eec1dbe6ce
- document that sysctl() and sysctlbyname() return 0 on success - if the provided buffer is too small, set errno to ENOMEM and return -1 instead of returning ENOMEM.
183 lines
4.5 KiB
C
183 lines
4.5 KiB
C
/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)sysctl.c 8.2 (Berkeley) 1/4/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <errno.h>
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#include <limits.h>
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#include <paths.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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int
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sysctl(name, namelen, oldp, oldlenp, newp, newlen)
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int *name;
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u_int namelen;
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void *oldp, *newp;
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size_t *oldlenp, newlen;
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{
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if (name[0] != CTL_USER)
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return (__sysctl(name, namelen, oldp, oldlenp, newp, newlen));
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if (newp != NULL) {
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errno = EPERM;
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return (-1);
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}
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if (namelen != 2) {
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errno = EINVAL;
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return (-1);
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}
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switch (name[1]) {
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case USER_CS_PATH:
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if (oldp && *oldlenp < sizeof(_PATH_STDPATH)) {
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errno = ENOMEM;
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return -1;
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}
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*oldlenp = sizeof(_PATH_STDPATH);
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if (oldp != NULL)
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memmove(oldp, _PATH_STDPATH, sizeof(_PATH_STDPATH));
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return (0);
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}
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if (oldp && *oldlenp < sizeof(int)) {
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errno = ENOMEM;
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return (-1);
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}
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*oldlenp = sizeof(int);
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if (oldp == NULL)
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return (0);
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switch (name[1]) {
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case USER_BC_BASE_MAX:
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*(int *)oldp = BC_BASE_MAX;
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return (0);
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case USER_BC_DIM_MAX:
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*(int *)oldp = BC_DIM_MAX;
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return (0);
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case USER_BC_SCALE_MAX:
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*(int *)oldp = BC_SCALE_MAX;
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return (0);
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case USER_BC_STRING_MAX:
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*(int *)oldp = BC_STRING_MAX;
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return (0);
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case USER_COLL_WEIGHTS_MAX:
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*(int *)oldp = COLL_WEIGHTS_MAX;
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return (0);
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case USER_EXPR_NEST_MAX:
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*(int *)oldp = EXPR_NEST_MAX;
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return (0);
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case USER_LINE_MAX:
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*(int *)oldp = LINE_MAX;
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return (0);
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case USER_RE_DUP_MAX:
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*(int *)oldp = RE_DUP_MAX;
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return (0);
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case USER_POSIX2_VERSION:
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*(int *)oldp = _POSIX2_VERSION;
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return (0);
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case USER_POSIX2_C_BIND:
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#ifdef POSIX2_C_BIND
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_C_DEV:
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#ifdef POSIX2_C_DEV
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_CHAR_TERM:
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#ifdef POSIX2_CHAR_TERM
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_FORT_DEV:
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#ifdef POSIX2_FORT_DEV
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_FORT_RUN:
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#ifdef POSIX2_FORT_RUN
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_LOCALEDEF:
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#ifdef POSIX2_LOCALEDEF
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_SW_DEV:
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#ifdef POSIX2_SW_DEV
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_POSIX2_UPE:
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#ifdef POSIX2_UPE
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*(int *)oldp = 1;
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#else
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*(int *)oldp = 0;
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#endif
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return (0);
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case USER_STREAM_MAX:
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*(int *)oldp = FOPEN_MAX;
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return (0);
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case USER_TZNAME_MAX:
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*(int *)oldp = NAME_MAX;
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return (0);
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default:
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errno = EINVAL;
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return (-1);
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}
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/* NOTREACHED */
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}
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