/* * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. */ #include <config.h> #include "roken.h" #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif #ifdef TIME_WITH_SYS_TIME #include <sys/time.h> #include <time.h> #elif defined(HAVE_SYS_TIME_H) #include <sys/time.h> #else #include <time.h> #endif #ifdef HAVE_SYS_PARAM_H #include <sys/param.h> #endif #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #ifdef HAVE_SYS_RESOURCE_H #include <sys/resource.h> #endif #ifdef HAVE_SYS_SYSCTL_H #include <sys/sysctl.h> #endif ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL getdtablesize(void) { int files = -1; #if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX) files = sysconf(_SC_OPEN_MAX); #else /* !defined(HAVE_SYSCONF) */ #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) struct rlimit res; if (getrlimit(RLIMIT_NOFILE, &res) == 0) files = res.rlim_cur; #else /* !definded(HAVE_GETRLIMIT) */ #if defined(HAVE_SYSCTL) && defined(CTL_KERN) && defined(KERN_MAXFILES) int mib[2]; size_t len; mib[0] = CTL_KERN; mib[1] = KERN_MAXFILES; len = sizeof(files); sysctl(&mib, 2, &files, sizeof(files), NULL, 0); #endif /* defined(HAVE_SYSCTL) */ #endif /* !definded(HAVE_GETRLIMIT) */ #endif /* !defined(HAVE_SYSCONF) */ #ifdef OPEN_MAX if (files < 0) files = OPEN_MAX; #endif #ifdef NOFILE if (files < 0) files = NOFILE; #endif return files; }