X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/61ec970df30325dbcd8c9d0f0e431dc793126656..294f47fdbcbf5534a266d9abfcd1ccb873aff891:/src/OS/os.h-Linux diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux index f89ea7adb..63cf9babd 100644 --- a/src/OS/os.h-Linux +++ b/src/OS/os.h-Linux @@ -1,15 +1,46 @@ -/* $Cambridge: exim/src/OS/os.h-Linux,v 1.1 2004/10/06 15:07:39 ph10 Exp $ */ - /* Exim: OS-specific C header file for Linux */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ +/* 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_SYS_VFS_H +#define HAVE_BSD_GETLOADAVG +#define HAVE_SYS_STATVFS_H #define NO_IP_VAR_H -#define SIOCGIFCONF_GIVES_ADDR #define SIG_IGN_WORKS +/* 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. As of 2017 those are declared +to be too old to build by default. */ + +#define OS_SENDFILE +extern ssize_t os_sendfile(int, int, off_t *, size_t); + +#define F_FREESP O_TRUNC +typedef struct flock flock_t; + +#define os_strsignal strsignal +#define OS_STRSIGNAL + +#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__) +# define SIOCGIFCONF_GIVES_ADDR +# define HAVE_SYS_MOUNT_H +#endif + +#if defined(__linux__) + /* Some versions of Linux need explicit sync-ing of directories as well as files. This setting requests that. If the directory is on NFS, it may not be possible to sync it - in that case, Exim now should ignore the error. But @@ -19,15 +50,6 @@ storage" as quickly as Exim thinks they are. */ #define NEED_SYNC_DIRECTORY -/* Other OS have "const" in here */ -#define ICONV_ARG2_TYPE char ** - -#define F_FREESP O_TRUNC -typedef struct flock flock_t; - -#define os_strsignal strsignal -#define OS_STRSIGNAL - #define os_find_running_interfaces os_find_running_interfaces_linux /* Need a prototype for the Linux-specific function. The structure hasn't @@ -36,4 +58,34 @@ been defined yet, so we need to pre-declare it. */ struct ip_address_item; 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_SOUCE +# define EXIM_HAVE_OPENAT +#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 + + /* End */