/*
|
* Copyright (c) 1999-2018 The strace developers.
|
* All rights reserved.
|
*
|
* Redistribution and use in source and binary forms, with or without
|
* modification, are permitted provided that the following conditions
|
* are met:
|
* 1. Redistributions of source code must retain the above copyright
|
* notice, this list of conditions and the following disclaimer.
|
* 2. Redistributions in binary form must reproduce the above copyright
|
* notice, this list of conditions and the following disclaimer in the
|
* documentation and/or other materials provided with the distribution.
|
* 3. The name of the author may not be used to endorse or promote products
|
* derived from this software without specific prior written permission.
|
*
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
# include "config.h"
|
#endif
|
|
#include <errno.h>
|
#include <stdarg.h>
|
#include <string.h>
|
#include <stdio.h>
|
#include <stdlib.h>
|
|
#include "error_prints.h"
|
|
#ifndef HAVE_PROGRAM_INVOCATION_NAME
|
extern char *program_invocation_name;
|
#endif
|
|
static void
|
verror_msg(int err_no, const char *fmt, va_list p)
|
{
|
char *msg;
|
|
fflush(NULL);
|
|
/* We want to print entire message with single fprintf to ensure
|
* message integrity if stderr is shared with other programs.
|
* Thus we use vasprintf + single fprintf.
|
*/
|
msg = NULL;
|
if (vasprintf(&msg, fmt, p) >= 0) {
|
if (err_no)
|
fprintf(stderr, "%s: %s: %s\n",
|
program_invocation_name, msg, strerror(err_no));
|
else
|
fprintf(stderr, "%s: %s\n",
|
program_invocation_name, msg);
|
free(msg);
|
} else {
|
/* malloc in vasprintf failed, try it without malloc */
|
fprintf(stderr, "%s: ", program_invocation_name);
|
vfprintf(stderr, fmt, p);
|
if (err_no)
|
fprintf(stderr, ": %s\n", strerror(err_no));
|
else
|
putc('\n', stderr);
|
}
|
/* We don't switch stderr to buffered, thus fprintf(stderr)
|
* always flushes its output and this is not necessary: */
|
/* fflush(stderr); */
|
}
|
|
void
|
error_msg(const char *fmt, ...)
|
{
|
va_list p;
|
va_start(p, fmt);
|
verror_msg(0, fmt, p);
|
va_end(p);
|
}
|
|
void
|
error_msg_and_die(const char *fmt, ...)
|
{
|
va_list p;
|
va_start(p, fmt);
|
verror_msg(0, fmt, p);
|
va_end(p);
|
die();
|
}
|
|
void
|
error_msg_and_help(const char *fmt, ...)
|
{
|
if (fmt != NULL) {
|
va_list p;
|
va_start(p, fmt);
|
verror_msg(0, fmt, p);
|
va_end(p);
|
}
|
fprintf(stderr, "Try '%s -h' for more information.\n",
|
program_invocation_name);
|
die();
|
}
|
|
void
|
perror_msg(const char *fmt, ...)
|
{
|
va_list p;
|
va_start(p, fmt);
|
verror_msg(errno, fmt, p);
|
va_end(p);
|
}
|
|
void
|
perror_msg_and_die(const char *fmt, ...)
|
{
|
va_list p;
|
va_start(p, fmt);
|
verror_msg(errno, fmt, p);
|
va_end(p);
|
die();
|
}
|
