projects / exim.git / blame
| Commit | Line | Data |
|---|---|---|
| 61ec970d PH |
1 | /* Exim: OS-specific C header file for Linux */ |
| 2 | ||
| b87a6e0e PP |
3 | /* Some old systems we've received bug-reports for have a <limits.h> which |
| 4 | does not pull in <features.h>. Best to just pull it in now and have done | |
| 5 | with the issue. */ | |
| 9d26b8c0 PP |
6 | |
| 7 | #include <features.h> | |
| 8 | ||
| 9 | ||
| 61ec970d PH |
10 | #define CRYPT_H |
| 11 | #define GLIBC_IP_OPTIONS | |
| 12 | #define HAVE_MMAP | |
| 6e2b4ccc | 13 | #define HAVE_BSD_GETLOADAVG |
| 26034054 | 14 | #define HAVE_SYS_STATVFS_H |
| 61ec970d | 15 | #define NO_IP_VAR_H |
| 61ec970d PH |
16 | #define SIG_IGN_WORKS |
| 17 | ||
| 80a47a2c TK |
18 | /* When using the DKIM, setting HAVE_LINUX_SENDFILE can increase |
| 19 | performance on outgoing mail a bit. Note: With older glibc versions | |
| 20 | this setting will conflict with the _FILE_OFFSET_BITS=64 setting | |
| eeb35890 JH |
21 | defined as part of the Linux CFLAGS. As of 2017 those are declared |
| 22 | to be too old to build by default. */ | |
| 2f43ad4a | 23 | |
| eeb35890 | 24 | #define HAVE_LINUX_SENDFILE |
| 2f43ad4a | 25 | |
| 6e2b4ccc PH |
26 | #define F_FREESP O_TRUNC |
| 27 | typedef struct flock flock_t; | |
| 28 | ||
| 29 | #define os_strsignal strsignal | |
| 30 | #define OS_STRSIGNAL | |
| 31 | ||
| 32 | #if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__) | |
| 33 | #define SIOCGIFCONF_GIVES_ADDR | |
| 34 | #define HAVE_SYS_MOUNT_H | |
| 35 | #endif | |
| 36 | ||
| 37 | #if defined(__linux__) | |
| 38 | ||
| 61ec970d PH |
39 | /* Some versions of Linux need explicit sync-ing of directories as well as |
| 40 | files. This setting requests that. If the directory is on NFS, it may not | |
| 41 | be possible to sync it - in that case, Exim now should ignore the error. But | |
| 42 | if you have problems in that area, try undefining this. But be aware that you | |
| 43 | may be in a situation where files are not being properly "committed to stable | |
| 44 | storage" as quickly as Exim thinks they are. */ | |
| 45 | ||
| 46 | #define NEED_SYNC_DIRECTORY | |
| 47 | ||
| 61ec970d PH |
48 | #define os_find_running_interfaces os_find_running_interfaces_linux |
| 49 | ||
| 50 | /* Need a prototype for the Linux-specific function. The structure hasn't | |
| 51 | been defined yet, so we need to pre-declare it. */ | |
| 52 | ||
| 53 | struct ip_address_item; | |
| 54 | extern struct ip_address_item *os_find_running_interfaces_linux(void); | |
| 55 | ||
| 6e2b4ccc PH |
56 | #endif /* __linux__ */ |
| 57 | ||
| 05ec18de PP |
58 | /* Some folks running "unusual" setups with very old libc environments have |
| 59 | found that _GNU_SOURCE=1 before <features.h> is not sufficient to define some | |
| 60 | constants needed for 64-bit arithmetic. If you encounter build errors based | |
| 61 | on LLONG_MIN being undefined and various other escape hatches have not helped, | |
| 62 | then change the 0 to 1 in the next block. */ | |
| 63 | ||
| 64 | #if 0 | |
| 65 | # define LLONG_MIN LONG_LONG_MIN | |
| 66 | # define LLONG_MAX LONG_LONG_MAX | |
| 67 | #endif | |
| 68 | ||
| 10c50704 JH |
69 | #if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOUCE |
| 70 | # define EXIM_HAVE_OPENAT | |
| 71 | #endif | |
| 72 | ||
| 4c089965 JH |
73 | #include <netinet/tcp.h> /* for TCP_FASTOPEN */ |
| 74 | #include <sys/socket.h> /* for MSG_FASTOPEN */ | |
| 18f1b2f3 JH |
75 | #if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN) |
| 76 | # define MSG_FASTOPEN 0x20000000 | |
| 77 | #endif | |
| 78 | ||
| 05ec18de | 79 | |
| 61ec970d | 80 | /* End */ |