ede/evoke/EvokeService.cpp

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/*
* $Id$
*
* Evoke, head honcho of everything
* Part of Equinox Desktop Environment (EDE).
* Copyright (c) 2000-2007 EDE Authors.
*
* This program is licensed under terms of the
* GNU General Public License version 2 or newer.
* See COPYING for details.
*/
#include "Log.h"
#include "Logout.h"
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#include "EvokeService.h"
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#include "Splash.h"
#include "Spawn.h"
#include "Crash.h"
#include "Autostart.h"
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#include <edelib/File.h>
//#include <edelib/Regex.h>
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#include <edelib/Config.h>
#include <edelib/DesktopFile.h>
#include <edelib/Directory.h>
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#include <edelib/StrUtil.h>
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#include <edelib/Util.h>
#include <edelib/Debug.h>
#include <edelib/MessageBox.h>
#include <edelib/Nls.h>
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#include <FL/fl_ask.h>
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#include <sys/types.h> // getpid
#include <unistd.h> // pipe
#include <fcntl.h> // fcntl
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#include <stdlib.h> // free
#include <string.h> // strdup, memset
#include <errno.h> // error codes
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#include <signal.h>
void resolve_path(const edelib::String& datadir, edelib::String& item, bool have_datadir) {
if(item.empty())
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return;
const char* i = item.c_str();
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if(!edelib::file_exists(i) && have_datadir) {
item = edelib::build_filename("/", datadir.c_str(), i);
i = item.c_str();
if(!edelib::file_exists(i)) {
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// no file, send then empty
item.clear();
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}
}
}
char* get_basename(const char* path) {
char* p = strrchr(path, '/');
if(p)
return (p + 1);
return (char*)path;
}
/*
* 'Remove' duplicate entries by looking at their basename
* (aka. filename, but ignoring directory path). Item is not actually removed from
* the list (will mess up list pointers, but this can be resolved), but data it points
* to is cleared, which is a sort of marker to caller to skip it. Dumb yes, but very simple.
*
* It will use brute force for lookup and 'removal' and (hopfully) it should not have
* a large impact on startup since, afaik, no one keeps hundreds of files in autostart
* directories (if keeps them, then that issue is not up to this program :-P).
*
* Alternative would be to sort items (by their basename) and apply consecutive unique on
* them, but... is it worth ?
*/
void basename_unique(StringList& lst) {
if(lst.empty())
return;
StringListIter first, last, first1, last1;
first = lst.begin();
last = lst.end();
if(first == last)
return;
const char* p1, *p2;
for(; first != last; ++first) {
for(first1 = lst.begin(), last1 = lst.end(); first1 != last1; ++first1) {
p1 = (*first).c_str();
p2 = (*first1).c_str();
if(first != first1 && strcmp(get_basename(p1), get_basename(p2)) == 0)
(*first1).clear();
}
}
}
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int get_int_property_value(Atom at) {
Atom real;
int format;
unsigned long n, extra;
unsigned char* prop;
int status = XGetWindowProperty(fl_display, RootWindow(fl_display, fl_screen),
at, 0L, 0x7fffffff, False, XA_CARDINAL, &real, &format, &n, &extra,
(unsigned char**)&prop);
int ret = -1;
if(status != Success && !prop)
return ret;
ret = int(*(long*)prop);
XFree(prop);
return ret;
}
int get_string_property_value(Atom at, char* txt, int txt_len) {
XTextProperty names;
XGetTextProperty(fl_display, RootWindow(fl_display, fl_screen), &names, at);
if(!names.nitems || !names.value)
return 0;
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char** vnames;
int nsz = 0;
if(!XTextPropertyToStringList(&names, &vnames, &nsz)) {
XFree(names.value);
return 0;
}
strncpy(txt, vnames[0], txt_len);
txt[txt_len] = 0;
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XFreeStringList(vnames);
return 1;
}
/*
* This is re-implementation of XmuClientWindow() so I don't have to link code with libXmu.
* XmuClientWindow() will return parent window of given window; this is used so we don't
* send delete message to some button or else, but it's parent.
