Converts UNIX style file specifications to OpenVMS file
    specifications.

    Format

      #include  <unixlib.h>

      int decc$to_vms  (const char *unix_style_filespec,
                       int (*action_routine)
                       (char *OpenVMS_style_filespec, int type_of_file),
                       int allow_wild, int no_directory);

1 - Arguments

 unix_style_filespec

    The address of a null-terminated string containing a name in UNIX
    style file specification format.

 action_routine

    The address of a routine called by decc$to_vms that accepts the
    following arguments:

    o  A pointer to a null-terminated string that is the result of
       the translation to OpenVMS format.

    o  An integer that has one of the following values:

       Value               Translation

       0 (DECC$K_FOREIGN)  A file on a remote system that is not
                           running the OpenVMS or VAXELN operating
                           system.
       1 (DECC$K_FILE)     The translation is a file.
       2 (DECC$K_          The OpenVMS translation of the UNIX style
       DIRECTORY)          filename is a directory.

       These values can be defined symbolically with the symbols
       DECC$K_FOREIGN, DECC$K_FILE, and DECC$K_DIRECTORY. See the
       example for more information.

    If action_routine returns a nonzero value (TRUE), file
    translation continues. If it returns a 0 value (FALSE), no
    further file translation takes place.

 allow_wild

    Either 0 or 1, passed by value. If a 0 is specified, wildcards
    found in unix_style_filespec are not expanded. Otherwise,
    wildcards are expanded and each one is passed to action_routine.
    Only expanded filenames that correspond to existing OpenVMS files
    are included.

 no_directory

    An integer that has one of the following values:

    Value            Translation

    0                Directory allowed.
    1                Prevent expansion of the string as a directory
                     name.
    2                Forced to be a directory name.

2 - Description

    The decc$to_vms function converts the given UNIX style file
    specification into the equivalent OpenVMS file specification
    (in all uppercase letters). It allows you to specify UNIX style
    wildcards, which are translated into a list of corresponding
    OpenVMS files.

    Note that the following feature logicals can affect the behavior
    of decc$to_vms:

       DECC$DISABLE_TO_VMS_LOGNAME_TRANSLATION
       DECC$NO_ROOTED_SEARCH_LISTS

3 - Return Value

    x                  The number of filenames that result from the
                       specified UNIX style file specification.

4 - Example

        /* Translate "UNIX" wildcard file names to OpenVMS names.*/
        /* Define as a foreign command and provide the name as   */
        /* an argument.                                          */

        #include <unixlib.h>
        #include <stdio.h>
        int print_name(char *, int);
        int main(int argc, char *argv[])
        {
            int number_found;           /* number of files found */

            printf("Translating: %s\n", argv[1]);

            number_found = decc$to_vms(argv[1], print_name, 1, 0);
            printf("%d files found\n", number_found);
        }

        /* action routine that prints name and type on each line */

        int print_name(char *name, int type)
        {
            if (type == DECC$K_DIRECTORY)
                printf("directory: %s\n", name);
            else if (type == DECC$K_FOREIGN)
                printf("remote non-VMS: %s\n", name);
            else
                printf("file:        %s\n", name);

        /* Translation continues as long as success status is returned */
            return (1);
        }

      This example shows how to use the decc$to_vms routine in
      Compaq C. It takes a UNIX style file specification argument
      and displays, in OpenVMS file specification format, the name of
      each existing file that matches it.