git.tinc-vpn.org Git - tinc/blob - src/names.c

   1 /*
   2     names.c -- generate commonly used (file)names
   3     Copyright (C) 1998-2005 Ivo Timmermans
   4                   2000-2017 Guus Sliepen <guus@tinc-vpn.org>
   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 2 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 along
  17     with this program; if not, write to the Free Software Foundation, Inc.,
  18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "system.h"
  22
  23 #include "logger.h"
  24 #include "names.h"
  25 #include "xalloc.h"
  26
  27 char *netname = NULL;
  28 char *myname = NULL;
  29 char *confdir = NULL;           /* base configuration directory */
  30 char *confbase = NULL;          /* base configuration directory for this instance of tinc */
  31 bool confbase_given;
  32 char *identname = NULL;         /* program name for syslog */
  33 char *unixsocketname = NULL;    /* UNIX socket location */
  34 char *logfilename = NULL;       /* log file location */
  35 char *pidfilename = NULL;
  36 char *program_name = NULL;
  37
  38 /*
  39   Set all files and paths according to netname
  40 */
  41 void make_names(bool daemon) {
  42 #ifdef HAVE_MINGW
  43         HKEY key;
  44         char installdir[1024] = "";
  45         DWORD len = sizeof(installdir);
  46 #endif
  47         confbase_given = confbase;
  48
  49         if(netname && confbase) {
  50                 logger(DEBUG_ALWAYS, LOG_INFO, "Both netname and configuration directory given, using the latter...");
  51         }
  52
  53         if(netname) {
  54                 xasprintf(&identname, "tinc.%s", netname);
  55         } else {
  56                 identname = xstrdup("tinc");
  57         }
  58
  59 #ifdef HAVE_MINGW
  60
  61         if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
  62                 if(!RegQueryValueEx(key, NULL, 0, 0, (LPBYTE)installdir, &len)) {
  63                         confdir = xstrdup(installdir);
  64
  65                         if(!confbase) {
  66                                 if(netname) {
  67                                         xasprintf(&confbase, "%s" SLASH "%s", installdir, netname);
  68                                 } else {
  69                                         xasprintf(&confbase, "%s", installdir);
  70                                 }
  71                         }
  72
  73                         if(!logfilename) {
  74                                 xasprintf(&logfilename, "%s" SLASH "tinc.log", confbase);
  75                         }
  76                 }
  77
  78                 RegCloseKey(key);
  79         }
  80
  81 #endif
  82
  83         if(!confdir) {
  84                 confdir = xstrdup(CONFDIR SLASH "tinc");
  85         }
  86
  87         if(!confbase) {
  88                 if(netname) {
  89                         xasprintf(&confbase, CONFDIR SLASH "tinc" SLASH "%s", netname);
  90                 } else {
  91                         xasprintf(&confbase, CONFDIR SLASH "tinc");
  92                 }
  93         }
  94
  95 #ifdef HAVE_MINGW
  96
  97         if(!logfilename) {
  98                 xasprintf(&logfilename, "%s" SLASH "log", confbase);
  99         }
 100
 101         if(!pidfilename) {
 102                 xasprintf(&pidfilename, "%s" SLASH "pid", confbase);
 103         }
 104
 105 #else
 106         bool fallback = false;
 107
 108         if(daemon) {
 109                 if(access(LOCALSTATEDIR, R_OK | W_OK | X_OK)) {
 110                         fallback = true;
 111                 }
 112         } else {
 113                 char fname[PATH_MAX];
 114                 snprintf(fname, sizeof(fname), LOCALSTATEDIR SLASH "run" SLASH "%s.pid", identname);
 115
 116                 if(access(fname, R_OK)) {
 117                         snprintf(fname, sizeof(fname), "%s" SLASH "pid", confbase);
 118
 119                         if(!access(fname, R_OK)) {
 120                                 fallback = true;
 121                         }
 122                 }
 123         }
 124
 125         if(!fallback) {
 126                 if(!logfilename) {
 127                         xasprintf(&logfilename, LOCALSTATEDIR SLASH "log" SLASH "%s.log", identname);
 128                 }
 129
 130                 if(!pidfilename) {
 131                         xasprintf(&pidfilename, LOCALSTATEDIR SLASH "run" SLASH "%s.pid", identname);
 132                 }
 133         } else {
 134                 if(!logfilename) {
 135                         xasprintf(&logfilename, "%s" SLASH "log", confbase);
 136                 }
 137
 138                 if(!pidfilename) {
 139                         if(daemon) {
 140                                 logger(DEBUG_ALWAYS, LOG_WARNING, "Could not access " LOCALSTATEDIR SLASH " (%s), storing pid and socket files in %s" SLASH, strerror(errno), confbase);
 141                         }
 142
 143                         xasprintf(&pidfilename, "%s" SLASH "pid", confbase);
 144                 }
 145         }
 146
 147 #endif
 148
 149         if(!unixsocketname) {
 150                 int len = strlen(pidfilename);
 151                 unixsocketname = xmalloc(len + 8);
 152                 memcpy(unixsocketname, pidfilename, len);
 153
 154                 if(len > 4 && !strcmp(pidfilename + len - 4, ".pid")) {
 155                         strncpy(unixsocketname + len - 4, ".socket", 8);
 156                 } else {
 157                         strncpy(unixsocketname + len, ".socket", 8);
 158                 }
 159         }
 160 }
 161
 162 void free_names(void) {
 163         free(identname);
 164         free(netname);
 165         free(unixsocketname);
 166         free(pidfilename);
 167         free(logfilename);
 168         free(confbase);
 169         free(confdir);
 170         free(myname);
 171
 172         identname = NULL;
 173         netname = NULL;
 174         unixsocketname = NULL;
 175         pidfilename = NULL;
 176         logfilename = NULL;
 177         confbase = NULL;
 178         confdir = NULL;
 179         myname = NULL;
 180 }