* Makefile.in (cygcheck.exe): Compile as -mno-cygwin executable.

* path.cc: New file.
* cygcheck.cc (init_paths): Use MS-DOS path syntax.
(cygwin_info): Properly display cygwin version numbers.  Prettify some output.
(dump_sysinfo): Calculate max names of posix and ms-dos paths for prettier
output.

1 files changed, 350 insertions, 0 deletions

diff --git a/winsup/utils/path.cc b/winsup/utils/path.cc
new file mode 100644
index 000000000..7670904c8
--- /dev/null
+++ b/winsup/utils/path.cc
@@ -0,0 +1,350 @@
+/*
+ * Copyright (c) 2000, Red Hat, Inc.
+ *
+ *     This program is free software; you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation; either version 2 of the License, or
+ *     (at your option) any later version.
+ *
+ *     A copy of the GNU General Public License can be found at
+ *     http://www.gnu.org/
+ *
+ * Written by DJ Delorie <dj@cygnus.com>
+ *
+ */
+
+/* The purpose of this file is to hide all the details about accessing
+   Cygwin's mount table.  If the format or location of the mount table
+   changes, this is the file to change to match it. */
+
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <cygwin/version.h>
+#include <sys/mount.h>
+#include <mntent.h>
+
+/* Used when treating / and \ as equivalent. */
+#define SLASH_P(ch) \
+  ({ \
+      char __c = (ch); \
+      ((__c) == '/' || (__c) == '\\'); \
+   })
+
+
+static struct mnt
+  {
+    const char *native;
+    char *posix;
+    unsigned flags;
+    int issys;
+  } mount_table[255];
+
+struct mnt *root_here = NULL;
+
+static char *
+find2 (HKEY rkey, unsigned *flags, char *what)
+{
+  char *retval = 0;
+  DWORD retvallen = 0;
+  DWORD type;
+  HKEY key;
+
+  if (RegOpenKeyEx (rkey, what, 0, KEY_READ, &key) != ERROR_SUCCESS)
+    return 0;
+
+  if (RegQueryValueEx (key, "native", 0, &type, 0, &retvallen)
+      == ERROR_SUCCESS)
+    {
+      retval = (char *) malloc (MAX_PATH + 1);
+      if (RegQueryValueEx (key, "native", 0, &type, (BYTE *) retval, &retvallen)
+	  != ERROR_SUCCESS)
+	{
+	  free (retval);
+	  retval = 0;
+	}
+    }
+
+  retvallen = sizeof (flags);
+  RegQueryValueEx (key, "flags", 0, &type, (BYTE *)flags, &retvallen);
+
+  RegCloseKey (key);
+
+  return retval;
+}
+
+static LONG
+get_cygdrive0 (HKEY key, const char *what, void *val, DWORD len)
+{
+  LONG status = RegQueryValueEx (key, what, 0, 0, (BYTE *)val, &len);
+  return status;
+}
+
+static mnt *
+get_cygdrive (HKEY key, mnt *m, int issystem)
+{
+
+  if (get_cygdrive0 (key, CYGWIN_INFO_CYGDRIVE_FLAGS, &m->flags,
+		     sizeof (m->flags)) != ERROR_SUCCESS) {
+    free (m->posix);
+    return m;
+  }
+  get_cygdrive0 (key, CYGWIN_INFO_CYGDRIVE_PREFIX, m->posix, MAX_PATH);
+  m->native = strdup (".");
+  return m + 1;
+}
+
+void
+read_mounts ()
+{
+  DWORD posix_path_size;
+  int res;
+  struct mnt *m = mount_table;
+  DWORD disposition;
+  char buf[10000];
+
+  root_here = NULL;
+  for (mnt *m1 = mount_table; m1->posix; m1++)
+    {
+      free (m1->posix);
+      if (m1->native)
+	free ((char *) m1->native);
+      m1->posix = NULL;
+    }
+
+  /* Loop through subkeys */
+  /* FIXME: we would like to not check MAX_MOUNTS but the heap in the
+     shared area is currently statically allocated so we can't have an
+     arbitrarily large number of mounts. */
+  for (int issystem = 0; issystem <= 1; issystem++)
+    {
+      sprintf (buf, "Software\\%s\\%s\\%s",
+	       CYGWIN_INFO_CYGNUS_REGISTRY_NAME,
+	       CYGWIN_INFO_CYGWIN_REGISTRY_NAME,
+	       CYGWIN_INFO_CYGWIN_MOUNT_REGISTRY_NAME);
+
+      HKEY key = issystem ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+      if (RegCreateKeyEx (key, buf, 0, (LPTSTR) "Cygwin", 0, KEY_ALL_ACCESS,
+			  0, &key, &disposition) != ERROR_SUCCESS)
+	break;
+      for (int i = 0; ;i++, m++)
+	{
+	  m->posix = (char *) malloc (MAX_PATH + 1);
+	  posix_path_size = MAX_PATH;
+	  /* FIXME: if maximum posix_path_size is 256, we're going to
+	     run into problems if we ever try to store a mount point that's
+	     over 256 but is under MAX_PATH. */
+	  res = RegEnumKeyEx (key, i, m->posix, &posix_path_size, NULL,
+			      NULL, NULL, NULL);
+
+	  if (res == ERROR_NO_MORE_ITEMS)
+	    {
+	      m = get_cygdrive (key, m, issystem);
+	      m->posix = NULL;
+	      break;
+	    }
+
+	  if (!*m->posix)
+	    goto no_go;
