ulimit.def

android-w.song.android.widget

      /* `ulimit something' is same as `ulimit -f something' */
      cmdlist[ncmd++].arg = list ? list->word->word : (char *)NULL;
      if (list)
	list = list->next;
    }

  /* verify each command in the list. */
  for (c = 0; c < ncmd; c++)
    {
      limind = _findlim (cmdlist[c].cmd);
      if (limind == -1)
	{
	  builtin_error (_("`%c': bad command"), cmdlist[c].cmd);
	  return (EX_USAGE);
	}
    }

  for (c = 0; c < ncmd; c++)
    if (ulimit_internal (cmdlist[c].cmd, cmdlist[c].arg, mode, ncmd > 1) == EXECUTION_FAILURE)
      return (EXECUTION_FAILURE);

  return (EXECUTION_SUCCESS);
}

static int
ulimit_internal (cmd, cmdarg, mode, multiple)
     int cmd;
     char *cmdarg;
     int mode, multiple;
{
  int opt, limind, setting;
  int block_factor;
  RLIMTYPE soft_limit, hard_limit, real_limit, limit;

  setting = cmdarg != 0;
  limind = _findlim (cmd);
  if (mode == 0)
    mode = setting ? (LIMIT_HARD|LIMIT_SOFT) : LIMIT_SOFT;
  opt = get_limit (limind, &soft_limit, &hard_limit);
  if (opt < 0)
    {
      builtin_error (_("%s: cannot get limit: %s"), limits[limind].description,
						 strerror (errno));
      return (EXECUTION_FAILURE);
    }

  if (setting == 0)	/* print the value of the specified limit */
    {
      printone (limind, (mode & LIMIT_SOFT) ? soft_limit : hard_limit, multiple);
      return (EXECUTION_SUCCESS);
    }
 
  /* Setting the limit. */
  if (STREQ (cmdarg, "hard"))
    real_limit = hard_limit;
  else if (STREQ (cmdarg, "soft"))
    real_limit = soft_limit;
  else if (STREQ (cmdarg, "unlimited"))
    real_limit = RLIM_INFINITY;
  else if (all_digits (cmdarg))
    {
      limit = string_to_rlimtype (cmdarg);
      block_factor = BLOCKSIZE(limits[limind].block_factor);
      real_limit = limit * block_factor;

      if ((real_limit / block_factor) != limit)
	{
	  sh_erange (cmdarg, _("limit"));
	  return (EXECUTION_FAILURE);
	}
    }
  else
    {
      sh_invalidnum (cmdarg);
      return (EXECUTION_FAILURE);
    }

  if (set_limit (limind, real_limit, mode) < 0)
    {
      builtin_error (_("%s: cannot modify limit: %s"), limits[limind].description,
						    strerror (errno));
      return (EXECUTION_FAILURE);
    }

  return (EXECUTION_SUCCESS);
}

static int
get_limit (ind, softlim, hardlim)
     int ind;
     RLIMTYPE *softlim, *hardlim;
{
  RLIMTYPE value;
#if defined (HAVE_RESOURCE)
  struct rlimit limit;
#endif

  if (limits[ind].parameter >= 256)
    {
      switch (limits[ind].parameter)
	{
	case RLIMIT_FILESIZE:
	  if (filesize (&value) < 0)
	    return -1;
	  break;
	case RLIMIT_PIPESIZE:
	  if (pipesize (&value) < 0)
	    return -1;
	  break;
	case RLIMIT_OPENFILES:
	  value = (RLIMTYPE)getdtablesize ();
	  break;
	case RLIMIT_VIRTMEM:
	  return (getmaxvm (softlim, hardlim));
	case RLIMIT_MAXUPROC:
	  if (getmaxuprc (&value) < 0)
	    return -1;
	  break;
	default:
	  errno = EINVAL;
	  return -1;
	}
      *softlim = *hardlim = value;
      return (0);
    }
  else
    {
#if defined (HAVE_RESOURCE)
      if (getrlimit (limits[ind].parameter, &limit) < 0)
	return -1;
      *softlim = limit.rlim_cur;
      *hardlim = limit.rlim_max;
#  if defined (HPUX9)
      if (limits[ind].parameter == RLIMIT_FILESIZE)
	{
	  *softlim *= 512;
	  *hardlim *= 512;			/* Ugh. */
	}
      else
#  endif /* HPUX9 */
      return 0;
#else
      errno = EINVAL;
      return -1;
#endif
    }
}

static int
set_limit (ind, newlim, mode)
     int ind;
     RLIMTYPE newlim;
     int mode;
{
#if defined (HAVE_RESOURCE)
   struct rlimit limit;
   RLIMTYPE val;
#endif

  if (limits[ind].parameter >= 256)
    switch (limits[ind].parameter)
      {
      case RLIMIT_FILESIZE:
#if !defined (HAVE_RESOURCE)
	return (ulimit (2, newlim / 512L));
#else
	errno = EINVAL;
	return -1;
#endif

