Line data    Source code

       1             : /*
       2             :  * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions
       8             :  * are met:
       9             :  *
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  *
      13             :  * 2. Redistributions in binary form must reproduce the above copyright
      14             :  *    notice, this list of conditions and the following disclaimer in the
      15             :  *    documentation and/or other materials provided with the distribution.
      16             :  *
      17             :  * 3. Neither the name of the Institute nor the names of its contributors
      18             :  *    may be used to endorse or promote products derived from this software
      19             :  *    without specific prior written permission.
      20             :  *
      21             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31             :  * SUCH DAMAGE.
      32             :  */
      33             : 
      34             : #include <config.h>
      35             : 
      36             : #include "roken.h"
      37             : 
      38             : #ifdef HAVE_SYS_TYPES_H
      39             : #include <sys/types.h>
      40             : #endif
      41             : #ifdef TIME_WITH_SYS_TIME
      42             : #include <sys/time.h>
      43             : #include <time.h>
      44             : #elif defined(HAVE_SYS_TIME_H)
      45             : #include <sys/time.h>
      46             : #else
      47             : #include <time.h>
      48             : #endif
      49             : #ifdef HAVE_SYS_PARAM_H
      50             : #include <sys/param.h>
      51             : #endif
      52             : #ifdef HAVE_UNISTD_H
      53             : #include <unistd.h>
      54             : #endif
      55             : 
      56             : #ifdef HAVE_SYS_RESOURCE_H
      57             : #include <sys/resource.h>
      58             : #endif
      59             : 
      60             : #ifdef HAVE_SYS_SYSCTL_H
      61             : #include <sys/sysctl.h>
      62             : #endif
      63             : 
      64             : ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
      65           0 : getdtablesize(void)
      66             : {
      67           0 :   int files = -1;
      68             : #if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
      69           0 :   files = sysconf(_SC_OPEN_MAX);
      70             : #else /* !defined(HAVE_SYSCONF) */
      71             : #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
      72             :   struct rlimit res;
      73             :   if (getrlimit(RLIMIT_NOFILE, &res) == 0)
      74             :     files = res.rlim_cur;
      75             : #else /* !definded(HAVE_GETRLIMIT) */
      76             : #if defined(HAVE_SYSCTL) && defined(CTL_KERN) && defined(KERN_MAXFILES)
      77             :   int mib[2];
      78             :   size_t len;
      79             : 
      80             :   mib[0] = CTL_KERN;
      81             :   mib[1] = KERN_MAXFILES;
      82             :   len = sizeof(files);
      83             :   sysctl(&mib, 2, &files, sizeof(files), NULL, 0);
      84             : #endif /* defined(HAVE_SYSCTL) */
      85             : #endif /* !definded(HAVE_GETRLIMIT) */
      86             : #endif /* !defined(HAVE_SYSCONF) */
      87             : 
      88             : #ifdef OPEN_MAX
      89             :   if (files < 0)
      90             :     files = OPEN_MAX;
      91             : #endif
      92             : 
      93             : #ifdef NOFILE
      94           0 :   if (files < 0)
      95           0 :     files = NOFILE;
      96             : #endif
      97             : 
      98           0 :   return files;
      99             : }