[syslinux] TFTP progress indicator

[Geert Stappers]

Hello,


This is from  http://wormfood.net/pxelinux_tftp_progress_display.patch

--- syslinux-6.03-original/core/fs/pxe/pxe.c	2014-10-07 00:27:44.000000000 +0800
+++ syslinux-6.03/core/fs/pxe/pxe.c	2015-04-16 17:28:49.000000000 +0800
@@ -197,29 +197,47 @@
 			     int blocks, bool *have_more)
 {
     struct inode *inode = file->inode;
     struct pxe_pvt_inode *socket = PVT(inode);
     int count = blocks;
     int chunk;
     int bytes_read = 0;
+    int printed = 0; /* The number of bytes output by the percentage display */
+    int percent;
+    bool verbose = true; /* display progress flag - we need to be passed a flag to tell if we're quiet or not, and set this accordingly */
+    int percentage = -1;
 
     count <<= TFTP_BLOCKSIZE_LG2;
+    if ( blocks < 512 ) /* don't display the progress for small files. */
+        verbose=false; /* This should not be needed, once the verbose flag is properly passed from other parts of the program */
+
+    if (verbose)
+        percent=(count/1000); /* one tenth, of one percent, really */
+    
     while (count) {
         fill_buffer(inode); /* If we have no 'fresh' buffer, get it */
         if (!socket->tftp_bytesleft)
             break;
 
         chunk = count;
         if (chunk > socket->tftp_bytesleft)
             chunk = socket->tftp_bytesleft;
         socket->tftp_bytesleft -= chunk;
         memcpy(buf, socket->tftp_dataptr, chunk);
 	socket->tftp_dataptr += chunk;
         buf += chunk;
         bytes_read += chunk;
+	if ( verbose ) {
+	    if ( percentage != bytes_read/percent ) { /* only print percentage if it increases */
+	        percentage = bytes_read/percent; /* record the current position in the file, as a percentage */
+                while (printed--) /* before we print the new percentage, backspace over what we printed previously. */
+		    printf("\b");
+                printed = printf("%3d.%.1d%% ", percentage/10, percentage%10);
+	    }
+	}
         count -= chunk;
     }
 
 
     if (socket->tftp_bytesleft || (socket->tftp_filepos < inode->size)) {
 	fill_buffer(inode);
         *have_more = 1;




Groeten
Geert Stappers
-- 
Leven en laten leven