1 //===-- Linux implementation of getrandom ---------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/sys/random/getrandom.h" 10 11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 12 #include "src/__support/common.h" 13 14 #include "src/errno/libc_errno.h" 15 #include <sys/syscall.h> // For syscall numbers. 16 17 namespace __llvm_libc { 18 19 LLVM_LIBC_FUNCTION(ssize_t, getrandom, 20 (void *buf, size_t buflen, unsigned int flags)) { 21 long ret = __llvm_libc::syscall_impl(SYS_getrandom, buf, buflen, flags); 22 if (ret < 0) { 23 libc_errno = -ret; 24 return -1; 25 } 26 return 0; 27 } 28 29 } // namespace __llvm_libc 30