/**
* egg_desktop_file_parse_exec:
* @desktop_file: a #EggDesktopFile
* @documents: a list of document paths or URIs
* @error: error pointer
*
* Parses @desktop_file's Exec key, inserting @documents into it, and
* returns the result.
*
* If @documents contains non-file: URIs and @desktop_file does not
* accept URIs, those URIs will be ignored. Likewise, if @documents
* contains more elements than @desktop_file accepts, the extra
* documents will be ignored.
*
* Return value: the parsed Exec string
**/
char *
egg_desktop_file_parse_exec (EggDesktopFile * desktop_file, GSList * documents,
GError ** error)
{
GSList *translated, *docs;
char *command;
docs = translated = translate_document_list (desktop_file, documents);
command = parse_exec (desktop_file, &docs, error);
free_document_list (translated);
return command;
}
int main(int argc, char *argv[], char *envp[]){
root = NULL;
history = NULL;
exit_num = 0;
size_t buff = BUFFSIZE;
int bytes_read;
char * cmd_line;
cmd_line = (char*)malloc(buff + 1);
for(;;){
#ifdef PROMPT
printf("==>");
#endif
bytes_read = getline(&cmd_line,&buff,stdin);//yeah prompt but stupid trailing newline
if (bytes_read == -1){return 1;}
else if(cmd_line[strlen(cmd_line) -1] == '\n'){
cmd_line[strlen(cmd_line) -1] = '\0';
}
history = stack_push(history,cmd_line);
cmd_line = sub_q(cmd_line);
exit_num = parse_exec(cmd_line);
}
printf("goodbye\n");
return 1;
}
static gboolean
egg_desktop_file_launchv (EggDesktopFile *desktop_file,
GSList *documents, va_list args,
GError **error)
{
EggDesktopFileLaunchOption option;
GSList *translated_documents = NULL, *docs = NULL;
char *command, **argv;
int argc, i, screen_num;
gboolean success, current_success;
GdkDisplay *display;
char *startup_id;
GPtrArray *env = NULL;
char **variables = NULL;
GdkScreen *screen = NULL;
int workspace = -1;
const char *directory = NULL;
guint32 launch_time = (guint32)-1;
GSpawnFlags flags = G_SPAWN_SEARCH_PATH;
GSpawnChildSetupFunc setup_func = NULL;
gpointer setup_data = NULL;
GPid *ret_pid = NULL;
int *ret_stdin = NULL, *ret_stdout = NULL, *ret_stderr = NULL;
char **ret_startup_id = NULL;
if (documents && desktop_file->document_code == 0)
{
g_set_error (error, EGG_DESKTOP_FILE_ERROR,
EGG_DESKTOP_FILE_ERROR_NOT_LAUNCHABLE,
_("Application does not accept documents on command line"));
return FALSE;
}
/* Read the options: technically it's incorrect for the caller to
* NULL-terminate the list of options (rather than 0-terminating
* it), but NULL-terminating lets us use G_GNUC_NULL_TERMINATED,
* it's more consistent with other glib/gtk methods, and it will
* work as long as sizeof (int) <= sizeof (NULL), and NULL is
* represented as 0. (Which is true everywhere we care about.)
*/
while ((option = va_arg (args, EggDesktopFileLaunchOption)))
{
switch (option)
{
case EGG_DESKTOP_FILE_LAUNCH_CLEARENV:
if (env)
g_ptr_array_free (env, TRUE);
env = g_ptr_array_new ();
break;
case EGG_DESKTOP_FILE_LAUNCH_PUTENV:
variables = va_arg (args, char **);
for (i = 0; variables[i]; i++)
env = array_putenv (env, variables[i]);
break;
case EGG_DESKTOP_FILE_LAUNCH_SCREEN:
screen = va_arg (args, GdkScreen *);
break;
case EGG_DESKTOP_FILE_LAUNCH_WORKSPACE:
workspace = va_arg (args, int);
break;
case EGG_DESKTOP_FILE_LAUNCH_DIRECTORY:
directory = va_arg (args, const char *);
break;
case EGG_DESKTOP_FILE_LAUNCH_TIME:
launch_time = va_arg (args, guint32);
break;
case EGG_DESKTOP_FILE_LAUNCH_FLAGS:
flags |= va_arg (args, GSpawnFlags);
/* Make sure they didn't set any flags that don't make sense. */
flags &= ~G_SPAWN_FILE_AND_ARGV_ZERO;
break;
case EGG_DESKTOP_FILE_LAUNCH_SETUP_FUNC:
setup_func = va_arg (args, GSpawnChildSetupFunc);
setup_data = va_arg (args, gpointer);
break;
case EGG_DESKTOP_FILE_LAUNCH_RETURN_PID:
ret_pid = va_arg (args, GPid *);
break;
case EGG_DESKTOP_FILE_LAUNCH_RETURN_STDIN_PIPE:
ret_stdin = va_arg (args, int *);
