level to spit up */
  54   unsigned cp_what;                     /* What things to check for */
  55   void (*cp_report)(unsigned /*what*/, int /*verb*/,
  56                     const char */*dir*/, const char */*msg*/,
  57                     void */*p*/);
  58   void *cp_arg;                         /* Argument for cp_report */
  59 };
  60
  61 /* --- Flags for `@what@' fields in the above --- */
  62
  63 /* Problem types */
  64 #define CP_PROBLEMS 0x1fu               /* Mask of problem bits */
  65 #define CP_ERROR 0x01u                  /* Error report */
  66 #define CP_WRWORLD 0x02u                /* Check write by world */
  67 #define CP_WRGRP 0x04u                  /* Check write by any group */
  68 #define CP_WROTHGRP 0x08u               /* Check write by other group */
  69 #define CP_WROTHUSR 0x10u               /* Check write by other user */
  70
  71 /* Other flags */
  72 #define CP_SYMLINK 0x100u               /* Report symbolic links */
  73 #define CP_REPORT 0x200u                /* Make user-readable reports */
  74 #define CP_STICKYOK 0x400u              /* Don't care if sticky is set */
  75
  76 /*----- Functions provided ------------------------------------------------*/
  77
  78 /* --- @checkpath@ --- *
  79  *
  80  * Arguments:   @const char *p@ = directory name which needs checking
  81  *              @const struct checkpath *cp@ = parameters for the check
  82  *
  83  * Returns:     Zero if all is well, otherwise bitmask of problems.
  84  *
  85  * Use:         Scrutinises a directory path to see what evil things other
  86  *              users could do to it.
  87  */
  88
  89 extern unsigned checkpath(const char */*p*/, const struct checkpath */*cp*/);
  90
  91 /* --- @checkpath_setids@ --- *
  92  *
  93  * Arguments:   @struct checkpath *cp@ = pointer to block to fill in
  94  *
  95  * Returns:     ---
  96  *
  97  * Use:         Fills in the user ids and things in the structure.
  98  */
  99
 100 extern void checkpath_setids(struct checkpath */*cp*/);
 101
 102 /*----- That's all, folks -------------------------------------------------*/
 103
 104 #ifdef __cplusplus
 105   }
 106 #endif
 107
 108 #endif