RTEMS and unix directory

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

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


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/*
 *  $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;
}