Title:        et
Version:      1
Submitted:    May 7 1990
Author:       "Jonathan I. Kamens" <jik@pit-manager.mit.edu>
Submittor:    "Jonathan I. Kamens" <jik@pit-manager.mit.edu>
Description:  Error table compiler and library

[  This was originally bundled into the Delete package, but I split it out
   because I think it should be available more easily.  It's used in lots of
   Athena software.

   The introduction below comes from the manpage. The file texinfo.tex was
   split into two parts for posting.  --r$  ]

This is an error-table library.

    #include <com_err.h>
    void com_err (whoami, code, format, ...);
            const char *whoami;
            long code;
            const char *format;
    proc = set_com_err_hook (proc);
    void (* proc) (const char *, long, const char *, va_list);
    proc = reset_com_err_hook ();
    void initialize_XXXX_error_table ();

Com_err displays an error message on the standard error stream stderr
composed of the whoami string, which should specify the program name or
some subportion of a program, followed by an error message generated from
the code value (derived from compile_et, and a string produced using the
format string and any following arguments, in the same style as fprintf.

The behavior of com_err can be modified using set_com_err_hook; this
defines a procedure which is called with the arguments passed to com_err,
instead of the default internal procedure which sends the formatted text
to error output.  Thus the error messages from a program can all easily be
diverted to another form of diagnostic logging, such as syslog (3).
Reset_com_err_hook may be used to restore the behavior of com_err to its
default form.  Both procedures return the previous ``hook'' value.  These
``hook'' procedures must have the declaration given for proc above in the
synopsis.