break;
case EGG_DESKTOP_FILE_LAUNCH_RETURN_STDOUT_PIPE:
ret_stdout = va_arg (args, int *);
break;
case EGG_DESKTOP_FILE_LAUNCH_RETURN_STDERR_PIPE:
ret_stderr = va_arg (args, int *);
break;
case EGG_DESKTOP_FILE_LAUNCH_RETURN_STARTUP_ID:
ret_startup_id = va_arg (args, char **);
break;
default:
g_set_error (error, EGG_DESKTOP_FILE_ERROR,
EGG_DESKTOP_FILE_ERROR_UNRECOGNIZED_OPTION,
_("Unrecognized launch option: %d"),
GPOINTER_TO_INT (option));
success = FALSE;
goto out;
}
}
if (screen)
{
char *display_name = gdk_screen_make_display_name (screen);
char *display_env = g_strdup_printf ("DISPLAY=%s", display_name);
env = array_putenv (env, display_env);
g_free (display_name);
g_free (display_env);
display = gdk_screen_get_display (screen);
}
else
{
display = gdk_display_get_default ();
screen = gdk_display_get_default_screen (display);
}
screen_num = gdk_screen_get_number (screen);
translated_documents = translate_document_list (desktop_file, documents);
docs = translated_documents;
success = FALSE;
do
{
command = parse_exec (desktop_file, &docs, error);
if (!command)
goto out;
if (!g_shell_parse_argv (command, &argc, &argv, error))
{
g_free (command);
goto out;
}
g_free (command);
#if GTK_CHECK_VERSION (2, 12, 0)
startup_id = start_startup_notification (display, desktop_file,
argv[0], screen_num,
workspace, launch_time);
if (startup_id)
{
char *startup_id_env = g_strdup_printf ("DESKTOP_STARTUP_ID=%s",
startup_id);
env = array_putenv (env, startup_id_env);
g_free (startup_id_env);
}
#else
startup_id = NULL;
#endif /* GTK 2.12 */
if (env != NULL)
g_ptr_array_add (env, NULL);
current_success =
g_spawn_async_with_pipes (directory,
argv,
env ? (char **)(env->pdata) : NULL,
flags,
setup_func, setup_data,
ret_pid,
ret_stdin, ret_stdout, ret_stderr,
error);
g_strfreev (argv);
if (startup_id)
{
#if GTK_CHECK_VERSION (2, 12, 0)
if (current_success)
{
set_startup_notification_timeout (display, startup_id);
if (ret_startup_id)
*ret_startup_id = startup_id;
else
g_free (startup_id);
}
else
#endif /* GTK 2.12 */
g_free (startup_id);
}
else if (ret_startup_id)
*ret_startup_id = NULL;
if (current_success)
{
/* If we successfully launch any instances of the app, make
* sure we return TRUE and don't set @error.
*/
success = TRUE;
error = NULL;
/* Also, only set the output params on the first one */
ret_pid = NULL;
ret_stdin = ret_stdout = ret_stderr = NULL;
ret_startup_id = NULL;
}
}
while (docs && current_success);
out:
if (env)
{
g_ptr_array_foreach (env, (GFunc)g_free, NULL);
g_ptr_array_free (env, TRUE);
}
free_document_list (translated_documents);
return success;
}
int parse_exec(const char* input){
if(input[0] == '\0'){return 1;}
int ret = 0;
int head = 0;
int pipev = NO_PIPE;
int pipeline = 0;
char * parsable = (char *)strdup(input);
if (parsable == NULL){
return 1;
}
char * command = NULL;
char * params = NULL;
char * file = NULL;
for(;parsable[head] == ' ' || parsable[head] == '\t';head++){}
int tail = head;
for(;parsable[head] != '\0';head++){
if((parsable[head] == ' ' || parsable[head] == '\t') && command == NULL && pipev == NO_PIPE){//first word terminated by space character
command = (char *)malloc(sizeof(char) *(head - tail + 1));
if (command == NULL){return 1;}
if (strncpy(command,parsable + tail,head-tail) == NULL){return 1;}
command[head-tail] = '\0';
for(;parsable[head] == ' ' || parsable[head] == '\t';head++){}//discard any extra spaces after the first one
tail = head;
head--;//the head is at the next character but is going to get incremented so we must decrement first
}
else if((parsable[head] == '<' || parsable[head] == '>') && pipev == NO_PIPE){
if (parsable[head] == '<'){// this has a bug that I don't need to fix because the spec changed
pipev = PIPE_IN;
}
else {
pipev = PIPE_OUT;
}
if (tail != head){
if(command == NULL){//the first word is terminated with a pipe rather than a space
