* exceptions.cc (interruptible): Allocate slightly more space for directory

name check.  Windows 95 seems to null-terminate the directory otherwise.
(interrupt_on_return): Issue a fatal error if we can't find the caller's stack.
* spawn.cc (find_exec): Accept a path_conv argument rather than a buffer so
that the caller can find things out about a translated path.
(perhaps_suffix): Ditto.
(spawn_guts): Allocate path_conv stuff here so that we can find out stuff about
the translated path (this is work in progress).
* environ.cc (environ_init): Accept an as-yet unused argument indicating
whether we were invoked from a cygwin parent or not.
(winenv): Ditto.
(posify): Accept an argument indicating whether the path has already been
translated.
* dlfcn.cc (check_access): Provide a path_conv buffer to find_exec.
* exec.cc (sexecvpe): Ditto.
* path.cc (path_conv::check): Rename from path_conv::path_conv.
(mount_item::getmntent): Recognize "Cygwin executable" bit.
(symlink_info::check): Remove debugging statements.
* path.h (class path_conv): Add iscygexec method.  Rewrite constructor to call
"check" method to allow multiple operations on a path_conv variable.
* pinfo.cc (pinfo_init): Pass argument to environ_init.
* shared.h: Bump PROC_MAGIC.
* winsup.h: Reflect above changes to function arguments.
* include/sys/mount.h: Add MOUNT_CYGWIN_EXEC type.

1 files changed, 21 insertions, 14 deletions

diff --git a/winsup/cygwin/environ.cc b/winsup/cygwin/environ.cc
index b09fe90e9..7b9c33ac0 100644
--- a/winsup/cygwin/environ.cc
+++ b/winsup/cygwin/environ.cc
@@ -94,7 +94,7 @@ getwinenv (const char *env, const char *in_posix)
 /* Convert windows path specs to POSIX, if appropriate.
  */
 static void __stdcall
-posify (char **here, const char *value)
+posify (int already_posix, char **here, const char *value)
 {
   char *src = *here;
   win_env *conv;
@@ -103,17 +103,22 @@ posify (char **here, const char *value)
   if (!(conv = getwinenv (src)))
     return;
 
-  /* Turn all the items from c:<foo>;<bar> into their
-     mounted equivalents - if there is one.  */
+  if (already_posix)
+    conv->add_cache (value, NULL);
+  else
+    {
+      /* Turn all the items from c:<foo>;<bar> into their
+	 mounted equivalents - if there is one.  */
 
-  char *outenv = (char *) malloc (1 + len + conv->posix_len (value));
-  memcpy (outenv, src, len);
-  conv->toposix (value, outenv + len);
-  conv->add_cache (outenv + len, value);
+      char *outenv = (char *) malloc (1 + len + conv->posix_len (value));
+      memcpy (outenv, src, len);
+      conv->toposix (value, outenv + len);
+      conv->add_cache (outenv + len, value);
 
-  debug_printf ("env var converted to %s", outenv);
-  *here = outenv;
-  free (src);
+      debug_printf ("env var converted to %s", outenv);
+      *here = outenv;
+      free (src);
+    }
 }
 
 /*
@@ -435,7 +440,7 @@ regopt (const char *name)
  * environment variable and set appropriate options from it.
  */
 void
-environ_init (void)
+environ_init (int already_posix)
 {
   const char * const rawenv = GetEnvironmentStrings ();
   int envsize, i;
@@ -479,7 +484,7 @@ environ_init (void)
       if (strncmp (newp, "CYGWIN=", sizeof("CYGWIN=") - 1) == 0)
 	parse_options (newp + sizeof("CYGWIN=") - 1);
       if (*eq)
-	posify (envp + i, *++eq ? eq : --eq);
+	posify (already_posix, envp + i, *++eq ? eq : --eq);
       debug_printf ("%s", envp[i]);
     }
 
@@ -509,7 +514,7 @@ env_sort (const void *a, const void *b)
  * prior to placing them in the string.
  */
 char * __stdcall
-winenv (const char * const *envp)
+winenv (const char * const *envp, int keep_posix)
 {
   int len, n, tl;
   const char * const *srcp;
@@ -520,12 +525,14 @@ winenv (const char * const *envp)
 
   const char *newenvp[n + 1];
 
+  debug_printf ("envp %p, keep_posix %d", envp, keep_posix);
+
   for (tl = 0, srcp = envp, dstp = newenvp; *srcp; srcp++, dstp++)
     {
       len = strcspn (*srcp, "=") + 1;
       win_env *conv;
 
-      if ((conv = getwinenv (*srcp, *srcp + len)))
+      if (!keep_posix && (conv = getwinenv (*srcp, *srcp + len)))
 	*dstp = conv->native;
       else
 	*dstp = *srcp;