220 lines
5.0 KiB
C
220 lines
5.0 KiB
C
/*
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* uicb.c - user interface callbacks management
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*
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* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
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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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/**
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* @defgroup ui_callback User Interface Callbacks
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*/
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/* strndup() */
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#define _GNU_SOURCE
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#include <sys/wait.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "awesome.h"
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#include "tag.h"
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#include "mouse.h"
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#include "statusbar.h"
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#include "widget.h"
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#include "focus.h"
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#include "client.h"
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#include "screen.h"
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#include "titlebar.h"
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#include "layouts/tile.h"
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extern AwesomeConf globalconf;
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#include "uicbgen.h"
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/** Restart awesome with the current command line.
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* \param screen ID
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* \param arg arg (unused)
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* \ingroup ui_callback
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*/
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void
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uicb_restart(int screen, char *arg __attribute__ ((unused)))
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{
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uicb_exec(screen, globalconf.argv);
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}
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/** Execute another process, replacing the current instance of awesome.
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* \param screen Screen ID
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* \param cmd Command
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* \ingroup ui_callback
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*/
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void
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uicb_exec(int screen __attribute__ ((unused)), char *cmd)
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{
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Client *c;
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char *args, *path;
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/* remap all clients since some WM won't handle them otherwise */
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for(c = globalconf.clients; c; c = c->next)
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client_unban(c);
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XSync(globalconf.display, False);
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XCloseDisplay(globalconf.display);
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/* Ignore the leading spaces if any */
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while(cmd[0] && cmd[0] == ' ')
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cmd++;
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/* Get the beginning of the arguments */
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args = strchr(cmd, ' ');
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if(args)
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path = strndup(cmd, args - cmd);
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else
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path = strndup(cmd, a_strlen(cmd));
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execlp(path, cmd, NULL);
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p_delete(&path);
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}
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/** Spawn another process.
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* \param screen Screen ID
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* \param arg Command
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* \ingroup ui_callback
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*/
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void
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uicb_spawn(int screen, char *arg)
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{
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static char *shell = NULL;
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char *display = NULL;
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char *tmp, newdisplay[128];
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if(!arg)
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return;
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if(!shell && !(shell = getenv("SHELL")))
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shell = a_strdup("/bin/sh");
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if(!globalconf.screens_info->xinerama_is_active && (tmp = getenv("DISPLAY")))
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{
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display = a_strdup(tmp);
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if((tmp = strrchr(display, '.')))
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*tmp = '\0';
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snprintf(newdisplay, sizeof(newdisplay), "%s.%d", display, screen);
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setenv("DISPLAY", newdisplay, 1);
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}
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/* The double-fork construct avoids zombie processes and keeps the code
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* clean from stupid signal handlers. */
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if(fork() == 0)
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{
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if(fork() == 0)
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{
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if(globalconf.display)
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close(ConnectionNumber(globalconf.display));
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setsid();
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execl(shell, shell, "-c", arg, NULL);
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warn("execl '%s -c %s' failed: %s\n", shell, arg, strerror(errno));
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}
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exit(EXIT_SUCCESS);
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}
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wait(0);
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}
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/** Run the uicb
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* \param cmd the uicb command to parse
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* \return 0 on succes, -1 on failure
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*/
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static int
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__uicb_run(char *cmd)
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{
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char *p, *argcpy;
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const char *arg;
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int screen;
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ssize_t len;
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Uicb *uicb;
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len = a_strlen(cmd);
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p = strtok(cmd, " ");
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if (!p)
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{
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warn("ignoring malformed command\n");
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return -1;
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}
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screen = atoi(cmd);
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if(screen >= globalconf.screens_info->nscreen || screen < 0)
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{
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warn("invalid screen specified: %i\n", screen);
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return -1;
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}
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p = strtok(NULL, " ");
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if (!p)
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{
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warn("ignoring malformed command.\n");
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return -1;
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}
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uicb = name_func_lookup(p, UicbList);
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if (!uicb)
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{
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warn("unknown uicb function: %s.\n", p);
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return -1;
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}
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if (p + a_strlen(p) < cmd + len)
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{
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arg = p + a_strlen(p) + 1;
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len = a_strlen(arg);
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/* Allow our callees to modify this string. */
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argcpy = p_new(char, len + 1);
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a_strncpy(argcpy, len + 1, arg, len);
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uicb(screen, argcpy);
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p_delete(&argcpy);
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}
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else
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uicb(screen, NULL);
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return 0;
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}
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/** Parse the control buffer.
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* \param cmd the control buffer
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* \return 0 on succes, -1 on failure
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*/
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int
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parse_control(char *cmd)
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{
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char *p, *curcmd = cmd;
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if(!a_strlen(cmd))
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return -1;
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while((p = strchr(curcmd, '\n')))
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{
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*p = '\0';
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__uicb_run(curcmd);
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curcmd = p + 1;
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}
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return 0;
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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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