Re: configure breakage under Interix

[Jim Meyering]

Sam Johnston <address@hidden> wrote:

> Evening all,
>
> I'm having some trouble getting coreutils running under Interix
> (Microsoft's POSIX subsystem aka Services for Unix which is to be
> included in Windows 2003 Server R2, Vista, etc.). First I tell it
> about the new release (5.2 instead of 3.x or 4.x):
...
> Then I tell it to continue even if it can't work out what file systems
> are mounted:
>
> coreutils-5.93$ diff configure.orig configure
> 31364c31364,31365
> <    { (exit 1); exit 1; }; }
> ---
>> #   { (exit 1); exit 1; }; }
>> }

You might have better luck with the following patch.
It's based on work that is awaiting copyright assignment.

Since there is currently no code to define MOUNTED_INTERIX,
you can just add

#define MOUNTED_INTERIX 1

somewhere near the top of that file.  or compile mountlist.o
with AM_CFLAGS=-DMOUNTED_INTERIX.

Index: mountlist.c
===================================================================
RCS file: /fetish/cu/lib/mountlist.c,v
retrieving revision 1.55
diff -u -p -r1.55 mountlist.c
--- mountlist.c 22 Sep 2005 06:05:39 -0000      1.55
+++ mountlist.c 8 Nov 2005 14:24:28 -0000
@@ -35,7 +35,9 @@ char *strstr ();
 
 #include <errno.h>
 
-#include <fcntl.h>
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
 
 #include <unistd.h>
 
@@ -91,6 +93,11 @@ char *strstr ();
 # include <dirent.h>
 #endif
 
+#ifdef MOUNTED_INTERIX         /* Windows with Interix / Microsoft Services 
For UNIX */
+# include <dirent.h>
+# include <sys/statvfs.h>
+#endif
+
 #ifdef MOUNTED_FREAD           /* SVR2.  */
 # include <mnttab.h>
 #endif
@@ -417,6 +424,95 @@ read_file_system_list (bool need_fs_type
   }
 #endif /* MOUNTED_GETMNT. */
 
+#if defined MOUNTED_INTERIX
+  /* Windows with Interix / Microsoft Services For UNIX */
+  {
+    /* Unlike Cygwin which attempts to implement as many of the UNIX
+       API's as possible Interix implements a great deal and then depends
+       on developers to port the rest. On Interix, the POSIX implementation
+       prefers to deny that UNIX style file systems exist and therefore
+       does not implement the mount tables for the system.
+
+       This implementation simply scans the mounted file system directory
+       and then reads the statvfs data for each entry to construct the
+       mount list.
+
+       The implementation also chooses to use the reentrant implementation
+       of readdir_r in order to favor a threading friendly system. */
+
+    int statvfs_errno = 0;
+    int fail;
+
+    DIR *dirp = opendir ("/dev/fs");
+    if (dirp == NULL)
+      {
+       fail = 1;
+      }
+    else
+      {
+       char file_name[9 + NAME_MAX]; /* 8 for /dev/fs/ + 1 for NUL */
+       int saved_errno;
+
+       while (1)
+         {
+           struct statvfs stat_buf;
+           struct dirent entry;
+           struct dirent *result;
+
+           fail = readdir_r (dirp, &entry, &result);
+
+           if (fail || result == NULL)
+             break;
+
+           strcpy (file_name, "/dev/fs/");
+           strcat (file_name, entry.d_name);
+
+           fail = statvfs (file_name, &stat_buf);
+           if (fail == 0)
+             {
+               char const *Magic_mount_from_name
+                 = "/Device/LanmanRedirector/;",
+               me = xmalloc (sizeof *me);
+               me->me_devname = xstrdup (stat_buf.f_mntfromname);
+               me->me_mountdir = xstrdup (stat_buf.f_mntonname);
+               me->me_type = xstrdup (stat_buf.f_fstypename);
+               me->me_type_malloced = 1;
+               me->me_dummy = 0;
+               me->me_dev = stat_buf.f_fsid;
+               me->me_remote
+                 = strncmp (stat_buf.f_mntfromname, Magic_mount_from_name,
+                            strlen (Magic_mount_from_name)) == 0;
+
+               /* Add to the linked list. */
+               *mtail = me;
+               mtail = &me->me_next;
+             }
+           else
+             {
+               statvfs_errno = errno;
+             }
+         }
+
+       saved_errno = errno;
+       closedir (dirp);
+       errno = saved_errno;
+      }
+
+    if (!fail && statvfs_errno)
+      {
+       /* In the unlikely event that opendir and each readdir
+          succeed, but all statvfs calls fail, ensure that we
+          fail with a valid errno value.  */
+       fail = 1;
+       errno = statvfs_errno;
+      }
+
+    if (fail)
+      goto free_then_fail;
+
+  }
+#endif
+
 #if defined MOUNTED_FS_STAT_DEV /* BeOS */
   {
     /* The next_dev() and fs_stat_dev() system calls give the list of