X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/2f43ad4af98a7f1a6fa70b15ffa0bd29ce777418..3bb1e9f161fd22707bc7cfcd77772422ac0fdd8e:/src/OS/os.h-Linux?ds=sidebyside diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux index 8d87df0b8..2fa1b0b82 100644 --- a/src/OS/os.h-Linux +++ b/src/OS/os.h-Linux @@ -1,6 +1,15 @@ -/* $Cambridge: exim/src/OS/os.h-Linux,v 1.5 2006/12/20 19:54:23 tom Exp $ */ - /* Exim: OS-specific C header file for Linux */ +/* Copyright (c) University of Cambridge 1995 - 2020 */ +/* 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 @@ -10,12 +19,14 @@ #define NO_IP_VAR_H #define SIG_IGN_WORKS -/* When using the experimental Domainkeys/DKIM extensions, setting -HAVE_LINUX_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. */ +/* 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 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 +35,8 @@ 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 +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 os_find_running_interfaces os_find_running_interfaces_linux /* Need a prototype for the Linux-specific function. The structure hasn't @@ -52,4 +60,39 @@ 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 + + /* End */