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sortix--sortix/kernel/kernelinfo.cpp
2016-01-26 17:45:06 +01:00

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2015.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix 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 General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
kernelinfo.cpp
Lets user-space query information about the kernel.
*******************************************************************************/
#include <brand.h>
#include <errno.h>
#include <sortix/kernel/copy.h>
#include <sortix/kernel/kernel.h>
#include <sortix/kernel/syscall.h>
#ifndef VERSIONSTR
#define VERSIONSTR "unknown"
#endif
namespace Sortix {
static const char* KernelInfo(const char* req)
{
if ( strcmp(req, "name") == 0 ) { return BRAND_KERNEL_NAME; }
if ( strcmp(req, "version") == 0 ) { return VERSIONSTR; }
if ( strcmp(req, "builddate") == 0 ) { return __DATE__; }
if ( strcmp(req, "buildtime") == 0 ) { return __TIME__; }
#if defined(__i386__) || defined(__x86_64__)
if ( strcmp(req, "firmware") == 0 ) { return "bios"; }
#else
#warning "Name your system firmware here"
#endif
return NULL;
}
ssize_t sys_kernelinfo(const char* req, char* resp, size_t resplen)
{
const char* str = KernelInfo(req);
if ( !str )
return errno = EINVAL, -1;
size_t stringlen = strlen(str);
if ( resplen < stringlen + 1 )
return errno = ERANGE, (ssize_t) stringlen;
if ( !CopyToUser(resp, str, sizeof(char) * (stringlen + 1)) )
return -1;
return 0;
}
} // namespace Sortix