* cygerrno.h: New file. Use this throughout whenever errno manipulation is

required.
* errno.cc: Use DWORD to hold Windows errors.
(geterrno_from_win_error): New function.
(seterrno_from_win_error): Use geterrno_from_win_error to convert supplied
windows error (suggested by Corinna Vinschen).
* path.cc (symlink_info): Add error element.
* path.cc (path_conv::check): Remove errno setting.  Use new symlink_info errno
element to set path_conv error, where appropriate.
(symlink_info::check): Set error element rather than attempting to manipulate
errno.  Add more checks for trailing / and /..  even though they are currently
useless.  Avoid setting EINVAL.
* path.cc (normalize_posix_path): Correct check for trailing /.

1 files changed, 34 insertions, 0 deletions

diff --git a/winsup/cygwin/cygerrno.h b/winsup/cygwin/cygerrno.h
new file mode 100644
index 000000000..c83120095
--- /dev/null
+++ b/winsup/cygwin/cygerrno.h
@@ -0,0 +1,34 @@
+/* cygerrno.h: main Cygwin header file.
+
+   Copyright 2000 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+void __stdcall seterrno_from_win_error (const char *file, int line, DWORD code);
+void __stdcall seterrno (const char *, int line);
+int __stdcall geterrno_from_win_error (DWORD code, int deferrno);
+
+#define __seterrno() seterrno (__FILE__, __LINE__)
+#define __seterrno_from_win_error(val) seterrno_from_win_error (__FILE__, __LINE__, val)
+
+#define set_errno(val) (_impure_ptr->_errno = (val))
+#define get_errno()  (_impure_ptr->_errno)
+extern "C" void __stdcall set_sig_errno (int e);
+
+class save_errno
+  {
+    int saved;
+  public:
+    save_errno () {saved = get_errno ();}
+    save_errno (int what) {saved = get_errno (); set_errno (what); }
+    void set (int what) {set_errno (what); saved = what;}
+    void reset () {saved = get_errno ();}
+    ~save_errno () {set_errno (saved);}
+  };
+
+extern const char *__sp_fn;
+extern int __sp_ln;