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support/support_socket_so_timestamp_time64.c
48 строк
2 KB
Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Return whether socket supports 64-bit timestamps. Copyright (C) 2022-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <errno.h> #include <unistd.h> #include <sys/syscall.h> #include <sys/socket.h> #include <support/support.h> #ifdef __linux__ # include <socket-constants-time64.h> #endif bool support_socket_so_timestamp_time64 (int fd) { #ifdef __linux__ # if __LINUX_KERNEL_VERSION >= 0x050100 \ || __WORDSIZE == 64 \ || (defined __SYSCALL_WORDSIZE && __SYSCALL_WORDSIZE == 64) return true; # else int level = SOL_SOCKET; int optname = COMPAT_SO_TIMESTAMP_NEW; int optval; socklen_t len = sizeof (optval); int r = syscall (__NR_getsockopt, fd, level, optname, &optval, &len); return r != -1; # endif #else return false; #endif }