command = (char *)malloc(head - tail + 1);
if (strncpy(command,parsable + tail,head-tail) == NULL){return 1;}
command[head-tail] = '\0';
tail = head + 1;//We set the tail ahead of the head so that we don't include the current character
}
else {
int back = head;
for(;parsable[back] == ' ' || parsable[back] == '\t' || parsable[back] == '>'|| parsable[back] == '<';back--){}
back++;
params = (char *)malloc(back - tail + 1);
if (strncpy(params,parsable + tail,back-tail) == NULL){return 1;}
params[back-tail] = '\0';
tail = head + 1;
}
}
}
else if(parsable[head] == '|'){
if (pipev != NO_PIPE){//redirect was found first
for(;parsable[tail] == ' ' || parsable[tail] == '\t';tail++);//no reason to have spaces at head of the redirect file
if (head != tail){//redirect was not the previous character
file = (char *)malloc(head - tail + 1);
if (strncpy(file,parsable + tail,head-tail) == NULL){return 1;}
file[head-tail] = '\0';
}
}
else if(command == NULL){
if(tail != head){//the first word is terminated with a pipe rather than a space
command = (char *)malloc(head - tail + 1);
if (strncpy(command,parsable + tail,head-tail) == NULL){return 1;}
command[head-tail] = '\0';
}
//this "branch" denotes that the pipe is the first character
}
else {// input with params and no redirect or a few other things
int back = head;
for(;parsable[back] == ' ' || parsable[back] == '\t' || parsable[back] == '|';back--){}
back++;
if(tail < back){
params = (char *)malloc(back - tail + 1);
if (strncpy(params,parsable + tail,back-tail) == NULL){return 1;}
params[back-tail] = '\0';
}
}
pipeline = 1;
head++;
tail = head;//Now both head and tail should be set ahead of the pipe
break;
}
}
if(tail != head){
if(parsable[tail] == '<' || parsable[tail] == '>' || parsable[tail] == '|'){tail++;}
for(;tail < strlen(parsable) && (parsable[tail] == ' ' || parsable[tail] == '\t');tail++);
}
if(tail != head && pipeline == 0){
if(pipev == PIPE_IN || pipev == PIPE_OUT){
file = (char *)malloc(head - tail + 1);
if (strncpy(file,parsable + tail,head-tail) == NULL){return 1;}
file[head-tail] = '\0';
tail = head;
}
else if(command == NULL){
command = (char *)malloc(head - tail + 1);
if (strncpy(command,parsable + tail,head-tail) == NULL){return 1;}
command[head-tail] = '\0';
tail = head;
}
else {
int num = head-tail;
params = (char *)malloc(sizeof(char)*(head - tail + 1));
if (strncpy(params,parsable + tail,num) == NULL){return 1;}
params[head-tail] = '\0';
tail = head;
}
}
if(DEBUG == 1){
if(command != NULL){
printf("Command is: %s\n", command);
}
if(params != NULL){
printf("Params are: %s\n", params);
}
if(file != NULL){
printf("File is: %s\n", file);
}
printf("pipev: %d\n",pipev);
printf("pipeline: %d\n",pipeline);
}
int oldredir;
int pipefile;
if(pipev == PIPE_IN){
oldredir = dup(STDIN_FILENO);
if(file != NULL){
pipefile = open(file,O_RDONLY);//add file check
dup2(pipefile,STDIN_FILENO);
close(pipefile);
}
}
else if(pipev == PIPE_OUT){
oldredir = dup(STDOUT_FILENO);
fflush(stdout);
if(file != NULL){
pipefile = open(file,O_WRONLY|O_CREAT,0777);
dup2(pipefile,STDOUT_FILENO);
close(pipefile);
}
else {
dup2(STDIN_FILENO,STDOUT_FILENO);
}
}
if(pipeline == 1){
int oldredir2;
int tubing[2];
pid_t pid;
if (pipe(tubing) < 0) {return 1;}
if ((pid = fork()) < 0) {return 1;}
else if (pid == 0){
close(tubing[1]);
oldredir2 = dup(STDIN_FILENO);
dup2(tubing[0], STDIN_FILENO);
ret = parse_exec(&parsable[head]);
close(tubing[0]);
dup2(oldredir2, STDIN_FILENO);
exit(ret);
}
else {
fflush(stdout);
close(tubing[0]);
oldredir2 = dup(STDOUT_FILENO);
dup2(tubing[1], STDOUT_FILENO);
find_and_exec(command,params);
fflush(stdout);
close(tubing[1]);
dup2(oldredir2, STDOUT_FILENO);
wait(&ret);
}
}
else{
ret = find_and_exec(command,params);
}
if(pipev == PIPE_IN){
dup2(oldredir,STDIN_FILENO);
}
else if(pipev == PIPE_OUT){
fflush(stdout);
dup2(oldredir,STDOUT_FILENO);
}
return ret;
}