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, *tmp;
  35     const char *real_display = NULL;
  36     ssize_t path_len;
  37     struct sockaddr_un *addr;
  38
  39     addr = p_new(struct sockaddr_un, 1);
  40     homedir = getenv("HOME");
  41     if(a_strlen(display))
  42     {
  43         if((tmp = strchr(display, ':')))
  44             real_display = tmp + 1;
  45         else
  46             real_display = display;
  47         if((tmp = strrchr(display, '.')))
  48             *tmp = '\0';
  49     }
  50
  51     /* a_strlen(display) because we strcat on display and
  52      * + 2 for / and \0 */
  53     path_len = a_strlen(homedir) + a_strlen(CONTROL_UNIX_SOCKET_PATH)
  54                + (a_strlen(display) ? (a_strlen(real_display)) : 1) + 2;
  55
  56     if(path_len >= ssizeof(addr->sun_path))
  57     {
  58         fprintf(stderr, "error: path of control UNIX domain socket is too long");
  59         return NULL;
  60     }
  61     a_strcpy(addr->sun_path, path_len, homedir);
  62     a_strcat(addr->sun_path, path_len, "/");
  63     a_strcat(addr->sun_path, path_len, CONTROL_UNIX_SOCKET_PATH);
  64     if(a_strlen(display))
  65         a_strcat(addr->sun_path, path_len, real_display);
  66     else
  67         a_strcat(addr->sun_path, path_len, "0");
  68
  69     addr->sun_family = AF_UNIX;
  70
  71     return addr;
  72 }
  73
  74 int
  75 get_client_socket(void)
  76 {
  77     int csfd;
  78
  79     csfd = socket(AF_UNIX, SOCK_DGRAM, 0);
  80
  81     if(csfd < 0)
  82         perror("error opening UNIX domain socket");
  83
  84     return csfd;
  85 }
  86 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80