*/
Window mu_try_children(Display* dpy, Window win, Atom wm_state) {
Atom real;
Window root, parent;
Window* children = 0;
Window ret = 0;
unsigned int nchildren;
unsigned char* prop;
unsigned long n, extra;
int format;
if(!XQueryTree(dpy, win, &root, &parent, &children, &nchildren))
return 0;
for(unsigned int i = 0; (i < nchildren) && !ret; i++) {
prop = NULL;
XGetWindowProperty(dpy, children[i], wm_state, 0, 0, False, AnyPropertyType,
&real, &format, &n, &extra, (unsigned char**)&prop);
if(prop)
XFree(prop);
if(real)
ret = children[i];
}
for(unsigned int i = 0; (i < nchildren) && !ret; i++)
ret = mu_try_children(dpy, win, wm_state);
if(children)
XFree(children);
return ret;
}
Window mu_client_window(Display* dpy, Window win, Atom wm_state) {
Atom real;
int format;
unsigned long n, extra;
unsigned char* prop;
int status = XGetWindowProperty(dpy, win, wm_state, 0, 0, False, AnyPropertyType,
&real, &format, &n, &extra, (unsigned char**)&prop);
if(prop)
XFree(prop);
if(status != Success)
return win;
if(real)
return win;
Window w = mu_try_children(dpy, win, wm_state);
if(!w) w = win;
return w;
}
void service_watcher_cb(int pid, int signum) {
EvokeService::instance()->service_watcher(pid, signum);
}
void wake_up_cb(int fd, void* v) {
EvokeService::instance()->wake_up(fd);
}
EvokeService::EvokeService() :
is_running(0), logfile(NULL), xsm(NULL), pidfile(NULL), lockfile(NULL) {
wake_up_pipe[0] = wake_up_pipe[1] = -1;
quit_child_pid = quit_child_ret = -1;
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}
EvokeService::~EvokeService() {
if(logfile)
delete logfile;
stop_xsettings_manager();
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if(lockfile) {
edelib::file_remove(lockfile);
free(lockfile);
}
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if(pidfile) {
edelib::file_remove(pidfile);
free(pidfile);
}
processes.clear();
if(wake_up_pipe[0] != -1)
close(wake_up_pipe[0]);
if(wake_up_pipe[1] != -1)
close(wake_up_pipe[1]);
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}
EvokeService* EvokeService::instance(void) {
static EvokeService es;
return &es;
}
bool EvokeService::setup_channels(void) {
if(pipe(wake_up_pipe) != 0)
return false;
fcntl(wake_up_pipe[1], F_SETFL, fcntl(wake_up_pipe[1], F_GETFL) | O_NONBLOCK);
Fl::add_fd(wake_up_pipe[0], FL_READ, wake_up_cb);
return true;
}
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bool EvokeService::setup_logging(const char* file) {
if(!file)
logfile = new DummyLog();
else
logfile = new RealLog();
if(!logfile->open(file)) {
delete logfile;
return false;
}
return true;
}
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bool EvokeService::setup_pid(const char* file, const char* lock) {
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if(!file)
return false;
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if(edelib::file_exists(lock))
return false;
FILE* l = fopen(lock, "w");
if(!l)
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return false;
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fprintf(l, " ");
fclose(l);
lockfile = strdup(lock);
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FILE* f = fopen(file, "w");
if(!f)
return false;
fprintf(f, "%i", getpid());
fclose(f);
pidfile = strdup(file);
return true;
}
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bool EvokeService::init_splash(const char* config, bool no_splash, bool dry_run) {
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edelib::Config c;
if(!c.load(config))
return false;
char buff[1024];
bool have_datadir = false;
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c.get("evoke", "DataDirectory", buff, sizeof(buff));
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// no evoke section
if(c.error() == edelib::CONF_ERR_SECTION)
return false;
edelib::String datadir;
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if(c.error() == edelib::CONF_SUCCESS) {
datadir = buff;
have_datadir = true;
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}
edelib::String splashimg;
if(c.get("evoke", "Splash", buff, sizeof(buff)))
splashimg = buff;
edelib::String sound;
if(c.get("evoke", "Sound", buff, sizeof(buff)))
sound = buff;
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// Startup key must exists
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if(!c.get("evoke", "Startup", buff, sizeof(buff)))
return false;
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StringList vs;
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edelib::stringtok(vs, buff, ",");
// nothing, fine, do nothing
unsigned int sz = vs.size();
if(sz == 0)
return true;
EvokeClient ec;
const char* key_name;
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for(StringListIter it = vs.begin(); it != vs.end(); ++it) {
key_name = (*it).c_str();
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edelib::str_trim((char*)key_name);
// probably listed but not the same key; also Exec value must exists
if(!c.get(key_name, "Exec", buff, sizeof(buff)))
continue;
else
ec.exec = buff;
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if(c.get(key_name, "Description", buff, sizeof(buff)))
ec.desc = buff;
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if(c.get(key_name, "Icon", buff, sizeof(buff)))
ec.icon = buff;
clients.push_back(ec);
}
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/*
* Now, before data is send to Splash, resolve directories
* since Splash expects that.
