From e47d5648355dba670df3abdf467c06b4f209a300 Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Fri, 11 Jul 2003 00:54:46 +0000
Subject: [PATCH] * path.cc (get_device_number): Remove special com? 
 consideration. (special_chars): Make static. (special_introducers): New.
 (special_char): Allow specified valid_chars args. (fnunmunge): Handle
 aux-like filenames correctly. (special_name): Add con, conin$, conout$.
 (mount_item::fnmunge): Use __small_sprintf return value to calculate
 increments.

---
 winsup/cygwin/ChangeLog |  11 +++++
 winsup/cygwin/path.cc   | 103 ++++++++++++++++++++--------------------
 2 files changed, 63 insertions(+), 51 deletions(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 45419e21d..a5399b125 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,14 @@
+2003-07-10  Christopher Faylor  <cgf@redhat.com>
+
+	* path.cc (get_device_number): Remove special com?  consideration.
+	(special_chars): Make static.
+	(special_introducers): New.
+	(special_char): Allow specified valid_chars args.
+	(fnunmunge): Handle aux-like filenames correctly.
+	(special_name): Add con, conin$, conout$.
+	(mount_item::fnmunge): Use __small_sprintf return value to calculate
+	increments.
+
 2003-07-09  Christopher Faylor  <cgf@redhat.com>
 
 	* include/cygwin/version.h: Bump DLL minor number to 1.
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index b7d16fddd..ff474fdf5 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -1099,15 +1099,6 @@ get_device_number (const char *unix_path, const char *w32_path, int &unit)
       if (devn == FH_BAD)
 	devn = get_raw_device_number (unix_path + 5, NULL, unit);
     }
-  else
-    {
-      char *p = strrchr (unix_path, '/');
-      if (p)
-	unix_path = p + 1;
-      if (udeveqn ("com", 3)
-	 && (unit = digits (unix_path + 3)) >= 0 && unit < 100)
-	devn = FH_SERIAL;
-    }
 
   return devn;
 }
@@ -1390,7 +1381,7 @@ set_flags (unsigned *flags, unsigned val)
     }
 }
 
-char special_chars[] =
+static char special_chars[] =
     "\001" "\002" "\003" "\004" "\005" "\006" "\007" "\010"
     "\011" "\012" "\013" "\014" "\015" "\016" "\017" "\020"
     "\021" "\022" "\023" "\024" "\025" "\026" "\027" "\030"
@@ -1400,28 +1391,66 @@ char special_chars[] =
     "I"    "J"    "K"    "L"    "M"    "N"    "O"    "P"
     "Q"    "R"    "S"    "T"    "U"    "V"    "W"    "X"
     "Y"    "Z";
+static char special_introducers[] = 
+    "anpcl";
 
-static inline char
-special_char (const char *s)
+static char
+special_char (const char *s, const char *valid_chars = special_chars)
 {
-  char *p = strechr (special_chars, *s);
-  if (*p == '%' && strlen (p) >= 3)
-    {
-      char hex[] = {s[1], s[2], '\0'};
-      unsigned char c = strtoul (hex, &p, 16);
-      p = strechr (special_chars, c);
-    }
+  if (*s != '%' || strlen (s) < 3)
+    return 0;
+
+  char *p;
+  char hex[] = {s[1], s[2], '\0'};
+  unsigned char c = strtoul (hex, &p, 16);
+  p = strechr (valid_chars, c);
   return *p;
 }
 
+/* Determines if name is "special".  Assumes that name is empty or "absolute" */
+static int
+special_name (const char *s, int inc = 1)
+{
+  if (!*s)
+    return false;
+
+  s += inc;
+  if (strpbrk (s, special_chars))
+    return !strncasematch (s, "%2f", 3);
+
+  if (strcasematch (s, "nul")
+      || strcasematch (s, "aux")
+      || strcasematch (s, "prn")
+      || strcasematch (s, "con")
+      || strcasematch (s, "conin$")
+      || strcasematch (s, "conout$"))
+    return -1;
+  if (!strncasematch (s, "com", 3)
+      && !strncasematch (s, "lpt", 3))
+    return false;
+  char *p;
+  (void) strtoul (s + 3, &p, 10);
+  return -(*p == '\0');
+}
+
 bool
 fnunmunge (char *dst, const char *src) 
 {
   bool converted = false;
   char c;
 
+  if ((c = special_char (src, special_introducers)))
+    {
+      __small_sprintf (dst, "%c%s", c, src + 3);
+      if (special_name (dst, 0))
+	{
+	  *dst++ = c;
+	  src += 3;
+	}
+    }
+
   while (*src)
-    if (*src != '%' || !(c = special_char (src)))
+    if (!(c = special_char (src)))
       *dst++ = *src++;
     else
       {
@@ -1434,28 +1463,6 @@ fnunmunge (char *dst, const char *src)
   return converted;
 }
 
-/* Determines if name is "special".  Assumes that name is empty or "absolute" */
-static int
-special_name (const char *s)
-{
-  if (!*s)
-    return false;
-
-  if (strpbrk (++s, special_chars))
-    return !strncasematch (s, "%2f", 3);
-
-  if (strcasematch (s, "nul")
-      || strcasematch (s, "aux")
-      || strcasematch (s, "prn"))
-    return -1;
-  if (!strncasematch (s, "com", 3)
-      && !strncasematch (s, "lpt", 3))
-    return false;
-  char *p;
-  (void) strtol (s, &p, 10);
-  return -(*p == '\0');
-}
-
 void
 mount_item::fnmunge (char *dst, const char *src)
 {
@@ -1467,19 +1474,13 @@ mount_item::fnmunge (char *dst, const char *src)
       char *d = dst;
       *d++ = *src++;
       if (name_type < 0)
-	{
-	  __small_sprintf (d, "%%%02x", (unsigned char) *src++);
-	  d += 3;
-	}
+	d += __small_sprintf (d, "%%%02x", (unsigned char) *src++);
 
       while (*src)
-	if (!special_char (src))
+	if (!strchr (special_chars, *src) || (*src == '%' && !special_char (src)))
 	  *d++ = *src++;
 	else
-	  {
-	    __small_sprintf (d, "%%%02x", (unsigned char) *src++);
-	    d += 3;
-	  }
+	  d += __small_sprintf (d, "%%%02x", (unsigned char) *src++);
       *d = *src;
     }