2 Copyright (C) by Andrew Tridgell 1996, 2000
3 Copyright (C) Paul Mackerras 1996
4 Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define BLOCK_SIZE 700
26 #define RSYNC_RSH_ENV "RSYNC_RSH"
28 #define RSYNC_NAME "rsync"
29 #define RSYNCD_SYSCONF "/etc/rsyncd.conf"
30 #define RSYNCD_USERCONF "rsyncd.conf"
32 #define DEFAULT_LOCK_FILE "/var/run/rsyncd.lock"
33 #define URL_PREFIX "rsync://"
35 #define BACKUP_SUFFIX "~"
37 /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is
38 incompatible with older versions :-( */
42 #define FLAG_DELETE (1<<0)
43 #define SAME_MODE (1<<1)
44 #define SAME_RDEV (1<<2)
45 #define SAME_UID (1<<3)
46 #define SAME_GID (1<<4)
47 #define SAME_DIR (1<<5)
48 #define SAME_NAME SAME_DIR
49 #define LONG_NAME (1<<6)
50 #define SAME_TIME (1<<7)
52 /* update this if you make incompatible changes */
53 #define PROTOCOL_VERSION 27
55 /* We refuse to interoperate with versions that are not in this range.
56 * Note that we assume we'll work with later versions: the onus is on
57 * people writing them to make sure that they don't send us anything
58 * we won't understand.
60 * Interoperation with old but supported protocol versions
61 * should cause a warning to be printed. At a future date
62 * the old protocol will become the minimum and
63 * compatibility code removed.
65 * There are two possible explanations for the limit at
66 * MAX_PROTOCOL_VERSION: either to allow new major-rev versions that
67 * do not interoperate with us, and (more likely) so that we can
68 * detect an attempt to connect rsync to a non-rsync server, which is
69 * unlikely to begin by sending a byte between MIN_PROTOCL_VERSION and
70 * MAX_PROTOCOL_VERSION. */
72 #define MIN_PROTOCOL_VERSION 17
73 #define OLD_PROTOCOL_VERSION 20
74 #define MAX_PROTOCOL_VERSION 40
76 #define RSYNC_PORT 873
78 #define SPARSE_WRITE_SIZE (1024)
79 #define WRITE_SIZE (32*1024)
80 #define CHUNK_SIZE (32*1024)
81 #define MAX_MAP_SIZE (256*1024)
82 #define IO_BUFFER_SIZE (4092)
89 #define SERVER_EXCLUDES 1
90 #define ALL_EXCLUDES 2
93 #define MISSING_FATAL 1
98 /* Log values. I *think* what these mean is: FLOG goes to the server
99 * logfile; FERROR and FINFO try to end up on the client, with
100 * different levels of filtering. */
101 enum logcode {FNONE=0, FERROR=1, FINFO=2, FLOG=3 };
107 /* The default RSYNC_RSH is always set in config.h, either to "remsh",
108 * "rsh", or otherwise something specified by the user. HAVE_REMSH
109 * controls parameter munging for HP/UX, etc. */
111 #include <sys/types.h>
119 #ifdef HAVE_SYS_PARAM_H
120 #include <sys/param.h>
131 #ifdef HAVE_SYS_SOCKET_H
132 #include <sys/socket.h>
139 #ifdef TIME_WITH_SYS_TIME
140 #include <sys/time.h>
143 #ifdef HAVE_SYS_TIME_H
144 #include <sys/time.h>
153 #ifdef HAVE_SYS_FCNTL_H
154 #include <sys/fcntl.h>
158 #include <sys/stat.h>
160 #ifdef HAVE_SYS_IOCTL_H
161 #include <sys/ioctl.h>
164 #ifdef HAVE_SYS_FILIO_H
165 #include <sys/filio.h>
169 #ifdef HAVE_SYS_WAIT_H
170 #include <sys/wait.h>
184 #ifdef HAVE_SYS_SELECT_H
185 #include <sys/select.h>
188 #ifdef HAVE_SYS_MODE_H
189 /* apparently AIX needs this for S_ISLNK */
191 #include <sys/mode.h>
203 /* these are needed for the uid/gid mapping code */
208 #include <netinet/in.h>
209 #include <arpa/inet.h>
212 #include <sys/file.h>
217 # define dirent direct
219 # include <sys/ndir.h>
222 # include <sys/dir.h>
239 #define uchar unsigned char
242 #if HAVE_UNSIGNED_CHAR
243 #define schar signed char
249 #if (SIZEOF_INT == 4)
251 #elif (SIZEOF_LONG == 4)
253 #elif (SIZEOF_SHORT == 4)
256 /* I hope this works */
263 #define uint32 unsigned int32
267 #define OFF_T off64_t
268 #define STRUCT_STAT struct stat64
271 #define STRUCT_STAT struct stat
275 #define int64 off64_t
276 #elif (SIZEOF_LONG == 8)
278 #elif (SIZEOF_INT == 8)
281 #define int64 long long
283 /* As long as it gets... */
288 #if (SIZEOF_LONG == 8)
289 #define uint64 unsigned long
290 #elif (SIZEOF_INT == 8)
291 #define uint64 unsigned int
293 #define uint64 unsigned long long
295 /* As long as it gets... */
296 #define uint64 unsigned off_t
299 /* Starting from protocol version 26, we always use 64-bit
300 * ino_t and dev_t internally, even if this platform does not
301 * allow files to have 64-bit inums. That's because the
302 * receiver needs to find duplicate (dev,ino) tuples to detect
303 * hardlinks, and it might have files coming from a platform
304 * that has 64-bit inums.