*/
resolve_path(datadir, splashimg, have_datadir);
resolve_path(datadir, sound, have_datadir);
ClientListIter it, it_end;
for(it = clients.begin(), it_end = clients.end(); it != it_end; ++it)
resolve_path(datadir, (*it).icon, have_datadir);
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Splash sp(no_splash, dry_run);
sp.set_clients(&clients);
sp.set_background(&splashimg);
sp.set_sound(&sound);
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sp.run();
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return true;
}
/*
* This is implementation of Autostart Spec (http://standards.freedesktop.org/autostart-spec/autostart-spec-0.5.html).
* The Autostart Directories are $XDG_CONFIG_DIRS/autostart.
* If the same filename is located under multiple Autostart Directories
* only the file under the most important directory should be used.
* Example: If $XDG_CONFIG_HOME is not set the Autostart Directory in the user's home
* directory is ~/.config/autostart/
* Example: If $XDG_CONFIG_DIRS is not set the system wide Autostart Directory
* is /etc/xdg/autostart/
* Example: If $XDG_CONFIG_HOME and $XDG_CONFIG_DIRS are not set and the two
* files /etc/xdg/autostart/foo.desktop and ~/.config/autostart/foo.desktop exist
* then only the file ~/.config/autostart/foo.desktop will be used because ~/.config/autostart/
* is more important than /etc/xdg/autostart/
* If Hidden key is set true in .desktop file, file MUST be ignored.
* OnlyShowIn and NotShowIn (list of strings identifying desktop environments) if (or if not)
* contains environment name, MUST not be started/not started.
* TryExec is same as for .desktop spec.
*/
void EvokeService::init_autostart(bool safe) {
const char* autostart_dirname = "/autostart/";
edelib::String adir = edelib::user_config_dir();
adir += autostart_dirname;
StringList dfiles, sysdirs;
StringListIter it, it_end;
edelib::dir_list(adir.c_str(), dfiles, true);
edelib::system_config_dirs(sysdirs);
if(!sysdirs.empty()) {
for(it = sysdirs.begin(), it_end = sysdirs.end(); it != it_end; ++it) {
*it += autostart_dirname;
// append content
edelib::dir_list((*it).c_str(), dfiles, true, false, false);
}
}
if(dfiles.empty())
return;
/*
* Remove duplicates where first one seen have priority to be keept.
* This way is required by spec.
*
* Also handle this case (noted in spec):
* if $XDG_CONFIG_HOME/autostart/foo.desktop and $XDG_CONFIG_DIRS/autostart/foo.desktop
* exists, but $XDG_CONFIG_HOME/autostart/foo.desktop have 'Hidden = true',
* $XDG_CONFIG_DIRS/autostart/foo.autostart is ignored too.
*
* Latter is implied via basename_unique().
