mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-11 09:50:12 +00:00
79 lines
2.1 KiB
Groff
79 lines
2.1 KiB
Groff
.\" Copyright (c) 1988 Massachusetts Institute of Technology,
|
|
.\" Student Information Processing Board. All rights reserved.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd November 22, 1988
|
|
.Os
|
|
.Dt COMPILE_ET 1
|
|
.Sh NAME
|
|
.Nm compile_et
|
|
.Nd error table compiler
|
|
.Sh SYNOPSIS
|
|
.Nm compile_et
|
|
.Ar file
|
|
.Sh DESCRIPTION
|
|
.Nm Compile_et
|
|
converts a table listing error-code names and associated messages into
|
|
a C source file suitable for use with the
|
|
.Xr com_err 3
|
|
library.
|
|
.Pp
|
|
The source file name must end with a suffix of ``.et''; the file
|
|
consists of a declaration supplying the name (up to four characters
|
|
long) of the error-code table:
|
|
|
|
.Em error_table name
|
|
|
|
followed by up to 256 entries of the form:
|
|
|
|
.Em error_code name ,
|
|
"
|
|
.Em string
|
|
"
|
|
|
|
and a final
|
|
|
|
.Em end
|
|
|
|
to indicate the end of the table.
|
|
.Pp
|
|
The name of the table is used to construct the name of a subroutine
|
|
.Em initialize_XXXX_error_table
|
|
which must be called in order for the
|
|
.Xr com_err 3
|
|
library to recognize the error table.
|
|
.Pp
|
|
The various error codes defined are assigned sequentially increasing
|
|
numbers (starting with a large number computed as a hash function of
|
|
the name of the table); thus for compatibility it is suggested that
|
|
new codes be added only to the end of an existing table, and that no
|
|
codes be removed from tables.
|
|
.Pp
|
|
The names defined in the table are placed into a C header file with
|
|
preprocessor directives defining them as integer constants of up to
|
|
32 bits in magnitude.
|
|
.Pp
|
|
A C source file is also generated which should be compiled and linked
|
|
with the object files which reference these error codes; it contains
|
|
the text of the messages and the initialization subroutine. Both C
|
|
files have names derived from that of the original source file, with
|
|
the ``.et'' suffix replaced by ``.c'' and ``.h''.
|
|
.Pp
|
|
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.
|
|
.Sh BUGS
|
|
Since
|
|
.Nm compile_et
|
|
uses a very simple parser based on
|
|
.Xr yacc 1 ,
|
|
its error recovery leaves much to be desired.
|
|
.Sh "SEE ALSO"
|
|
.Xr yacc 1 ,
|
|
.Xr com_err 3
|
|
.Pp
|
|
.Rs
|
|
.%A Ken Raeburn
|
|
.%T "A Common Error Description Library for UNIX"
|
|
.Re
|