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ede/ede-launch/ede-launch.cpp

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/*
* $Id$
*
* ede-launch, launch external application
* Part of Equinox Desktop Environment (EDE).
* Copyright (c) 2008-2009 EDE Authors.
*
* This program is licensed under terms of the
* GNU General Public License version 2 or newer.
* See COPYING for details.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/resource.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <ctype.h>
#include <FL/x.H>
#include <FL/Fl.H>
#include <FL/Fl_Box.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Check_Button.H>
#include <FL/Fl_Input.H>
#include <FL/Fl_Pixmap.H>
#include <edelib/Run.h>
#include <edelib/Resource.h>
#include <edelib/Window.h>
#include <edelib/Debug.h>
#include <edelib/Missing.h>
#include <edelib/MessageBox.h>
#include <edelib/String.h>
#include <edelib/Ede.h>
#include "icons/run.xpm"
/*
* Window from X11 is alread included with Fl.H so we can't use EDELIB_NS_USING(Window) here.
* Stupid C++ namespaces
*/
#define LaunchWindow edelib::Window
EDELIB_NS_USING(Resource)
EDELIB_NS_USING(String)
EDELIB_NS_USING(RES_USER_ONLY)
EDELIB_NS_USING(run_sync)
EDELIB_NS_USING(run_async)
EDELIB_NS_USING(alert)
static Fl_Pixmap image_run((const char**)run_xpm);
static Fl_Input* dialog_input;
static Fl_Check_Button* in_term;
static void help(void) {
puts("Usage: ede-launch program");
puts("EDE program launcher");
}
static char* get_basename(const char* path) {
char *p = (char*)strrchr(path, '/');
if(p)
return (p + 1);
return (char*)p;
}
static char** cmd_split(const char* cmd) {
int sz = 10;
int i = 0;
char* c = strdup(cmd);
char** arr = (char**)malloc(sizeof(char*) * sz);
for(char* p = strtok(c, " "); p; p = strtok(NULL, " ")) {
if(i >= sz) {
sz *= 2;
arr = (char**)realloc(arr, sizeof(char*) * sz);
}
arr[i++] = strdup(p);
}
arr[i] = NULL;
free(c);
return arr;
}
static void start_crasher(const char* cmd, int sig) {
const char* base = get_basename(cmd);
const char* ede_app_flag = "";
/* this means the app was called without full path */
if(!base)
base = cmd;
/*
* determine is our app by checking the prefix; we don't want user to send bug reports about crashes
* of foreign applications
*/
if(strncmp(base, "ede-", 4) == 0)
ede_app_flag = "--edeapp";
/* call edelib implementation instead start_child_process() to prevents loops if 'ede-crasher' crashes */
run_sync("ede-crasher %s --appname %s --apppath %s --signal %i", ede_app_flag, base, cmd, sig);
}
static int start_child_process(const char* cmd) {
int pid, in[2], out[2], err[2];
char** params = cmd_split(cmd);
pipe(in);
pipe(out);
pipe(err);
signal(SIGCHLD, SIG_DFL);
pid = fork();
switch(pid) {
case 0:
/* child process */
close(0);
dup(in[0]);
close(in[0]);
close(in[1]);
close(1);
dup(out[1]);
close(out[0]);
close(out[1]);
close(2);
dup(err[1]);
close(err[0]);
close(err[1]);
errno = 0;
/* start it */
execvp(params[0], params);
/* some programs use value 2 (tar) */
if(errno == 2)
_exit(199);
else
_exit(errno);
break;
case -1:
E_WARNING(E_STRLOC ": fork() failed\n");
/* close the pipes */
close(in[0]);
close(in[1]);
close(out[0]);
close(out[1]);
close(err[0]);
close(err[1]);
break;
default:
/* parent */
close(in[0]);
close(out[1]);
close(err[1]);
break;
}
/* cleanup when returns from the child */
for(int i = 0; params[i]; i++)
free(params[i]);
free(params);
int status = 0, ret = 1;
errno = 0;
if(waitpid(pid, &status, 0) < 0) {
E_WARNING(E_STRLOC ": waitpid() failed with '%s'\n", strerror(errno));
return 1;
}
if(WIFEXITED(status)) {
ret = WEXITSTATUS(status);
} else if(WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV) {
start_crasher(cmd, SIGSEGV);
} else {
E_WARNING(E_STRLOC ": child '%s' killed\n", cmd);
}
return ret;
}
static int start_child_process_with_core(const char* cmd) {
struct rlimit r;
errno = 0;
if(getrlimit(RLIMIT_CORE, &r) == -1) {
