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RTEMS and unix directory
- From: Joel Sherrill <joel dot sherrill at oarcorp dot com>
- To: "newlib at sources dot redhat dot com" <newlib at sources dot redhat dot com>
- Date: Wed, 12 Nov 2008 09:55:24 -0600
- Subject: RTEMS and unix directory
Hi,
After examining how RTEMS could use the posix
subdirectory, I moved onto the unix subdirectory.
I am pretty sure can use the following with no work:
+ basename.c
+ dirname.c
+ getcwd.c
+ pread.c
+ pwrite.c
We could use the password and group access
routines IF we can all figure out a way to
let the rtems configuration call our
routine that provides a dummy /etc/passwd
and /etc/group if there was not one in the
filesystem. This could be a weak symbol
or ifdef'ed on RTEMS.
Our ttyname.c appears to have originated with
the one in this directory but has been slightly
modified to have ttyname_r. So our version
could go in here and be used. I have attached
it for review.
Is the configure/build infrastructure able to
turn on just the pieces listed above and ttyname.c
if you are OK with our version?
How about the group/password?
--
Joel Sherrill, Ph.D. Director of Research & Development
joel.sherrill@OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985
/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
/*
* $Id: ttyname.c,v 1.10 2008/11/07 16:56:40 joel Exp $
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <termios.h>
#include <unistd.h>
#include <string.h>
#include <paths.h>
#include <_syslist.h>
#include <errno.h>
#include <rtems/libio_.h>
#include <rtems/seterr.h>
static char ttyname_buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
/*
* ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
*/
int ttyname_r(
int fd,
char *name,
size_t namesize
)
{
struct stat sb;
struct termios tty;
struct dirent *dirp;
DIR *dp;
struct stat dsb;
char *rval;
/* Must be a terminal. */
if (tcgetattr (fd, &tty) < 0)
rtems_set_errno_and_return_minus_one(EBADF);
/* Must be a character device. */
if (fstat (fd, &sb) || !S_ISCHR (sb.st_mode))
rtems_set_errno_and_return_minus_one(EBADF);
if ((dp = opendir (_PATH_DEV)) == NULL)
rtems_set_errno_and_return_minus_one(EBADF);
for (rval = NULL; (dirp = readdir (dp)) != NULL ;)
{
if (dirp->d_ino != sb.st_ino)
continue;
strcpy (name + sizeof (_PATH_DEV) - 1, dirp->d_name);
if (stat (name, &dsb) || sb.st_dev != dsb.st_dev ||
sb.st_ino != dsb.st_ino)
continue;
rval = name;
break;
}
(void) closedir (dp);
return 0;
}
/*
* ttyname() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
*/
char *ttyname(
int fd
)
{
if ( !ttyname_r( fd, ttyname_buf, sizeof(ttyname_buf) ) )
return ttyname_buf;
return NULL;
}