134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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* socket.c - awesome client, communicate with socket, common functions
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*
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* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
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* Copyright © 2007 daniel@brinkers.de
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "common/socket.h"
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#include "common/util.h"
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#define CONTROL_UNIX_SOCKET_PATH ".awesome_ctl."
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/** Get a sockaddr_un struct with information feeded for opening a
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* communication to the awesome socket for given display
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* \param display the display number
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* \return sockaddr_un struct ready to be used or NULL if a problem occured
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*/
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struct sockaddr_un *
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socket_getaddr(const char *display)
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{
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char *homedir, *tmp, *dot;
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char *hostname = NULL, *screen = NULL;
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ssize_t path_len, hostname_len, screen_len;
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struct sockaddr_un *addr;
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addr = p_new(struct sockaddr_un, 1);
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homedir = getenv("HOME");
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if(a_strlen(display))
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{
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/* find hostname */
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if((tmp = strchr(display, ':')))
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{
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/* if display starts with : */
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if(tmp == display)
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{
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hostname = a_strdup("localhost");
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hostname_len = 9;
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}
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else
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{
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hostname_len = tmp - display;
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hostname = a_strndup(display, hostname_len);
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}
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tmp++;
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if((dot = strchr(tmp, '.')))
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{
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screen_len = dot - tmp;
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screen = a_strndup(tmp, screen_len);
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}
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else
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{
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screen = a_strdup(tmp);
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screen_len = a_strlen(screen);
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}
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}
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else
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{
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hostname = a_strdup("unknown");
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hostname_len = 7;
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screen = a_strdup("0");
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screen_len = 1;
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}
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}
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else
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{
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hostname = a_strdup("localhost");
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hostname_len = 9;
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screen = a_strdup("0");
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screen_len = 1;
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}
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/* + 2 for / and . and \0 */
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path_len = a_strlen(homedir) + sizeof(CONTROL_UNIX_SOCKET_PATH) - 1
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+ screen_len + hostname_len + 3;
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if(path_len >= ssizeof(addr->sun_path))
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{
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fprintf(stderr, "error: path of control UNIX domain socket is too long");
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return NULL;
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}
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a_strcpy(addr->sun_path, path_len, homedir);
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a_strcat(addr->sun_path, path_len, "/");
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a_strcat(addr->sun_path, path_len, CONTROL_UNIX_SOCKET_PATH);
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a_strcat(addr->sun_path, path_len, hostname);
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a_strcat(addr->sun_path, path_len, "|");
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a_strcat(addr->sun_path, path_len, screen);
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p_delete(&hostname);
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p_delete(&screen);
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addr->sun_family = AF_UNIX;
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return addr;
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}
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/** Get a AF_UNIX socket for communicating with awesome
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* \return the socket file descriptor
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*/
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int
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socket_getclient(void)
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{
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int csfd;
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csfd = socket(AF_UNIX, SOCK_DGRAM, 0);
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if(csfd < 0)
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warn("error opening UNIX domain socket: %s", strerror(errno));
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return csfd;
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}
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// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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