/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Function: Some nice error routines taken from:
* "Advanced Programming in the UNIX Environment",
* by W.Richard Stevens
*
* void erl_err_sys(const char *fmt, ... ) fatal, sys-error
* void erl_err_ret(const char *fmt, ... ) non-fatal, sys-error
* void erl_err_quit(const char *fmt, ...) fatal, non-sys-error
* void erl_err_msg(const char *fmt, ... ) non-fatal, non-sys-error
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#ifdef VRTX /* What's VRIX? [sverkerw] */
#define __READY_EXTENSIONS__
#endif
#include <errno.h>
#if defined(VXWORKS)
#include <taskLib.h>
#include <taskVarLib.h>
#endif
#include "eidef.h"
#include "erl_interface.h"
#include "erl_error.h"
/* Forward */
static void err_doit(int, const char*, va_list);
/* __attribute__ ((format (printf, 2, 0)))*/
/*
* Some thoughts on flushing stdout/stderr:
*
* The defaults are reasonable (linebuffered stdout, unbuffered
* stderr). If they are in effect (the user neither knows nor cares),
* there's no need to flush.
*
* If the user changes these defaults (and knows what he's doing, so
* he knows and cares) we shouldn't surprise him by
* second-guessing. So there's a need to not flush.
*
* If the user doesn't know what he's doing, he's hosed anyway.
*/
/* Fatal error related to a system call.
* Print a message and terminate.
*/
void erl_err_sys(const char *fmt, ... )
{
va_list ap;
va_start(ap, fmt);
err_doit(1, fmt, ap);
va_end(ap);
exit(1);
} /* erl_err_sys */
/* Nonfatal error related to a system call.
* Print a message and return
*/
void erl_err_ret(const char *fmt, ... )
{
va_list ap;
va_start(ap, fmt);
err_doit(1, fmt, ap);
va_end(ap);
return;
} /* erl_err_ret */
/* Nonfatal error unrelated to a system call.
* Print a message and return
*/
void erl_err_msg(const char *fmt, ... )
{
va_list ap;
va_start(ap, fmt);
err_doit(0, fmt, ap);
va_end(ap);
return;
} /* erl_err_msg */
/* Fatal error unrelated to a system call.
* Print a message and terminate
*/
void erl_err_quit(const char *fmt, ... )
{
va_list ap;
va_start(ap, fmt);
err_doit(0, fmt, ap);
va_end(ap);
exit(1);
} /* erl_err_quit */
/*
* For example on SunOS we don't have the ANSI C strerror.
*
* maybe move to a convenince lib [sverkerw]
*/
#ifndef HAVE_STRERROR
/* FIXME: move to configure */
/* CONFIG: probe for sys_nerr/_sys_nerr */
extern int sys_nerr;
/* CONFIG: probe for sys_errlist/_sys_errlist and maybe for const-ness */
#ifdef FREEBSD
extern const char * const sys_errlist[];
#else
extern char * sys_errlist[];
#endif
/* Should be in string.h */
/* Is supposed to return 'char *' (no const-ness in ANSI's prototype),
but if you rewrite the returned string in place you deserve to
lose. */
static const char *strerror(int errnum)
{
if (errnum >= 0 && errnum < sys_nerr) {
return sys_errlist[errnum];
} else {
/* Enough buffer for 64 bits of error. It should last a while. */
/* FIXME problem for threaded ? */
static char b[] = "(error -9223372036854775808)";
sprintf(b, "(error %d)", errnum);
buf[sizeof(b)-1] = '\0';
return b;
}
}
#endif /* !HAVE_STRERROR */
/* Print a message and return to caller.
* Caller specifies "errnoflag".
*/
static void err_doit(int errnoflag, const char *fmt, va_list ap)
{
#ifndef NO_ERR_MSG
int errno_save;
errno_save = errno;
vfprintf(stderr, fmt, ap);
if (errnoflag)
{
fputs(": ", stderr);
fputs(strerror(errno_save), stderr);
}
fputs("\n", stderr);
#endif
return;
} /* err_doit */
