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/* $Id: err.C,v 1.22 2001/08/22 20:30:24 dm Exp $ */
/*
*
* Copyright (C) 1998 David Mazieres (dm@uun.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#include "err.h"
#undef warn
#undef warnx
#undef vwarn
#undef vwarnx
#undef fatal
#undef panic
bssstr progname;
str progdir;
void (*fatalhook) ();
int errfd = 2;
bool fatal_no_destruct;
void (*_err_output) (suio *uio, int flags) = _err_output_sync;
void (*_err_reset_hook) ();
/* Newer versions of dmalloc changed dmalloc_logpath to
* _dmalloc_logpath. */
#if 1
#define dmalloc_logpath _dmalloc_logpath
extern "C" char *dmalloc_logpath;
#endif
void
setprogname (char *argv0)
{
char *cp;
if ((cp = strrchr (argv0, '/')))
cp++;
else
cp = argv0;
/* Libtool shell wrappers leave lt- in argv[0] */
if (cp[0] == 'l' && cp[1] == 't' && cp[2] == '-')
progname = cp + 3;
else
progname = cp;
if (cp > argv0)
progdir.setbuf (argv0, cp - argv0);
else
progdir = NULL;
#ifdef DMALLOC
if (dmalloc_logpath) {
str logname;
const char *p;
if (!(p = strrchr (dmalloc_logpath, '/')) || !(p = strrchr (p, '.')))
p = dmalloc_logpath + strlen (dmalloc_logpath);
logname = strbuf ("%.*s.%s", p - dmalloc_logpath, dmalloc_logpath,
progname.cstr ());
static char *lp;
if (lp)
xfree (lp);
lp = xstrdup (logname);
dmalloc_logpath = lp;
}
#endif /* DMALLOC */
}
void
err_reset ()
{
if (_err_reset_hook)
(*_err_reset_hook) ();
_err_reset_hook = NULL;
_err_output = _err_output_sync;
}
void
_err_output_sync (suio *uio, int flags)
{
int saved_errno = errno;
uio->output (errfd);
if (flags & warnobj::panicflag)
abort ();
if (flags & warnobj::fatalflag) {
if (fatalhook)
(*fatalhook) ();
if (fatal_no_destruct)
_exit (1);
exit (1);
}
errno = saved_errno;
}
/*
* warnobj
*/
warnobj::warnobj (int f)
: flags (f)
{
if (!(flags & xflag) && progname)
cat (progname).cat (": ");
if (flags & panicflag)
cat ("PANIC: ");
else if (flags & fatalflag)
cat ("fatal: ");
}
const warnobj &
warnobj::operator() (const char *fmt, ...) const
{
va_list ap;
va_start (ap, fmt);
vfmt (fmt, ap);
va_end (ap);
return *this;
}
warnobj::~warnobj ()
{
_err_output (uio, flags);
}
#ifndef fatalobj
fatalobj::~fatalobj ()
{
/* Of course, gcc won't let this function return, so we have to jump
* through a few hoops rather than simply implement ~fatalobj as
* {}. */
static_cast<warnobj *> (this)->~warnobj ();
abort ();
}
#endif /* !fatalobj */
/*
* Traditional functions
*/
void
vwarn (const char *fmt, va_list ap)
{
suio uio;
if (progname)
uio.print (progname.cstr (), progname.len ());
suio_vuprintf (&uio, fmt, ap);
_err_output (&uio, 0);
}
void
vwarnx (const char *fmt, va_list ap)
{
suio uio;
suio_vuprintf (&uio, fmt, ap);
_err_output (&uio, warnobj::xflag);
}
void
warn (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
vwarn (fmt, ap);
va_end (ap);
}
void
warnx (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
vwarnx (fmt, ap);
va_end (ap);
}
void
fatal (const char *fmt, ...)
{
va_list ap;
strbuf b;
if (progname)
b << progname << ": ";
b << "fatal: ";
va_start (ap, fmt);
b.vfmt (fmt, ap);
va_end (ap);
_err_output (b.tosuio (), warnobj::fatalflag);
exit (1);
}
void
panic (const char *fmt, ...)
{
va_list ap;
strbuf b;
if (progname)
b << progname << ": ";
b << "PANIC: " << __BACKTRACE__ << "\n";
va_start (ap, fmt);
b.vfmt (fmt, ap);
va_end (ap);
_err_output (b.tosuio (), warnobj::panicflag);
abort ();
}
GLOBALDESTRUCT;
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