+	  else if (res != ERROR_SUCCESS)
+	    break;
+	  else
+	    {
+	      m->native = find2 (key, &m->flags, m->posix);
+	      m->issys = issystem;
+	      if (!m->native)
+		goto no_go;
+	    }
+	  continue;
+	no_go:
+	  free (m->posix);
+	  m->posix = NULL;
+	  m--;
+	}
+      RegCloseKey (key);
+    }
+}
+
+/* Return non-zero if PATH1 is a prefix of PATH2.
+   Both are assumed to be of the same path style and / vs \ usage.
+   Neither may be "".
+   LEN1 = strlen (PATH1).  It's passed because often it's already known.
+
+   Examples:
+   /foo/ is a prefix of /foo  <-- may seem odd, but desired
+   /foo is a prefix of /foo/
+   / is a prefix of /foo/bar
+   / is not a prefix of foo/bar
+   foo/ is a prefix foo/bar
+   /foo is not a prefix of /foobar
+*/
+
+static int
+path_prefix_p (const char *path1, const char *path2, int len1)
+{
+  /* Handle case where PATH1 has trailing '/' and when it doesn't.  */
+  if (len1 > 0 && SLASH_P (path1[len1 - 1]))
+    len1--;
+
+  if (len1 == 0)
+    return SLASH_P (path2[0]) && !SLASH_P (path2[1]);
+
+  if (strncasecmp (path1, path2, len1) != 0)
+    return 0;
+
+  return SLASH_P (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':';
+}
+
+static char *
+vconcat (const char *s, va_list v)
+{
+  int len;
+  char *rv, *arg;
+  va_list save_v = v;
+  int unc;
+
+  if (!s)
+    return 0;
+
+  len = strlen (s);
+
+  unc = SLASH_P (*s) && SLASH_P (s[1]);
+
+  while (1)
+    {
+      arg = va_arg (v, char *);
+      if (arg == 0)
+	break;
+      len += strlen (arg);
+    }
+  va_end (v);
+
+  rv = (char *) malloc (len + 1);
+  strcpy (rv, s);
+  v = save_v;
+  while (1)
+  {
+    arg = va_arg (v, char *);
+    if (arg == 0)
+      break;
+    strcat (rv, arg);
+  }
+  va_end (v);
+
+  char *d, *p;
+  for (p = rv; *p; p++)
+    if (*p == '\\')
+      *p = '/';
+
+  /* concat is only used for urls and files, so we can safely
+     canonicalize the results */
+  for (p = d = rv; *p; p++)
+    {
+      *d++ = *p;
+      /* special case for URLs */
+      if (*p == ':' && p[1] == '/' && p[2] == '/' && p > rv + 1)
+	{
+	  *d++ = *++p;
+	  *d++ = *++p;
+	}
+      else if (*p == '/' || *p == '\\')
+	{
+	  if (p == rv && unc)
+	    p++;
+	  while (p[1] == '/')
+	    p++;
+	}
+    }
+  *d = 0;
+
+  return rv;
+}
+
+static char *
+concat (const char *s, ...)
+{
+  va_list v;
+
+  va_start (v, s);
+
+  return vconcat (s, v);
+}
+
+char *
+cygpath (const char *s, ...)
+{
+  va_list v;
+  int max_len = -1;
+  struct mnt *m, *match = NULL;
+
+  va_start (v, s);
+  char *path = vconcat (s, v);
+  if (strncmp (path, "./", 2) == 0)
+    memmove (path, path + 2, strlen (path + 2) + 1);
+  if (strncmp (path, "/./", 3) == 0)
+    memmove (path + 1, path + 3, strlen (path + 3) + 1);
+
+  for (m = mount_table; m->posix ; m++)
+    {
+      int n = strlen (m->posix);
+      if (n < max_len || !path_prefix_p (m->posix, path, n))
+	continue;
+      max_len = n;
+      match = m;
+    }
+
+  char *native;
+  if (match == NULL)
+    native = strdup (path);
+  else if (max_len == (int) strlen (path))
+    native = strdup (match->native);
+  else
+    native = concat (match->native, "/", path + max_len, NULL);
+  free (path);
+
+  return native;
+}
+
+static mnt *m = NULL;
+
+extern "C" FILE *
+setmntent (const char *, const char *)
+{
+  m = mount_table;
+  if (!m->posix)
+    read_mounts ();
+  return NULL;
+}
+
+extern "C" struct mntent *
+getmntent (FILE *)
+{
+  static mntent mnt;
+  if (!m->posix)
+    return NULL;
+
+  mnt.mnt_fsname = (char *) m->native;
+  mnt.mnt_dir = (char *) m->posix;
+  if (!mnt.mnt_type)
+    mnt.mnt_type = (char *) malloc (1024);
+  if (!mnt.mnt_opts)
+    mnt.mnt_opts = (char *) malloc (1024);
+  if (!m->issys)
+    strcpy (mnt.mnt_type, (char *) "user");
+  else
+    strcpy (mnt.mnt_type, (char *) "system");
+  if (!(m->flags & MOUNT_BINARY))
+    strcpy (mnt.mnt_opts, (char *) "textmode");
+  else
+    strcpy (mnt.mnt_opts, (char *) "binmode");
+  if (m->flags & MOUNT_CYGWIN_EXEC)
+    strcat (mnt.mnt_opts, (char *) ",cygexec");
+  else if (m->flags & MOUNT_EXEC)
+    strcat (mnt.mnt_opts, (char *) ",exec");
+  if ((m->flags & MOUNT_AUTO))             /* cygdrive */
+    strcat (mnt.mnt_opts, (char *) ",noumount");
+  mnt.mnt_freq = 1;
+  mnt.mnt_passno = 1;
+  m++;
+  return &mnt;
+}