basestr.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2010, 2011 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <mailutils/types.h>
#include <mailutils/errno.h>
#include <mailutils/log.h>
#include <mailutils/stream.h>
#include <mailutils/stdstream.h>
#include <mailutils/util.h>
mu_stream_t mu_strin;
mu_stream_t mu_strout;
mu_stream_t mu_strerr;
static void
stdstream_flushall (void *data MU_ARG_UNUSED)
{
mu_stream_flush (mu_strin);
mu_stream_flush (mu_strout);
mu_stream_flush (mu_strerr);
}
static int stdstream_flushall_setup = 0;
void
mu_stdstream_setup (int flags)
{
int rc;
int fd;
int yes = 1;
/* If the streams are already open, close them */
if (flags & MU_STDSTREAM_RESET_STRIN)
mu_stream_destroy (&mu_strin);
if (flags & MU_STDSTREAM_RESET_STROUT)
mu_stream_destroy (&mu_strout);
if (flags & MU_STDSTREAM_RESET_STRERR)
mu_stream_destroy (&mu_strerr);
/* Ensure that first 3 descriptors are open in proper mode */
fd = open ("/dev/null", O_RDWR);
switch (fd)
{
case 0:
/* Keep it and try to open 1 */
fd = open ("/dev/null", O_WRONLY);
if (fd != 1)
{
if (fd > 2)
close (fd);
break;
}
case 1:
/* keep it open and try 2 */
fd = open ("/dev/null", O_WRONLY);
if (fd != 2)
close (fd);
break;
case 2:
/* keep it open */;
break;
default:
close (fd);
break;
}
/* Create the corresponding streams */
if (!mu_strin)
{
rc = mu_stdio_stream_create (&mu_strin, MU_STDIN_FD, 0);
if (rc)
{
fprintf (stderr, "mu_stdio_stream_create(%d): %s\n",
MU_STDIN_FD, mu_strerror (rc));
abort ();
}
mu_stream_ioctl (mu_strin, MU_IOCTL_FD, MU_IOCTL_FD_SET_BORROW, &yes);
}
if (!mu_strout)
{
rc = mu_stdio_stream_create (&mu_strout, MU_STDOUT_FD, 0);
if (rc)
{
fprintf (stderr, "mu_stdio_stream_create(%d): %s\n",
MU_STDOUT_FD, mu_strerror (rc));
abort ();
}
mu_stream_ioctl (mu_strout, MU_IOCTL_FD, MU_IOCTL_FD_SET_BORROW, &yes);
}
if (!mu_strerr)
{
if (mu_stdstream_strerr_create (&mu_strerr, MU_STRERR_STDERR, 0, 0,
mu_program_name, NULL))
abort ();
}
if (!stdstream_flushall_setup)
{
mu_onexit (stdstream_flushall, NULL);
stdstream_flushall_setup = 1;
}
}
int
mu_printf (const char *fmt, ...)
{
int rc;
va_list ap;
va_start (ap, fmt);
rc = mu_stream_vprintf (mu_strout, fmt, ap);
va_end (ap);
return rc;
}