*/
basename_unique(dfiles);
const char* name;
char buff[1024];
edelib::DesktopFile df;
edelib::String item_name;
AstartDialog dlg(dfiles.size(), safe);
for(it = dfiles.begin(), it_end = dfiles.end(); it != it_end; ++it) {
if((*it).empty())
continue;
name = (*it).c_str();
if(!edelib::str_ends(name, ".desktop"))
continue;
if(!df.load(name)) {
EVOKE_LOG("Can't load %s. Skipping...\n", name);
continue;
}
// If Hidden key is set true in .desktop file, file MUST be ignored.
if(df.hidden())
continue;
if(df.name(buff, sizeof(buff)))
item_name = buff;
else
item_name = name;
if(df.try_exec(buff, sizeof(buff)) || df.exec(buff, sizeof(buff)))
dlg.add_item(item_name, buff);
}
if(dlg.list_size() > 0)
dlg.run();
}
void EvokeService::init_xsettings_manager(void) {
xsm = new Xsm;
if(Xsm::manager_running(fl_display, fl_screen)) {
int ret = edelib::ask(_("XSETTINGS manager already running on this screen. Would you like to replace it?"));
if(ret < 1) {
stop_xsettings_manager();
return;
} else
goto do_it;
}
do_it:
if(!xsm->init(fl_display, fl_screen)) {
edelib::alert(_("Unable to load XSETTINGS manager properly"));
stop_xsettings_manager();
}
if(!xsm) return;
if(xsm->load_serialized("ede-settings.xml"))
xsm->notify();
}
void EvokeService::stop_xsettings_manager(void) {
if(!xsm)
return;
xsm->save_serialized("ede-settings.xml");
delete xsm;
xsm = NULL;
}
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void EvokeService::setup_atoms(Display* d) {
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// with them must be send '1' or property will be ignored (except _EDE_EVOKE_SPAWN)
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_ede_shutdown_all = XInternAtom(d, "_EDE_EVOKE_SHUTDOWN_ALL", False);
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_ede_evoke_quit = XInternAtom(d, "_EDE_EVOKE_QUIT", False);
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_ede_spawn = XInternAtom(d, "_EDE_EVOKE_SPAWN", False);
}
void EvokeService::quit_x11(void) {
Window dummy, *wins;
Window root = RootWindow(fl_display, fl_screen);
unsigned int n;
if(!XQueryTree(fl_display, root, &dummy, &dummy, &wins, &n))
return;
Atom _wm_protocols = XInternAtom(fl_display, "WM_PROTOCOLS", False);
Atom _wm_delete_window = XInternAtom(fl_display, "WM_DELETE_WINDOW", False);
Atom _wm_state = XInternAtom(fl_display, "WM_STATE", False);
XWindowAttributes attr;
XEvent ev;
for(unsigned int i = 0; i < n; i++) {
if(XGetWindowAttributes(fl_display, wins[i], &attr) && (attr.map_state == IsViewable))
wins[i] = mu_client_window(fl_display, wins[i], _wm_state);
else
wins[i] = 0;
}
/*
* Hm... probably we should first quit known processes started by us
* then rest of the X familly
*/
for(unsigned int i = 0; i < n; i++) {
if(wins[i]) {
EVOKE_LOG("closing %i window\n", i);
// FIXME: check WM_PROTOCOLS before sending WM_DELETE_WINDOW ???
memset(&ev, 0, sizeof(ev));
ev.xclient.type = ClientMessage;
ev.xclient.window = wins[i];
ev.xclient.message_type = _wm_protocols;
ev.xclient.format = 32;
ev.xclient.data.l[0] = (long)_wm_delete_window;
ev.xclient.data.l[1] = CurrentTime;
XSendEvent(fl_display, wins[i], False, 0L, &ev);
EVOKE_LOG("%i window closed\n", i);
}
}
XSync(fl_display, False);
sleep(1);
// kill remaining windows
for(unsigned int i = 0; i < n; i++) {
if(wins[i]) {
EVOKE_LOG("killing remaining %i window\n", i);
XKillClient(fl_display, wins[i]);
}
}
XSync(fl_display, False);
XFree(wins);
EVOKE_LOG("now close myself\n");
stop();
}
/*
* This is run each time when some of the managed childs quits.
