107 lines
3.1 KiB
Text
107 lines
3.1 KiB
Text
/* Exim: OS-specific C header file for Linux */
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/* Copyright (c) The Exim Maintainers 2021 - 2024 */
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/* Copyright (c) University of Cambridge 1995 - 2020 */
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* See the file NOTICE for conditions of use and distribution. */
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/* Some old systems we've received bug-reports for have a <limits.h> which
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does not pull in <features.h>. Best to just pull it in now and have done
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with the issue. */
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#include <features.h>
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#include <sys/types.h>
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#define CRYPT_H
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#define GLIBC_IP_OPTIONS
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#define HAVE_MMAP
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#define HAVE_BSD_GETLOADAVG
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#define HAVE_SYS_STATVFS_H
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#define HAVE_GETIFADDRS
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#define NO_IP_VAR_H
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#define SIG_IGN_WORKS
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/* When using DKIM, setting OS_SENDFILE can increase
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performance on outgoing mail a bit. Note: With older glibc versions
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this setting will conflict with the _FILE_OFFSET_BITS=64 setting
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defined as part of the Linux CFLAGS. As of 2017 those are declared
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to be too old to build by default. */
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#define OS_SENDFILE
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extern ssize_t os_sendfile(int, int, off_t *, size_t);
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#define F_FREESP O_TRUNC
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typedef struct flock flock_t;
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#define os_strsignal strsignal
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#define OS_STRSIGNAL
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#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__)
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# define SIOCGIFCONF_GIVES_ADDR
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# define HAVE_SYS_MOUNT_H
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#endif
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#if defined(__linux__)
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/* Some versions of Linux need explicit sync-ing of directories as well as
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files. This setting requests that. If the directory is on NFS, it may not
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be possible to sync it - in that case, Exim now should ignore the error. But
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if you have problems in that area, try undefining this. But be aware that you
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may be in a situation where files are not being properly "committed to stable
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storage" as quickly as Exim thinks they are. */
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#define NEED_SYNC_DIRECTORY
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#define os_find_running_interfaces os_find_running_interfaces_linux
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/* Need a prototype for the Linux-specific function. The structure hasn't
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been defined yet, so we need to pre-declare it. */
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struct ip_address_item;
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extern struct ip_address_item *os_find_running_interfaces_linux(void);
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#endif /* __linux__ */
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/* Some folks running "unusual" setups with very old libc environments have
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found that _GNU_SOURCE=1 before <features.h> is not sufficient to define some
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constants needed for 64-bit arithmetic. If you encounter build errors based
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on LLONG_MIN being undefined and various other escape hatches have not helped,
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then change the 0 to 1 in the next block. */
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#if 0
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# define LLONG_MIN LONG_LONG_MIN
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# define LLONG_MAX LONG_LONG_MAX
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#endif
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#if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOURCE
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# define EXIM_HAVE_OPENAT
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# define EXIM_HAVE_FUTIMENS
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#endif
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/* TCP Fast Open support */
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#include <netinet/tcp.h> /* for TCP_FASTOPEN */
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#include <sys/socket.h> /* for MSG_FASTOPEN */
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#if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN)
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# define MSG_FASTOPEN 0x20000000
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#endif
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#define EXIM_HAVE_TCPI_UNACKED
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#ifndef TCPI_OPT_SYN_DATA
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# define TCPI_OPT_SYN_DATA 32
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#endif
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/* "Abstract" Unix-socket names */
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#define EXIM_HAVE_ABSTRACT_UNIX_SOCKETS
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/* inotify(7) etc syscalls */
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#define EXIM_HAVE_INOTIFY
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/* Needed for uClibc */
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#ifndef NS_MAXMSG
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# define NS_MAXMSG 65535
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#endif
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#define EXIM_HAVE_STRCHRNUL
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/* End */
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