* cygerrno.h (set_errno): Define more informative version of this function for

debugging.
(__set_errno): Declare when DEBUGGING.
* cygheap.h (cygheap_fdget::cygheap_fdget): Add a flag to control when errno is
set.
* debug.cc (__set_errno): New function.
* fcntl.cc (_fcntl): Fix so that correct fd is used for second argument to
dup2.
* syscalls.cc (_cygwin_istext_for_stdio): Don't set errno here when using
cygheap_fdget.

1 files changed, 9 insertions, 0 deletions

diff --git a/winsup/cygwin/debug.cc b/winsup/cygwin/debug.cc
index e8293b91f..6de0757ab 100644
--- a/winsup/cygwin/debug.cc
+++ b/winsup/cygwin/debug.cc
@@ -14,6 +14,7 @@ details. */
 #include "perthread.h"
 #include "perprocess.h"
 #include "security.h"
+#include "cygerrno.h"
 
 #undef CloseHandle
 
@@ -348,4 +349,12 @@ close_handle (const char *func, int ln, HANDLE h, const char *name, BOOL force)
 #endif
   return ret;
 }
+
+/* Add a handle to the linked list of known handles. */
+void __stdcall
+__set_errno (const char *func, int ln, int val)
+{
+  debug_printf ("%s:%d val %d", func, ln, val);
+  _impure_ptr->_errno = val;
+}
 #endif /*DEBUGGING*/