* Instead directly running wake_up(), it will be notified wia
* wake_up_pipe[] channel, via add_fd() monitor.
*
* This workaround is due races.
*/
void EvokeService::service_watcher(int pid, int ret) {
puts("=== service_watcher() ===");
printf("got %i\n", ret);
Mutex mutex;
mutex.lock();
quit_child_ret = ret;
quit_child_pid = pid;
mutex.unlock();
if(write(wake_up_pipe[1], "c", 1) != 1)
puts("error write");
}
void EvokeService::wake_up(int fd) {
puts("=== wake_up() ===");
char c;
if(read(wake_up_pipe[0], &c, 1) != 1 || c != 'c') {
puts("unable to read from channel");
return;
}
Mutex mutex;
mutex.lock();
int child_ret = quit_child_ret;
int child_pid = quit_child_pid;
mutex.unlock();
//EASSERT(child_ret != -1 && child_pid != -1);
mutex.lock();
quit_child_ret = quit_child_pid = -1;
mutex.unlock();
if(child_ret == SPAWN_CHILD_CRASHED) {
EvokeProcess pc;
bool ret;
mutex.lock();
ret = find_and_unregister_process(child_pid, pc);
mutex.unlock();
if(ret) {
printf("%s crashed with core dump\n", pc.cmd.c_str());
CrashDialog cdialog;
cdialog.set_data(pc.cmd.c_str());
cdialog.run();
}
} else {
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mutex.lock();
unregister_process(child_pid);
mutex.unlock();
switch(child_ret) {
case SPAWN_CHILD_KILLED:
printf("child %i killed\n", child_pid);
break;
case 127:
edelib::alert(_("Program not found"));
break;
case 126:
edelib::alert(_("Program not executable"));
break;
default:
printf("child %i exited with %i\n", child_pid, child_ret);
break;
}
}
}
/*
* Execute program. It's return status
* will be reported via service_watcher()
*/
void EvokeService::run_program(const char* cmd, bool enable_vars) {
EASSERT(cmd != NULL);
edelib::String scmd(cmd);
pid_t child;
if(enable_vars && scmd.length() > 6) {
if(scmd.substr(0, 6) == "$TERM ") {
char* term = getenv("TERM");
if(!term)
term = "xterm";
edelib::String tmp(term);
tmp += " -e ";
tmp += scmd.substr(6, scmd.length());
scmd = tmp;
}
}
int r = spawn_program_with_core(scmd.c_str(), service_watcher_cb, &child);
if(r != 0)
edelib::alert("Unable to start %s. Got code %i", cmd, r);
else {
Mutex mutex;
mutex.lock();
register_process(scmd.c_str(), child);
mutex.unlock();
}
}
#if 0
void EvokeService::heuristic_run_program(const char* cmd) {
if(strncmp(cmd, "$TERM ", 6) == 0) {
run_program(cmd);
return;
}
edelib::String ldd = edelib::file_path("ldd");
if(ldd.empty()) {
run_program(cmd);
return;
}
ldd += " ";
ldd += edelib::file_path(cmd);
int r = spawn_program(ldd.c_str(), 0, 0, "/tmp/eshrun");
printf("%s\n", ldd.c_str());
if(r != 0) {
printf("spawn %i\n", r);
return;
}
sleep(1);
//edelib::File f;
FILE* f = fopen("/tmp/eshrun", "r");
if(!f) {
puts("File::open");
return;
} else {
puts("opened /tmp/eshrun");
}
edelib::Regex rx;
rx.compile("^\\s*libX11");
char buff[1024];
bool is_gui = 0;
while(fgets(buff, sizeof(buff)-1, f)) {
printf("checking %s\n", buff);
if(rx.match(buff)) {
printf("found libX11\n");
is_gui = 1;
//break;
}
}
fclose(f);
edelib::String fcmd;
if(!is_gui) {
fcmd = "$TERM ";
fcmd += cmd;
} else {
fcmd = cmd;
}
run_program(fcmd.c_str());
}
#endif
void EvokeService::register_process(const char* cmd, pid_t pid) {
EvokeProcess pc;
pc.cmd = cmd;
pc.pid = pid;
printf("registering %s with %i\n", cmd, pid);
processes.push_back(pc);
}
void EvokeService::unregister_process(pid_t pid) {
if(processes.empty())
return;
ProcessListIter it = processes.begin();
