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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:44:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:44:07 +0000
commit39ce00b8d520cbecbd6af87257e8fb11df0ec273 (patch)
tree4c21a2674c19e5c44be3b3550b476b9e63d8ae3d /OS/os.h-Linux
parentInitial commit. (diff)
downloadexim4-39ce00b8d520cbecbd6af87257e8fb11df0ec273.tar.xz
exim4-39ce00b8d520cbecbd6af87257e8fb11df0ec273.zip
Adding upstream version 4.94.2.upstream/4.94.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--OS/os.h-Linux94
1 files changed, 94 insertions, 0 deletions
diff --git a/OS/os.h-Linux b/OS/os.h-Linux
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+++ b/OS/os.h-Linux
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+/* 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 <limits.h> which
+does not pull in <features.h>. Best to just pull it in now and have done
+with the issue. */
+
+#include <features.h>
+#include <sys/types.h>
+
+
+#define CRYPT_H
+#define GLIBC_IP_OPTIONS
+#define HAVE_MMAP
+#define HAVE_BSD_GETLOADAVG
+#define HAVE_SYS_STATVFS_H
+#define NO_IP_VAR_H
+#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
+if you have problems in that area, try undefining this. But be aware that you
+may be in a situation where files are not being properly "committed to stable
+storage" as quickly as Exim thinks they are. */
+
+#define NEED_SYNC_DIRECTORY
+
+#define os_find_running_interfaces os_find_running_interfaces_linux
+
+/* Need a prototype for the Linux-specific function. The structure hasn't
+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 <features.h> 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 <netinet/tcp.h> /* for TCP_FASTOPEN */
+#include <sys/socket.h> /* 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
+
+
+/* End */