mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-04 09:09:56 +00:00
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* closeout.c - close standard output
|
|
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
|
|
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. */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#if ENABLE_NLS
|
|
# include <libintl.h>
|
|
# define _(Text) gettext (Text)
|
|
#else
|
|
# define _(Text) Text
|
|
#endif
|
|
|
|
#if HAVE_STDLIB_H
|
|
# include <stdlib.h>
|
|
#endif
|
|
#ifndef EXIT_FAILURE
|
|
# define EXIT_FAILURE 1
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <errno.h>
|
|
#ifndef errno
|
|
extern int errno;
|
|
#endif
|
|
|
|
#include "closeout.h"
|
|
#include "error.h"
|
|
#include "quotearg.h"
|
|
#if 0
|
|
#include "__fpending.h"
|
|
#endif
|
|
|
|
static int default_exit_status = EXIT_FAILURE;
|
|
static const char *file_name;
|
|
|
|
/* Set the value to be used for the exit status when close_stdout is called.
|
|
This is useful when it is not convenient to call close_stdout_status,
|
|
e.g., when close_stdout is called via atexit. */
|
|
void
|
|
close_stdout_set_status (int status)
|
|
{
|
|
default_exit_status = status;
|
|
}
|
|
|
|
/* Set the file name to be reported in the event an error is detected
|
|
by close_stdout_status. */
|
|
void
|
|
close_stdout_set_file_name (const char *file)
|
|
{
|
|
file_name = file;
|
|
}
|
|
|
|
/* Close standard output, exiting with status STATUS on failure.
|
|
If a program writes *anything* to stdout, that program should `fflush'
|
|
stdout and make sure that it succeeds before exiting. Otherwise,
|
|
suppose that you go to the extreme of checking the return status
|
|
of every function that does an explicit write to stdout. The last
|
|
printf can succeed in writing to the internal stream buffer, and yet
|
|
the fclose(stdout) could still fail (due e.g., to a disk full error)
|
|
when it tries to write out that buffered data. Thus, you would be
|
|
left with an incomplete output file and the offending program would
|
|
exit successfully.
|
|
|
|
FIXME: note the fflush suggested above is implicit in the fclose
|
|
we actually do below. Consider doing only the fflush and/or using
|
|
setvbuf to inhibit buffering.
|
|
|
|
Besides, it's wasteful to check the return value from every call
|
|
that writes to stdout -- just let the internal stream state record
|
|
the failure. That's what the ferror test is checking below.
|
|
|
|
It's important to detect such failures and exit nonzero because many
|
|
tools (most notably `make' and other build-management systems) depend
|
|
on being able to detect failure in other tools via their exit status. */
|
|
|
|
void
|
|
close_stdout_status (int status)
|
|
{
|
|
int e = ferror (stdout) ? 0 : -1;
|
|
|
|
#if 0
|
|
if (__fpending (stdout) == 0)
|
|
return;
|
|
#endif
|
|
|
|
if (fclose (stdout) != 0)
|
|
e = errno;
|
|
|
|
if (0 < e)
|
|
{
|
|
char const *write_error = _("write error");
|
|
if (file_name)
|
|
error (status, e, "%s: %s", quotearg_colon (file_name), write_error);
|
|
else
|
|
error (status, e, "%s", write_error);
|
|
}
|
|
}
|
|
|
|
/* Close standard output, exiting with status EXIT_FAILURE on failure. */
|
|
void
|
|
close_stdout (void)
|
|
{
|
|
close_stdout_status (default_exit_status);
|
|
}
|