From c02e32c9bd099994f6042d079051d1aa574f619e Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Wed, 26 Dec 2001 17:46:12 +0000
Subject: [PATCH] * cygpath.cc (doit): Detect and warn about an empty path. 
 Detect and warn about errors converting a path. (main): Set prog_name
 correctly -- don't leave an extra slash or backslash at the beginning of it.

---
 winsup/utils/ChangeLog  |  7 +++++++
 winsup/utils/cygpath.cc | 32 +++++++++++++++++++++++++-------
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/winsup/utils/ChangeLog b/winsup/utils/ChangeLog
index 186a98dc4..0bfbce07e 100644
--- a/winsup/utils/ChangeLog
+++ b/winsup/utils/ChangeLog
@@ -1,3 +1,10 @@
+2001-12-26  Jonathan Kamens  <jik@curl.com>
+
+	* cygpath.cc (doit): Detect and warn about an empty path.  Detect and
+	warn about errors converting a path.
+	(main): Set prog_name correctly -- don't leave an extra slash or
+	backslash at the beginning of it.
+
 Fri Dec 14 14:04:37 2001  Jason Tishler <jason@tishler.net>
 
 	* mkpasswd.c (enum_users): Change to unconditionally use
diff --git a/winsup/utils/cygpath.cc b/winsup/utils/cygpath.cc
index bac8b42db..2ba54a185 100644
--- a/winsup/utils/cygpath.cc
+++ b/winsup/utils/cygpath.cc
@@ -141,6 +141,8 @@ doit (char *filename)
 {
   char *buf;
   size_t len;
+  int retval;
+  int (*conv_func)(const char *, char *);
 
   if (path_flag)
     {
@@ -155,7 +157,14 @@ doit (char *filename)
     }
 
   if (! path_flag)
-    len = strlen (filename) + 100;
+    {
+      len = strlen (filename) + 100;
+      if (len == 100)
+        {
+          fprintf(stderr, "%s: can't convert empty path\n", prog_name);
+          exit (1);
+        }
+    }
   else
     {
       if (unix_flag)
@@ -188,13 +197,20 @@ doit (char *filename)
   else
     {
       if (unix_flag)
-	(absolute_flag ? cygwin_conv_to_full_posix_path : cygwin_conv_to_posix_path) (filename, buf);
+	conv_func = (absolute_flag ? cygwin_conv_to_full_posix_path : 
+                     cygwin_conv_to_posix_path);
       else
-	{
-	  (absolute_flag ? cygwin_conv_to_full_win32_path : cygwin_conv_to_win32_path) (filename, buf);
-	  if (shortname_flag)
-	    buf = get_short_name (buf);
-	}
+        conv_func = (absolute_flag ? cygwin_conv_to_full_win32_path :
+                     cygwin_conv_to_win32_path);
+      retval = conv_func (filename, buf);
+      if (retval < 0)
+        {
+          fprintf (stderr, "%s: error converting \"%s\"\n",
+                   prog_name, filename);
+          exit (1);
+        }
+      if (!unix_flag && shortname_flag)
+        buf = get_short_name (buf);
     }
 
   puts (buf);
@@ -214,6 +230,8 @@ main (int argc, char **argv)
     prog_name = strrchr (argv[0], '\\');
   if (prog_name == NULL)
     prog_name = argv[0];
+  else
+    prog_name++;
 
   path_flag = 0;
   unix_flag = 0;