306 * The only exception is if we're on a platform with no 64-bit type at
309 * Because we use read_longint() to get these off the wire, if you
310 * transfer devices or hardlinks with dev or inum > 2**32 to a machine
311 * with no 64-bit types then you will get an overflow error. Probably
312 * not many people have that combination of machines, and you can
313 * avoid it by not preserving hardlinks or not transferring device
314 * nodes. It's not clear that any other behaviour is better.
316 * Note that if you transfer devices from a 64-bit-devt machine (say,
317 * Solaris) to a 32-bit-devt machine (say, Linux-2.2/x86) then the
318 * device numbers will be truncated. But it's a kind of silly thing
321 * FIXME: In future, we should probable split the device number into
322 * major/minor, and transfer the two parts as 32-bit ints. That gives
323 * you somewhat more of a chance that they'll come from a big machine
324 * to a little one in a useful way.
326 * FIXME: Really we need an unsigned type, and we perhaps ought to
327 * cope with platforms on which this is an unsigned int or even a
330 #define INO64_T uint64
331 #define DEV64_T uint64
334 #define MIN(a,b) ((a)<(b)?(a):(b))
338 #define MAX(a,b) ((a)>(b)?(a):(b))
341 #ifndef MAXHOSTNAMELEN
342 #define MAXHOSTNAMELEN 256
345 /* the length of the md4 checksum */
346 #define MD4_SUM_LENGTH 16
347 #define SUM_LENGTH 16
348 #define SHORT_SUM_LENGTH 2
349 #define BLOCKSUM_BIAS 10
352 #define MAXPATHLEN 1024
360 #define INADDR_NONE 0xffffffff
363 #ifndef IN_LOOPBACKNET
364 #define IN_LOOPBACKNET 127
374 /** Device this file lives upon */
377 /** If this is a device node, the device number. */
389 #define ARENA_SIZE (32 * 1024)
395 struct string_area *next;
401 struct file_struct **files;
402 struct string_area *string_area;
406 OFF_T offset; /**< offset in file of this chunk */
407 int len; /**< length of chunk of file */
408 int i; /**< index of this chunk */
409 uint32 sum1; /**< simple checksum */
410 char sum2[SUM_LENGTH]; /**< checksum */
414 OFF_T flength; /**< total file length */
415 size_t count; /**< how many chunks */
416 size_t remainder; /**< flength % block_length */
417 size_t blength; /**< block_length */
418 size_t s2length; /**< sum2_length */
419 struct sum_buf *sums; /**< points to info for each chunk */
425 OFF_T file_size, p_offset, p_fd_offset;
428 #define MATCHFLG_WILD 0x0001 /* pattern has '*', '[', and/or '?' */
429 #define MATCHFLG_WILD2 0x0002 /* pattern has '**' */
430 #define MATCHFLG_WILD2_PREFIX 0x0004 /* pattern starts with '**' */
431 #define MATCHFLG_ABS_PATH 0x0008 /* path-match on absolute path */
432 struct exclude_struct {
442 int64 total_transferred_size;
449 int num_transferred_files;
453 /* we need this function because of the silly way in which duplicate
454 entries are handled in the file lists - we can't change this
455 without breaking existing versions */
456 static inline int flist_up(struct file_list *flist, int i)
458 while (!flist->files[i]->basename) i++;
462 #include "byteorder.h"
463 #include "lib/mdfour.h"
464 #include "lib/wildmatch.h"
465 #include "lib/permstring.h"
466 #include "lib/addrinfo.h"
470 /* We have replacement versions of these if they're missing. */
471 #ifndef HAVE_ASPRINTF
472 int asprintf(char **ptr, const char *format, ...);
475 #ifndef HAVE_VASPRINTF
476 int vasprintf(char **ptr, const char *format, va_list ap);
479 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
480 #define vsnprintf rsync_vsnprintf
481 int vsnprintf(char *str, size_t count, const char *fmt, va_list args);