      case RLIMIT_OPENFILES:
#if defined (HAVE_SETDTABLESIZE)
#  if defined (__CYGWIN__)
	/* Grrr... Cygwin declares setdtablesize as void. */
	setdtablesize (newlim);
	return 0;
#  else
	return (setdtablesize (newlim));
#  endif
#endif
      case RLIMIT_PIPESIZE:
      case RLIMIT_VIRTMEM:
      case RLIMIT_MAXUPROC:
      default:
	errno = EINVAL;
	return -1;
      }
  else
    {
#if defined (HAVE_RESOURCE)
      if (getrlimit (limits[ind].parameter, &limit) < 0)
	return -1;
#  if defined (HPUX9)
      if (limits[ind].parameter == RLIMIT_FILESIZE)
	newlim /= 512;				/* Ugh. */
#  endif /* HPUX9 */
      val = (current_user.euid != 0 && newlim == RLIM_INFINITY &&
	       (mode & LIMIT_HARD) == 0 &&		/* XXX -- test */
	       (limit.rlim_cur <= limit.rlim_max))
		 ? limit.rlim_max : newlim;
      if (mode & LIMIT_SOFT)
	limit.rlim_cur = val;
      if (mode & LIMIT_HARD)
	limit.rlim_max = val;
	  
      return (setrlimit (limits[ind].parameter, &limit));
#else
      errno = EINVAL;
      return -1;
#endif
    }
}

static int
getmaxvm (softlim, hardlim)
     RLIMTYPE *softlim, *hardlim;
{
#if defined (HAVE_RESOURCE)
  struct rlimit datalim, stacklim;

  if (getrlimit (RLIMIT_DATA, &datalim) < 0)
    return -1;

  if (getrlimit (RLIMIT_STACK, &stacklim) < 0)
    return -1;

  /* Protect against overflow. */
  *softlim = (datalim.rlim_cur / 1024L) + (stacklim.rlim_cur / 1024L);
  *hardlim = (datalim.rlim_max / 1024L) + (stacklim.rlim_max / 1024L);
  return 0;
#else
  errno = EINVAL;
  return -1;
#endif /* HAVE_RESOURCE */
}

static int
filesize(valuep)
     RLIMTYPE *valuep;
{
#if !defined (HAVE_RESOURCE)
  long result;
  if ((result = ulimit (1, 0L)) < 0)
    return -1;
  else
    *valuep = (RLIMTYPE) result * 512;
  return 0;
#else
  errno = EINVAL;
  return -1;
#endif
}

static int
pipesize (valuep)
     RLIMTYPE *valuep;
{
#if defined (PIPE_BUF)
  /* This is defined on Posix systems. */
  *valuep = (RLIMTYPE) PIPE_BUF;
  return 0;
#else
#  if defined (_POSIX_PIPE_BUF)
  *valuep = (RLIMTYPE) _POSIX_PIPE_BUF;
  return 0;
#  else
#    if defined (PIPESIZE)
  /* This is defined by running a program from the Makefile. */
  *valuep = (RLIMTYPE) PIPESIZE;
  return 0;
#    else
  errno = EINVAL;
  return -1;  
#    endif /* PIPESIZE */
#  endif /* _POSIX_PIPE_BUF */
#endif /* PIPE_BUF */
}

static int
getmaxuprc (valuep)
     RLIMTYPE *valuep;
{
  long maxchild;

  maxchild = getmaxchild ();
  if (maxchild < 0)
    {
      errno = EINVAL;
      return -1;
    }
  else
    {
      *valuep = (RLIMTYPE) maxchild;
      return 0;
    }
}

static void
print_all_limits (mode)
     int mode;
{
  register int i;
  RLIMTYPE softlim, hardlim;

  if (mode == 0)
    mode |= LIMIT_SOFT;

  for (i = 0; limits[i].option > 0; i++)
    {
      if (get_limit (i, &softlim, &hardlim) == 0)
	printone (i, (mode & LIMIT_SOFT) ? softlim : hardlim, 1);
      else if (errno != EINVAL)
	builtin_error ("%s: cannot get limit: %s", limits[i].description,
						   strerror (errno));
    }
}

static void
printone (limind, curlim, pdesc)
     int limind;
     RLIMTYPE curlim;
     int pdesc;
{
  char unitstr[64];
  int factor;

  factor = BLOCKSIZE(limits[limind].block_factor);
  if (pdesc)
    {
      if (limits[limind].units)
	sprintf (unitstr, "(%s, -%c) ", limits[limind].units, limits[limind].option);
      else
        sprintf (unitstr, "(-%c) ", limits[limind].option);

      printf ("%-20s %16s", limits[limind].description, unitstr);
    }
  if (curlim == RLIM_INFINITY)
    puts ("unlimited");
  else if (curlim == RLIM_SAVED_MAX)
    puts ("hard");
  else if (curlim == RLIM_SAVED_CUR)
    puts ("soft");
  else
    print_rlimtype ((curlim / factor), 1);
}

/* Set all limits to NEWLIM.  NEWLIM currently must be RLIM_INFINITY, which
   causes all limits to be set as high as possible depending on mode (like
   csh `unlimit').  Returns -1 if NEWLIM is invalid, 0 if all limits
   were set successfully, and 1 if at least one limit could not be set.

   To raise all soft limits to their corresponding hard limits, use
	ulimit -S -a unlimited
   To attempt to raise all hard limits to infinity (superuser-only), use
	ulimit -H -a unlimited
   To attempt to raise all soft and hard limits to infinity, use
	ulimit -a unlimited
*/

static int
set_all_limits (mode, newlim)
     int mode;
     RLIMTYPE newlim;
{
  register int i;
  int retval = 0;

  if (newlim != RLIM_INFINITY)
    {
      errno = EINVAL;
      return -1;
    }
  
  if (mode == 0)
    mode = LIMIT_SOFT|LIMIT_HARD;

  for (retval = i = 0; limits[i].option > 0; i++)
    if (set_limit (i, newlim, mode) < 0)
      {
	builtin_error (_("%s: cannot modify limit: %s"), limits[i].description,
						      strerror (errno));
	retval = 1;
      }
  return retval;
}

#endif /* !_MINIX */