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-rw-r--r--OS/os.c-FreeBSD47
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diff --git a/OS/os.c-FreeBSD b/OS/os.c-FreeBSD
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+++ b/OS/os.c-FreeBSD
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+/*************************************************
+* Exim - an Internet mail transport agent *
+*************************************************/
+
+/* Copyright (c) Jeremy Harris 1995 - 2020 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+/* FreeBSD-specific code. This is concatenated onto the generic
+src/os.c file. */
+
+
+/*************
+Sendfile shim
+*************/
+
+ssize_t
+os_sendfile(int out, int in, off_t * offp, size_t cnt)
+{
+off_t loff = *offp, written;
+
+if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1;
+*offp = loff + written;
+return (ssize_t)written;
+}
+
+/*************************************************
+TCP Fast Open: check that the ioctl is accepted
+*************************************************/
+
+#ifndef COMPILE_UTILITY
+void
+tfo_probe(void)
+{
+# ifdef TCP_FASTOPEN
+int sock;
+
+if ( (sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0
+ && setsockopt(sock, IPPROTO_TCP, TCP_FASTOPEN, &on, sizeof(on) >= 0)
+ )
+ f.tcp_fastopen_ok = TRUE;
+close(sock);
+# endif
+}
+#endif
+
+
+/* End of os.c-Linux */