+++ /dev/null
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Sean Eric Fagan of Cygnus Support.
- *
- * 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.
- */
-
-
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-
-#include <errno.h>
-#include <unistd.h>
-
-/*
- * sysconf --
- * get configurable system variables.
- *
- * XXX
- * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
- * not change during the lifetime of the calling process. This would seem
- * to require that any change to system limits kill all running processes.
- * A workaround might be to cache the values when they are first retrieved
- * and then simply return the cached value on subsequent calls. This is
- * less useful than returning up-to-date values, however.
- */
-long
-sysconf(name)
- int name;
-{
- struct clockinfo clk;
- struct rlimit rl;
- size_t len;
- int mib[2], value;
-
- len = sizeof(value);
-
- switch (name) {
-/* 1003.1 */
- case _SC_ARG_MAX:
- mib[0] = CTL_KERN;
- mib[1] = KERN_ARGMAX;
- break;
- case _SC_CHILD_MAX:
- return (getrlimit(RLIMIT_NPROC, &rl) ? -1 : rl.rlim_cur);
- case _SC_CLK_TCK:
- return (CLK_TCK);
- case _SC_JOB_CONTROL:
- mib[0] = CTL_KERN;
- mib[1] = KERN_JOB_CONTROL;
- goto yesno;
- case _SC_NGROUPS_MAX:
- mib[0] = CTL_KERN;
- mib[1] = KERN_NGROUPS;
- break;
- case _SC_OPEN_MAX:
- return (getrlimit(RLIMIT_NOFILE, &rl) ? -1 : rl.rlim_cur);
- case _SC_STREAM_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_STREAM_MAX;
- break;
- case _SC_TZNAME_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_TZNAME_MAX;
- break;
- case _SC_SAVED_IDS:
- mib[0] = CTL_KERN;
- mib[1] = KERN_SAVED_IDS;
- goto yesno;
- case _SC_VERSION:
- mib[0] = CTL_KERN;
- mib[1] = KERN_POSIX1;
- break;
-
-/* 1003.2 */
- case _SC_BC_BASE_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_BC_BASE_MAX;
- break;
- case _SC_BC_DIM_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_BC_DIM_MAX;
- break;
- case _SC_BC_SCALE_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_BC_SCALE_MAX;
- break;
- case _SC_BC_STRING_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_BC_STRING_MAX;
- break;
- case _SC_COLL_WEIGHTS_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_COLL_WEIGHTS_MAX;
- break;
- case _SC_EXPR_NEST_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_EXPR_NEST_MAX;
- break;
- case _SC_LINE_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_LINE_MAX;
- break;
- case _SC_RE_DUP_MAX:
- mib[0] = CTL_USER;
- mib[1] = USER_RE_DUP_MAX;
- break;
- case _SC_2_VERSION:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_VERSION;
- break;
- case _SC_2_C_BIND:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_C_BIND;
- goto yesno;
- case _SC_2_C_DEV:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_C_DEV;
- goto yesno;
- case _SC_2_CHAR_TERM:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_CHAR_TERM;
- goto yesno;
- case _SC_2_FORT_DEV:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_FORT_DEV;
- goto yesno;
- case _SC_2_FORT_RUN:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_FORT_RUN;
- goto yesno;
- case _SC_2_LOCALEDEF:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_LOCALEDEF;
- goto yesno;
- case _SC_2_SW_DEV:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_SW_DEV;
- goto yesno;
- case _SC_2_UPE:
- mib[0] = CTL_USER;
- mib[1] = USER_POSIX2_UPE;
-yesno: if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
- return (-1);
- if (value == 0)
- return (-1);
- return (value);
- break;
- default:
- errno = EINVAL;
- return (-1);
- }
- return (sysctl(mib, 2, &value, &len, NULL, 0) == -1 ? -1 : value);
-}
projects / apple / libc.git / blobdiff