[Swig-user] Bug in Swig_string_command() (1.3.29)

[Robert L. <rh...@as...>]

While looking into using %rename("%(command ...)"), I noticed that
Swig_string_command() tests the value of errno but doesn't clear
it.  This shows up as the error message (on os/x anyway):
	
SWIG:1: Error: Command encoder fails attempting 'perl -pe 's/^act(.)/ 
\l$1/' <<< actImageInit'.

The simplest fix is:

*** misc.c~     Mon Mar  6 17:51:00 2006
--- misc.c      Fri Apr 14 12:57:23 2006
***************
*** 776,781 ****
--- 776,782 ----
     if (Len(s)) {
       char *command = Char(s);
       FILE *fp = popen(command,"r");
+     errno = 0;
       if (fp) {
         char buffer[1025];
         while(fscanf(fp,"%1024s",buffer) != EOF) {

And a trivial test case is appended.

				R


// -*- C -*-
%module renameBug;

%rename("%(command:perl -pe 's/^act(.)/\l$1/' <<< )s") "";

%{
    typedef struct { int foo; } actImage;
    actImage *actImageInit(void) { fprintf(stderr,"Hello World\n");  
return NULL; }
%}

actImage *actImageInit(void);