1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* Source files for exim all #include this header, which drags in everything
10 that is needed. They don't all need everything, of course, but it's far too
11 messy to have each one importing its own list, and anyway, most of them need
12 most of these includes. */
14 /* Assume most systems have statfs() unless os.h undefines this macro */
18 /* Similarly, assume most systems have srandom() unless os.h undefines it.
19 This call dates back at least as far as SUSv2. */
23 /* This is primarily for the Gnu C library; we define it before os.h so that
24 os.h has a chance to hurriedly undef it, Just In Case. */
26 #define _ISOC99_SOURCE 1
28 /* First of all include the os-specific header, which might set things that
29 are needed by any of the other headers, including system headers. */
33 /* If it didn't define os_find_running_interfaces, use the common function. */
35 #ifndef os_find_running_interfaces
36 #define os_find_running_interfaces os_common_find_running_interfaces
39 /* If it didn't define the base for "base 62" numbers, we really do use 62.
40 This is the case for all real Unix and Unix-like OS. It's only Cygwin and
41 Darwin, with their case-insensitive file systems, that can't use base 62 for
42 making unique names. */
48 /* The maximum value of localhost_number depends on the base being used */
51 #define LOCALHOST_MAX 16
53 #define LOCALHOST_MAX 10
56 /* If not overriden by os.h, dynamic libraries have filenames ending .so */
58 # define DYNLIB_FN_EXT "so"
61 /* ANSI C standard includes */
77 #if defined(__svr4__) && defined(__sparc) && ! defined(__EXTENSIONS__)
78 #define __EXTENSIONS__ /* so that SunOS 5 gets NGROUPS_MAX */
85 /* C99 integer types, figure out how to undo this if needed for older systems */
89 /* Just in case some aged system doesn't define them... */
92 #define INT_MAX 2147483647
96 #define INT_MIN (-INT_MAX - 1)
100 #define SHRT_MAX 32767
104 #define UCHAR_MAX 255
107 /* Some systems have PATH_MAX and some have MAX_PATH_LEN. */
111 #define PATH_MAX MAX_PATH_LEN
113 #define PATH_MAX 1024
117 #include <sys/types.h>
118 #include <sys/file.h>
128 /* Not all systems have flock() available. Those that do must define LOCK_SH
135 #ifndef NO_SYSEXITS /* some OS don't have this */
136 #include <sysexits.h>
139 /* A few OS don't have socklen_t; their os.h files define EXIM_SOCKLEN_T to
140 be size_t or whatever. We used to use SOCKLEN_T, but then it was discovered
141 that this is used by the AIX include files. */
143 #ifndef EXIM_SOCKLEN_T
144 #define EXIM_SOCKLEN_T socklen_t
147 /* Ensure that the sysexits we reference are defined */
149 #ifndef EX_UNAVAILABLE
150 #define EX_UNAVAILABLE 69 /* service unavailable; used for execv fail */
153 #define EX_CANTCREAT 73 /* can't create file: treat as temporary */
156 #define EX_TEMPFAIL 75 /* temp failure; user is invited to retry */
159 #define EX_CONFIG 78 /* configuration error */
162 /* This one is not in any sysexits file that I've come across */
164 #define EX_EXECFAILED 127 /* execve() failed */
167 #include <sys/time.h>
168 #include <sys/param.h>
170 #ifndef NO_SYS_RESOURCE_H /* QNX doesn't have this */
171 #include <sys/resource.h>
174 #include <sys/socket.h>
176 /* If we are on an IPv6 system, the macro AF_INET6 will have been defined in
177 the sys/socket.h header. It is helpful to have this defined on an IPv4 system
178 so that it can appear in the code, even if it is never actually used when
179 the code is run. It saves some #ifdef occurrences. */
185 #include <sys/ioctl.h>
187 /* The new standard is statvfs; some OS have statfs. For statvfs the block
188 counts must be multiplied by the "fragment size" f_frsize to get the actual
189 size. In other cases the value seems to be f_bsize (which is sometimes the only
190 block size), so we use a macro to get that instead.
