* include/sys/cygwin.h (CW_SETERRNO): Define.

* external.cc (CW_SETERRNO): Implement.
* include/cygwin/version.h: Bump CYGWIN_VERSION_API_MINOR to 192 to reflect the
above change.
* path.cc (path_prefix_p): Treat X: as equivalent to x:.
* mkglobals_h: Remove unneeded #define.
* spawn.cc (spawn_guts): Avoid overly wordy initialization to zero.

1 files changed, 14 insertions, 2 deletions

diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index da96cde01..f736be496 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -169,8 +169,20 @@ path_prefix_p (const char *path1, const char *path2, int len1,
     return isdirsep (path2[0]) && !isdirsep (path2[1]);
 
   if (isdirsep (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':')
-    return caseinsensitive ? strncasematch (path1, path2, len1)
-			   : !strncmp (path1, path2, len1);
+    {
+      if (len1 < 2 || (path1[1] != ':') || (path2[1] != ':'))
+	/* nothing */;
+      else if (tolower (*path1) != tolower(*path2))
+	return 0;
+      else
+	{
+	  path1 += 2;
+	  path2 += 2;
+	  len1 -= 2;
+	}
+      return caseinsensitive ? strncasematch (path1, path2, len1)
+			     : !strncmp (path1, path2, len1);
+    }
 
   return 0;
 }