bug on SunOS 4

[David Monniaux <monniaux clipper ens fr>]

getcwd() is broken on SunOS 4. That results in gimp freezing X when
selecting "Open" from the file menu.

Here underneath is a patch to have Gtk use getwd() instead.

Observation: the X freeze is due to some grab being released too late.
It is a bad idea IMHO to do file I/O while have a X grab.
That grab should therefore be released quicker.

As for the source of the bug with getcwd() on SunOS 4, it is some
neverending wait4(). getcwd on SunOS 4 (contrary to getwd) is implemented
with a pipe() and vfork() (the actual function runs in another process).
The signal handling after this is badly done, maybe interfering with the
one for GTK.

-- David

diff -cr gtk+-0.99.9-unpatched/gtk/gtkfilesel.c
gtk+-0.99.9/gtk/gtkfilesel.c
*** gtk+-0.99.9-unpatched/gtk/gtkfilesel.c      Fri Mar 27 17:50:44 1998
--- gtk+-0.99.9/gtk/gtkfilesel.c        Thu Apr  2 17:46:51 1998
***************
*** 1504,1510 ****
  
    new_state = g_new (CompletionState, 1);
  
!   if (!getcwd (getcwd_buf, MAXPATHLEN))
      {
        cmpl_errno = errno;
        return NULL;
--- 1504,1510 ----
  
    new_state = g_new (CompletionState, 1);
  
!   if (!getwd (getcwd_buf))
      {
        cmpl_errno = errno;
        return NULL;
***************
*** 2108,2114 ****
    gchar buffer[MAXPATHLEN];
    gchar buffer2[MAXPATHLEN];
  
!   if(!getcwd(buffer, MAXPATHLEN))
      {
        cmpl_errno = errno;
        return NULL;
--- 2108,2114 ----
    gchar buffer[MAXPATHLEN];
    gchar buffer2[MAXPATHLEN];
  
!   if(!getwd(buffer))
      {
        cmpl_errno = errno;
        return NULL;
***************
*** 2120,2126 ****
        return NULL;
      }
  
!   if(!getcwd(buffer2, MAXPATHLEN))
      {
        chdir(buffer);
        cmpl_errno = errno;
--- 2120,2126 ----
        return NULL;
      }
  
!   if(!getwd(buffer2))
      {
        chdir(buffer);
        cmpl_errno = errno;