[patch] mv symlink functionality

[Dmitry Bogatov]

Hello! Some time before I proposed idea for mv to leave symlink
behind. It received neither approval nor disappoval, so here is patch.

Words are wind, so code should attract more attention ;)


--
Best regards,
        Dmitry Bogatov <kact...@gnu.org>, GNU Thales maintainer.
GPG: D1E0591E0037BDCCBEE56002788BE01254B7F00D
Please, use GPG encryption, signing and format plain text letters
in accordance with RFC1855, section 2.1.1.


diff --git a/src/mv.c b/src/mv.c
index 5b08fdd..ff47e13 100644
--- a/src/mv.c
+++ b/src/mv.c
@@ -61,6 +61,7 @@ static struct option const long_options[] =
   {"no-target-directory", no_argument, NULL, 'T'},
   {"strip-trailing-slashes", no_argument, NULL, STRIP_TRAILING_SLASHES_OPTION},
   {"suffix", required_argument, NULL, 'S'},
+  {"symbolic-trail", no_argument, NULL, 's'},
   {"target-directory", required_argument, NULL, 't'},
   {"update", no_argument, NULL, 'u'},
   {"verbose", no_argument, NULL, 'v'},
@@ -236,6 +237,9 @@ do_move (const char *source, const char *dest, const struct 
cp_options *x)
         }
     }

+  if (x->symbolic_link)
+    ok &= !!symlink(dest, source);
+
   return ok;
 }

@@ -301,6 +305,7 @@ Mandatory arguments to long options are mandatory for short 
options too.\n\
 \n\
   -b                           like --backup but does not accept an argument\n\
   -f, --force                  do not prompt before overwriting\n\
+  -s, --symbolic-trace         leave a symbolic link to new file location.\n\
   -i, --interactive            prompt before overwrite\n\
   -n, --no-clobber             do not overwrite an existing file\n\
 If you specify more than one of -i, -f, -n, only the final one takes effect.\n\
@@ -369,7 +374,7 @@ main (int argc, char **argv)
      we'll actually use backup_suffix_string.  */
   backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");

-  while ((c = getopt_long (argc, argv, "bfint:uvS:T", long_options, NULL))
+  while ((c = getopt_long (argc, argv, "bfint:uvsS:T", long_options, NULL))
          != -1)
     {
       switch (c)
@@ -405,6 +410,9 @@ main (int argc, char **argv)
             }
           target_directory = optarg;
           break;
+        case 's':
+          x.symbolic_link = true;
+          break;
         case 'T':
           no_target_directory = true;
           break;

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