event_conf.c

   1 /*
   2    CTDB event daemon
   3
   4    Copyright (C) Amitay Isaacs  2018
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21 #include "system/filesys.h"
  22 #include "system/dir.h"
  23
  24 #include "lib/util/debug.h"
  25
  26 #include "common/conf.h"
  27 #include "common/path.h"
  28
  29 #include "event/event_conf.h"
  30
  31 static bool event_conf_validate_debug_script(const char *key,
  32                                              const char *old_script,
  33                                              const char *new_script,
  34                                              enum conf_update_mode mode)
  35 {
  36         char script[PATH_MAX];
  37         char script_path[PATH_MAX];
  38         struct stat st;
  39         size_t len;
  40         int ret;
  41
  42         len = strlcpy(script, new_script, sizeof(script));
  43         if (len >= sizeof(script)) {
  44                 D_ERR("debug script name too long\n");
  45                 return false;
  46         }
  47
  48         ret = snprintf(script_path,
  49                        sizeof(script_path),
  50                        "%s/%s",
  51                        path_etcdir(),
  52                        basename(script));
  53         if (ret >= sizeof(script_path)) {
  54                 D_ERR("debug script path too long\n");
  55                 return false;
  56         }
  57
  58         ret = stat(script_path, &st);
  59         if (ret == -1) {
  60                 D_ERR("debug script %s does not exist\n", script_path);
  61                 return false;
  62         }
  63
  64         if (! S_ISREG(st.st_mode)) {
  65                 D_ERR("debug script %s is not a file\n", script_path);
  66                 return false;
  67         }
  68         if (! (st.st_mode & S_IXUSR)) {
  69                 D_ERR("debug script %s is not executable\n", script_path);
  70                 return false;
  71         }
  72
  73         return true;
  74 }
  75
  76 void event_conf_init(struct conf_context *conf)
  77 {
  78         conf_define_section(conf, EVENT_CONF_SECTION, NULL);
  79
  80         conf_define_string(conf,
  81                            EVENT_CONF_SECTION,
  82                            EVENT_CONF_DEBUG_SCRIPT,
  83                            NULL,
  84                            event_conf_validate_debug_script);
  85 }