67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*
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* Copyright (c) 2012, 2015, 2022, 2023 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* kernelinfo.cpp
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* Lets user-space query information about the kernel.
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*/
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#include <brand.h>
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#include <errno.h>
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#include <sortix/kernel/copy.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/syscall.h>
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#include "kernelinfo.h"
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#ifndef VERSIONSTR
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#define VERSIONSTR "unknown"
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#endif
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namespace Sortix {
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char* kernel_options;
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const char* kernel_firmware;
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static const char* KernelInfo(const char* req)
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{
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if ( strcmp(req, "name") == 0 ) return BRAND_KERNEL_NAME;
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if ( strcmp(req, "version") == 0 ) return VERSIONSTR;
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if ( strcmp(req, "tagline") == 0 ) return BRAND_RELEASE_TAGLINE;
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if ( strcmp(req, "options") == 0 ) return kernel_options;
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if ( strcmp(req, "builddate") == 0 ) return __DATE__;
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if ( strcmp(req, "buildtime") == 0 ) return __TIME__;
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if ( strcmp(req, "firmware") == 0 ) return kernel_firmware;
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return NULL;
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}
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ssize_t sys_kernelinfo(const char* user_req, char* user_resp, size_t resplen)
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{
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char* req = GetStringFromUser(user_req);
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if ( !req )
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return -1;
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const char* str = KernelInfo(req);
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delete[] req;
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if ( !str )
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return errno = EINVAL, -1;
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size_t stringlen = strlen(str);
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if ( resplen < stringlen + 1 )
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return errno = ERANGE, (ssize_t) stringlen;
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if ( !CopyToUser(user_resp, str, sizeof(char) * (stringlen + 1)) )
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return -1;
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return 0;
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}
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} // namespace Sortix
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