| 1 | //===-- Linux implementation of sysconf -----------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/unistd/sysconf.h" |
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| 10 | |
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| 11 | #include "src/__support/common.h" |
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| 12 | |
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| 13 | #include "hdr/unistd_macros.h" |
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| 14 | #include "src/__support/libc_errno.h" |
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| 15 | #include "src/__support/macros/config.h" |
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| 16 | #include "src/sys/auxv/getauxval.h" |
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| 17 | #include <sys/auxv.h> |
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| 18 | |
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| 19 | namespace LIBC_NAMESPACE_DECL { |
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| 20 | |
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| 21 | LLVM_LIBC_FUNCTION(long, sysconf, (int name)) { |
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| 22 | long ret = 0; |
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| 23 | if (name == _SC_PAGESIZE) |
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| 24 | return static_cast<long>(getauxval(AT_PAGESZ)); |
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| 25 | |
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| 26 | // TODO: Complete the rest of the sysconf options. |
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| 27 | if (ret < 0) { |
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| 28 | libc_errno = EINVAL; |
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| 29 | return -1; |
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| 30 | } |
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| 31 | return ret; |
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| 32 | } |
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| 33 | |
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| 34 | } // namespace LIBC_NAMESPACE_DECL |
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| 35 | |
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