awesome-client-common.c

   1 /*
   2  * awesome-client-common.c - awesome client, communicate with socket, common functions
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   5  * Copyright © 2007 daniel@brinkers.de
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  */
  22
  23 #include <sys/socket.h>
  24 #include <sys/un.h>
  25
  26 #include "awesome-client.h"
  27 #include "util.h"
  28
  29 #define CONTROL_UNIX_SOCKET_PATH ".awesome_ctl."
  30
  31 struct sockaddr_un *
  32 get_client_addr(const char *display)
  33 {
  34     char *homedir;
  35     ssize_t path_len;
  36     struct sockaddr_un *addr;
  37
  38     addr = p_new(struct sockaddr_un, 1);
  39     homedir = getenv("HOME");
  40     path_len = a_strlen(homedir) + a_strlen(CONTROL_UNIX_SOCKET_PATH) + a_strlen(display) + 2;
  41     if(path_len >= ssizeof(addr->sun_path))
  42     {
  43         fprintf(stderr, "error: path of control UNIX domain socket is too long");
  44         return NULL;
  45     }
  46     a_strcpy(addr->sun_path, path_len, homedir);
  47     a_strcat(addr->sun_path, path_len, "/");
  48     a_strcat(addr->sun_path, path_len, CONTROL_UNIX_SOCKET_PATH);
  49     if(display)
  50         a_strcat(addr->sun_path, path_len, display + 1);
  51     else
  52         a_strcat(addr->sun_path, path_len, "0");
  53
  54     addr->sun_family = AF_UNIX;
  55
  56     return addr;
  57 }
  58
  59 int
  60 get_client_socket(void)
  61 {
  62     int csfd;
  63
  64     csfd = socket(AF_UNIX, SOCK_DGRAM, 0);
  65
  66     if(csfd < 0)
  67         perror("error opening UNIX domain socket");
  68
  69     return csfd;
  70 }