compile_et(1) - NetBSD Manual Pages

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COMPILE_ET(1)           NetBSD General Commands Manual           COMPILE_ET(1)


NAME

     compile_et -- error table compiler


SYNOPSIS

     compile_et [--version] [--help] file


DESCRIPTION

     The compile_et utility reads the table describing error-code names and
     their associated messages in the file file and generates a C source file
     suitable for use with the com_err(3) library.  The source file file must
     end with a suffix of ``.et'' and compile_et writes a C header file file.h
     which contains definitions of the numerical values of the error codes
     defined in the error table and a C source file file.c which should be
     compiled and linked with the executable.

     The source file is a plain ASCII text file.  A ``#'' in the source file
     is treated as a comment character, and all remaining text to the end of
     the source line will be ignored.  The source file consists of the follow-
     ing declarations:

           id [base] string
                   Defines an identification string (such a a version string)
                   which is recorded in the generated files.  It is mandatory
                   and must be the first declaration in the source file.

           et name
                   Specifies the name of the error table to be name.  It is
                   mandatory and must be declared after the id declaration and
                   before all other declarations.  The name of table is lim-
                   ited to four ASCII characters.  The optional argument base
                   specifies the base value of error codes the table.

                   The name of the table is used to construct the name of a
                   function initialize_<name>_error_table() which must be
                   called to register the error table the the com_err(3)
                   library.  A re-entrant (thread-safe) version called
                   initialize_<name>_error_table_r() is also defined.

           prefix [string]
                   Defines a prefix to be applied to all error code names.  If
                   no string is specified, the prefix is not defined.  It is
                   an optional declaration and can appear more than once.

           index val
                   Specifies the index val in the error table for the follow-
                   ing error code declaration.  Subsequent error codes are
                   allocated sequentially from the same value.  It is an
                   optional declaration and can appear more than once.

           ec cname, msg
                   Defines an error code with the name cname and its associ-
                   ated error message msg.  The error codes are assigned
                   sequentially increasing numbers.  The name is placed into
                   the C header file as an enumerated type.

           end     Indicates the end of the error table.

     To maintain compatibility, new codes should be added to the end of an
     existing table, and codes should not be removed from tables.


EXAMPLES

     A short sample error table might be test_err.et:

             # example error table source file
             id      "\$Id\$"
             et      test
             prefix  TEST
             ec      PERM,           "Operation not permitted"
             ec      IO,             "I/O error"
             ec      NOMEM,          "Out of memory"
             ec      INVAL,          "Invalid argument"
             end

     Compiling the source file test_err.et with compile_et will create a C
     header file test_err.h containing the enumerated type test_error_number
     with values TEST_PERM, TEST_IO, TEST_NOMEM and TEST_INVAL, and a C source
     file test_err.c containing the com_err(3) initialisation function
     initialize_test_error_table().


SEE ALSO

     com_err(3)

NetBSD 5.0.2                   November 9, 2001                   NetBSD 5.0.2