Author: eugen
Date: Sat Oct 27 16:41:34 2018
New Revision: 339816
URL: https://svnweb.freebsd.org/changeset/base/339816

Log:
  mount_msdosfs: do not fail mounts requiring locale name conversion table
  that is already present in a kernel statically.
  
  For example, the command "mount_msdosfs -L ru_RU.KOI8-R" fails with error
  "mount_msdosfs: msdosfs_iconv: File exists" for a kernel having
  options LIBICONV and MSDOSFS_ICONV. After this change, it mounts successfully.
  
  MFC after:            1 month
  Differential Revision:        https://reviews.freebsd.org/D16951

Modified:
  head/sbin/mount_msdosfs/mount_msdosfs.c

Modified: head/sbin/mount_msdosfs/mount_msdosfs.c
==============================================================================
--- head/sbin/mount_msdosfs/mount_msdosfs.c     Sat Oct 27 16:14:42 2018        
(r339815)
+++ head/sbin/mount_msdosfs/mount_msdosfs.c     Sat Oct 27 16:41:34 2018        
(r339816)
@@ -46,6 +46,7 @@ static const char rcsid[] =
 
 #include <ctype.h>
 #include <err.h>
+#include <errno.h>
 #include <grp.h>
 #include <locale.h>
 #include <pwd.h>
@@ -308,17 +309,17 @@ set_charset(struct iovec **iov, int *iovlen, const cha
 
        build_iovec_argf(iov, iovlen, "cs_win", ENCODING_UNICODE);
        error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local);
-       if (error)
+       if (error && errno != EEXIST)
                return (-1);
        if (cs_dos != NULL) {
                error = kiconv_add_xlat16_cspairs(cs_dos, cs_local);
-               if (error)
+               if (error && errno != EEXIST)
                        return (-1);
        } else {
                build_iovec_argf(iov, iovlen, "cs_dos", cs_local);
                error = kiconv_add_xlat16_cspair(cs_local, cs_local,
                                KICONV_FROM_UPPER | KICONV_LOWER);
-               if (error)
+               if (error && errno != EEXIST)
                        return (-1);
        }
 
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