192 Also arrange to be able to cut it out altogether for way-out OS that don't have
193 anything. I've indented a bit here to try to make the mess a bit more
194 intelligible. Note that simply defining one name to be another when
195 HAVE_SYS_STATVFS_H is not set will not work if the system has a statvfs macro
196 or a macro with entries f_frsize and f_bsize. */
199 #ifdef HAVE_SYS_STATVFS_H
200 #include <sys/statvfs.h>
201 #define STATVFS statvfs
202 #define F_FRSIZE f_frsize
204 #define STATVFS statfs
205 #define F_FRSIZE f_bsize
206 #ifdef HAVE_SYS_VFS_H
208 #ifdef HAVE_SYS_STATFS_H
209 #include <sys/statfs.h>
212 #ifdef HAVE_SYS_MOUNT_H
213 #include <sys/mount.h>
217 /* Macros for the fields for the available space for non-superusers; define
218 these only if the OS header has not. Not all OS have f_favail; those that
219 are known to have it define F_FAVAIL as f_favail. The default is to use
223 #define F_BAVAIL f_bavail
227 #define F_FAVAIL f_ffree
230 /* All the systems I've been able to look at seem to have F_FILES */
233 #define F_FILES f_files
239 #ifndef SIOCGIFCONF /* HACK for SunOS 5 */
240 #include <sys/sockio.h>
243 #include <sys/stat.h>
244 #include <sys/wait.h>
245 #include <sys/utsname.h>
248 /* There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
249 with the definition in sysexits.h. Exim does not actually use this macro, so we
250 just undefine it. It would be nice to be able to re-instate the definition from
251 sysexits.h if there is no definition in unistd.h, but I do not think there is a
252 way to do this in C because macro definitions are not scanned for other macros
253 at definition time. [The code here used to assume they were, until I was
254 disabused of the notion. Luckily, since EX_OK is not used, it didn't matter.] */
267 #include <netinet/in.h>
268 #include <netinet/tcp.h>
269 #include <arpa/inet.h>
270 #include <arpa/nameser.h>
273 /* If arpa/nameser.h defines a maximum name server packet size, use it,
274 provided it is greater than 2048. Otherwise go for a default. PACKETSZ was used
275 for this, but it seems that NS_PACKETSZ is coming into use. */
277 #if defined(NS_PACKETSZ) && NS_PACKETSZ >= 2048
278 #define MAXPACKET NS_PACKETSZ
279 #elif defined(PACKETSZ) && PACKETSZ >= 2048
280 #define MAXPACKET PACKETSZ
282 #define MAXPACKET 2048
285 /* While IPv6 is still young the definitions of T_AAAA and T_A6 may not be
286 included in arpa/nameser.h. Fudge them here. */
296 /* Ancient systems (e.g. SunOS4) don't appear to have T_TXT defined in their
297 header files. I don't suppose they have T_SRV either. */
307 /* Many systems do not have T_SPF. */
313 /* It seems that some versions of arpa/nameser.h don't define *any* of the
314 T_xxx macros, which seem to be non-standard nowadays. Just to be on the safe
315 side, put in definitions for all the ones that Exim uses. */
342 /* We define a few private types for special DNS lookups:
344 . T_ZNS gets the nameservers of the enclosing zone of a domain
346 . T_MXH gets the MX hostnames only (without their priorities)
348 . T_CSA gets the domain's Client SMTP Authorization SRV record
356 /* The resolv.h header defines __P(x) on some Solaris 2.5.1 systems (without
357 checking that it is already defined, in fact). This conflicts with other
358 headers that behave likewise (see below), leading to compiler warnings. Arrange
359 to undefine it if resolv.h defines it. */
362 #define __P_WAS_DEFINED_BEFORE_RESOLV
367 #if defined(__P) && ! defined (__P_WAS_DEFINED_BEFORE_RESOLV)
371 /* If not defined by os.h, we do nothing special to push DNS resolver state
372 back to be available by the classic resolver routines. Also, provide
373 prototype for our get routine, unless defined away. */
375 #ifndef os_put_dns_resolver_res
376 # define os_put_dns_resolver_res(R) do {/**/} while(0)
378 #ifndef os_get_dns_resolver_res
379 res_state os_get_dns_resolver_res(void);
382 /* These three are to support the IP option logging code. Linux is
383 different to everyone else and there are also other systems which don't
384 have netinet/ip_var.h, so there's a general macro to control its inclusion. */
386 #include <netinet/in_systm.h>
387 #include <netinet/ip.h>
390 #include <netinet/ip_var.h>
393 /* Linux (and some others) uses a different type for the 2nd argument of
394 iconv(). It's os.h file defines ICONV_ARG2_TYPE. For the rest, define a default
397 #ifndef ICONV_ARG2_TYPE
398 #define ICONV_ARG2_TYPE const char **
401 /* One OS uses a different type for the 5th argument of getsockopt */
403 #ifndef GETSOCKOPT_ARG5_TYPE
404 #define GETSOCKOPT_ARG5_TYPE socklen_t *
407 /* One operating system uses a different type for the 2nd argument of select().
