/* Runs the 'file' command on the given file, and returns the output
* (a verbose description of the file type) */
static char *
get_file_type_desc( const char *filename )
{
static char *cmd_output = NULL;
FILE *cmd;
double t0;
int len, c, i = 0;
char *cmd_line;
/* Allocate output buffer */
RESIZE(cmd_output, strlen( filename ) + 1024, char);
/* Construct command line */
len = strlen( FILE_COMMAND ) + strlen( filename ) - 1;
cmd_line = NEW_ARRAY(char, len);
sprintf( cmd_line, FILE_COMMAND, filename );
/* Open command stream */
cmd = popen( cmd_line, "r" );
xfree( cmd_line );
if (cmd == NULL) {
strcpy( cmd_output, _("Could not execute 'file' command") );
return cmd_output;
}
/* Read loop */
t0 = xgettime( );
while (!feof( cmd )) {
/* Read command's stdout */
c = fgetc( cmd );
if (c != EOF)
cmd_output[i++] = c;
/* Check for timeout condition */
if ((xgettime( ) - t0) > 5.0) {
fclose( cmd ); /* Is this allowed? */
strcpy( cmd_output, _("('file' command timed out)") );
return cmd_output;
}
/* Keep the GUI responsive */
gui_update( );
}
pclose( cmd );
cmd_output[i] = '\0';
len = strlen( filename );
if (!strncmp( filename, cmd_output, len )) {
/* Remove prepended "filename: " from output */
return &cmd_output[len + 2];
}
return cmd_output;
}
/* This checks if the widget associated with the given adjustment is
* currently busy redrawing/reconfiguring itself, or is in steady state
* (this is used when animating widgets to avoid changing the adjustment
* too often, otherwise the widget can't keep up and things slow down) */
boolean
gui_adjustment_widget_busy( GtkAdjustment *adj )
{
static const double threshold = (1.0 / 18.0);
double t_prev;
double t_now;
double *tp;
/* ---- HACK ALERT ----
* This doesn't actually check GTK+ internals-- I'm not sure which
* ones are relevant here. This just checks the amount of time that
* has passed since the last time the function was called with the
* same adjustment and returned FALSE, and if it's below a certain
* threshold, the object is considered "busy" (returning TRUE) */
t_now = xgettime( );
tp = gtk_object_get_data( GTK_OBJECT(adj), "t_prev" );
if (tp == NULL) {
tp = NEW(double);
*tp = t_now;
gtk_object_set_data_full( GTK_OBJECT(adj), "t_prev", tp, _xfree );
return FALSE;
}