diff options
Diffstat (limited to 'polyp/module-x11-publish.c')
-rw-r--r-- | polyp/module-x11-publish.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/polyp/module-x11-publish.c b/polyp/module-x11-publish.c new file mode 100644 index 00000000..fd4df4ad --- /dev/null +++ b/polyp/module-x11-publish.c @@ -0,0 +1,167 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + polypaudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with polypaudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <X11/Xlib.h> +#include <X11/Xatom.h> + +#include "module.h" +#include "sink.h" +#include "scache.h" +#include "modargs.h" +#include "xmalloc.h" +#include "namereg.h" +#include "log.h" +#include "x11wrap.h" +#include "util.h" + +#include "module-x11-publish-symdef.h" + +PA_MODULE_AUTHOR("Lennart Poettering") +PA_MODULE_DESCRIPTION("X11 Credential Publisher") +PA_MODULE_VERSION(PACKAGE_VERSION) +PA_MODULE_USAGE("display=<X11 display>") + +static const char* const valid_modargs[] = { + "display", + "sink", + "source", + NULL +}; + +struct userdata { + struct pa_core *core; + struct pa_x11_wrapper *x11_wrapper; + Display *display; + char *id; +}; + +static void set_x11_prop(Display *d, const char *name, const char *data) { + Atom a = XInternAtom(d, name, False); + XChangeProperty(d, RootWindow(d, 0), a, XA_STRING, 8, PropModeReplace, (unsigned char*) data, strlen(data)+1); +} + +static void del_x11_prop(Display *d, const char *name) { + Atom a = XInternAtom(d, name, False); + XDeleteProperty(d, RootWindow(d, 0), a); +} + +static char* get_x11_prop(Display *d, const char *name, char *p, size_t l) { + Atom actual_type; + int actual_format; + unsigned long nitems; + unsigned long nbytes_after; + unsigned char *prop; + + Atom a = XInternAtom(d, name, False); + if (XGetWindowProperty(d, RootWindow(d, 0), a, 0, (l+2)/4, False, XA_STRING, &actual_type, &actual_format, &nitems, &nbytes_after, &prop) != Success) + return NULL; + + memcpy(p, prop, nitems); + p[nitems] = 0; + + XFree(prop); + return p; +} + +int pa__init(struct pa_core *c, struct pa_module*m) { + struct userdata *u; + struct pa_modargs *ma = NULL; + char hn[256], un[128]; + const char *t; + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log(__FILE__": failed to parse module arguments\n"); + goto fail; + } + + m->userdata = u = pa_xmalloc(sizeof(struct userdata)); + u->core = c; + u->id = NULL; + + if (!(u->x11_wrapper = pa_x11_wrapper_get(c, pa_modargs_get_value(ma, "display", NULL)))) + goto fail; + + u->display = pa_x11_wrapper_get_display(u->x11_wrapper); + + pa_get_host_name(hn, sizeof(hn)); + pa_get_user_name(un, sizeof(un)); + + u->id = pa_sprintf_malloc("%s@%s/%u", un, hn, (unsigned) getpid()); + + set_x11_prop(u->display, "POLYP_SERVER", hn); + set_x11_prop(u->display, "POLYP_ID", u->id); + + if ((t = pa_modargs_get_value(ma, "source", NULL))) + set_x11_prop(u->display, "POLYP_SOURCE", t); + + if ((t = pa_modargs_get_value(ma, "sink", NULL))) + set_x11_prop(u->display, "POLYP_SINK", t); + + pa_modargs_free(ma); + return 0; + +fail: + if (ma) + pa_modargs_free(ma); + + pa__done(c, m); + return -1; +} + +void pa__done(struct pa_core *c, struct pa_module*m) { + struct userdata*u; + assert(c && m); + + if (!(u = m->userdata)) + return; + + if (u->x11_wrapper) { + char t[256]; + + /* Yes, here is a race condition */ + if (!get_x11_prop(u->display, "POLYP_ID", t, sizeof(t)) || strcmp(t, u->id)) + pa_log("WARNING: Polypaudio information vanished from X11!\n"); + else { + del_x11_prop(u->display, "POLYP_ID"); + del_x11_prop(u->display, "POLYP_SERVER"); + del_x11_prop(u->display, "POLYP_SINK"); + del_x11_prop(u->display, "POLYP_SOURCE"); + XSync(u->display, False); + } + } + + if (u->x11_wrapper) + pa_x11_wrapper_unref(u->x11_wrapper); + + pa_xfree(u->id); + pa_xfree(u); +} + |