408 Its os.h file defines SELECT_ARG2_TYPE. For the rest, define a default here. */
410 #ifndef SELECT_ARG2_TYPE
411 #define SELECT_ARG2_TYPE fd_set
414 /* One operating system uses a different type for the 4th argument of
415 dn_expand(). Its os.h file defines DN_EXPAND_ARG4_TYPE. For the rest, define a
418 #ifndef DN_EXPAND_ARG4_TYPE
419 #define DN_EXPAND_ARG4_TYPE char *
422 /* One operating system defines a different type for the yield of inet_addr().
423 In Exim code, its value is always assigned to the s_addr members of address
424 structures. Casting the yield to the type of s_addr should fix the problem,
425 since the size of the data is correct. Just in case this ever has to be
426 changed, use a macro for the type, and define it here so that it is possible to
427 use different values for specific OS if ever necessary. */
430 #define S_ADDR_TYPE u_long
433 /* (At least) one operating system (Solaris) defines a different type for the
434 second argument of pam_converse() - the difference is the absence of "const".
435 Its os.h file defines PAM_CONVERSE_ARG2_TYPE. For the rest, define a default
438 #ifndef PAM_CONVERSE_ARG2_TYPE
439 #define PAM_CONVERSE_ARG2_TYPE const struct pam_message
442 /* One operating system (SunOS4) defines getc, ungetc, feof, and ferror as
443 macros and not as functions. Exim needs them to be assignable functions. This
444 flag gets set to cause this to be sorted out here. */
446 #ifdef FUDGE_GETC_AND_FRIENDS
448 extern int getc(FILE *);
450 extern int ungetc(int, FILE *);
452 extern int feof(FILE *);
454 extern int ferror(FILE *);
457 /* The header from the PCRE regex package */
461 /* Exim includes are in several files. Note that local_scan.h #includes
462 config.h, mytypes.h, and store.h, so we don't need to mention them explicitly.
465 #include "local_scan.h"
470 #include "functions.h"
471 #include "dbfunctions.h"
472 #include "osfunctions.h"
474 #ifdef EXPERIMENTAL_BRIGHTMAIL
475 #include "bmi_spam.h"
477 #ifdef EXPERIMENTAL_SPF
480 #ifdef EXPERIMENTAL_SRS
487 /* The following stuff must follow the inclusion of config.h because it
488 requires various things that are set therein. */
490 #if HAVE_ICONV /* Not all OS have this */
494 #if defined(USE_READLINE) || defined(EXPAND_DLFUNC) || defined (LOOKUP_MODULE_DIR)
498 #ifdef ENABLE_DISABLE_FSYNC
499 #define EXIMfsync(f) (disable_fsync? 0 : fsync(f))
501 #define EXIMfsync(f) fsync(f)
504 /* Backward compatibility; LOOKUP_LSEARCH now includes all three */
506 #if (!defined LOOKUP_LSEARCH) && (defined LOOKUP_WILDLSEARCH || defined LOOKUP_NWILDLSEARCH)
507 #define LOOKUP_LSEARCH yes
510 /* Define a union to hold either an IPv4 or an IPv6 sockaddr structure; this
511 simplifies some of the coding. We include the sockaddr to reduce type-punning
515 struct sockaddr_in v4;
517 struct sockaddr_in6 v6;
522 /* If SUPPORT_TLS is not defined, ensure that USE_GNUTLS is also not defined
523 so that if USE_GNUTLS *is* set, we can assume SUPPORT_TLS is also set. */
529 /* If SPOOL_DIRECTORY, LOG_FILE_PATH or PID_FILE_PATH have not been defined,
530 set them to the null string. */
532 #ifndef SPOOL_DIRECTORY
533 #define SPOOL_DIRECTORY ""
535 #ifndef LOG_FILE_PATH
536 #define LOG_FILE_PATH ""
538 #ifndef PID_FILE_PATH
539 #define PID_FILE_PATH ""
542 /* The EDQUOT error code isn't universally available, though it is widespread.
543 There is a particular shambles in SunOS5, where it did not exist originally,
544 but got installed with a particular patch for Solaris 2.4. There is a
545 configuration variable for specifying what the system's "over quota" error is,
546 which will end up in config.h if supplied in OS/Makefile-xxx. If it is not set,
547 default to EDQUOT if it exists, otherwise ENOSPC. */
551 #define ERRNO_QUOTA EDQUOT
553 #define ERRNO_QUOTA ENOSPC
557 /* Ensure PATH_MAX is defined */
561 #define PATH_MAX MAXPATHLEN
563 #define PATH_MAX 1024