action.c

   1 /*
   2  *  (C) Copyright 2009 ZeXx86 (zexx86@gmail.com)
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  *   Based on GLugin http://exa.czweb.org/repos/glugin.tar.bz2
  19  *   Big thanks for "exa"
  20  */
  21
  22
  23 #include <stdio.h>
  24 #include <ctype.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <sys/types.h>
  29 #include <sys/socket.h>
  30 #include <sys/un.h>
  31 #include "glugin.h"
  32
  33
  34 int plugin_action_0 (pluginData *pd)
  35 {
  36         Log ("action_0");
  37
  38         return creat ("/tmp/.arenalivep", 0777);
  39 }
  40
  41 int plugin_action_1 (pluginData *pd)
  42 {
  43         int s, s2, t, l;
  44         struct sockaddr_un local, remote;
  45
  46         if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) == -1) {
  47                 Log ("socket == -1");
  48                 return -1;
  49         }
  50
  51         local.sun_family = AF_UNIX;
  52         strcpy (local.sun_path, "/tmp/.arenalive");
  53         unlink (local.sun_path);
  54
  55         l = strlen (local.sun_path) + sizeof (local.sun_family);
  56
  57         if (bind (s, (struct sockaddr *) &local, l) == -1) {
  58                 Log ("bind == -1");
  59                 return -1;
  60         }
  61
  62         if (listen (s, 5) == -1)
  63                 return -1;
  64
  65         t = sizeof (remote);
  66
  67         pid_t child = fork ();
  68
  69         if (child == -1)
  70                 return -1;
  71
  72         if (!child) {
  73                 char *user = getenv ("USER");
  74
  75                 if (!user)
  76                         return -1;
  77
  78                 if (strlen (user) > 32) {
  79                         Log ("ERROR -> env USER - too long");
  80                         _exit (0);
  81                 }
  82
  83                 unsigned l = strlen (pd->conparam);
  84                 if (l > 256) {
  85                         Log ("ERROR -> pd->conparam - too long");
  86                         _exit (0);
  87                 }
  88
  89                 conparam_verify (pd->conparam, l);
  90
  91                 /* prevent before multiple instances */
  92                 system ("killall arenalive-linux -s9");
  93
  94                 char cmd[512];
  95
  96                 // ~80 + 3*32 + 128 + 15 < 512 chars
  97                 snprintf (cmd, 511, "LD_LIBRARY_PATH=/home/%s/.arenalive/ /home/%s/.arenalive/%s %s &> /home/%s/.arenalive/log",
  98                         user, user, "arenalive-linux", pd->conparam, user);
  99
 100                 Log ("-- %s", cmd);
 101
 102                 system (cmd);
 103
 104                 _exit (0);
 105         }
 106
 107         if ((s2 = accept (s, (struct sockaddr *) &remote, (unsigned *) &t)) == -1) {
 108                 Log ("accept == -1");
 109                 return -1;
 110         }
 111
 112         char str[sizeof (Window)+1];
 113
 114         memcpy (str, &pd->win, sizeof (Window));
 115
 116         if (send (s2, str, sizeof (Window), 0) < 0)
 117                 return -1;
 118
 119         close (s2);
 120
 121         /* plugin loop */
 122         glugin_proc (pd);
 123
 124         return 0;
 125 }
 126
 127 int plugin_action (pluginData *pd)
 128 {
 129         switch (pd->action) {
 130                 case 0:
 131                         return plugin_action_0 (pd);
 132                 case 1:
 133                         return plugin_action_1 (pd);
 134         }
 135
 136         return -1;
 137 }
 138