| 1 | //===-- Linux implementation of kill --------------------------------------===// |
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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/signal/kill.h" |
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| 10 | |
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| 11 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
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| 12 | #include "src/__support/common.h" |
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| 13 | #include "src/__support/libc_errno.h" |
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| 14 | #include "src/__support/macros/config.h" |
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| 15 | #include "src/signal/linux/signal_utils.h" |
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| 16 | |
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| 17 | #include <signal.h> |
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| 18 | #include <sys/syscall.h> // For syscall numbers. |
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| 19 | |
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| 20 | namespace LIBC_NAMESPACE_DECL { |
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| 21 | |
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| 22 | LLVM_LIBC_FUNCTION(int, kill, (pid_t pid, int sig)) { |
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| 23 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_kill, pid, sig); |
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| 24 | |
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| 25 | // A negative return value indicates an error with the magnitude of the |
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| 26 | // value being the error code. |
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| 27 | if (ret != 0) { |
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| 28 | libc_errno = (ret > 0 ? ret : -ret); |
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| 29 | return -1; |
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| 30 | } |
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| 31 | |
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| 32 | return ret; // always 0 |
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| 33 | } |
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| 34 | |
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| 35 | } // namespace LIBC_NAMESPACE_DECL |
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| 36 | |
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