484 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
485 #define snprintf rsync_snprintf
486 int snprintf(char *str,size_t count,const char *fmt,...);
491 extern char *sys_errlist[];
492 #define strerror(i) sys_errlist[i]
496 # define strchr index
497 # define strrchr rindex
500 #ifndef HAVE_ERRNO_DECL
504 #define SUPPORT_LINKS HAVE_READLINK
505 #define SUPPORT_HARD_LINKS HAVE_LINK
507 /* This could be bad on systems which have no lchown and where chown
508 * follows symbollic links. On such systems it might be better not to
509 * try to chown symlinks at all. */
514 #define SIGNAL_CAST (RETSIGTYPE (*)())
517 #define EWOULDBLOCK EAGAIN
521 #define STDIN_FILENO 0
524 #ifndef STDOUT_FILENO
525 #define STDOUT_FILENO 1
528 #ifndef STDERR_FILENO
529 #define STDERR_FILENO 2
537 #define ACCESSPERMS 0777
544 #define CHMOD_BITS (S_ISUID | S_ISGID | S_ISVTX | ACCESSPERMS)
547 #define _S_IFMT 0170000
551 #define _S_IFLNK 0120000
555 #define S_ISLNK(mode) (((mode) & (_S_IFMT)) == (_S_IFLNK))
559 #define S_ISBLK(mode) (((mode) & (_S_IFMT)) == (_S_IFBLK))
563 #define S_ISCHR(mode) (((mode) & (_S_IFMT)) == (_S_IFCHR))
568 #define S_ISSOCK(mode) (((mode) & (_S_IFMT)) == (_S_IFSOCK))
570 #define S_ISSOCK(mode) (0)
576 #define S_ISFIFO(mode) (((mode) & (_S_IFMT)) == (_S_IFIFO))
578 #define S_ISFIFO(mode) (0)
583 #define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
587 #define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
590 /* work out what fcntl flag to use for non-blocking */
592 # define NONBLOCK_FLAG O_NONBLOCK
594 # define NONBLOCK_FLAG O_NDELAY
596 # define NONBLOCK_FLAG FNDELAY
599 #ifndef INADDR_LOOPBACK
600 #define INADDR_LOOPBACK 0x7f000001
604 #define INADDR_NONE 0xffffffff
607 #define IS_DEVICE(mode) (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) || S_ISFIFO(mode))
609 /* Initial mask on permissions given to temporary files. Mask off setuid
610 bits and group access because of potential race-condition security
611 holes, and mask other access because mode 707 is bizarre */
612 #define INITACCESSPERMS 0700
614 /* handler for null strings in printf format */
615 #define NS(s) ((s)?(s):"<NULL>")
617 #if !defined(__GNUC__) || defined(APPLE)
618 /* Apparently the OS X port of gcc gags on __attribute__.
620 * <http://www.opensource.apple.com/bugs/X/gcc/2512150.html> */
621 #define __attribute__(x)
626 /* use magic gcc attributes to catch format errors */
627 void rprintf(enum logcode , const char *, ...)
628 __attribute__((format (printf, 2, 3)))
631 /* This is just like rprintf, but it also tries to print some
632 * representation of the error code. Normally errcode = errno. */
633 void rsyserr(enum logcode, int, const char *, ...)
634 __attribute__((format (printf, 3, 4)))
637 #ifdef REPLACE_INET_NTOA
638 #define inet_ntoa rep_inet_ntoa
641 /* Make sure that the O_BINARY flag is defined. */
647 size_t strlcpy(char *d, const char *s, size_t bufsize);
651 size_t strlcat(char *d, const char *s, size_t bufsize);
655 #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF))
658 #define exit_cleanup(code) _exit_cleanup(code, __FILE__, __LINE__)
663 #ifndef HAVE_INET_NTOP
665 inet_ntop(int af, const void *src, char *dst, size_t size);
666 #endif /* !HAVE_INET_NTOP */
668 #ifndef HAVE_INET_PTON
669 int inet_pton(int af, const char *src, void *dst);
672 #ifdef MAINTAINER_MODE
673 const char *get_panic_action(void);
676 #define UNUSED(x) x __attribute__((__unused__))
678 extern const char *io_write_phase, *io_read_phase;