DtDtsDataToDataType(library call)										 DtDtsDataToDataType(library call)

NAME

       DtDtsDataToDataType -- get the data type for a set of data

SYNOPSIS

       #include <Dt/Dts.h>
       char *DtDtsDataToDataType(
       const char *filepath,
       const void *buffer,
       const int size,
       const struct stat *stat_buff,
       const char *link_path,
       const struct stat *link_stat_buff,
       const char *opt_name);

DESCRIPTION

       The  DtDtsDataToDataType  function determines the data type of a set of data, based on the information given in the non- NULL pointer argu-
       ments to the function.  The function gathers any additional information, if it is needed, to compensate for the NULL arguments.	For  exam-
       ple,  if  the  filepath argument is given, but the stat_buff argument is NULL and a stat_buff value is required to determine the data type,
       DtDtsDataToDataType calls the stat(2) function to obtain the information.

       The filepath argument is the pathname of a file.

       The buffer argument is a pointer to the buffer of the data to be typed.

       The size argument is the size of the buffer in bytes.

       The stat_buff argument is the buffer returned from a stat(2) or fstat(3) call for use in typing.

       The link_path argument is the pathname of the target file pointed to by a symbolic link.

       The link_stat_buff argument is the buffer returned from an lstat(2) call for use in typing.

       The opt_name argument can be used to specify a name to be associated with the buffer.  If the opt_name argument is not NULL, it is used	as
       a  pseudo  file	name  in typing; otherwise, certain attributes may be returned as NULL because the filename components could not be deter-
       mined.

RETURN VALUE

       Upon successful completion, the DtDtsDataToDataType function returns a pointer to a data type string, or NULL if no value could	be  deter-
       mined.

APPLICATION USAGE

       The  DtDtsDataToDataType  function  is  generally  used by applications such as file managers to improve performance.  Typical applications
       should probably use DtDtsFileToDataType(3) or DtDtsBufferToDataType(3) instead.

       The DtDtsBuffer* functions assume that the buffer is readable and writable by the user, group and other file  classes  and  select  a  type
       accordingly.   An application requiring a type based on read-only permissions should use DtDtsDataToDataType with a stat_buff value created
       for this purpose: all fields should NULL except for the st_mode field, which should be set to:

       S_IFREG | S_IROTH | S_IRGRP | S_IRUSR

SEE ALSO

       Dt/Dts.h, DtDtsLoadDataTypes(3), DtDtsFileToDataType(3), DtDtsBufferToDataType(3), fstat(3), lstat(2), stat(2).

														 DtDtsDataToDataType(library call)