E_WARNING(E_STRLOC ": gerlimit() failed with '%s'\n", strerror(errno));
return -1;
}
rlim_t old = r.rlim_cur;
r.rlim_cur = RLIM_INFINITY;
if(setrlimit(RLIMIT_CORE, &r) == -1) {
E_WARNING(E_STRLOC ": setrlimit() failed with '%s'\n", strerror(errno));
return -1;
}
int ret = start_child_process(cmd);
r.rlim_cur = old;
if(setrlimit(RLIMIT_CORE, &r) == -1) {
E_WARNING(E_STRLOC ": setrlimit() failed with '%s'\n", strerror(errno));
return -1;
}
return ret;
}
static bool start_child(const char* cmd) {
#ifdef HAVE_LIBSTARTUP_NOTIFICATION
run_async("ede-launch-sn --program %s --icon applications-order", cmd);
#endif
int ret = start_child_process_with_core(cmd);
if(ret == 199) {
alert(_("Program '%s' not found.\n\nPlease check if given path to the "
"executable was correct or adjust $PATH environment variable to "
"point to the directory where target executable exists"), cmd);
return false;
}
if(ret == EACCES) {
/* now check the if file is executable since EACCES is common error if not so */
if(access(cmd, X_OK) != 0)
alert(_("You are trying to execute '%s', but it is not executable file"), cmd);
else
alert(_("You do not have enough permissions to execute '%s'"), cmd);
return false;
}
return true;
}
static void cancel_cb(Fl_Widget*, void* w) {
LaunchWindow* win = (LaunchWindow*)w;
win->hide();
}
static void ok_cb(Fl_Widget*, void* w) {
LaunchWindow* win = (LaunchWindow*)w;
const char* cmd = dialog_input->value();
bool started = false;
win->hide();
/* do not block dialog when program is starting */
Fl::check();
/* TODO: is 'cmd' safe after hide? */
if(in_term->value()) {
char buf[128];
const char* term = getenv("TERM");
/* also check if TERM get inherited from login console */
if(!term || (strcmp(term, "linux") == 0) || (strcmp(term, "dumb") == 0))
term = "xterm";
snprintf(buf, sizeof(buf), "%s -e %s", term, cmd);
started = start_child(buf);
} else {
started = start_child(cmd);
}
if(!started) {
/* show dialog again */
win->show();
if(cmd)
dialog_input->position(0, dialog_input->size());
} else {
Resource rc;
rc.set("History", "open", cmd);
rc.save("ede-launch-history");
}
}
static int start_dialog(int argc, char** argv) {
LaunchWindow* win = new LaunchWindow(370, 195, _("Run Command"));
win->begin();
Fl_Box* icon = new Fl_Box(10, 10, 55, 55);
icon->image(image_run);
Fl_Box* txt = new Fl_Box(70, 10, 290, 69, _("Enter the name of the application you would like to run"));
txt->align(132|FL_ALIGN_INSIDE);
dialog_input = new Fl_Input(70, 90, 290, 25, _("Open:"));
Resource rc;
char buf[128];
if(rc.load("ede-launch-history") && rc.get("History", "open", buf, sizeof(buf))) {
dialog_input->value(buf);
/* make text appear selected */
dialog_input->position(0, dialog_input->size());
}
in_term = new Fl_Check_Button(70, 125, 290, 25, _("Run in terminal"));
in_term->down_box(FL_DOWN_BOX);
Fl_Button* ok = new Fl_Button(175, 160, 90, 25, _("&OK"));
ok->callback(ok_cb, win);
Fl_Button* cancel = new Fl_Button(270, 160, 90, 25, _("&Cancel"));
cancel->callback(cancel_cb, win);
win->end();
win->window_icon(run_xpm);
win->show(argc, argv);
return Fl::run();
}
int main(int argc, char** argv) {
EDE_APPLICATION("ede-launch");
if(argc <= 1)
return start_dialog(argc, argv);
/* do not see possible flags as commands */
if(argv[1][0] == '-') {
help();
return 0;
}
String args;
unsigned int alen;
for(int i = 1; i < argc; i++) {
args += argv[i];
args += ' ';
}
alen = args.length();
/* remove start/ending quotes and spaces */
if((args[0] == '"') || isspace(args[0]) || (args[alen - 1] == '"') || isspace(args[alen - 1])) {
int i;
char *copy = strdup(args.c_str());
char *ptr = copy;
/* remove ending first */
for(i = (int)alen - 1; i > 0 && (ptr[i] == '"' || isspace(ptr[i])); i--)
;
ptr[i + 1] = 0;
/* remove then starting */
for(; *ptr && (*ptr == '"' || isspace(*ptr)); ptr++)
;
start_child(ptr);
free(copy);
} else {
start_child(args.c_str());
}
return 0;
}
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