gentoo-overlay/sci-astronomy/wcstools/files/wcstools-3.9.2-sprintf.patch

Author: Ole Streicher <olebole@debian.net>
Description: Fix overlappong buffers in sprintf
 In sprintf, overlapping buffers lead to undefined behaviour.
 This causes different results on Debian and Ubuntu.
--- a/imstar.c
+++ b/imstar.c
@@ -818,7 +818,7 @@
 	    sprintf (headline, "%7.2f %7.2f %6.2f  %d",
 		    sx[i],sy[i],smag[i],sp[i]);
 	    if (iswcs (wcs))
-		sprintf (headline, "%s %s %s", headline, rastr, decstr);
+		sprintf (headline + strlen(headline), " %s %s", rastr, decstr);
 	    if (wfile)
 		fprintf (fd, "%s\n", headline);
 	    else
@@ -827,14 +827,14 @@
 	else {
 	    sprintf (headline, "%3d %s %s %6.2f", i+1,rastr,decstr,smag[i]);
 	    if (wcs->nxpix < 100.0 && wcs->nypix > 100.0)
-		sprintf (headline, "%s  %5.2f %5.2f %d",
-		headline, sx[i],sy[i], sp[i]);
+		sprintf (headline + strlen(headline), "  %5.2f %5.2f %d",
+		sx[i],sy[i], sp[i]);
 	    else if (wcs->nxpix < 1000.0 && wcs->nypix < 1000.0)
-		sprintf (headline, "%s  %6.2f %6.2f %d",
-		headline, sx[i],sy[i], sp[i]);
+		sprintf (headline + strlen(headline), "  %6.2f %6.2f %d",
+		sx[i],sy[i], sp[i]);
 	    else
-		sprintf (headline, "%s  %7.2f %7.2f %d",
-		headline, sx[i],sy[i], sp[i]);
+		sprintf (headline + strlen(headline), "  %7.2f %7.2f %d",
+		sx[i],sy[i], sp[i]);
 	    if (wfile)
 		fprintf (fd, "%s\n", headline);
 	    else