X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/80a47a2c9633437d4ceebd214cd44abfbd4f4543..ee549a2ed04164407f4f897be3bf545f32579c5c:/src/OS/os.h-Linux?ds=sidebyside diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux index c9f417be5..dcd9ec02d 100644 --- a/src/OS/os.h-Linux +++ b/src/OS/os.h-Linux @@ -1,21 +1,35 @@ -/* $Cambridge: exim/src/OS/os.h-Linux,v 1.8 2009/06/10 07:34:04 tom Exp $ */ - /* Exim: OS-specific C header file for Linux */ +/* Copyright (c) The Exim Maintainers 2021 - 2024 */ +/* Copyright (c) University of Cambridge 1995 - 2020 */ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* See the file NOTICE for conditions of use and distribution. */ + + +/* Some old systems we've received bug-reports for have a which +does not pull in . Best to just pull it in now and have done +with the issue. */ + +#include +#include + #define CRYPT_H #define GLIBC_IP_OPTIONS #define HAVE_MMAP #define HAVE_BSD_GETLOADAVG #define HAVE_SYS_STATVFS_H +#define HAVE_GETIFADDRS #define NO_IP_VAR_H #define SIG_IGN_WORKS -/* When using the DKIM, setting HAVE_LINUX_SENDFILE can increase +/* When using DKIM, setting OS_SENDFILE can increase performance on outgoing mail a bit. Note: With older glibc versions this setting will conflict with the _FILE_OFFSET_BITS=64 setting -defined as part of the Linux CFLAGS. */ +defined as part of the Linux CFLAGS. As of 2017 those are declared +to be too old to build by default. */ -/* #define HAVE_LINUX_SENDFILE */ +#define OS_SENDFILE +extern ssize_t os_sendfile(int, int, off_t *, size_t); #define F_FREESP O_TRUNC typedef struct flock flock_t; @@ -24,8 +38,8 @@ typedef struct flock flock_t; #define OS_STRSIGNAL #if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__) -#define SIOCGIFCONF_GIVES_ADDR -#define HAVE_SYS_MOUNT_H +# define SIOCGIFCONF_GIVES_ADDR +# define HAVE_SYS_MOUNT_H #endif #if defined(__linux__) @@ -39,9 +53,6 @@ storage" as quickly as Exim thinks they are. */ #define NEED_SYNC_DIRECTORY -/* Other OS have "const" in here */ -#define ICONV_ARG2_TYPE char ** - #define os_find_running_interfaces os_find_running_interfaces_linux /* Need a prototype for the Linux-specific function. The structure hasn't @@ -52,4 +63,45 @@ extern struct ip_address_item *os_find_running_interfaces_linux(void); #endif /* __linux__ */ +/* Some folks running "unusual" setups with very old libc environments have +found that _GNU_SOURCE=1 before is not sufficient to define some +constants needed for 64-bit arithmetic. If you encounter build errors based +on LLONG_MIN being undefined and various other escape hatches have not helped, +then change the 0 to 1 in the next block. */ + +#if 0 +# define LLONG_MIN LONG_LONG_MIN +# define LLONG_MAX LONG_LONG_MAX +#endif + +#if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOURCE +# define EXIM_HAVE_OPENAT +# define EXIM_HAVE_FUTIMENS +#endif + +/* TCP Fast Open support */ + +#include /* for TCP_FASTOPEN */ +#include /* for MSG_FASTOPEN */ +#if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN) +# define MSG_FASTOPEN 0x20000000 +#endif +#define EXIM_HAVE_TCPI_UNACKED +#ifndef TCPI_OPT_SYN_DATA +# define TCPI_OPT_SYN_DATA 32 +#endif + +/* "Abstract" Unix-socket names */ +#define EXIM_HAVE_ABSTRACT_UNIX_SOCKETS + +/* inotify(7) etc syscalls */ +#define EXIM_HAVE_INOTIFY + +/* Needed for uClibc */ +#ifndef NS_MAXMSG +# define NS_MAXMSG 65535 +#endif + +#define EXIM_HAVE_STRCHRNUL + /* End */