ProcessListIter it_end = processes.end();
while(it != it_end) {
if((*it).pid == pid) {
printf("Found %s with pid %i, cleaning...\n", (*it).cmd.c_str(), pid);
processes.erase(it);
return;
}
++it;
}
}
bool EvokeService::find_and_unregister_process(pid_t pid, EvokeProcess& pc) {
if(processes.empty())
return 0;
ProcessListIter it = processes.begin();
ProcessListIter it_end = processes.end();
while(it != it_end) {
if((*it).pid == pid) {
printf("Found %s with pid %i, cleaning...\n", (*it).cmd.c_str(), pid);
pc.cmd = (*it).cmd;
pc.pid = pid;
processes.erase(it);
return 1;
}
++it;
}
return 0;
}
/*
* Main loop for processing got X events.
*
* Great care must be taken to route this events to fltk too (via fl_handle()), since
* add_fd() (in evoke.cpp) will not do that. If events are not routed to fltk, popped
* dialogs, especially from service_watcher() will not be correctly drawn and will hand
* whole program.
*
* FIXME: any better way ?
*/
int EvokeService::handle(const XEvent* xev) {
EVOKE_LOG("Got event %i\n", xev->type);
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if(xsm && xsm->should_terminate(xev)) {
EVOKE_LOG("XSETTINGS manager shutdown\n");
stop_xsettings_manager();
// return 1;
}
#if 0
else if(xev->type == MapNotify) {
puts("=================");
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if(top_win) {
// for splash to keep it at top (working in old edewm)
XRaiseWindow(fl_display, fl_xid(top_win));
// return 1;
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}
} else if(xev->type == ConfigureNotify) {
if(xev->xconfigure.event == DefaultRootWindow(fl_display) && top_win) {
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// splash too, but keep window under other wm's
XRaiseWindow(fl_display, fl_xid(top_win));
// return 1;
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}
}
#endif
else if(xev->type == PropertyNotify) {
if(xev->xproperty.atom == _ede_spawn) {
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char buff[1024];
if(get_string_property_value(_ede_spawn, buff, sizeof(buff))) {
EVOKE_LOG("Got _EDE_EVOKE_SPAWN with %s. Starting client...\n", buff);
run_program(buff);
} else {
EVOKE_LOG("Got _EDE_EVOKE_SPAWN with malformed data. Ignoring...\n");
}
// return 1;
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}
if(xev->xproperty.atom == _ede_evoke_quit) {
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int val = get_int_property_value(_ede_evoke_quit);
if(val == 1) {
EVOKE_LOG("Got accepted _EDE_EVOKE_QUIT\n");
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stop();
} else
EVOKE_LOG("Got _EDE_EVOKE_QUIT with bad code (%i). Ignoring...\n", val);
// return 1;
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}
if(xev->xproperty.atom == _ede_shutdown_all) {
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int val = get_int_property_value(_ede_shutdown_all);
if(val == 1) {
EVOKE_LOG("Got accepted _EDE_EVOKE_SHUTDOWN_ALL\n");
int dw = DisplayWidth(fl_display, fl_screen);
int dh = DisplayHeight(fl_display, fl_screen);
// TODO: add XDM service permissions
printf("got %i\n", logout_dialog(dw, dh, 1, 1));
//quit_x11();
} else
EVOKE_LOG("Got _EDE_EVOKE_SHUTDOWN_ALL with bad code (%i). Ignoring...\n", val);
// return 1;
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}
}
//return 0;
return fl_handle(*xev);
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}