awesome-client-common.c

   1 /*
   2  * awesome-client-common.c - awesome client, communicate with socket, common functions
   3  *
   4  * Copyright © 2007-2008 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 <stdio.h>
  24 #include <sys/socket.h>
  25 #include <sys/un.h>
  26
  27 #include "awesome-client.h"
  28 #include "util.h"
  29
  30 #define CONTROL_UNIX_SOCKET_PATH ".awesome_ctl."
  31
  32 struct sockaddr_un *
  33 get_client_addr(const char *display)
  34 {
  35     char *homedir, *tmp;
  36     const char *real_display = NULL;
  37     ssize_t path_len;
  38     struct sockaddr_un *addr;
  39
  40     addr = p_new(struct sockaddr_un, 1);
  41     homedir = getenv("HOME");
  42     if(a_strlen(display))
  43     {
  44         if((tmp = strchr(display, ':')))
  45             real_display = tmp + 1;
  46         else
  47             real_display = display;
  48         if((tmp = strrchr(display, '.')))
  49             *tmp = '\0';
  50     }
  51
  52     /* a_strlen(display) because we strcat on display and
  53      * + 2 for / and \0 */
  54     path_len = a_strlen(homedir) + a_strlen(CONTROL_UNIX_SOCKET_PATH)
  55                + (a_strlen(display) ? (a_strlen(real_display)) : 1) + 2;
  56
  57     if(path_len >= ssizeof(addr->sun_path))
  58     {
  59         fprintf(stderr, "error: path of control UNIX domain socket is too long");
  60         return NULL;
  61     }
  62     a_strcpy(addr->sun_path, path_len, homedir);
  63     a_strcat(addr->sun_path, path_len, "/");
  64     a_strcat(addr->sun_path, path_len, CONTROL_UNIX_SOCKET_PATH);
  65     if(a_strlen(display))
  66         a_strcat(addr->sun_path, path_len, real_display);
  67     else
  68         a_strcat(addr->sun_path, path_len, "0");
  69
  70     addr->sun_family = AF_UNIX;
  71
  72     return addr;
  73 }
  74
  75 int
  76 get_client_socket(void)
  77 {
  78     int csfd;
  79
  80     csfd = socket(AF_UNIX, SOCK_DGRAM, 0);
  81
  82     if(csfd < 0)
  83         perror("error opening UNIX domain socket");
  84
  85     return csfd;
  86 }
  87 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80