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sortix--sortix/libc/unistd/sysconf.cpp
2014-09-25 18:20:00 +02:00

46 lines
1.5 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
unistd/sysconf.cpp
Get configuration information at runtime.
*******************************************************************************/
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
extern "C" long sysconf(int name)
{
switch ( name )
{
case _SC_CLK_TCK: return 1000;
case _SC_PAGESIZE: case _SC_PAGE_SIZE:
return getpagesize();
case _SC_OPEN_MAX: return 0x10000;
case _SC_RTSIG_MAX: return (SIGRTMAX+1) - SIGRTMIN;
case _SC_GETGR_R_SIZE_MAX: return -1;
case _SC_GETPW_R_SIZE_MAX: return -1;
default:
fprintf(stderr, "%s:%u warning: %s(%i) is unsupported\n",
__FILE__, __LINE__, __func__, name);
return errno = EINVAL, -1;
}
}